Lower Extremity Injuries in Ice Hockey: Current Concepts

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Lower Extremity Injuries in Ice Hockey: Current Concepts

ABSTRACT

Ice hockey is a fast-paced, collision sport requiring tremendous skill and finesse, yet ice hockey can be a harsh and violent game. It has one of the highest musculoskeletal injury rates in all of competitive sports. Razor sharp skates, aluminum sticks and boards made from high density polyethylene (HDPE), all contribute to the intrinsic hazards of the game. The objective of this article is to review evaluation, management, and return-to-the-rink guidelines after common lower extremity ice hockey injuries.

“Hockey is a fast body-contact game played by men with clubs in their hands and knives laced to their feet, since the skates are razor sharp, and before the evening is over it is almost a certainty that someone will be hurt and will fleck the ice with a generous contribution of gore before he is led away to be hemstitched together again.” —Paul Gallico in Farewell to Sport (1938)

Ice hockey is a collision sport with player speeds in excess of 30 miles/hour, on a sheet of ice surrounded by unforgiving boards, with a vulcanized rubber puck moving at speeds approaching 100 miles/hour.1-3 Understanding injuries specific to this fast-paced sport is an essential part of being a team physician at any level of competitive ice hockey. We are continuing to improve our ability to correctly identify and treat injuries in ice hockey players.2,4 On the prevention side, rule changes in hockey have been implemented, such as raising the age to allow checking and penalties for deliberate hits to the head and checking from behind, to make the game safer to play.3 Additionally, advancements in biomechanical research and 3D modeling are providing new insights into the pathoanatomy of the hip joint, which can be utilized for surgical planning in hockey players and goalies suffering from symptomatic femoroacetabular impingement (FAI) of the hip.5

During the 2010 Winter Olympics, more than 30% of ice hockey players were injured, which was the highest percentage amongst all competing sports.6 They also tallied the highest percentage of player-to-player injuries during the Olympics of any sport. Consequently, the team physician covering ice hockey should be prepared to manage upper and lower extremity musculoskeletal injuries, but also concussions, cervical spine injuries, and ocular and dental trauma.2 

One of the earliest epidemiological studies of ice hockey injuries looked at elite Danish hockey players over 2 seasons and found that head trauma accounted for 28% of all injuries, followed by lower extremity injuries at 27% with upper extremity injuries accounting for 19%.7 More recent epidemiological studies have shown similar rates based on body region while further defining individual diagnoses and their incidence. This should help clinicians and researchers develop prevention strategies, as well as improve treatments to optimize player outcomes and return to sport.8,9 Our group recently reviewed the evaluation and management of common head, neck, and shoulder injuries at all competitive levels of ice hockey, and this article serves to complement the former by focusing on lower extremity injuries (Table).2

Continue to: Hip and groin...

 

 

EVALUATION AND MANAGEMENT OF COMMON LOWER EXTREMITY HOCKEY INJURIES

HIP INJURIES

Hip and groin injuries are very common amongst this group of athletes and account for approximately 9% of all ice hockey injuries.1 Unfortunately, they are also known for their high recurrence rates, which may be in part due to delayed diagnosis, inadequate rest and rehabilitation, as well as the extreme loads that are placed on the hip during competition.10,11 In hockey, the most commonly reported hip injuries include goaltender’s hip, FAI, sports hernia/hockey groin syndrome, adductor strains, hip pointer, and quadriceps contusions. Dalton and colleagues12 performed the largest epidemiological study to date on hip and groin injuries amongst National Collegiate Athletic Association ice hockey players and reported that the most common injury mechanism was noncontact in nature. Contact injuries accounted for 13% (55 of 421) in men’s ice hockey players while less than 4% (4 of 114) injuries in female ice hockey players, which is likely attributed to a no checking rule in the women’s division. Some of these hip and groin injuries are difficult to diagnose so it is important for the team physician to perform a thorough history and physical examination. Advanced imaging (magnetic resonance imaging [MRI] or a computed tomography (CT) scan with 3D reconstructions) may be necessary to make the correct diagnosis. This is important for providing proper treatment as well as setting player expectations for return to sport.12

Table 1. Return-to-Play Guidelines for Common Lower Extremity Ice Hockey Injuries

Lower Extremity Injury

Treatment Options

Return-to-the-Rink Goal

 FAI

In-season: injection, physical therapy program, NSAIDS. Off-season or unable to play: requires arthroscopic surgery

Nonoperative can take up to 6 weeks. Surgical depends on what is fixed but goal is 4 months to return to ice24,26

 

Sports hernia/athletic pubalgia

 

In-season: physical therapy program, NSAIDS

Off-season or unable to play requiring surgery. Essential to make sure no other pathology (eg, FAI, osteitis pubis, adductor strain) to maximize success

 

Nonoperative 6-8 wk trial of physical therapy

Operative: depends if concomitant FAI but in isolation goal is 3-4 mo33,54

 

Adductor strains

Ice, NSAIDS, physical therapy, use of Hypervolt Hyperice

Depends on position (goalie vs skater) and severity; can take up to 4-8 wk to return to ice.

Want 70% strength and painless ROM to skate successfully;55 in chronic cases, may take up to 6 mo35

 

Quadriceps contusion

 

Hinged knee brace to maintain 120° of flexion, ice, compression wrap.

 

When player regains motion and strength, return to ice can be as fast a couple of days or as long as 3 wk8,46

 

 MCL

Hinged knee brace, shin pad modification, ice, NSAIDs

Depends on Grade; if Grade I, 1-2 wk; Grade II, 2-4 wk; Grade III, 4-6 wk8

 

 ACL

Surgery autograft BTB

autograft soft tissue

 

9-10 mo41

Meniscus tear

Depends on type of tear and seasonal timing (in-season or off-season)

If surgical, 3-4 mo; if repair,

4-6 wk if partial menisectomy

 

High ankle sprain

 

Cam boot, NSAIDS, ice and physical therapy

 

6 wk49

Boot top laceration

Repair of cut structures, depends on depth and what is injured; best treatment is prevention with Kevlar socks

If laceration is deep and severs any medial tendons/vascular structures, return to ice can be ≥6 mo

 

Lace bite

 

Bunga pad, ice, diclofenac gel

 

Couple of days to up to 2 wk in recalcitrant cases3

Abbreviations: ACL, anterior cruciate ligament; BTB, bone-patellar tendon-bone; Cam, controlled ankle motion boot; MCL, medial collateral ligament; FAI, femoroacetabular impingement; NSAIDS, nonsteroidal anti-inflammatory drugs; ROM, range of motion.

Throughout the hockey community, FAI is being examined as a possible source of symptomatic hip pain amongst players at all levels. A recent study, which utilized the National Hockey League (NHL) injury surveillance database, reported that FAI accounted for 5.3% of all hip and groin injuries.13 The etiology of FAI is thought to arise from a combination of genetic predisposition coupled with repetitive axial loading/hip flexion. This causes a bony overgrowth of the proximal femoral physes resulting in a cam deformity (Figure 1).5,14 The abnormal bony anatomy allows for impingement between the acetabulum and proximal femur, which can injure the labrum and articular cartilage of the hip joint.

Figure 1. Radiograph AP pelvis of ice hockey goaltender with mixed-type femoroacetabular impingement. His alpha angle of right hip measured 65°; an os acetabuli is present.

In the recent study by Ross and colleagues,15 the authors focused on symptomatic hip impingement in ice hockey goalies.15 Goaltender’s hip may be the result of the “butterfly style,” which is a technique of goaltending that emphasizes guarding the lower part of the goal. The goalie drops to his/her knees and internally rotates the hips to allow the leg pads to be parallel to the ice. This style acquired the name butterfly because of the resemblance of the spread goalie pads to a butterfly’s wings. Bedi and associates16 have evaluated hip biomechanics using 3D-generated bone models and showed in their study that arthroscopic treatment can improve hip kinematics and range of motion.

Plain radiographs showed that 90% (61 of 68) of hockey goalies had an elevated alpha angle signifying a femoral cam-type deformity.15 Goalies had a significantly lower mean lateral center-edge angle (27.3°  vs 29.6°; P = .03) and 13.2% of them were found to have acetabular dysplasia (lateral center-edge angle<20°) compared to only 3% of positional players. The CT scan measurements demonstrated that hockey goalies have a unique cam-type deformity that is located more lateral (1:00 o’clock vs 1:45 o’clock; P < .0001) along the proximal femur, an elevated maximum alpha angle (80.9° vs 68.6°; P < .0001) and loss of offset, when compared to positional players. These findings provide an anatomical basis in support of reports that goaltenders are more likely to experience intra-articular hip injuries compared to other positional players.13

Regardless of position, symptomatic FAI in a hockey player is generally a problem that slowly builds and is made worse with activity.17 On examination, the player may have limited hip flexion and internal rotation, as well as weakness compared to the contralateral side when testing hip flexion and abduction.18,19 Plain radiographs plus MRI or CT allow for proper characterization and diagnosis (to include underlying chondrolabral pathology).20,21

In the young athlete, initial management includes physical therapy, which focuses on core strengthening. Emphasis is placed on hip flexion and extension, as well as abduction and external rotation with the goal of reducing symptoms and avoiding injuries.22 A similar approach may be applied to the elite athlete, but failure of nonoperative management may necessitate surgical intervention. Hip arthroscopy continues to grow in popularity over open surgical dislocation with low complication rate and high return-to-play rate.23-25

For the in-season athlete, attempts to continue to play can be assisted with the role of an intra-articular corticosteroid injection, which can help calm inflammation within the hip joint and mitigate pain, while rehabilitation focuses on core stabilization, postural retraining and focusing on any muscle imbalances that might be present. For positional players, ice time and shift duration can be adjusted to give the player’s hip a period of rest; meanwhile, for goaltenders, shot volumes in practice can be decreased.

Continue to: For athletes who...

 

 

For athletes who fail nonoperative care, surgical treatment varies depending on underlying hip pathology and may include femoroplasty, acetabuloplasty, and microfracture as well as labral repair or debridement. Though data are limited, Philippon and colleagues26 have published promising results in a case series of 28 NHL players after surgical intervention for FAI. All players returned to sport at an average of 3.8 months and players who had surgery within 1 year of injury returned on average 1.1 months sooner than those who waited more than 1 year. Rehabilitation protocol varies between goaltenders compared to defensemen and offensive players due to the different demands required for blocking shots on goal.27

One of the most challenging injuries to correctly identify in the hip area is athletic pubalgia (also referred to as sports hernia or core muscle injury) because pain in the groin may be referred from the lumbar spine, hip joint, urologic, or perineal etiologies.28 Sports hernias involve dilatation of the external ring of the inguinal canal and thinning of the posterior wall. Players may report to the athletic trainer or team physician with a complaint of groin pain that is worse when pushing off with their skate or taking a slap shot.29 On exam, pain can be reproduced by hip extension, contralateral torso rotation, or with a resisted sit-up with palpation of the inferolateral edge of the distal rectus abdominus.30 An MRI with specific sequences centered over the pubic symphysis is usually warranted to aid in the workup of sports hernia. An MRI in these cases may also demonstrate avulsions of the rectus abdominus.31

Most of these injuries are managed conservatively but can warrant surgical intervention if the symptoms persist. In the study by Jakoi and colleagues,32 they identified 43 ice hockey players over an 8-year period (2001-2008) who had repairs of their sports hernias and assessed the statistics during the 2 years prior and 2 years after surgery. The authors found that 80% of these players were able to return to the ice for 2 or more full seasons. The return-to-sport rate was comparable to other sports after sports hernia repair, but players who had played in ≥7 seasons demonstrated a greater decrease in number of games played, goals, assists and time on ice compared to those who had played in ≤6 seasons prior to the time of injury. Between 1989 and 2000, 22 NHL players who failed to respond to nonoperative management of their groin injuries underwent surgical exploration.29 At the time of surgical exploration, their hockey groin syndrome, consisted of small tears in the external oblique aponeurosis through which branches of the ilioinguinal or iliohypogastric could be identified. These surgical procedures were all through a standard inguinal approach and the perforating neurovascular structures were excised, while the main trunk of the ilioinguinal nerve was ablated and the external oblique aponeurosis was repaired and reinforced with Goretex (W.L. Gore & Associates Inc, Flagstaff, AZ). At follow-up, 18 of the 22 players (82%) had no pain and 19 (86%) were able to resume their careers in the NHL.29 Ice hockey players with sports hernias or hockey groin syndrome often return to the sport, but it is important to identify these problems early so that surgical options can be discussed if the player fails conservative management. It is also critical to make sure that all pathology is identified, because in players with mixed sports hernia and FAI, return-to-play results improve when both issues are addressed. In a study of athletes (some of whom were ice hockey players), who had both FAI and sports hernia, and only hernia/pubalgia surgery was performed, 25% of these athletes returned to sport. If only FAI was addressed, 50% of the athletes returned to sport; however, when hernia and FAI were treated, 89% returned to play.33

Adductor strains includes injury to the adductor muscles, pectineus, obturator externus and gracilis, and are prevalent in ice hockey players. A study of elite Swedish ice hockey players published in 1988 reported that adductor strains accounted for 10% (10 of 95) of all injuries.34 Given the prevalence of these injuries, considerable research has been dedicated to understanding their mechanism and prevention.35 Adductor strains within the ice hockey population have been attributed to the eccentric forces on the adductors when players attempt to decelerate the leg during a stride.36 A study of NHL players revealed that a ratio <80% of adductor-to-abductor muscle is the best predictor of a groin strain.37

These injuries are also well known for their recurrence rates, as was the case in an NHL study where 4 of the 9 adductor strains (44%) were recurrent injuries.37 The authors attributed the recurrence to an incomplete rehabilitation program and an accelerated return to sport. This was followed by an NHL prevention program that spanned 2 seasons and analyzed 58 players whose adductor-to-abductor ratio was <80% and placed them into a 6-week intervention program during the preseason.37 Only 3 players sustained an adductor strain in the 2 subsequent seasons after the intervention, compared to 11 strains in the previous 2 seasons. Thus, early identification of muscle strength imbalance coupled with an appropriate intervention program has proven to be an effective means of reducing adductor strains in this at-risk population.

Continue to: Contact injuries may...

 

 

Contact injuries may vary with checking into the boards being unique to men’s ice hockey. Hip pointers occur as a result of a direct compression injury to the iliac crest, which causes trauma to the bone but also to the overlying hip abductor musculature, and represent roughly 2.4% of ice hockey injuries.23 The resulting contusion may cause a local hematoma formation. Early identification of the injury plus treatment with RICE (rest, ice, compression, elevation) coupled with crutches to limit weight-bearing status may minimize soft tissue trauma and swelling, and ultimately aid in pain control and return to sport.38 Hip abductor strengthening, added padding over the injured area, as well as a compressive hip spica wrapping, have all been suggested to expedite return to play and help prevent recurrence of the hip pointer.8

KNEE INJURIES

Injury to the medial collateral ligament (MCL) is the most commonly reported knee injury (Figure 2) and second only to concussion amongst all injuries in National Collegiate Athletic Association ice hockey players.8,39 The mechanism of injury typically involves a valgus force on the knee, which is often caused by collision into another player.39 Valgus stress testing with the knee in 30° of flexion is used to grade the severity of injury (Grade I: 0-5 mm of medial opening; Grade II: 5-10 mm of medial opening; Grade III: >10 mm of medial opening).39 One study that followed a single college hockey team for 8 seasons reported that 77% of injuries (10 of 13) occurred during player-to-player collision,39 with 5 being Grade 1 injuries, 6 Grade 2 injuries, 1 Grade 3; information was missing for 1 player. Nonoperative management of incomplete injuries, grade 1 and 2 sprains, with RICE and early physical therapy intervention to work on knee range of motion and quadriceps strengthening typically helps the player return to sport within days for grade 1 and 2 injuries to 3 weeks for grade 2 injuries. Complete tears have been managed both operatively and nonoperatively with evidence to suggest better outcomes after surgical intervention if there is a concomitant ACL injury requiring reconstruction.8,9

Figure 2. MRI of right knee of 16-year-old defenseman who sustained valgus blow to knee. The medial collateral ligament is torn distally and flipped above pes tendons, a Stener-like lesion.

Anterior cruciate ligament (ACL) tears occur less frequently in hockey players compared to the players in other sports such as football and basketball.38,40 Between 2006 and 2010, 47 players were identified by the NHL Injury Surveillance System as having sustained an ACL injury, which equates to an incidence of 9.4 ACL injuries per NHL season over this time span.41 The mechanism of ACL tears in ice hockey players appears to be different from other sports players based on a recent MRI study that evaluated players for concomitant injuries following ACL tear and noted significantly fewer bone bruises on the lateral femoral condyle compared to players in other sports.42 Early evaluation after injury with Lachman and/or pivot shift tests aids the diagnosis. Data from the NHL study identified 32 players (68%) with concomitant meniscal injuries and 32 (68%) had MCL injuries in conjunction with their ACL tears.41 Average length in the league prior to injury was 5.65 seasons. Twenty-nine of the injured players (61.7%) underwent reconstruction with a patellar tendon autograft, 13 (27.7%) had a hamstring autograft, and 5 (10.6%) had either a patellar tendon or hamstring allograft.41 Meniscus and ACL injuries were associated with a decreased length of career compared to age-matched controls and, notably, players >30 years at the time of injury had only a 67% rate of return to sport whereas those <30 years had a return-to-sport rate of 80%. Players who were able to return did so at an average of 9.8 months (range, 6-21 months) and had a significant reduction in total number of goals, assists, and points scored compared to controls. Decline in performance was typically associated with forwards and wings, while defensemen did not demonstrate the same decrease in performance following return to ice hockey.41

Meniscal tears are a well-documented concomitant injury with ruptures of the ACL, and the combination is a known pattern associated with shorter careers compared to isolated ACL tears in ice hockey players.41 The lateral meniscus is known for increased mobility compared to the medial meniscus and is more commonly injured (39% vs 8.5%) in ACL tears that occur in contact sports and downhill skiing.42 Ice hockey presents a scenario that is different from other contact sports because of the near frictionless interaction between the player’s ice skates and playing surface. This likely equates to a different injury mechanism and dissipation of energy after contact as well as non-contact injuries.38 A recent study reviewed knee MRI findings associated with ACL tears in collegiate ice hockey players and compared to other sports known for their high rates of concomitant meniscal pathology. The authors reported a statistically significant decrease in lateral meniscus tears and bone-bruising patterns in ice hockey players with ACL injuries compared to athletes with ACL tears in other sports.43 In contrast, an NHL study of ACL tears in professional ice hockey players found that 68% of players had concomitant meniscal tears (32 out of 47 players).41

Continue to: The presence of...

 

 

The presence of a meniscal tear on MRI is typically a surgical problem, especially if it occurred with an ACL injury. Meniscal repair is preferable, if possible, because there is a known association of increased cartilage contact pressures associated with meniscal debridement. Return to sport following meniscus injury hinges upon whether it is an isolated injury and how it is treated. If the meniscus injury occurs in isolation and can be treated with a debridement and partial resection alone, there is obviously a quicker return to sport as the player can be weight-bearing immediately following surgery. Return to skating after meniscal debridement and partial resection is usually 4 to 6 weeks, whereas meniscal repair protocols vary depending on surgeon; players may need 3 months to 4 months to return to the ice.

Figure 3. Quadriceps contusion in ice hockey player

Quadriceps contusions are contact injuries that are not unique to ice hockey (Figure 3). They may result from player collision but also from direct blows from a hockey puck. A high velocity puck is known to cause immense trauma to the quadriceps muscles, which may result in localized bleeding and hematoma formation. If the player is able to anticipate the event, active contraction of the quadriceps muscle has been shown to absorb some of the energy and result in a less traumatic injury, but in a fast paced ice hockey game, the player’s anticipation is less likely than in other sports such as baseball.44Interestingly, the degree of knee flexion after injury is predictive of injury severity with milder injuries associated with angles >90 and more severe injuries resulting in knee flexion angles <45° and typically an antalgic gait.45 It is important to treat these injuries during the first 24 hours with the knee maintained in 120°of flexion, plus ice and compression, which can be achieved using a locked knee brace or elastic compression wrap. Quadriceps stretching and isometric strengthening should immediately follow the period of immobilization. The addition of NSAIDs may help prevent the formation of myositis ossificans. A study from West Point suggests that the average return to sport or activity ranges from 13 days (mild contusion) to 21 days (severe contusions), while others8 have indicated that if the injury is treated acutely and a player is able to regain motion and strength, return to ice hockey within a few days is possible.

FOOT AND ANKLE

Ice hockey has some unique injuries that can be attributed to the use of ice skates for play. One such injury is boot-top lacerations, which are fortunately rare as they can be a career-ending injury.47 The spectrum of injury ranges from superficial abrasions to more severe soft tissue disruption, including the extensor tendons and neurovascular structures. The actual mechanism of injury involves an opponent’s skate blade cutting across the anterior ankle. One early case report described a protective method of having players place their skate tongues deep to their protective shin pads, instead of turning the tongues down.47 Kevlar socks have also been shown to help prevent or minimize the damage from a skate blade.48

Injury to the lateral ankle ligaments, anterior talofibular ligament or calcaneofibular ligament, are usually more common than the higher ankle sprains involving the syndesmosis. However, this is not the case in ice hockey. The rigidity of the ice skate at the level of the lateral ligaments seems to impart a protective mechanism to the lower ligaments, but this results in a higher incidence of syndesmotic injuries. These high ankle injuries are unfortunately more debilitating and often require a longer recovery period. In a study of these injuries in NHL players, syndesmotic sprains made up 74% of all ankle sprains, whereas only 18.4% of ankle sprains involved the syndesmosis in American football players..49,50 The average number of days between injury and return to play is 45 days, and some authors believe that defensemen may have a harder time recovering because of the demands on their ankles by having to switch continuously between forward and backward skating.49

Most patients are treated conservatively when their ankle plain radiographs show a congruent mortise and no evidence of syndesmotic widening. If the player expresses pain when squeezing the syndesmosis, it is helpful to obtain stress radiographs to further evaluate for syndesmotic injury. Nonoperative management includes RICE, immobilization in a rigid boot with crutches to protect weight-bearing with gradual advancements and eventually physical therapy to address any ankle stiffness, followed by dynamic functional activities. Treatment options for syndesmotic widening and failed conservative management includes both screw and plate options as well as suture buttons.49,51,52

Figure 4A. Ice hockey player receiving post-game treatment for lace bite.

Ankle and foot fractures were historically a rare injury in ice hockey players based on radiograph evaluation; however, the recent study by Baker and colleagues4 demonstrated that MRI can be helpful in detecting subradiographic fractures. Most of the injuries detected after MRI were from being hit by a hockey puck; this was a novel mechanism that had not been previously reported in the literature.4 Of the injuries that resulted from a direct blow, 14 of 17 occurred on the medial aspect of the foot and ankle, which is believed to result another word? from a defender skating towards an offensive player and attempting to block shots on goal. In this study, all occult fractures involving the medial malleolus were eventually treated with open reduction and internal fixation and underwent routine healing.4 The navicular bone and base of the first metatarsal accounted for the remaining medial-sided fractures. In a recent analysis of risk factors for reoperation following operative fixation of foot fractures across the National Basketball Association, the National Football Leagues, Major League Baseball, and the National Hockey League only a total of 3 fractures involving the foot (1 navicular and 2 first metatarsal) were identified in NHL players over a 30-year period.53 The study acknowledged a major limitation being a public source for identifying players with fractures.

Figure 4B. Bunga pad to help treat an ice hockey player with lace bite. Image courtesy of David Zeis, ATC, Dallas Stars.

Lace bite is another common ice hockey injury. It typically occurs at the beginning of a season or whenever a player is breaking in a new pair of skates. The cause of the lace bite is the rigid tongue in the skate that rubs against the anterior ankle. Skating causes inflammation in the area of the tibialis anterior tendon, and the player will complain of significant anterior ankle pain. First line treatment for lace bite is ice (Figure 4A), NSAID gel (eg, diclofenac 1%), and a Bunga lace-bite pad (Absolute Athletics). (Figure 4B).

SUMMARY

Lower extremity injuries are common in ice hockey players, and a covering physician should be comfortable managing these injuries from breezers to skate. Proper evaluation and work-up is critical for early diagnosis and identification of pathology, which can minimize the impact of the injury and expedite a treatment plan to return the player safely to the ice and in the game.

References

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29. Irshad K, Feldman LS, Lavoie C, Lacroix VJ, Mulder DS, Brown RA. Operative management of "hockey groin syndrome": 12 years of experience in National Hockey League players. Surgery. 2001;130(4):759-764; discussion 764-756.

30. Meyers WC, Foley DP, Garrett WE, Lohnes JH, Mandlebaum BR. Management of severe lower abdominal or inguinal pain in high-performance athletes. PAIN (Performing Athletes with Abdominal or Inguinal Neuromuscular Pain Study Group). Am J Sports Med. 2000;28(1):2-8.

31. Zoga AC, Kavanagh EC, Omar IM, et al. Athletic pubalgia and the "sports hernia": MR imaging findings. Radiology. 2008;247(3):797-807.

32. Jakoi A, O'Neill C, Damsgaard C, Fehring K, Tom J. Sports hernia in National Hockey League players: does surgery affect performance? Am J Sports Med. 2013;41(1):107-110.

33. Larson CM, Pierce BR, Giveans MR. Treatment of athletes with symptomatic intra-articular hip pathology and athletic pubalgia/sports hernia: a case series. Arthroscopy.2011;27(6):768-775.

34. Lorentzon R, Wedren H, Pietila T. Incidence, nature, and causes of ice hockey injuries. A three-year prospective study of a Swedish elite ice hockey team. Am J Sports Med. 1988;16(4):392-396.

35. Holmich P, Uhrskou P, Ulnits L, et al. Effectiveness of active physical training as treatment for long-standing adductor-related groin pain in athletes: randomised trial. Lancet. 1999;353(9151):439-443.

36. Sim FH, Chao EY. Injury potential in modern ice hockey. Am J Sports Med. 1978;6(6):378-384.

37. Tyler TF, Nicholas SJ, Campbell RJ, McHugh MP. The association of hip strength and flexibility with the incidence of adductor muscle strains in professional ice hockey players. Am J Sports Med. 2001;29(2):124-128.

38. LaPrade RF, Wijdicks CA, Griffith CJ. Division I intercollegiate ice hockey team coverage. BrJ Sports Med. 2009;43(13):1000-1005.

39. Grant JA, Bedi A, Kurz J, Bancroft R, Miller BS. Incidence and injury characteristics of medial collateral ligament injuries in male collegiate ice hockey players. Sports Health. 2013;5(3):270-272.

40. Erickson BJ, Harris JD, Cole BJ, et al. Performance and return to sport after anterior cruciate ligament reconstruction in National Hockey League players. Orthop J Sports Med. 2014;2(9):2325967114548831.

41. Sikka R, Kurtenbach C, Steubs JT, Boyd JL, Nelson BJ. Anterior Cruciate Ligament Injuries in Professional Hockey Players. Am J Sports Med. 2016;44(2):378-383.

42. Friden T, Erlandsson T, Zatterstrom R, Lindstrand A, Moritz U. Compression or distraction of the anterior cruciate injured knee: variations in injury pattern in contact sports and downhill skiing. Knee Surg Sports Traumatol Arthrosc. 1995;3(3):144-147.

43. Kluczynski MA, Kang JV, Marzo JM, Bisson LJ. Magnetic resonance imaging and intra-articular findings after anterior cruciate ligament injuries in ice hockey versus other sports. Orthop J Sports Med. 2016;4(5):2325967116646534. 44. Beiner JM, Jokl P. Muscle contusion injuries: current treatment options. J Am Acad Orthop Surg. 2001;9(4):227-237.

45. Jackson DW, Feagin JA. Quadriceps contusions in young athletes. Relation of severity of injury to treatment and prognosis. J Bone Joint Surg Am. 1973;55(1):95-105.

46. Ryan JB, Wheeler JH, Hopkinson WJ, Arciero RA, Kolakowski KR. Quadriceps contusions. West Point update. Am J Sports Med. 1991;19(3):299-304.

47. Johnson PN, Mark; Green, Eric. Boot-top lacerations in ice hockey players: a new injury. Clin J Sports Med. 1991:205-208.

48. Nauth A, Aziz M, Tsuji M, Whalen DB, Theodoropoulos JS, Zdero R. The protective effect of Kevlar socks against hockey skate blade injuries: a biomechanical study. Orthop J Sports Med. 2014;2(Suppl 2):7.

49. Wright RW, Barile RJ, Surprenant DA, Matava MJ. Ankle syndesmosis sprains in national hockey league players. Am J Sports Med. 2004;32(8):1941-1945.

50. Boytim MJ, Fischer DA, Neumann L. Syndesmotic ankle sprains. Am J Sports Med. 1991;19(3):294-298.

51. Marymont JV, Lynch MA, Henning CE. Acute ligamentous diastasis of the ankle without fracture. Evaluation by radionuclide imaging. Am J Sports Med. 1986;14(5):407-409.

52. Miller CD, Shelton WR, Barrett GR, Savoie FH, Dukes AD. Deltoid and syndesmosis ligament injury of the ankle without fracture. Am J Sports Med. 1995;23(6):746-750.

53. Singh SK, Larkin KE, Kadakia AR, Hsu WK. Risk factors for reoperation and performance-based outcomes after operative fixation of foot fractures in the professional athlete: a cross-sport analysis. Sports Health. 2018;10(1):70-74.

54. Larson CM. Sports hernia/athletic pubalgia: evaluation and management. Sports Health. 2014;6(2):139-144.

55. Elattar O, Choi HR, Dills VD, Busconi B. Groin injuries (athletic pubalgia) and return to play. Sports Health. 2016;8(4):313-323.

Author and Disclosure Information

James N. Irvine, Jr. MD, Clinical Fellow, Columbia University, Center for Shoulder, Elbow and Sports Medicine. T. Sean Lynch, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine. Bryan T. Hanypsiak, MD, Attending Physician, Physician’s Regional Medical Center, Naples, Florida. Charles A. Popkin, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine.

Authors’ Disclosure Statement: The authors report no actual or potential conflict of interest in relation to this article.  

Address correspondence to: Charles A. Popkin, MD, Columbia University, Center for Shoulder, Elbow and Sports Medicine, 622 W 168th Street, 11th Floor, New York, New York 10032 (tel: 212-305-4787; email: [email protected]).

Am J Orthop. 2018;47(11). Copyright Frontline Medical Communications Inc. 2018. All rights reserved.

James N. Irvine, Jr, MD T. Sean Lynch, MD Bryan T. Hanypsiak, MDCharles A. Popkin, MD . Lower Extremity Injuries in Ice Hockey: Current Concepts. Am J Orthop. November 27, 2018.

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Author and Disclosure Information

James N. Irvine, Jr. MD, Clinical Fellow, Columbia University, Center for Shoulder, Elbow and Sports Medicine. T. Sean Lynch, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine. Bryan T. Hanypsiak, MD, Attending Physician, Physician’s Regional Medical Center, Naples, Florida. Charles A. Popkin, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine.

Authors’ Disclosure Statement: The authors report no actual or potential conflict of interest in relation to this article.  

Address correspondence to: Charles A. Popkin, MD, Columbia University, Center for Shoulder, Elbow and Sports Medicine, 622 W 168th Street, 11th Floor, New York, New York 10032 (tel: 212-305-4787; email: [email protected]).

Am J Orthop. 2018;47(11). Copyright Frontline Medical Communications Inc. 2018. All rights reserved.

James N. Irvine, Jr, MD T. Sean Lynch, MD Bryan T. Hanypsiak, MDCharles A. Popkin, MD . Lower Extremity Injuries in Ice Hockey: Current Concepts. Am J Orthop. November 27, 2018.

Author and Disclosure Information

James N. Irvine, Jr. MD, Clinical Fellow, Columbia University, Center for Shoulder, Elbow and Sports Medicine. T. Sean Lynch, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine. Bryan T. Hanypsiak, MD, Attending Physician, Physician’s Regional Medical Center, Naples, Florida. Charles A. Popkin, MD, Assistant Professor of Orthopedic Surgery, Columbia University, Center for Shoulder, Elbow and Sports Medicine.

Authors’ Disclosure Statement: The authors report no actual or potential conflict of interest in relation to this article.  

Address correspondence to: Charles A. Popkin, MD, Columbia University, Center for Shoulder, Elbow and Sports Medicine, 622 W 168th Street, 11th Floor, New York, New York 10032 (tel: 212-305-4787; email: [email protected]).

Am J Orthop. 2018;47(11). Copyright Frontline Medical Communications Inc. 2018. All rights reserved.

James N. Irvine, Jr, MD T. Sean Lynch, MD Bryan T. Hanypsiak, MDCharles A. Popkin, MD . Lower Extremity Injuries in Ice Hockey: Current Concepts. Am J Orthop. November 27, 2018.

ABSTRACT

Ice hockey is a fast-paced, collision sport requiring tremendous skill and finesse, yet ice hockey can be a harsh and violent game. It has one of the highest musculoskeletal injury rates in all of competitive sports. Razor sharp skates, aluminum sticks and boards made from high density polyethylene (HDPE), all contribute to the intrinsic hazards of the game. The objective of this article is to review evaluation, management, and return-to-the-rink guidelines after common lower extremity ice hockey injuries.

“Hockey is a fast body-contact game played by men with clubs in their hands and knives laced to their feet, since the skates are razor sharp, and before the evening is over it is almost a certainty that someone will be hurt and will fleck the ice with a generous contribution of gore before he is led away to be hemstitched together again.” —Paul Gallico in Farewell to Sport (1938)

Ice hockey is a collision sport with player speeds in excess of 30 miles/hour, on a sheet of ice surrounded by unforgiving boards, with a vulcanized rubber puck moving at speeds approaching 100 miles/hour.1-3 Understanding injuries specific to this fast-paced sport is an essential part of being a team physician at any level of competitive ice hockey. We are continuing to improve our ability to correctly identify and treat injuries in ice hockey players.2,4 On the prevention side, rule changes in hockey have been implemented, such as raising the age to allow checking and penalties for deliberate hits to the head and checking from behind, to make the game safer to play.3 Additionally, advancements in biomechanical research and 3D modeling are providing new insights into the pathoanatomy of the hip joint, which can be utilized for surgical planning in hockey players and goalies suffering from symptomatic femoroacetabular impingement (FAI) of the hip.5

During the 2010 Winter Olympics, more than 30% of ice hockey players were injured, which was the highest percentage amongst all competing sports.6 They also tallied the highest percentage of player-to-player injuries during the Olympics of any sport. Consequently, the team physician covering ice hockey should be prepared to manage upper and lower extremity musculoskeletal injuries, but also concussions, cervical spine injuries, and ocular and dental trauma.2 

One of the earliest epidemiological studies of ice hockey injuries looked at elite Danish hockey players over 2 seasons and found that head trauma accounted for 28% of all injuries, followed by lower extremity injuries at 27% with upper extremity injuries accounting for 19%.7 More recent epidemiological studies have shown similar rates based on body region while further defining individual diagnoses and their incidence. This should help clinicians and researchers develop prevention strategies, as well as improve treatments to optimize player outcomes and return to sport.8,9 Our group recently reviewed the evaluation and management of common head, neck, and shoulder injuries at all competitive levels of ice hockey, and this article serves to complement the former by focusing on lower extremity injuries (Table).2

Continue to: Hip and groin...

 

 

EVALUATION AND MANAGEMENT OF COMMON LOWER EXTREMITY HOCKEY INJURIES

HIP INJURIES

Hip and groin injuries are very common amongst this group of athletes and account for approximately 9% of all ice hockey injuries.1 Unfortunately, they are also known for their high recurrence rates, which may be in part due to delayed diagnosis, inadequate rest and rehabilitation, as well as the extreme loads that are placed on the hip during competition.10,11 In hockey, the most commonly reported hip injuries include goaltender’s hip, FAI, sports hernia/hockey groin syndrome, adductor strains, hip pointer, and quadriceps contusions. Dalton and colleagues12 performed the largest epidemiological study to date on hip and groin injuries amongst National Collegiate Athletic Association ice hockey players and reported that the most common injury mechanism was noncontact in nature. Contact injuries accounted for 13% (55 of 421) in men’s ice hockey players while less than 4% (4 of 114) injuries in female ice hockey players, which is likely attributed to a no checking rule in the women’s division. Some of these hip and groin injuries are difficult to diagnose so it is important for the team physician to perform a thorough history and physical examination. Advanced imaging (magnetic resonance imaging [MRI] or a computed tomography (CT) scan with 3D reconstructions) may be necessary to make the correct diagnosis. This is important for providing proper treatment as well as setting player expectations for return to sport.12

Table 1. Return-to-Play Guidelines for Common Lower Extremity Ice Hockey Injuries

Lower Extremity Injury

Treatment Options

Return-to-the-Rink Goal

 FAI

In-season: injection, physical therapy program, NSAIDS. Off-season or unable to play: requires arthroscopic surgery

Nonoperative can take up to 6 weeks. Surgical depends on what is fixed but goal is 4 months to return to ice24,26

 

Sports hernia/athletic pubalgia

 

In-season: physical therapy program, NSAIDS

Off-season or unable to play requiring surgery. Essential to make sure no other pathology (eg, FAI, osteitis pubis, adductor strain) to maximize success

 

Nonoperative 6-8 wk trial of physical therapy

Operative: depends if concomitant FAI but in isolation goal is 3-4 mo33,54

 

Adductor strains

Ice, NSAIDS, physical therapy, use of Hypervolt Hyperice

Depends on position (goalie vs skater) and severity; can take up to 4-8 wk to return to ice.

Want 70% strength and painless ROM to skate successfully;55 in chronic cases, may take up to 6 mo35

 

Quadriceps contusion

 

Hinged knee brace to maintain 120° of flexion, ice, compression wrap.

 

When player regains motion and strength, return to ice can be as fast a couple of days or as long as 3 wk8,46

 

 MCL

Hinged knee brace, shin pad modification, ice, NSAIDs

Depends on Grade; if Grade I, 1-2 wk; Grade II, 2-4 wk; Grade III, 4-6 wk8

 

 ACL

Surgery autograft BTB

autograft soft tissue

 

9-10 mo41

Meniscus tear

Depends on type of tear and seasonal timing (in-season or off-season)

If surgical, 3-4 mo; if repair,

4-6 wk if partial menisectomy

 

High ankle sprain

 

Cam boot, NSAIDS, ice and physical therapy

 

6 wk49

Boot top laceration

Repair of cut structures, depends on depth and what is injured; best treatment is prevention with Kevlar socks

If laceration is deep and severs any medial tendons/vascular structures, return to ice can be ≥6 mo

 

Lace bite

 

Bunga pad, ice, diclofenac gel

 

Couple of days to up to 2 wk in recalcitrant cases3

Abbreviations: ACL, anterior cruciate ligament; BTB, bone-patellar tendon-bone; Cam, controlled ankle motion boot; MCL, medial collateral ligament; FAI, femoroacetabular impingement; NSAIDS, nonsteroidal anti-inflammatory drugs; ROM, range of motion.

Throughout the hockey community, FAI is being examined as a possible source of symptomatic hip pain amongst players at all levels. A recent study, which utilized the National Hockey League (NHL) injury surveillance database, reported that FAI accounted for 5.3% of all hip and groin injuries.13 The etiology of FAI is thought to arise from a combination of genetic predisposition coupled with repetitive axial loading/hip flexion. This causes a bony overgrowth of the proximal femoral physes resulting in a cam deformity (Figure 1).5,14 The abnormal bony anatomy allows for impingement between the acetabulum and proximal femur, which can injure the labrum and articular cartilage of the hip joint.

Figure 1. Radiograph AP pelvis of ice hockey goaltender with mixed-type femoroacetabular impingement. His alpha angle of right hip measured 65°; an os acetabuli is present.

In the recent study by Ross and colleagues,15 the authors focused on symptomatic hip impingement in ice hockey goalies.15 Goaltender’s hip may be the result of the “butterfly style,” which is a technique of goaltending that emphasizes guarding the lower part of the goal. The goalie drops to his/her knees and internally rotates the hips to allow the leg pads to be parallel to the ice. This style acquired the name butterfly because of the resemblance of the spread goalie pads to a butterfly’s wings. Bedi and associates16 have evaluated hip biomechanics using 3D-generated bone models and showed in their study that arthroscopic treatment can improve hip kinematics and range of motion.

Plain radiographs showed that 90% (61 of 68) of hockey goalies had an elevated alpha angle signifying a femoral cam-type deformity.15 Goalies had a significantly lower mean lateral center-edge angle (27.3°  vs 29.6°; P = .03) and 13.2% of them were found to have acetabular dysplasia (lateral center-edge angle<20°) compared to only 3% of positional players. The CT scan measurements demonstrated that hockey goalies have a unique cam-type deformity that is located more lateral (1:00 o’clock vs 1:45 o’clock; P < .0001) along the proximal femur, an elevated maximum alpha angle (80.9° vs 68.6°; P < .0001) and loss of offset, when compared to positional players. These findings provide an anatomical basis in support of reports that goaltenders are more likely to experience intra-articular hip injuries compared to other positional players.13

Regardless of position, symptomatic FAI in a hockey player is generally a problem that slowly builds and is made worse with activity.17 On examination, the player may have limited hip flexion and internal rotation, as well as weakness compared to the contralateral side when testing hip flexion and abduction.18,19 Plain radiographs plus MRI or CT allow for proper characterization and diagnosis (to include underlying chondrolabral pathology).20,21

In the young athlete, initial management includes physical therapy, which focuses on core strengthening. Emphasis is placed on hip flexion and extension, as well as abduction and external rotation with the goal of reducing symptoms and avoiding injuries.22 A similar approach may be applied to the elite athlete, but failure of nonoperative management may necessitate surgical intervention. Hip arthroscopy continues to grow in popularity over open surgical dislocation with low complication rate and high return-to-play rate.23-25

For the in-season athlete, attempts to continue to play can be assisted with the role of an intra-articular corticosteroid injection, which can help calm inflammation within the hip joint and mitigate pain, while rehabilitation focuses on core stabilization, postural retraining and focusing on any muscle imbalances that might be present. For positional players, ice time and shift duration can be adjusted to give the player’s hip a period of rest; meanwhile, for goaltenders, shot volumes in practice can be decreased.

Continue to: For athletes who...

 

 

For athletes who fail nonoperative care, surgical treatment varies depending on underlying hip pathology and may include femoroplasty, acetabuloplasty, and microfracture as well as labral repair or debridement. Though data are limited, Philippon and colleagues26 have published promising results in a case series of 28 NHL players after surgical intervention for FAI. All players returned to sport at an average of 3.8 months and players who had surgery within 1 year of injury returned on average 1.1 months sooner than those who waited more than 1 year. Rehabilitation protocol varies between goaltenders compared to defensemen and offensive players due to the different demands required for blocking shots on goal.27

One of the most challenging injuries to correctly identify in the hip area is athletic pubalgia (also referred to as sports hernia or core muscle injury) because pain in the groin may be referred from the lumbar spine, hip joint, urologic, or perineal etiologies.28 Sports hernias involve dilatation of the external ring of the inguinal canal and thinning of the posterior wall. Players may report to the athletic trainer or team physician with a complaint of groin pain that is worse when pushing off with their skate or taking a slap shot.29 On exam, pain can be reproduced by hip extension, contralateral torso rotation, or with a resisted sit-up with palpation of the inferolateral edge of the distal rectus abdominus.30 An MRI with specific sequences centered over the pubic symphysis is usually warranted to aid in the workup of sports hernia. An MRI in these cases may also demonstrate avulsions of the rectus abdominus.31

Most of these injuries are managed conservatively but can warrant surgical intervention if the symptoms persist. In the study by Jakoi and colleagues,32 they identified 43 ice hockey players over an 8-year period (2001-2008) who had repairs of their sports hernias and assessed the statistics during the 2 years prior and 2 years after surgery. The authors found that 80% of these players were able to return to the ice for 2 or more full seasons. The return-to-sport rate was comparable to other sports after sports hernia repair, but players who had played in ≥7 seasons demonstrated a greater decrease in number of games played, goals, assists and time on ice compared to those who had played in ≤6 seasons prior to the time of injury. Between 1989 and 2000, 22 NHL players who failed to respond to nonoperative management of their groin injuries underwent surgical exploration.29 At the time of surgical exploration, their hockey groin syndrome, consisted of small tears in the external oblique aponeurosis through which branches of the ilioinguinal or iliohypogastric could be identified. These surgical procedures were all through a standard inguinal approach and the perforating neurovascular structures were excised, while the main trunk of the ilioinguinal nerve was ablated and the external oblique aponeurosis was repaired and reinforced with Goretex (W.L. Gore & Associates Inc, Flagstaff, AZ). At follow-up, 18 of the 22 players (82%) had no pain and 19 (86%) were able to resume their careers in the NHL.29 Ice hockey players with sports hernias or hockey groin syndrome often return to the sport, but it is important to identify these problems early so that surgical options can be discussed if the player fails conservative management. It is also critical to make sure that all pathology is identified, because in players with mixed sports hernia and FAI, return-to-play results improve when both issues are addressed. In a study of athletes (some of whom were ice hockey players), who had both FAI and sports hernia, and only hernia/pubalgia surgery was performed, 25% of these athletes returned to sport. If only FAI was addressed, 50% of the athletes returned to sport; however, when hernia and FAI were treated, 89% returned to play.33

Adductor strains includes injury to the adductor muscles, pectineus, obturator externus and gracilis, and are prevalent in ice hockey players. A study of elite Swedish ice hockey players published in 1988 reported that adductor strains accounted for 10% (10 of 95) of all injuries.34 Given the prevalence of these injuries, considerable research has been dedicated to understanding their mechanism and prevention.35 Adductor strains within the ice hockey population have been attributed to the eccentric forces on the adductors when players attempt to decelerate the leg during a stride.36 A study of NHL players revealed that a ratio <80% of adductor-to-abductor muscle is the best predictor of a groin strain.37

These injuries are also well known for their recurrence rates, as was the case in an NHL study where 4 of the 9 adductor strains (44%) were recurrent injuries.37 The authors attributed the recurrence to an incomplete rehabilitation program and an accelerated return to sport. This was followed by an NHL prevention program that spanned 2 seasons and analyzed 58 players whose adductor-to-abductor ratio was <80% and placed them into a 6-week intervention program during the preseason.37 Only 3 players sustained an adductor strain in the 2 subsequent seasons after the intervention, compared to 11 strains in the previous 2 seasons. Thus, early identification of muscle strength imbalance coupled with an appropriate intervention program has proven to be an effective means of reducing adductor strains in this at-risk population.

Continue to: Contact injuries may...

 

 

Contact injuries may vary with checking into the boards being unique to men’s ice hockey. Hip pointers occur as a result of a direct compression injury to the iliac crest, which causes trauma to the bone but also to the overlying hip abductor musculature, and represent roughly 2.4% of ice hockey injuries.23 The resulting contusion may cause a local hematoma formation. Early identification of the injury plus treatment with RICE (rest, ice, compression, elevation) coupled with crutches to limit weight-bearing status may minimize soft tissue trauma and swelling, and ultimately aid in pain control and return to sport.38 Hip abductor strengthening, added padding over the injured area, as well as a compressive hip spica wrapping, have all been suggested to expedite return to play and help prevent recurrence of the hip pointer.8

KNEE INJURIES

Injury to the medial collateral ligament (MCL) is the most commonly reported knee injury (Figure 2) and second only to concussion amongst all injuries in National Collegiate Athletic Association ice hockey players.8,39 The mechanism of injury typically involves a valgus force on the knee, which is often caused by collision into another player.39 Valgus stress testing with the knee in 30° of flexion is used to grade the severity of injury (Grade I: 0-5 mm of medial opening; Grade II: 5-10 mm of medial opening; Grade III: >10 mm of medial opening).39 One study that followed a single college hockey team for 8 seasons reported that 77% of injuries (10 of 13) occurred during player-to-player collision,39 with 5 being Grade 1 injuries, 6 Grade 2 injuries, 1 Grade 3; information was missing for 1 player. Nonoperative management of incomplete injuries, grade 1 and 2 sprains, with RICE and early physical therapy intervention to work on knee range of motion and quadriceps strengthening typically helps the player return to sport within days for grade 1 and 2 injuries to 3 weeks for grade 2 injuries. Complete tears have been managed both operatively and nonoperatively with evidence to suggest better outcomes after surgical intervention if there is a concomitant ACL injury requiring reconstruction.8,9

Figure 2. MRI of right knee of 16-year-old defenseman who sustained valgus blow to knee. The medial collateral ligament is torn distally and flipped above pes tendons, a Stener-like lesion.

Anterior cruciate ligament (ACL) tears occur less frequently in hockey players compared to the players in other sports such as football and basketball.38,40 Between 2006 and 2010, 47 players were identified by the NHL Injury Surveillance System as having sustained an ACL injury, which equates to an incidence of 9.4 ACL injuries per NHL season over this time span.41 The mechanism of ACL tears in ice hockey players appears to be different from other sports players based on a recent MRI study that evaluated players for concomitant injuries following ACL tear and noted significantly fewer bone bruises on the lateral femoral condyle compared to players in other sports.42 Early evaluation after injury with Lachman and/or pivot shift tests aids the diagnosis. Data from the NHL study identified 32 players (68%) with concomitant meniscal injuries and 32 (68%) had MCL injuries in conjunction with their ACL tears.41 Average length in the league prior to injury was 5.65 seasons. Twenty-nine of the injured players (61.7%) underwent reconstruction with a patellar tendon autograft, 13 (27.7%) had a hamstring autograft, and 5 (10.6%) had either a patellar tendon or hamstring allograft.41 Meniscus and ACL injuries were associated with a decreased length of career compared to age-matched controls and, notably, players >30 years at the time of injury had only a 67% rate of return to sport whereas those <30 years had a return-to-sport rate of 80%. Players who were able to return did so at an average of 9.8 months (range, 6-21 months) and had a significant reduction in total number of goals, assists, and points scored compared to controls. Decline in performance was typically associated with forwards and wings, while defensemen did not demonstrate the same decrease in performance following return to ice hockey.41

Meniscal tears are a well-documented concomitant injury with ruptures of the ACL, and the combination is a known pattern associated with shorter careers compared to isolated ACL tears in ice hockey players.41 The lateral meniscus is known for increased mobility compared to the medial meniscus and is more commonly injured (39% vs 8.5%) in ACL tears that occur in contact sports and downhill skiing.42 Ice hockey presents a scenario that is different from other contact sports because of the near frictionless interaction between the player’s ice skates and playing surface. This likely equates to a different injury mechanism and dissipation of energy after contact as well as non-contact injuries.38 A recent study reviewed knee MRI findings associated with ACL tears in collegiate ice hockey players and compared to other sports known for their high rates of concomitant meniscal pathology. The authors reported a statistically significant decrease in lateral meniscus tears and bone-bruising patterns in ice hockey players with ACL injuries compared to athletes with ACL tears in other sports.43 In contrast, an NHL study of ACL tears in professional ice hockey players found that 68% of players had concomitant meniscal tears (32 out of 47 players).41

Continue to: The presence of...

 

 

The presence of a meniscal tear on MRI is typically a surgical problem, especially if it occurred with an ACL injury. Meniscal repair is preferable, if possible, because there is a known association of increased cartilage contact pressures associated with meniscal debridement. Return to sport following meniscus injury hinges upon whether it is an isolated injury and how it is treated. If the meniscus injury occurs in isolation and can be treated with a debridement and partial resection alone, there is obviously a quicker return to sport as the player can be weight-bearing immediately following surgery. Return to skating after meniscal debridement and partial resection is usually 4 to 6 weeks, whereas meniscal repair protocols vary depending on surgeon; players may need 3 months to 4 months to return to the ice.

Figure 3. Quadriceps contusion in ice hockey player

Quadriceps contusions are contact injuries that are not unique to ice hockey (Figure 3). They may result from player collision but also from direct blows from a hockey puck. A high velocity puck is known to cause immense trauma to the quadriceps muscles, which may result in localized bleeding and hematoma formation. If the player is able to anticipate the event, active contraction of the quadriceps muscle has been shown to absorb some of the energy and result in a less traumatic injury, but in a fast paced ice hockey game, the player’s anticipation is less likely than in other sports such as baseball.44Interestingly, the degree of knee flexion after injury is predictive of injury severity with milder injuries associated with angles >90 and more severe injuries resulting in knee flexion angles <45° and typically an antalgic gait.45 It is important to treat these injuries during the first 24 hours with the knee maintained in 120°of flexion, plus ice and compression, which can be achieved using a locked knee brace or elastic compression wrap. Quadriceps stretching and isometric strengthening should immediately follow the period of immobilization. The addition of NSAIDs may help prevent the formation of myositis ossificans. A study from West Point suggests that the average return to sport or activity ranges from 13 days (mild contusion) to 21 days (severe contusions), while others8 have indicated that if the injury is treated acutely and a player is able to regain motion and strength, return to ice hockey within a few days is possible.

FOOT AND ANKLE

Ice hockey has some unique injuries that can be attributed to the use of ice skates for play. One such injury is boot-top lacerations, which are fortunately rare as they can be a career-ending injury.47 The spectrum of injury ranges from superficial abrasions to more severe soft tissue disruption, including the extensor tendons and neurovascular structures. The actual mechanism of injury involves an opponent’s skate blade cutting across the anterior ankle. One early case report described a protective method of having players place their skate tongues deep to their protective shin pads, instead of turning the tongues down.47 Kevlar socks have also been shown to help prevent or minimize the damage from a skate blade.48

Injury to the lateral ankle ligaments, anterior talofibular ligament or calcaneofibular ligament, are usually more common than the higher ankle sprains involving the syndesmosis. However, this is not the case in ice hockey. The rigidity of the ice skate at the level of the lateral ligaments seems to impart a protective mechanism to the lower ligaments, but this results in a higher incidence of syndesmotic injuries. These high ankle injuries are unfortunately more debilitating and often require a longer recovery period. In a study of these injuries in NHL players, syndesmotic sprains made up 74% of all ankle sprains, whereas only 18.4% of ankle sprains involved the syndesmosis in American football players..49,50 The average number of days between injury and return to play is 45 days, and some authors believe that defensemen may have a harder time recovering because of the demands on their ankles by having to switch continuously between forward and backward skating.49

Most patients are treated conservatively when their ankle plain radiographs show a congruent mortise and no evidence of syndesmotic widening. If the player expresses pain when squeezing the syndesmosis, it is helpful to obtain stress radiographs to further evaluate for syndesmotic injury. Nonoperative management includes RICE, immobilization in a rigid boot with crutches to protect weight-bearing with gradual advancements and eventually physical therapy to address any ankle stiffness, followed by dynamic functional activities. Treatment options for syndesmotic widening and failed conservative management includes both screw and plate options as well as suture buttons.49,51,52

Figure 4A. Ice hockey player receiving post-game treatment for lace bite.

Ankle and foot fractures were historically a rare injury in ice hockey players based on radiograph evaluation; however, the recent study by Baker and colleagues4 demonstrated that MRI can be helpful in detecting subradiographic fractures. Most of the injuries detected after MRI were from being hit by a hockey puck; this was a novel mechanism that had not been previously reported in the literature.4 Of the injuries that resulted from a direct blow, 14 of 17 occurred on the medial aspect of the foot and ankle, which is believed to result another word? from a defender skating towards an offensive player and attempting to block shots on goal. In this study, all occult fractures involving the medial malleolus were eventually treated with open reduction and internal fixation and underwent routine healing.4 The navicular bone and base of the first metatarsal accounted for the remaining medial-sided fractures. In a recent analysis of risk factors for reoperation following operative fixation of foot fractures across the National Basketball Association, the National Football Leagues, Major League Baseball, and the National Hockey League only a total of 3 fractures involving the foot (1 navicular and 2 first metatarsal) were identified in NHL players over a 30-year period.53 The study acknowledged a major limitation being a public source for identifying players with fractures.

Figure 4B. Bunga pad to help treat an ice hockey player with lace bite. Image courtesy of David Zeis, ATC, Dallas Stars.

Lace bite is another common ice hockey injury. It typically occurs at the beginning of a season or whenever a player is breaking in a new pair of skates. The cause of the lace bite is the rigid tongue in the skate that rubs against the anterior ankle. Skating causes inflammation in the area of the tibialis anterior tendon, and the player will complain of significant anterior ankle pain. First line treatment for lace bite is ice (Figure 4A), NSAID gel (eg, diclofenac 1%), and a Bunga lace-bite pad (Absolute Athletics). (Figure 4B).

SUMMARY

Lower extremity injuries are common in ice hockey players, and a covering physician should be comfortable managing these injuries from breezers to skate. Proper evaluation and work-up is critical for early diagnosis and identification of pathology, which can minimize the impact of the injury and expedite a treatment plan to return the player safely to the ice and in the game.

ABSTRACT

Ice hockey is a fast-paced, collision sport requiring tremendous skill and finesse, yet ice hockey can be a harsh and violent game. It has one of the highest musculoskeletal injury rates in all of competitive sports. Razor sharp skates, aluminum sticks and boards made from high density polyethylene (HDPE), all contribute to the intrinsic hazards of the game. The objective of this article is to review evaluation, management, and return-to-the-rink guidelines after common lower extremity ice hockey injuries.

“Hockey is a fast body-contact game played by men with clubs in their hands and knives laced to their feet, since the skates are razor sharp, and before the evening is over it is almost a certainty that someone will be hurt and will fleck the ice with a generous contribution of gore before he is led away to be hemstitched together again.” —Paul Gallico in Farewell to Sport (1938)

Ice hockey is a collision sport with player speeds in excess of 30 miles/hour, on a sheet of ice surrounded by unforgiving boards, with a vulcanized rubber puck moving at speeds approaching 100 miles/hour.1-3 Understanding injuries specific to this fast-paced sport is an essential part of being a team physician at any level of competitive ice hockey. We are continuing to improve our ability to correctly identify and treat injuries in ice hockey players.2,4 On the prevention side, rule changes in hockey have been implemented, such as raising the age to allow checking and penalties for deliberate hits to the head and checking from behind, to make the game safer to play.3 Additionally, advancements in biomechanical research and 3D modeling are providing new insights into the pathoanatomy of the hip joint, which can be utilized for surgical planning in hockey players and goalies suffering from symptomatic femoroacetabular impingement (FAI) of the hip.5

During the 2010 Winter Olympics, more than 30% of ice hockey players were injured, which was the highest percentage amongst all competing sports.6 They also tallied the highest percentage of player-to-player injuries during the Olympics of any sport. Consequently, the team physician covering ice hockey should be prepared to manage upper and lower extremity musculoskeletal injuries, but also concussions, cervical spine injuries, and ocular and dental trauma.2 

One of the earliest epidemiological studies of ice hockey injuries looked at elite Danish hockey players over 2 seasons and found that head trauma accounted for 28% of all injuries, followed by lower extremity injuries at 27% with upper extremity injuries accounting for 19%.7 More recent epidemiological studies have shown similar rates based on body region while further defining individual diagnoses and their incidence. This should help clinicians and researchers develop prevention strategies, as well as improve treatments to optimize player outcomes and return to sport.8,9 Our group recently reviewed the evaluation and management of common head, neck, and shoulder injuries at all competitive levels of ice hockey, and this article serves to complement the former by focusing on lower extremity injuries (Table).2

Continue to: Hip and groin...

 

 

EVALUATION AND MANAGEMENT OF COMMON LOWER EXTREMITY HOCKEY INJURIES

HIP INJURIES

Hip and groin injuries are very common amongst this group of athletes and account for approximately 9% of all ice hockey injuries.1 Unfortunately, they are also known for their high recurrence rates, which may be in part due to delayed diagnosis, inadequate rest and rehabilitation, as well as the extreme loads that are placed on the hip during competition.10,11 In hockey, the most commonly reported hip injuries include goaltender’s hip, FAI, sports hernia/hockey groin syndrome, adductor strains, hip pointer, and quadriceps contusions. Dalton and colleagues12 performed the largest epidemiological study to date on hip and groin injuries amongst National Collegiate Athletic Association ice hockey players and reported that the most common injury mechanism was noncontact in nature. Contact injuries accounted for 13% (55 of 421) in men’s ice hockey players while less than 4% (4 of 114) injuries in female ice hockey players, which is likely attributed to a no checking rule in the women’s division. Some of these hip and groin injuries are difficult to diagnose so it is important for the team physician to perform a thorough history and physical examination. Advanced imaging (magnetic resonance imaging [MRI] or a computed tomography (CT) scan with 3D reconstructions) may be necessary to make the correct diagnosis. This is important for providing proper treatment as well as setting player expectations for return to sport.12

Table 1. Return-to-Play Guidelines for Common Lower Extremity Ice Hockey Injuries

Lower Extremity Injury

Treatment Options

Return-to-the-Rink Goal

 FAI

In-season: injection, physical therapy program, NSAIDS. Off-season or unable to play: requires arthroscopic surgery

Nonoperative can take up to 6 weeks. Surgical depends on what is fixed but goal is 4 months to return to ice24,26

 

Sports hernia/athletic pubalgia

 

In-season: physical therapy program, NSAIDS

Off-season or unable to play requiring surgery. Essential to make sure no other pathology (eg, FAI, osteitis pubis, adductor strain) to maximize success

 

Nonoperative 6-8 wk trial of physical therapy

Operative: depends if concomitant FAI but in isolation goal is 3-4 mo33,54

 

Adductor strains

Ice, NSAIDS, physical therapy, use of Hypervolt Hyperice

Depends on position (goalie vs skater) and severity; can take up to 4-8 wk to return to ice.

Want 70% strength and painless ROM to skate successfully;55 in chronic cases, may take up to 6 mo35

 

Quadriceps contusion

 

Hinged knee brace to maintain 120° of flexion, ice, compression wrap.

 

When player regains motion and strength, return to ice can be as fast a couple of days or as long as 3 wk8,46

 

 MCL

Hinged knee brace, shin pad modification, ice, NSAIDs

Depends on Grade; if Grade I, 1-2 wk; Grade II, 2-4 wk; Grade III, 4-6 wk8

 

 ACL

Surgery autograft BTB

autograft soft tissue

 

9-10 mo41

Meniscus tear

Depends on type of tear and seasonal timing (in-season or off-season)

If surgical, 3-4 mo; if repair,

4-6 wk if partial menisectomy

 

High ankle sprain

 

Cam boot, NSAIDS, ice and physical therapy

 

6 wk49

Boot top laceration

Repair of cut structures, depends on depth and what is injured; best treatment is prevention with Kevlar socks

If laceration is deep and severs any medial tendons/vascular structures, return to ice can be ≥6 mo

 

Lace bite

 

Bunga pad, ice, diclofenac gel

 

Couple of days to up to 2 wk in recalcitrant cases3

Abbreviations: ACL, anterior cruciate ligament; BTB, bone-patellar tendon-bone; Cam, controlled ankle motion boot; MCL, medial collateral ligament; FAI, femoroacetabular impingement; NSAIDS, nonsteroidal anti-inflammatory drugs; ROM, range of motion.

Throughout the hockey community, FAI is being examined as a possible source of symptomatic hip pain amongst players at all levels. A recent study, which utilized the National Hockey League (NHL) injury surveillance database, reported that FAI accounted for 5.3% of all hip and groin injuries.13 The etiology of FAI is thought to arise from a combination of genetic predisposition coupled with repetitive axial loading/hip flexion. This causes a bony overgrowth of the proximal femoral physes resulting in a cam deformity (Figure 1).5,14 The abnormal bony anatomy allows for impingement between the acetabulum and proximal femur, which can injure the labrum and articular cartilage of the hip joint.

Figure 1. Radiograph AP pelvis of ice hockey goaltender with mixed-type femoroacetabular impingement. His alpha angle of right hip measured 65°; an os acetabuli is present.

In the recent study by Ross and colleagues,15 the authors focused on symptomatic hip impingement in ice hockey goalies.15 Goaltender’s hip may be the result of the “butterfly style,” which is a technique of goaltending that emphasizes guarding the lower part of the goal. The goalie drops to his/her knees and internally rotates the hips to allow the leg pads to be parallel to the ice. This style acquired the name butterfly because of the resemblance of the spread goalie pads to a butterfly’s wings. Bedi and associates16 have evaluated hip biomechanics using 3D-generated bone models and showed in their study that arthroscopic treatment can improve hip kinematics and range of motion.

Plain radiographs showed that 90% (61 of 68) of hockey goalies had an elevated alpha angle signifying a femoral cam-type deformity.15 Goalies had a significantly lower mean lateral center-edge angle (27.3°  vs 29.6°; P = .03) and 13.2% of them were found to have acetabular dysplasia (lateral center-edge angle<20°) compared to only 3% of positional players. The CT scan measurements demonstrated that hockey goalies have a unique cam-type deformity that is located more lateral (1:00 o’clock vs 1:45 o’clock; P < .0001) along the proximal femur, an elevated maximum alpha angle (80.9° vs 68.6°; P < .0001) and loss of offset, when compared to positional players. These findings provide an anatomical basis in support of reports that goaltenders are more likely to experience intra-articular hip injuries compared to other positional players.13

Regardless of position, symptomatic FAI in a hockey player is generally a problem that slowly builds and is made worse with activity.17 On examination, the player may have limited hip flexion and internal rotation, as well as weakness compared to the contralateral side when testing hip flexion and abduction.18,19 Plain radiographs plus MRI or CT allow for proper characterization and diagnosis (to include underlying chondrolabral pathology).20,21

In the young athlete, initial management includes physical therapy, which focuses on core strengthening. Emphasis is placed on hip flexion and extension, as well as abduction and external rotation with the goal of reducing symptoms and avoiding injuries.22 A similar approach may be applied to the elite athlete, but failure of nonoperative management may necessitate surgical intervention. Hip arthroscopy continues to grow in popularity over open surgical dislocation with low complication rate and high return-to-play rate.23-25

For the in-season athlete, attempts to continue to play can be assisted with the role of an intra-articular corticosteroid injection, which can help calm inflammation within the hip joint and mitigate pain, while rehabilitation focuses on core stabilization, postural retraining and focusing on any muscle imbalances that might be present. For positional players, ice time and shift duration can be adjusted to give the player’s hip a period of rest; meanwhile, for goaltenders, shot volumes in practice can be decreased.

Continue to: For athletes who...

 

 

For athletes who fail nonoperative care, surgical treatment varies depending on underlying hip pathology and may include femoroplasty, acetabuloplasty, and microfracture as well as labral repair or debridement. Though data are limited, Philippon and colleagues26 have published promising results in a case series of 28 NHL players after surgical intervention for FAI. All players returned to sport at an average of 3.8 months and players who had surgery within 1 year of injury returned on average 1.1 months sooner than those who waited more than 1 year. Rehabilitation protocol varies between goaltenders compared to defensemen and offensive players due to the different demands required for blocking shots on goal.27

One of the most challenging injuries to correctly identify in the hip area is athletic pubalgia (also referred to as sports hernia or core muscle injury) because pain in the groin may be referred from the lumbar spine, hip joint, urologic, or perineal etiologies.28 Sports hernias involve dilatation of the external ring of the inguinal canal and thinning of the posterior wall. Players may report to the athletic trainer or team physician with a complaint of groin pain that is worse when pushing off with their skate or taking a slap shot.29 On exam, pain can be reproduced by hip extension, contralateral torso rotation, or with a resisted sit-up with palpation of the inferolateral edge of the distal rectus abdominus.30 An MRI with specific sequences centered over the pubic symphysis is usually warranted to aid in the workup of sports hernia. An MRI in these cases may also demonstrate avulsions of the rectus abdominus.31

Most of these injuries are managed conservatively but can warrant surgical intervention if the symptoms persist. In the study by Jakoi and colleagues,32 they identified 43 ice hockey players over an 8-year period (2001-2008) who had repairs of their sports hernias and assessed the statistics during the 2 years prior and 2 years after surgery. The authors found that 80% of these players were able to return to the ice for 2 or more full seasons. The return-to-sport rate was comparable to other sports after sports hernia repair, but players who had played in ≥7 seasons demonstrated a greater decrease in number of games played, goals, assists and time on ice compared to those who had played in ≤6 seasons prior to the time of injury. Between 1989 and 2000, 22 NHL players who failed to respond to nonoperative management of their groin injuries underwent surgical exploration.29 At the time of surgical exploration, their hockey groin syndrome, consisted of small tears in the external oblique aponeurosis through which branches of the ilioinguinal or iliohypogastric could be identified. These surgical procedures were all through a standard inguinal approach and the perforating neurovascular structures were excised, while the main trunk of the ilioinguinal nerve was ablated and the external oblique aponeurosis was repaired and reinforced with Goretex (W.L. Gore & Associates Inc, Flagstaff, AZ). At follow-up, 18 of the 22 players (82%) had no pain and 19 (86%) were able to resume their careers in the NHL.29 Ice hockey players with sports hernias or hockey groin syndrome often return to the sport, but it is important to identify these problems early so that surgical options can be discussed if the player fails conservative management. It is also critical to make sure that all pathology is identified, because in players with mixed sports hernia and FAI, return-to-play results improve when both issues are addressed. In a study of athletes (some of whom were ice hockey players), who had both FAI and sports hernia, and only hernia/pubalgia surgery was performed, 25% of these athletes returned to sport. If only FAI was addressed, 50% of the athletes returned to sport; however, when hernia and FAI were treated, 89% returned to play.33

Adductor strains includes injury to the adductor muscles, pectineus, obturator externus and gracilis, and are prevalent in ice hockey players. A study of elite Swedish ice hockey players published in 1988 reported that adductor strains accounted for 10% (10 of 95) of all injuries.34 Given the prevalence of these injuries, considerable research has been dedicated to understanding their mechanism and prevention.35 Adductor strains within the ice hockey population have been attributed to the eccentric forces on the adductors when players attempt to decelerate the leg during a stride.36 A study of NHL players revealed that a ratio <80% of adductor-to-abductor muscle is the best predictor of a groin strain.37

These injuries are also well known for their recurrence rates, as was the case in an NHL study where 4 of the 9 adductor strains (44%) were recurrent injuries.37 The authors attributed the recurrence to an incomplete rehabilitation program and an accelerated return to sport. This was followed by an NHL prevention program that spanned 2 seasons and analyzed 58 players whose adductor-to-abductor ratio was <80% and placed them into a 6-week intervention program during the preseason.37 Only 3 players sustained an adductor strain in the 2 subsequent seasons after the intervention, compared to 11 strains in the previous 2 seasons. Thus, early identification of muscle strength imbalance coupled with an appropriate intervention program has proven to be an effective means of reducing adductor strains in this at-risk population.

Continue to: Contact injuries may...

 

 

Contact injuries may vary with checking into the boards being unique to men’s ice hockey. Hip pointers occur as a result of a direct compression injury to the iliac crest, which causes trauma to the bone but also to the overlying hip abductor musculature, and represent roughly 2.4% of ice hockey injuries.23 The resulting contusion may cause a local hematoma formation. Early identification of the injury plus treatment with RICE (rest, ice, compression, elevation) coupled with crutches to limit weight-bearing status may minimize soft tissue trauma and swelling, and ultimately aid in pain control and return to sport.38 Hip abductor strengthening, added padding over the injured area, as well as a compressive hip spica wrapping, have all been suggested to expedite return to play and help prevent recurrence of the hip pointer.8

KNEE INJURIES

Injury to the medial collateral ligament (MCL) is the most commonly reported knee injury (Figure 2) and second only to concussion amongst all injuries in National Collegiate Athletic Association ice hockey players.8,39 The mechanism of injury typically involves a valgus force on the knee, which is often caused by collision into another player.39 Valgus stress testing with the knee in 30° of flexion is used to grade the severity of injury (Grade I: 0-5 mm of medial opening; Grade II: 5-10 mm of medial opening; Grade III: >10 mm of medial opening).39 One study that followed a single college hockey team for 8 seasons reported that 77% of injuries (10 of 13) occurred during player-to-player collision,39 with 5 being Grade 1 injuries, 6 Grade 2 injuries, 1 Grade 3; information was missing for 1 player. Nonoperative management of incomplete injuries, grade 1 and 2 sprains, with RICE and early physical therapy intervention to work on knee range of motion and quadriceps strengthening typically helps the player return to sport within days for grade 1 and 2 injuries to 3 weeks for grade 2 injuries. Complete tears have been managed both operatively and nonoperatively with evidence to suggest better outcomes after surgical intervention if there is a concomitant ACL injury requiring reconstruction.8,9

Figure 2. MRI of right knee of 16-year-old defenseman who sustained valgus blow to knee. The medial collateral ligament is torn distally and flipped above pes tendons, a Stener-like lesion.

Anterior cruciate ligament (ACL) tears occur less frequently in hockey players compared to the players in other sports such as football and basketball.38,40 Between 2006 and 2010, 47 players were identified by the NHL Injury Surveillance System as having sustained an ACL injury, which equates to an incidence of 9.4 ACL injuries per NHL season over this time span.41 The mechanism of ACL tears in ice hockey players appears to be different from other sports players based on a recent MRI study that evaluated players for concomitant injuries following ACL tear and noted significantly fewer bone bruises on the lateral femoral condyle compared to players in other sports.42 Early evaluation after injury with Lachman and/or pivot shift tests aids the diagnosis. Data from the NHL study identified 32 players (68%) with concomitant meniscal injuries and 32 (68%) had MCL injuries in conjunction with their ACL tears.41 Average length in the league prior to injury was 5.65 seasons. Twenty-nine of the injured players (61.7%) underwent reconstruction with a patellar tendon autograft, 13 (27.7%) had a hamstring autograft, and 5 (10.6%) had either a patellar tendon or hamstring allograft.41 Meniscus and ACL injuries were associated with a decreased length of career compared to age-matched controls and, notably, players >30 years at the time of injury had only a 67% rate of return to sport whereas those <30 years had a return-to-sport rate of 80%. Players who were able to return did so at an average of 9.8 months (range, 6-21 months) and had a significant reduction in total number of goals, assists, and points scored compared to controls. Decline in performance was typically associated with forwards and wings, while defensemen did not demonstrate the same decrease in performance following return to ice hockey.41

Meniscal tears are a well-documented concomitant injury with ruptures of the ACL, and the combination is a known pattern associated with shorter careers compared to isolated ACL tears in ice hockey players.41 The lateral meniscus is known for increased mobility compared to the medial meniscus and is more commonly injured (39% vs 8.5%) in ACL tears that occur in contact sports and downhill skiing.42 Ice hockey presents a scenario that is different from other contact sports because of the near frictionless interaction between the player’s ice skates and playing surface. This likely equates to a different injury mechanism and dissipation of energy after contact as well as non-contact injuries.38 A recent study reviewed knee MRI findings associated with ACL tears in collegiate ice hockey players and compared to other sports known for their high rates of concomitant meniscal pathology. The authors reported a statistically significant decrease in lateral meniscus tears and bone-bruising patterns in ice hockey players with ACL injuries compared to athletes with ACL tears in other sports.43 In contrast, an NHL study of ACL tears in professional ice hockey players found that 68% of players had concomitant meniscal tears (32 out of 47 players).41

Continue to: The presence of...

 

 

The presence of a meniscal tear on MRI is typically a surgical problem, especially if it occurred with an ACL injury. Meniscal repair is preferable, if possible, because there is a known association of increased cartilage contact pressures associated with meniscal debridement. Return to sport following meniscus injury hinges upon whether it is an isolated injury and how it is treated. If the meniscus injury occurs in isolation and can be treated with a debridement and partial resection alone, there is obviously a quicker return to sport as the player can be weight-bearing immediately following surgery. Return to skating after meniscal debridement and partial resection is usually 4 to 6 weeks, whereas meniscal repair protocols vary depending on surgeon; players may need 3 months to 4 months to return to the ice.

Figure 3. Quadriceps contusion in ice hockey player

Quadriceps contusions are contact injuries that are not unique to ice hockey (Figure 3). They may result from player collision but also from direct blows from a hockey puck. A high velocity puck is known to cause immense trauma to the quadriceps muscles, which may result in localized bleeding and hematoma formation. If the player is able to anticipate the event, active contraction of the quadriceps muscle has been shown to absorb some of the energy and result in a less traumatic injury, but in a fast paced ice hockey game, the player’s anticipation is less likely than in other sports such as baseball.44Interestingly, the degree of knee flexion after injury is predictive of injury severity with milder injuries associated with angles >90 and more severe injuries resulting in knee flexion angles <45° and typically an antalgic gait.45 It is important to treat these injuries during the first 24 hours with the knee maintained in 120°of flexion, plus ice and compression, which can be achieved using a locked knee brace or elastic compression wrap. Quadriceps stretching and isometric strengthening should immediately follow the period of immobilization. The addition of NSAIDs may help prevent the formation of myositis ossificans. A study from West Point suggests that the average return to sport or activity ranges from 13 days (mild contusion) to 21 days (severe contusions), while others8 have indicated that if the injury is treated acutely and a player is able to regain motion and strength, return to ice hockey within a few days is possible.

FOOT AND ANKLE

Ice hockey has some unique injuries that can be attributed to the use of ice skates for play. One such injury is boot-top lacerations, which are fortunately rare as they can be a career-ending injury.47 The spectrum of injury ranges from superficial abrasions to more severe soft tissue disruption, including the extensor tendons and neurovascular structures. The actual mechanism of injury involves an opponent’s skate blade cutting across the anterior ankle. One early case report described a protective method of having players place their skate tongues deep to their protective shin pads, instead of turning the tongues down.47 Kevlar socks have also been shown to help prevent or minimize the damage from a skate blade.48

Injury to the lateral ankle ligaments, anterior talofibular ligament or calcaneofibular ligament, are usually more common than the higher ankle sprains involving the syndesmosis. However, this is not the case in ice hockey. The rigidity of the ice skate at the level of the lateral ligaments seems to impart a protective mechanism to the lower ligaments, but this results in a higher incidence of syndesmotic injuries. These high ankle injuries are unfortunately more debilitating and often require a longer recovery period. In a study of these injuries in NHL players, syndesmotic sprains made up 74% of all ankle sprains, whereas only 18.4% of ankle sprains involved the syndesmosis in American football players..49,50 The average number of days between injury and return to play is 45 days, and some authors believe that defensemen may have a harder time recovering because of the demands on their ankles by having to switch continuously between forward and backward skating.49

Most patients are treated conservatively when their ankle plain radiographs show a congruent mortise and no evidence of syndesmotic widening. If the player expresses pain when squeezing the syndesmosis, it is helpful to obtain stress radiographs to further evaluate for syndesmotic injury. Nonoperative management includes RICE, immobilization in a rigid boot with crutches to protect weight-bearing with gradual advancements and eventually physical therapy to address any ankle stiffness, followed by dynamic functional activities. Treatment options for syndesmotic widening and failed conservative management includes both screw and plate options as well as suture buttons.49,51,52

Figure 4A. Ice hockey player receiving post-game treatment for lace bite.

Ankle and foot fractures were historically a rare injury in ice hockey players based on radiograph evaluation; however, the recent study by Baker and colleagues4 demonstrated that MRI can be helpful in detecting subradiographic fractures. Most of the injuries detected after MRI were from being hit by a hockey puck; this was a novel mechanism that had not been previously reported in the literature.4 Of the injuries that resulted from a direct blow, 14 of 17 occurred on the medial aspect of the foot and ankle, which is believed to result another word? from a defender skating towards an offensive player and attempting to block shots on goal. In this study, all occult fractures involving the medial malleolus were eventually treated with open reduction and internal fixation and underwent routine healing.4 The navicular bone and base of the first metatarsal accounted for the remaining medial-sided fractures. In a recent analysis of risk factors for reoperation following operative fixation of foot fractures across the National Basketball Association, the National Football Leagues, Major League Baseball, and the National Hockey League only a total of 3 fractures involving the foot (1 navicular and 2 first metatarsal) were identified in NHL players over a 30-year period.53 The study acknowledged a major limitation being a public source for identifying players with fractures.

Figure 4B. Bunga pad to help treat an ice hockey player with lace bite. Image courtesy of David Zeis, ATC, Dallas Stars.

Lace bite is another common ice hockey injury. It typically occurs at the beginning of a season or whenever a player is breaking in a new pair of skates. The cause of the lace bite is the rigid tongue in the skate that rubs against the anterior ankle. Skating causes inflammation in the area of the tibialis anterior tendon, and the player will complain of significant anterior ankle pain. First line treatment for lace bite is ice (Figure 4A), NSAID gel (eg, diclofenac 1%), and a Bunga lace-bite pad (Absolute Athletics). (Figure 4B).

SUMMARY

Lower extremity injuries are common in ice hockey players, and a covering physician should be comfortable managing these injuries from breezers to skate. Proper evaluation and work-up is critical for early diagnosis and identification of pathology, which can minimize the impact of the injury and expedite a treatment plan to return the player safely to the ice and in the game.

References

1. Flik K, Lyman S, Marx RG. American collegiate men's ice hockey: an analysis of injuries. Am J Sports Med. 2005;33(2):183-187.

2. Popkin CA, Nelson BJ, Park CN, et al. Head, neck, and shoulder injuries in ice hockey: current concepts. Am J Orthop (Belle Mead NJ). 2017;46(3):123-134.

3. Popkin CA, Schulz BM, Park CN, Bottiglieri TS, Lynch TS. Evaluation, management and prevention of lower extremity youth ice hockey injuries. Open Access J Sports Med. 534 2016;7:167-176.

4. Baker JC, Hoover EG, Hillen TJ, Smith MV, Wright RW, Rubin DA. Subradiographic foot and ankle fractures and bone contusions detected by MRI in elite ice hockey players. Am J Sports Med. 2016;44(5):1317-1323.

5. Philippon MJ, Ho CP, Briggs KK, Stull J, LaPrade RF. Prevalence of increased alpha angles as a measure of cam-type femoroacetabular impingement in youth ice hockey players. Am J Sports Med. 2013;41(6):1357-1362.

6. Engebretsen L, Steffen K, Alonso JM, et al. Sports injuries and illnesses during the Winter Olympic Games 2010. Br J Sports Med. 2010;44(11):772-780.

7. Jorgensen U, Schmidt-Olsen S. The epidemiology of ice hockey injuries. Br J Sports Med. 1986;20(1):7-9.

8. Laprade RF, Surowiec RK, Sochanska AN, et al. Epidemiology, identification, treatment and return to play of musculoskeletal-based ice hockey injuries. BrJ Sports Med. 2014;48(1):4-10.

9. Mosenthal W, Kim M, Holzshu R, Hanypsiak B, Athiviraham A. Common ice hockey injuries and treatment: a current concepts review. Curr Sports Med Rep. 2017;16(5):357-362.

10. Tyler TF, Silvers HJ, Gerhardt MB, Nicholas SJ. Groin injuries in sports medicine. Sports Health. 2010;2(3):231-236.

11. Anderson K, Strickland SM, Warren R. Hip and groin injuries in athletes. Am J Sports Med. 2001;29(4):521-533.

12. Dalton SL, Zupon AB, Gardner EC, Djoko A, Dompier TP, Kerr ZY. The epidemiology of hip/groin injuries in National Collegiate Athletic Association men's and women's ice hockey: 2009-2010 through 2014-2015 academic years. Orthop J Sports Med. 2016;4(3):2325967116632692.

13. Epstein DM, McHugh M, Yorio M, Neri B. Intra-articular hip injuries in national hockey league players: a descriptive epidemiological study. Am J Sports Med. 2013;41(2):343-348.

14. Nepple JJ, Vigdorchik JM, Clohisy JC. What is the association between sports participation and the development of proximal femoral cam deformity? A systematic review and meta-analysis. Am J Sports Med. 2015;43(11):2833-2840.

15. Ross JR, Bedi A, Stone RM, Sibilsky Enselman E, Kelly BT, Larson CM. Characterization of symptomatic hip impingement in butterfly ice hockey goalies. Arthroscopy. 2015;31(4):635-642.

16. Bedi A, Dolan M, Hetsroni I, et al. Surgical treatment of femoroacetabular impingement improves hip kinematics: a computer-assisted model. Am J Sports Med. 2011;39(Suppl):43S-49S.

17. Clohisy JC, Knaus ER, Hunt DM, Lesher JM, Harris-Hayes M, Prather H. Clinical presentation of patients with symptomatic anterior hip impingement. Clin Orthop Relat Res. 2009;467(3):638-644.

18. Nepple JJ, Goljan P, Briggs KK, Garvey SE, Ryan M, Philippon MJ. Hip strength deficits in patients with symptomatic femoroacetabular impingement and labral ears. Arthroscopy. 2015;31(11):2106-2111.

19. Audenaert EA, Peeters I, Vigneron L, Baelde N, Pattyn C. Hip morphological characteristics and range of internal rotation in femoroacetabular impingement. Am J Sports Med. 2012;40(6):1329-1336.

20. Notzli HP, Wyss TF, Stoecklin CH, Schmid MR, Treiber K, Hodler J. The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement. J Bone Joint Surg Br. 2002;84(4):556-560.

21. Kuhn AW, Ross JR, Bedi A. Three-dimensional imaging and computer navigation in planning for hip preservation surgery. Sports Med Arthrosc Rev. 2015;23(4):e31-e38.

22. Wall PD, Fernandez M, Griffin DR, Foster NE. Nonoperative treatment for femoroacetabular impingement: a systematic review of the literature. PM R. 2013;5(5):418-426.

23. Kuhn AW, Noonan BC, Kelly BT, Larson CM, Bedi A. The hip in ice hockey: a current concepts review. Arthroscopy. 2016;32(9):1928-1938.

24. O'Connor M, Minkara AA, Westermann RW, Rosneck J, Lynch TS. Return to play after hip arthroscopy: a systematic review and meta-analysis. Am J Sports Med. 2018:46(11):2780-2788.

25. Minkara AA, Westermann RW, Rosneck J, Lynch TS. Systematic review and meta-analysis of outcomes after hip arthroscopy in femoroacetabular impingement. Am J Sports Med. 2018:363546517749475.

26. Philippon MJ, Weiss DR, Kuppersmith DA, Briggs KK, Hay CJ. Arthroscopic labral repair and treatment of femoroacetabular impingement in professional hockey players. Am J Sports Med. 2010;38(1):99-104.

27. Pierce CM, Laprade RF, Wahoff M, O'Brien L, Philippon MJ. Ice hockey goaltender rehabilitation, including on-ice progression, after arthroscopic hip surgery for femoroacetabular impingement. J Orthop Sports Phys Ther. 2013;43(3):129-141.

28. MacLeod DA, Gibbon WW. The sportsman's groin. Br J Surg. 1999;86(7):849-850.

29. Irshad K, Feldman LS, Lavoie C, Lacroix VJ, Mulder DS, Brown RA. Operative management of "hockey groin syndrome": 12 years of experience in National Hockey League players. Surgery. 2001;130(4):759-764; discussion 764-756.

30. Meyers WC, Foley DP, Garrett WE, Lohnes JH, Mandlebaum BR. Management of severe lower abdominal or inguinal pain in high-performance athletes. PAIN (Performing Athletes with Abdominal or Inguinal Neuromuscular Pain Study Group). Am J Sports Med. 2000;28(1):2-8.

31. Zoga AC, Kavanagh EC, Omar IM, et al. Athletic pubalgia and the "sports hernia": MR imaging findings. Radiology. 2008;247(3):797-807.

32. Jakoi A, O'Neill C, Damsgaard C, Fehring K, Tom J. Sports hernia in National Hockey League players: does surgery affect performance? Am J Sports Med. 2013;41(1):107-110.

33. Larson CM, Pierce BR, Giveans MR. Treatment of athletes with symptomatic intra-articular hip pathology and athletic pubalgia/sports hernia: a case series. Arthroscopy.2011;27(6):768-775.

34. Lorentzon R, Wedren H, Pietila T. Incidence, nature, and causes of ice hockey injuries. A three-year prospective study of a Swedish elite ice hockey team. Am J Sports Med. 1988;16(4):392-396.

35. Holmich P, Uhrskou P, Ulnits L, et al. Effectiveness of active physical training as treatment for long-standing adductor-related groin pain in athletes: randomised trial. Lancet. 1999;353(9151):439-443.

36. Sim FH, Chao EY. Injury potential in modern ice hockey. Am J Sports Med. 1978;6(6):378-384.

37. Tyler TF, Nicholas SJ, Campbell RJ, McHugh MP. The association of hip strength and flexibility with the incidence of adductor muscle strains in professional ice hockey players. Am J Sports Med. 2001;29(2):124-128.

38. LaPrade RF, Wijdicks CA, Griffith CJ. Division I intercollegiate ice hockey team coverage. BrJ Sports Med. 2009;43(13):1000-1005.

39. Grant JA, Bedi A, Kurz J, Bancroft R, Miller BS. Incidence and injury characteristics of medial collateral ligament injuries in male collegiate ice hockey players. Sports Health. 2013;5(3):270-272.

40. Erickson BJ, Harris JD, Cole BJ, et al. Performance and return to sport after anterior cruciate ligament reconstruction in National Hockey League players. Orthop J Sports Med. 2014;2(9):2325967114548831.

41. Sikka R, Kurtenbach C, Steubs JT, Boyd JL, Nelson BJ. Anterior Cruciate Ligament Injuries in Professional Hockey Players. Am J Sports Med. 2016;44(2):378-383.

42. Friden T, Erlandsson T, Zatterstrom R, Lindstrand A, Moritz U. Compression or distraction of the anterior cruciate injured knee: variations in injury pattern in contact sports and downhill skiing. Knee Surg Sports Traumatol Arthrosc. 1995;3(3):144-147.

43. Kluczynski MA, Kang JV, Marzo JM, Bisson LJ. Magnetic resonance imaging and intra-articular findings after anterior cruciate ligament injuries in ice hockey versus other sports. Orthop J Sports Med. 2016;4(5):2325967116646534. 44. Beiner JM, Jokl P. Muscle contusion injuries: current treatment options. J Am Acad Orthop Surg. 2001;9(4):227-237.

45. Jackson DW, Feagin JA. Quadriceps contusions in young athletes. Relation of severity of injury to treatment and prognosis. J Bone Joint Surg Am. 1973;55(1):95-105.

46. Ryan JB, Wheeler JH, Hopkinson WJ, Arciero RA, Kolakowski KR. Quadriceps contusions. West Point update. Am J Sports Med. 1991;19(3):299-304.

47. Johnson PN, Mark; Green, Eric. Boot-top lacerations in ice hockey players: a new injury. Clin J Sports Med. 1991:205-208.

48. Nauth A, Aziz M, Tsuji M, Whalen DB, Theodoropoulos JS, Zdero R. The protective effect of Kevlar socks against hockey skate blade injuries: a biomechanical study. Orthop J Sports Med. 2014;2(Suppl 2):7.

49. Wright RW, Barile RJ, Surprenant DA, Matava MJ. Ankle syndesmosis sprains in national hockey league players. Am J Sports Med. 2004;32(8):1941-1945.

50. Boytim MJ, Fischer DA, Neumann L. Syndesmotic ankle sprains. Am J Sports Med. 1991;19(3):294-298.

51. Marymont JV, Lynch MA, Henning CE. Acute ligamentous diastasis of the ankle without fracture. Evaluation by radionuclide imaging. Am J Sports Med. 1986;14(5):407-409.

52. Miller CD, Shelton WR, Barrett GR, Savoie FH, Dukes AD. Deltoid and syndesmosis ligament injury of the ankle without fracture. Am J Sports Med. 1995;23(6):746-750.

53. Singh SK, Larkin KE, Kadakia AR, Hsu WK. Risk factors for reoperation and performance-based outcomes after operative fixation of foot fractures in the professional athlete: a cross-sport analysis. Sports Health. 2018;10(1):70-74.

54. Larson CM. Sports hernia/athletic pubalgia: evaluation and management. Sports Health. 2014;6(2):139-144.

55. Elattar O, Choi HR, Dills VD, Busconi B. Groin injuries (athletic pubalgia) and return to play. Sports Health. 2016;8(4):313-323.

References

1. Flik K, Lyman S, Marx RG. American collegiate men's ice hockey: an analysis of injuries. Am J Sports Med. 2005;33(2):183-187.

2. Popkin CA, Nelson BJ, Park CN, et al. Head, neck, and shoulder injuries in ice hockey: current concepts. Am J Orthop (Belle Mead NJ). 2017;46(3):123-134.

3. Popkin CA, Schulz BM, Park CN, Bottiglieri TS, Lynch TS. Evaluation, management and prevention of lower extremity youth ice hockey injuries. Open Access J Sports Med. 534 2016;7:167-176.

4. Baker JC, Hoover EG, Hillen TJ, Smith MV, Wright RW, Rubin DA. Subradiographic foot and ankle fractures and bone contusions detected by MRI in elite ice hockey players. Am J Sports Med. 2016;44(5):1317-1323.

5. Philippon MJ, Ho CP, Briggs KK, Stull J, LaPrade RF. Prevalence of increased alpha angles as a measure of cam-type femoroacetabular impingement in youth ice hockey players. Am J Sports Med. 2013;41(6):1357-1362.

6. Engebretsen L, Steffen K, Alonso JM, et al. Sports injuries and illnesses during the Winter Olympic Games 2010. Br J Sports Med. 2010;44(11):772-780.

7. Jorgensen U, Schmidt-Olsen S. The epidemiology of ice hockey injuries. Br J Sports Med. 1986;20(1):7-9.

8. Laprade RF, Surowiec RK, Sochanska AN, et al. Epidemiology, identification, treatment and return to play of musculoskeletal-based ice hockey injuries. BrJ Sports Med. 2014;48(1):4-10.

9. Mosenthal W, Kim M, Holzshu R, Hanypsiak B, Athiviraham A. Common ice hockey injuries and treatment: a current concepts review. Curr Sports Med Rep. 2017;16(5):357-362.

10. Tyler TF, Silvers HJ, Gerhardt MB, Nicholas SJ. Groin injuries in sports medicine. Sports Health. 2010;2(3):231-236.

11. Anderson K, Strickland SM, Warren R. Hip and groin injuries in athletes. Am J Sports Med. 2001;29(4):521-533.

12. Dalton SL, Zupon AB, Gardner EC, Djoko A, Dompier TP, Kerr ZY. The epidemiology of hip/groin injuries in National Collegiate Athletic Association men's and women's ice hockey: 2009-2010 through 2014-2015 academic years. Orthop J Sports Med. 2016;4(3):2325967116632692.

13. Epstein DM, McHugh M, Yorio M, Neri B. Intra-articular hip injuries in national hockey league players: a descriptive epidemiological study. Am J Sports Med. 2013;41(2):343-348.

14. Nepple JJ, Vigdorchik JM, Clohisy JC. What is the association between sports participation and the development of proximal femoral cam deformity? A systematic review and meta-analysis. Am J Sports Med. 2015;43(11):2833-2840.

15. Ross JR, Bedi A, Stone RM, Sibilsky Enselman E, Kelly BT, Larson CM. Characterization of symptomatic hip impingement in butterfly ice hockey goalies. Arthroscopy. 2015;31(4):635-642.

16. Bedi A, Dolan M, Hetsroni I, et al. Surgical treatment of femoroacetabular impingement improves hip kinematics: a computer-assisted model. Am J Sports Med. 2011;39(Suppl):43S-49S.

17. Clohisy JC, Knaus ER, Hunt DM, Lesher JM, Harris-Hayes M, Prather H. Clinical presentation of patients with symptomatic anterior hip impingement. Clin Orthop Relat Res. 2009;467(3):638-644.

18. Nepple JJ, Goljan P, Briggs KK, Garvey SE, Ryan M, Philippon MJ. Hip strength deficits in patients with symptomatic femoroacetabular impingement and labral ears. Arthroscopy. 2015;31(11):2106-2111.

19. Audenaert EA, Peeters I, Vigneron L, Baelde N, Pattyn C. Hip morphological characteristics and range of internal rotation in femoroacetabular impingement. Am J Sports Med. 2012;40(6):1329-1336.

20. Notzli HP, Wyss TF, Stoecklin CH, Schmid MR, Treiber K, Hodler J. The contour of the femoral head-neck junction as a predictor for the risk of anterior impingement. J Bone Joint Surg Br. 2002;84(4):556-560.

21. Kuhn AW, Ross JR, Bedi A. Three-dimensional imaging and computer navigation in planning for hip preservation surgery. Sports Med Arthrosc Rev. 2015;23(4):e31-e38.

22. Wall PD, Fernandez M, Griffin DR, Foster NE. Nonoperative treatment for femoroacetabular impingement: a systematic review of the literature. PM R. 2013;5(5):418-426.

23. Kuhn AW, Noonan BC, Kelly BT, Larson CM, Bedi A. The hip in ice hockey: a current concepts review. Arthroscopy. 2016;32(9):1928-1938.

24. O'Connor M, Minkara AA, Westermann RW, Rosneck J, Lynch TS. Return to play after hip arthroscopy: a systematic review and meta-analysis. Am J Sports Med. 2018:46(11):2780-2788.

25. Minkara AA, Westermann RW, Rosneck J, Lynch TS. Systematic review and meta-analysis of outcomes after hip arthroscopy in femoroacetabular impingement. Am J Sports Med. 2018:363546517749475.

26. Philippon MJ, Weiss DR, Kuppersmith DA, Briggs KK, Hay CJ. Arthroscopic labral repair and treatment of femoroacetabular impingement in professional hockey players. Am J Sports Med. 2010;38(1):99-104.

27. Pierce CM, Laprade RF, Wahoff M, O'Brien L, Philippon MJ. Ice hockey goaltender rehabilitation, including on-ice progression, after arthroscopic hip surgery for femoroacetabular impingement. J Orthop Sports Phys Ther. 2013;43(3):129-141.

28. MacLeod DA, Gibbon WW. The sportsman's groin. Br J Surg. 1999;86(7):849-850.

29. Irshad K, Feldman LS, Lavoie C, Lacroix VJ, Mulder DS, Brown RA. Operative management of "hockey groin syndrome": 12 years of experience in National Hockey League players. Surgery. 2001;130(4):759-764; discussion 764-756.

30. Meyers WC, Foley DP, Garrett WE, Lohnes JH, Mandlebaum BR. Management of severe lower abdominal or inguinal pain in high-performance athletes. PAIN (Performing Athletes with Abdominal or Inguinal Neuromuscular Pain Study Group). Am J Sports Med. 2000;28(1):2-8.

31. Zoga AC, Kavanagh EC, Omar IM, et al. Athletic pubalgia and the "sports hernia": MR imaging findings. Radiology. 2008;247(3):797-807.

32. Jakoi A, O'Neill C, Damsgaard C, Fehring K, Tom J. Sports hernia in National Hockey League players: does surgery affect performance? Am J Sports Med. 2013;41(1):107-110.

33. Larson CM, Pierce BR, Giveans MR. Treatment of athletes with symptomatic intra-articular hip pathology and athletic pubalgia/sports hernia: a case series. Arthroscopy.2011;27(6):768-775.

34. Lorentzon R, Wedren H, Pietila T. Incidence, nature, and causes of ice hockey injuries. A three-year prospective study of a Swedish elite ice hockey team. Am J Sports Med. 1988;16(4):392-396.

35. Holmich P, Uhrskou P, Ulnits L, et al. Effectiveness of active physical training as treatment for long-standing adductor-related groin pain in athletes: randomised trial. Lancet. 1999;353(9151):439-443.

36. Sim FH, Chao EY. Injury potential in modern ice hockey. Am J Sports Med. 1978;6(6):378-384.

37. Tyler TF, Nicholas SJ, Campbell RJ, McHugh MP. The association of hip strength and flexibility with the incidence of adductor muscle strains in professional ice hockey players. Am J Sports Med. 2001;29(2):124-128.

38. LaPrade RF, Wijdicks CA, Griffith CJ. Division I intercollegiate ice hockey team coverage. BrJ Sports Med. 2009;43(13):1000-1005.

39. Grant JA, Bedi A, Kurz J, Bancroft R, Miller BS. Incidence and injury characteristics of medial collateral ligament injuries in male collegiate ice hockey players. Sports Health. 2013;5(3):270-272.

40. Erickson BJ, Harris JD, Cole BJ, et al. Performance and return to sport after anterior cruciate ligament reconstruction in National Hockey League players. Orthop J Sports Med. 2014;2(9):2325967114548831.

41. Sikka R, Kurtenbach C, Steubs JT, Boyd JL, Nelson BJ. Anterior Cruciate Ligament Injuries in Professional Hockey Players. Am J Sports Med. 2016;44(2):378-383.

42. Friden T, Erlandsson T, Zatterstrom R, Lindstrand A, Moritz U. Compression or distraction of the anterior cruciate injured knee: variations in injury pattern in contact sports and downhill skiing. Knee Surg Sports Traumatol Arthrosc. 1995;3(3):144-147.

43. Kluczynski MA, Kang JV, Marzo JM, Bisson LJ. Magnetic resonance imaging and intra-articular findings after anterior cruciate ligament injuries in ice hockey versus other sports. Orthop J Sports Med. 2016;4(5):2325967116646534. 44. Beiner JM, Jokl P. Muscle contusion injuries: current treatment options. J Am Acad Orthop Surg. 2001;9(4):227-237.

45. Jackson DW, Feagin JA. Quadriceps contusions in young athletes. Relation of severity of injury to treatment and prognosis. J Bone Joint Surg Am. 1973;55(1):95-105.

46. Ryan JB, Wheeler JH, Hopkinson WJ, Arciero RA, Kolakowski KR. Quadriceps contusions. West Point update. Am J Sports Med. 1991;19(3):299-304.

47. Johnson PN, Mark; Green, Eric. Boot-top lacerations in ice hockey players: a new injury. Clin J Sports Med. 1991:205-208.

48. Nauth A, Aziz M, Tsuji M, Whalen DB, Theodoropoulos JS, Zdero R. The protective effect of Kevlar socks against hockey skate blade injuries: a biomechanical study. Orthop J Sports Med. 2014;2(Suppl 2):7.

49. Wright RW, Barile RJ, Surprenant DA, Matava MJ. Ankle syndesmosis sprains in national hockey league players. Am J Sports Med. 2004;32(8):1941-1945.

50. Boytim MJ, Fischer DA, Neumann L. Syndesmotic ankle sprains. Am J Sports Med. 1991;19(3):294-298.

51. Marymont JV, Lynch MA, Henning CE. Acute ligamentous diastasis of the ankle without fracture. Evaluation by radionuclide imaging. Am J Sports Med. 1986;14(5):407-409.

52. Miller CD, Shelton WR, Barrett GR, Savoie FH, Dukes AD. Deltoid and syndesmosis ligament injury of the ankle without fracture. Am J Sports Med. 1995;23(6):746-750.

53. Singh SK, Larkin KE, Kadakia AR, Hsu WK. Risk factors for reoperation and performance-based outcomes after operative fixation of foot fractures in the professional athlete: a cross-sport analysis. Sports Health. 2018;10(1):70-74.

54. Larson CM. Sports hernia/athletic pubalgia: evaluation and management. Sports Health. 2014;6(2):139-144.

55. Elattar O, Choi HR, Dills VD, Busconi B. Groin injuries (athletic pubalgia) and return to play. Sports Health. 2016;8(4):313-323.

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Lower Extremity Injuries in Ice Hockey: Current Concepts
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Lower Extremity Injuries in Ice Hockey: Current Concepts
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TAKE-HOME POINTS:

  • Ice hockey is a high-speed, collision sport with one of the highest injury rates in all of sports.

  • Femoroacetabular impingement is a cause of hip pain at all levels of ice hockey; studies indicate goaltenders are at high risk—particularly those who utilize the butterfly, as opposed to hybrid or stand-up, goaltending style.

  • Medial collateral ligament (MCL) tears are common in ice hockey and are usually the result of a collision with another player.

  • Use of Kevlar socks and placement of skate tongues deep to the shin pads can help reduce the chance of a boot-top laceration. 

  • High-ankle sprains are more prevalent in ice hockey because of the rigidity of hockey skates and can be a cause of significant loss of time away from the rink.

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Head, Neck, and Shoulder Injuries in Ice Hockey: Current Concepts

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Head, Neck, and Shoulder Injuries in Ice Hockey: Current Concepts

Take-Home Points

  • Hockey is a high-speed collision sport with one of the highest injury rates among all sports.
  • Use of a helmet with visors or full-face shields significantly reduces the risk for eye injury.
  • Broken portions of teeth should be found and placed in a protective medium such as saline, saliva, or milk for transport.
  • A player with unresolved concussion symptoms should not be allowed to return to the ice.
  • Shoulder dominance, which determines stick grip, is an important consideration in the treatment of shoulder instability in an ice hockey player.

On a surface of ice in Windsor, Nova Scotia in the middle of the 19th century, the modern game of ice hockey evolved.1 A blend of hurley, a Gaelic sport, and lacrosse, from the native Mi’kmaq culture, the sport of ice hockey gained rapidly in popularity throughout Canada and is now the country’s national sport. Hockey quickly spread to the United States and then Europe. It is presently played in 77 countries across the world.2

Hockey players can reach speeds of up to 48 km (~30 miles) per hour on razor-sharp skates on an ice surface surrounded by rigid plastic composite boards topped with plexiglass.3 They use sticks made of wood, aluminum, or a composite material to advance a 6-ounce vulcanized rubber puck on the opposing goal, and this puck sometimes reaches speeds over 160 km (~100 miles) per hour. Older, male players are allowed to make physical contact with their opposing counterparts to separate them from the puck (body-checking). Not surprisingly, the potential risk for injury in hockey is high. At the 2010 Winter Olympics, men’s ice hockey players had the highest rate of injury of any other competitors there—more than 30% were affected.4

Table 1.
In the United States, an estimated 20,000 hockey players present to the emergency department (ED) with injuries each year.5 In some leagues, game-related injury rates can be as high as 96 per 1000 player-hours (Table 1).

Hockey is played and enjoyed by athletes ranging widely in age. Youth hockey leagues accept players as young as 5 years. Hockey can become a lifelong recreational activity. In North America, old timers’ leagues have many players up to age 70 years.6 According to International Ice Hockey Federation data for 2016, more than 543,000 and 639,500 people play hockey in the United States and Canada, respectively.2 Most of the rules, protective equipment, skates, ice surfaces, and goal sizes are the same in men’s and women’s hockey.7 The major difference is in body-checking—this practice is not allowed at any age in women’s ice hockey.

In this article, we review the evaluation and management of common head, neck, and shoulder hockey injuries for physicians who provide medical support and coverage for youth, amateur, and senior hockey teams.

Evaluation and Management of Common Hockey Injuries

Eye Injuries

Although eye injuries are less common than musculoskeletal injuries and concussions in hockey, they are a serious risk for recreational and competitive players alike. Furthermore, recovery may be difficult, and eye injuries can have serious lifelong consequences.8 In hockey, the most commonly reported eye injuries are periorbital contusions and lacerations, hyphema, corneal and conjunctival abrasions, orbital fractures, and ruptured globes (Table 2).9,10

Table 2.
Some of these injuries have the potential to cause permanent ocular damage and loss of sight. A clear understanding of how to correctly evaluate, triage, and manage ocular trauma is therefore essential for any physician providing primary medical care for hockey players and teams.

As a contact sport, hockey often involves high-impact, blunt-force trauma. The trauma in hockey results from collisions with other players, the boards, hockey sticks, and pucks. It is therefore not surprising that the most common ocular injuries in this sport are periorbital contusions. Although most contusions cause only mild swelling and ecchymosis of the soft tissues around the eye, there is potential for serious consequences. In a Scandinavia study, Leivo and colleagues10 found that 9% of patients who sustained a periocular contusion also had a clinically significant secondary diagnosis, such as retinal tear or hemorrhage, eyelid laceration, vitreous hemorrhage, or retinal detachment. Although the study was hospital-based, and therefore biased toward more severe cases, its findings highlight the potential severity of eye injuries in hockey. Furthermore, the study found that the majority of players who sustained blunt trauma to the eye itself required lifelong follow-up because of increased risk for glaucoma. This is particularly true for hyphema, as this finding indicates significant damage to intraocular tissues.10Players can also sustain fractures of the orbital bones, including orbital blowout fractures. Typical signs and symptoms of blowout fractures include diplopia, proptosis or enophthalmos, infraorbital hypoesthesia, painful and decreased extraocular movement (particularly upgaze), and palpable crepitance caused by sinus air entering the lower eyelid.11 If orbital fracture is suspected, as it should be in any case in which the injured player experiences pain with eye movement or diplopia, the player should be referred to the ED for computed tomography (CT) and ophthalmologic evaluation.12 Continued participation seriously risks making the injury much worse, particularly should another impact occur. In addition, given the impact needed to cause orbital fractures, consideration must be given to the potential for a coexisting concussion injury.

Severe direct trauma to the eye—from a puck, a stick, or a fist—can result in a ruptured globe, a particularly serious injury that requires immediate surgical attention. Signs and symptoms of a ruptured globe are rarely subtle, but associated eyelid swelling or laceration may obscure the injury, delaying proper diagnosis and treatment. More obvious signs include severely reduced vision, hemorrhagic chemosis (swelling) of the conjunctiva, and an irregular or peaked pupil. If a rupture or any significant intraocular injury is suspected, it is crucial to avoid applying any pressure to the globe, as this can significantly worsen the damage to the intraocular tissues. Use of a helmet with protective shields and cages attached markedly reduces the risk for such injuries.13All eye injuries require prompt assessment, which allows for appropriate management and prevention of secondary damage.14 Initial evaluation of a patient with ocular trauma should begin with external examination for lacerations, swelling, or orbital rim step-off deformity. The physician should also check visual acuity in order to assess for significant vision impairment (counting fingers or reading a sign in the arena; confrontation visual fields). This should be done before attending to any periocular injuries, with the uninjured side serving as a control. Next, the physician should assess the extraocular eye movements as well as the size, shape, and reactivity of the pupils. Particular attention should be paid to detecting any deficit in extraocular movement or irregularity in pupil size, shape, or reactivity, as such findings are highly suggestive of serious injury to the globe.13 Hyphema (blood in anterior chamber of eye anterior to pupil) should be suspected if vision is reduced and the pupil cannot be clearly visualized. However, a bright red clot is not always apparent at time of injury or if the amount of blood is small. An irregular pupil, or a pupil that does not constrict well to light, is also a red flag for serious contusion injury to the eye, and requires ophthalmologic evaluation. It is important to keep in mind that blunt trauma severe enough to produce hyphema or an irregular and poorly reactive pupil is often associated with retinal damage as well, including retinal edema or detachment.

Minor injuries (eg, small foreign bodies, minor periocular contusions and lacerations) can often be managed rink-side. Foreign bodies not embedded in the cornea, but lodged under the upper eyelid, can sometimes be removed by everting the eyelid and sweeping with a moistened cotton swab or using diffuse, sterile saline irrigation.11 Corneal abrasions generally cause severe pain, photophobia, and tearing and are easily diagnosed with use of topical fluorescein and a blue light. A topical anesthetic can be extremely helpful in this setting, as it allows for proper pain-free evaluation, but should never be used in an ongoing manner for pain relief. Small lacerations of the brow can be sutured with 5-0 or 6-0 nylon or closed with 2-Octyl cyanoacrylate tissue adhesive (Dermabond). Eyelid lacerations, unless very small, are best managed by an ophthalmologist; care must be taken to rule out injury to the deeper orbital tissues and eye. If serious injury is suspected, or the eye cannot be appropriately evaluated, it should be stabilized and protected with a protective shield or plastic cup, and the player should be transferred to an ED for appropriate ophthalmologic evaluation.13Most eye injuries are accidental, caused by sticks or deflected pucks, but 18% are acquired in fights.8 Use of visors or full-face cages effectively minimizes the rate of eye injuries.8,13,15,16 In a cohort study of 282 elite amateur ice hockey players, the risk of eye injury was 4.7 times higher in players without face protection than in players who used half-face shields; there were no eye injuries in players who used full-face protection.13 For visors to prevent eye injury, they must be positioned to cover the eyes and the lower edge of the nose in all projections.10

 

 

Dental Injuries

The incidence and type of facial and dental injuries depend directly on the type of face protection used.11,17,18 In a study of face, head, and neck injuries in elite amateur ice hockey players, Stuart and colleagues13 found game-related injury rates of 158.9 per 1000 player-hours in players without face protection, 73.5 in players who used half-face shields, and 23.2 in players who used full-face shields. Players who wore full-face shields had facial, head, and neck injury rates of only 23.2 per 1000 player-game hours.13 Other studies clearly support the important role face shields play in lowering injury risk in hockey. Face and head injuries account for 20% to 40% of all hockey-related injuries,3,16,19 and dental injuries up to 11.5%.20 In a study from Finland, Lahti and colleagues19 found that over a 2-year period, 479 hockey players sustained injuries, including 650 separate dental injuries. The most commonly diagnosed dental injury was an uncomplicated crown fracture, and the most common cause was a hit with a hockey stick, which accounted for 52.7% and 40.3% of dental injuries in games and practices, respectively.19

In the management of dental fractures, the broken portions of teeth should be found and placed in a transportation-protective medium, such as saline, saliva, or milk,16 which can improve functional and esthetic replacement outcomes.21,22 Loose pieces of teeth should not be left in the player’s mouth. The residual tooth should be stabilized and exposure to air and occlusion limited. Dental fractures can affect the enamel, the enamel and dentin structures (uncomplicated fracture), or enamel, dentin, and pulp (complicated).23 Fractures involving only the enamel do not require urgent dental evaluation. Dentin or pulp involvement may cause temperature and air sensitivity.23 If a tooth is air-sensitive, the player should be referred to a specialist immediately.11

Direct trauma can cause instability without displacement (subluxation) or complete displacement of the tooth from its alveolar socket (avulsion).23 An avulsed tooth should be handled by the crown to avoid further damage to the root and periodontal ligament.16,24 The tooth should be rinsed gently with saline and reimplanted in its socket, ideally within 5 to 10 minutes,23with the athlete biting down gently on gauze to hold the tooth in place. A 1-mL supraperiosteal infiltration of 1% or 2% lidocaine hydrochloride (1:100,000 epinephrine) can be given into the apex of the tooth being anesthetized (Figure 1).

Figure 1.
If reimplantation is not possible, the avulsed tooth should be transported in saline, saliva, or milk for emergent dental care.16 If the tooth is driven into the alveolar socket, it should not be repositioned acutely but referred for dental evaluation.11A player with a dental injury should be immediately evaluated for airway obstruction, and the injured area should be washed with sterile water and dabbed with gauze.23 Dental injuries are often permanent and can cause complications later in life.19 Therefore, it is imperative to manage dental injuries appropriately, especially as reimplanting a tooth within 30 minutes results in 90% probability of tooth survival, whereas a 2-hour delay reduces tooth survival to <5%.12 Return to play should be individualized. For completely avulsed teeth that cannot be reimplanted, the player can return to play (with mouth guard protection) within 48 hours as long as there are no bone fractures.24 Players who undergo reimplantation and splinting of avulsed teeth should wait 2 to 4 weeks before returning to play.23 Use of mouth guards and face protection is directly associated with prevention of dental injuries; these protective devices should be worn in practice and competition.16,19,23

Concussions

A concussion is a “complex pathophysiological process affecting the brain, induced by traumatic biomechanical forces.”25 Concussion is largely a functional disturbance instead of a structural injury, owing to the rotational and/or shearing forces involved. Many studies have identified concussion as the most common type of injury in all of youth hockey.26 Concussions account for up to 19% of all injuries in men’s collegiate hockey.3

Concussion can be challenging to diagnose on the ice. The most important factor in concussion management is symptom reporting by the athlete.27 Despite significant efforts in education and awareness, student athletes, especially hockey players, withhold reporting a possible concussion.28 Reasons for underreporting include fear of letting down other players and coaches, thinking the injury is not severe enough to warrant evaluation, and fear of losing standing with the current team or future teams.28

Table 3.
Physicians caring for hockey players should be aware of common symptoms and signs of concussion (Table 3). Concussions can result in abnormalities of balance, cognition, and vision.29

As postinjury concussion assessments are ideal when comparisons can be made with preseason (baseline) scores, preseason testing is becoming standard in professional, college, junior, and high school hockey. This testing involves the Sport Concussion Assessment Tool, 3rd edition (SCAT3), and the King-Devick (K-D) test.30,31 Some youth leagues have baseline testing as well, though the frequency of baseline testing in their players is controversial,32 as the adolescent mind’s processing speed and memory increase exponentially.33 For these younger athletes, it may be necessary to perform baseline testing more frequently than annually.32 A physician can use baseline test results to help diagnose a concussion at the rink and then track the athlete’s recovery and help with return-to-play decisions.29 Vision involves almost half of the brain’s circuits,34 including areas vulnerable to head impact. A neuro-ophthalmologic test can assess for irregularities in accommodation, convergence, ocular muscle balance, pursuit, and saccades.29 The K-D test is a visual performance examination that allows easy and objective assessment of eye movements. Use of both the K-D test and the SCAT3 at the rink may increase the number of concussions detected.29,35 We recommend that physicians use both tests to assess for concussion at the hockey rink.

Initial treatment involves a period of physical rest and relative cognitive rest. Acute worsening of symptoms warrants urgent imaging to rule out a subdural or subarachnoid bleed. Once a player is symptom-free, a graded return-to-play protocol should be followed (Table 4).
Table 4.
After being asymptomatic at rest, a player usually takes at least 1 week to progress through the protocol.25 In the event of a setback during the stepwise program, the player must return to the previous asymptomatic level after 24 hours of rest. Most concussions resolve quickly, without sequelae. Players with persisting symptoms may require medication, vestibular therapy, or other treatment. A player with unresolved symptoms should not be allowed to return to play.

On the prevention side, great efforts have been made to improve hockey helmets. (Some manufacturers claim to have made concussion-proof helmets, but there is no evidence supporting this claim.6) Numerous investigators have reported a lower overall injury rate in players who wear a helmet and a full-face shield.6,13 In addition, rule changes aimed at decreasing head contact have been implemented to decrease the incidence of sport-related concussions.36 Moreover, education on proper helmet use and wear should be emphasized. A study of the effects of hockey helmet fit on cervical motion found that 7 (39%) of 18 players wore a game or competition helmet so loosely that it could be removed without unbuttoning its chinstrap.37 Improperly worn helmets cannot prevent injury as well as properly worn helmets can.

 

 

Cervical Spine Injuries

Whereas American football is associated with a higher annual number of nonfatal catastrophic neck injuries, hockey has a 3 to 6 times higher incidence of cervical spine injuries and spinal cord damage.38,39 A Canadian Ice Hockey Spinal Injuries Registry review of the period 2006 to 2011 identified 44 cervical spine injuries, 7.3 per year on average.40 Severe injury, defined as complete motor and sensory loss, complete motor loss and incomplete sensory, or complete motor loss, occurred in 4 (9.1%) of the 44 injured players. In hockey, a major mechanism of cervical spine injury is an axial load to the slightly flexed spine.39 Of 355 hockey-related cervical spine injuries in a Canada study, 95 (35.5%) were caused by a check from behind.40,41 The Canadian neurosurgeons’ work led to rule changes prohibiting checks from behind, and this prohibition has reduced the incidence of cervical spine injuries in ice hockey.38,40

Team physicians should be comfortable managing serious neck and spine injuries on the ice. Initial evaluation should follow the standard ABCs (airway, breathing, circulation). The physician places a hand on each side of the head to stabilize the neck until the initial examination is complete. The goal is to minimize cervical spine motion until transportation to the hospital for advanced imaging and definitive treatment.37 The decision to remove or leave on the helmet is now controversial. Hockey helmets differ from football helmets in that their chinstraps do not afford significant cervical stabilization, and the helmets have less padding and cover less of the head; in addition, a shockingly high percentage of hockey players do not wear properly fitting helmets.37 In one study, 3-dimensional motion analysis of a hockey player during the logroll technique showed less transverse and sagittal cervical plane motion with the helmet removed than with the helmet (properly fitting or not) in place; the authors recommended removing the helmet to limit extraneous cervical spine motion during the technique.37 However, 2 other studies found that helmet removal can result in significantly increased cervical spine motion of the immobilized hockey player.42,43Recommendation 4 of the recently released interassociation consensus statement of the National Athletic Trainers’ Association reads, “Protective athletic equipment should be removed before transport to an emergency facility for an athlete-patient with suspected cervical spine instability.”44 This represents a shift from leaving the helmet and shoulder pads in place. For ice hockey players with suspected cervical spine injury, more research is needed on cervical motion during the entire sequence—partial logrolls, spine-boarding, placement of cervical collar before or after logroll, and different immobilization techniques for transport.37

The athlete must be carefully transferred to a spine board with either logroll or lift-and-slide. Although an extrication cervical collar can be placed before the spine board is placed, the effectiveness of this collar in executing the spine-board transfer is not proven.45 When the player is on the spine board, the head can be secured with pads and straps en route to the hospital.

Return-to-Play Criteria for Cervical Spine Injuries There is no clear consensus on return-to-play guidelines for cervical spine injuries in athletes.46

Table 5.
Although the literature lacks a standardized protocol, 4 fundamental criteria can be applied to a hockey player returning to the ice: The player should be pain-free and have full cervical neck motion, return of full strength, and no evidence of residual neurologic injury47 (Table 5).

Shoulder Injuries

For hockey players, the upper extremity traditionally has been considered a well-protected area.48 However, shoulder pads are considerably more flexible in hockey than in football and other collision sports. In addition, hockey gloves allow a fair amount of motion for stick handling, and the wrist may be in maximal flexion or extension when a hit against the boards or the ice occurs. Open-ice checking, board collisions, and hockey stick use have been postulated as reasons for the high incidence of upper extremity injuries in hockey. Researchers in Finland found that upper extremity injuries accounted for up to 31% of all hockey injuries.49 More than 50% of these injuries resulted from checking or board collisions. Furthermore, study findings highlighted a low rate of injury in younger players and indicated the rate increases with age.49,50

In hockey players, the acromioclavicular (AC) joint is the most commonly injured shoulder structure.51 The mechanism of injury can be a board collision or an open-ice hit, but most often is a direct blow to the shoulder. The collision disrupts the AC joint and can sprain or tear the coracoclavicular ligaments. The Rockwood classification is used to categorize AC joint injuries (Figure 2).

Figure 2.
Physical examination reveals swelling and tenderness at the joint. Skin tenting can occur with type III and type V injuries, and posterior deformity with type IV. We recommend initially obtaining anteroposterior (AP), scapular-Y, and axillary radiographs in cases of suspected AC joint injury. Weighted views are unnecessary and can exacerbate pain in acutely injured players.

Initial management involves icing the AC joint and placing a sling for comfort. Type I and type II injuries can be managed with progressive range-of-motion (ROM) exercises, strengthening, cryotherapy, and a period of rest. Treatment of type III injuries remains controversial,52 but in hockey players these injuries are almost always treated nonoperatively. Return to play requires full motion, normal strength, and minimal discomfort. Players return a few days to 2 weeks after a grade I injury; recovery from grade II injuries may take 2 to 3 weeks, and recovery from grade III injuries, 6 to 12 weeks. Surgical treatment is usually required in type IV and type V injuries, but we have had experience treating these injuries nonoperatively in high-level players. AC joint reinjury in hockey players is common, and surgical treatment should be approached cautiously, as delayed fracture after return to sport has been reported.53 Special precautions should be taken in collision athletes who undergo AC joint reconstruction. In the anatomical reconstruction described by Carofino and Mazzocca,54 2 holes are drilled in the clavicle; these holes are a potential source of fracture when the collision athlete returns to sport (Figure 3).
Figure 3.
Some authors recommend drilling only 1 hole in order to minimize the risk, but doing so may come at the price of mild anteriorization of the clavicle with this nonanatomical technique. As the optimal surgical treatment for AC joints remains controversial, there is no consensus at this time.

Clavicle fracture is another common hockey injury.55 Studies have shown clavicle fractures proportionally occur most often in people 15 to 19 years old.49 The injury presents with pain and deformity over the clavicle; in more severe fractures, skin tenting is identified. Initial management of suspected clavicle fracture includes cryotherapy, sling, and radiographs. Radiographs should include an AP view and then a 45° cephalad view, which eliminates overshadowing from the ribs. Most clavicle fractures are successfully managed nonoperatively, though there is evidence that significantly displaced or comminuted fractures have better union rates and shoulder function when treated with open reduction and internal fixation.56 After a clavicle fracture, return to skating and noncontact practice usually takes 8 weeks, with return to full contact occurring around 12 weeks.

Sternoclavicular injuries are relatively uncommon, but potentially serious. Special attention should also be given to adolescent athletes with sternoclavicular pain. Although sternoclavicular dislocations have been reported in hockey players, instead these likely are fractures involving the medial clavicle physis.57
Figure 4.
All athletes younger than 25 years carry a risk for this injury pattern, as that age is when the medial clavicle physis closes (Figures 4A-4C). Posterior sternoclavicular injuries should be taken to the operating room for closed versus possible open reduction with a cardiothoracic surgeon on standby (Figure 4D).

The shoulder is the most commonly dislocated major joint, and the incidence of shoulder dislocation in elite hockey players is 8% to 21%.50,58 Anterior shoulder instability occurs from a fall with the shoulder in an abducted, externally rotated and extended position or from a direct anteriorly placed impact to the posterior shoulder. We recommend taking players off the ice for evaluation. Depending on physician comfort, the shoulder can be reduced in the training room, and the athlete sent for radiographs after reduction. If resources or support for closed reduction is not available at the rink, the athlete should be sent to the ED. Initial radiographic evaluation of a player with shoulder injury begins with plain radiographs, including a true AP (Grashey) view with the humerus in neutral, internal, and external rotation and an axillary view. The axillary radiograph is crucial in determining anterior or posterior dislocation. If the patient cannot tolerate the pain associated with having an axillary radiograph taken, a Velpeau radiograph can be used. This radiograph is taken with the patient’s arm in a sling and with the patient leaning back 30° while the x-ray beam is directed superior to inferior.

CT is performed for a suspected osseous injury. CT is more accurate than plain radiographs in showing glenoid and humeral fractures in the acute setting as well as the amount of bone loss in the case of chronic instability. Magnetic resonance arthrography is the imaging modality of choice for the diagnoses of capsulolabral injury.

After shoulder reduction, treatment with a sling, cryotherapy, and a nonsteroidal anti-inflammatory drug is initiated. In a Minnesota study of nonoperative management of shoulder instability, 9 of 10 hockey players were able to return to play the same season, and 6 of the 10 required surgery at the end of the season.59
Figure 5.
We usually recommend focusing initial physical therapy on joint rehabilitation with an emphasis on ROM and strength. We typically recommend players use a Sully brace when players return to the ice59 (Figure 5).

Compared with noncontact athletes, hockey players and other collision athletes are at increased risk for recurrence.60-62 For collision athletes who want to continue playing their sport after recurrent instability, surgery is recommended. A shoulder instability study in Toronto found that more than 54% of 24 professional hockey players had associated Hill-Sachs lesions, but only 3 shoulders (12.5%) had glenoid defects.50 Arthroscopic and open techniques both demonstrate good results, and identification of bone loss can help determine which surgery to recommend.63 Hockey players can usually return to sport 6 months after shoulder stabilization.

Another important consideration in managing shoulder instability in hockey players is shoulder dominance, which determines stick grip. A left-handed player places the right hand on top of the stick for support, but most of the motion associated with shooting the puck—including abduction and external rotation—occurs with the left shoulder. Thus, a left-handed player with a history of previous left-side shoulder dislocation may dislocate with each shot, but a right-handed player with left shoulder instability may have considerably less trouble on the ice.58Shoulder and rotator cuff contusions (RCCs) occur in hockey and other collision sports.49,64 RCCs almost always result from a direct blow to the shoulder, and present with shoulder function loss, weakness, and pain.
Figure 6.
In some cases, RCCs that alter shoulder function can result in missed games and practices. RCC, an acute shoulder injury in an athlete with prior normal RC function, is followed by recovery of RC function—in contrast to tears, which can cause prolonged loss of function and strength.64 RCCs can involve the enthesis, the tendon, the myotendinous junction, or the muscle belly (Figures 6A, 6B). On examination, a hockey player with RCC has decreased active ROM with weakness in external rotation with the arm in 90° of abduction and with scapular plane elevation.
Table 6.
We recommend the treatment protocol outlined by Cohen and colleagues64 (Table 6). Return to ice is allowed after full shoulder ROM and strength have returned. Average time missed is usually about 1 week.

 

 

Summary

Hockey is a high-speed collision sport with one of the highest injury rates among all sports. Physicians caring for youth, amateur, and senior hockey teams see a range of acute head, neck, and shoulder injuries. Although treatment of eye injuries, dental injuries, and concussions is not always considered orthopedic care, an orthopedic surgeon who is covering hockey needs to be comfortable managing these injuries acutely. Quality rink-side care minimizes the impact of the injury, maximizes the functional result, and expedites the safe return of the injured player back to the ice.

Am J Orthop. 2017;46(3):123-134. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

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74. Tuominen M, Stuart MJ, Aubry M, Kannus P, Parkkari J. Injuries in men’s international ice hockey: a 7-year study of the International Ice Hockey Federation Adult World Championship Tournaments and Olympic Winter Games. Br J Sports Med. 2015;49(1):30-36.

75. Heckman JD, Bucholz RW. In: Rockwood CA, Green DP, Heckman JD, Bucholz RW, eds. Rockwood and Green’s Fractures in Adults, Volume 1. Philadelphia, PA: Lippincott Williams & Wilkins; 2001.

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Take-Home Points

  • Hockey is a high-speed collision sport with one of the highest injury rates among all sports.
  • Use of a helmet with visors or full-face shields significantly reduces the risk for eye injury.
  • Broken portions of teeth should be found and placed in a protective medium such as saline, saliva, or milk for transport.
  • A player with unresolved concussion symptoms should not be allowed to return to the ice.
  • Shoulder dominance, which determines stick grip, is an important consideration in the treatment of shoulder instability in an ice hockey player.

On a surface of ice in Windsor, Nova Scotia in the middle of the 19th century, the modern game of ice hockey evolved.1 A blend of hurley, a Gaelic sport, and lacrosse, from the native Mi’kmaq culture, the sport of ice hockey gained rapidly in popularity throughout Canada and is now the country’s national sport. Hockey quickly spread to the United States and then Europe. It is presently played in 77 countries across the world.2

Hockey players can reach speeds of up to 48 km (~30 miles) per hour on razor-sharp skates on an ice surface surrounded by rigid plastic composite boards topped with plexiglass.3 They use sticks made of wood, aluminum, or a composite material to advance a 6-ounce vulcanized rubber puck on the opposing goal, and this puck sometimes reaches speeds over 160 km (~100 miles) per hour. Older, male players are allowed to make physical contact with their opposing counterparts to separate them from the puck (body-checking). Not surprisingly, the potential risk for injury in hockey is high. At the 2010 Winter Olympics, men’s ice hockey players had the highest rate of injury of any other competitors there—more than 30% were affected.4

Table 1.
In the United States, an estimated 20,000 hockey players present to the emergency department (ED) with injuries each year.5 In some leagues, game-related injury rates can be as high as 96 per 1000 player-hours (Table 1).

Hockey is played and enjoyed by athletes ranging widely in age. Youth hockey leagues accept players as young as 5 years. Hockey can become a lifelong recreational activity. In North America, old timers’ leagues have many players up to age 70 years.6 According to International Ice Hockey Federation data for 2016, more than 543,000 and 639,500 people play hockey in the United States and Canada, respectively.2 Most of the rules, protective equipment, skates, ice surfaces, and goal sizes are the same in men’s and women’s hockey.7 The major difference is in body-checking—this practice is not allowed at any age in women’s ice hockey.

In this article, we review the evaluation and management of common head, neck, and shoulder hockey injuries for physicians who provide medical support and coverage for youth, amateur, and senior hockey teams.

Evaluation and Management of Common Hockey Injuries

Eye Injuries

Although eye injuries are less common than musculoskeletal injuries and concussions in hockey, they are a serious risk for recreational and competitive players alike. Furthermore, recovery may be difficult, and eye injuries can have serious lifelong consequences.8 In hockey, the most commonly reported eye injuries are periorbital contusions and lacerations, hyphema, corneal and conjunctival abrasions, orbital fractures, and ruptured globes (Table 2).9,10

Table 2.
Some of these injuries have the potential to cause permanent ocular damage and loss of sight. A clear understanding of how to correctly evaluate, triage, and manage ocular trauma is therefore essential for any physician providing primary medical care for hockey players and teams.

As a contact sport, hockey often involves high-impact, blunt-force trauma. The trauma in hockey results from collisions with other players, the boards, hockey sticks, and pucks. It is therefore not surprising that the most common ocular injuries in this sport are periorbital contusions. Although most contusions cause only mild swelling and ecchymosis of the soft tissues around the eye, there is potential for serious consequences. In a Scandinavia study, Leivo and colleagues10 found that 9% of patients who sustained a periocular contusion also had a clinically significant secondary diagnosis, such as retinal tear or hemorrhage, eyelid laceration, vitreous hemorrhage, or retinal detachment. Although the study was hospital-based, and therefore biased toward more severe cases, its findings highlight the potential severity of eye injuries in hockey. Furthermore, the study found that the majority of players who sustained blunt trauma to the eye itself required lifelong follow-up because of increased risk for glaucoma. This is particularly true for hyphema, as this finding indicates significant damage to intraocular tissues.10Players can also sustain fractures of the orbital bones, including orbital blowout fractures. Typical signs and symptoms of blowout fractures include diplopia, proptosis or enophthalmos, infraorbital hypoesthesia, painful and decreased extraocular movement (particularly upgaze), and palpable crepitance caused by sinus air entering the lower eyelid.11 If orbital fracture is suspected, as it should be in any case in which the injured player experiences pain with eye movement or diplopia, the player should be referred to the ED for computed tomography (CT) and ophthalmologic evaluation.12 Continued participation seriously risks making the injury much worse, particularly should another impact occur. In addition, given the impact needed to cause orbital fractures, consideration must be given to the potential for a coexisting concussion injury.

Severe direct trauma to the eye—from a puck, a stick, or a fist—can result in a ruptured globe, a particularly serious injury that requires immediate surgical attention. Signs and symptoms of a ruptured globe are rarely subtle, but associated eyelid swelling or laceration may obscure the injury, delaying proper diagnosis and treatment. More obvious signs include severely reduced vision, hemorrhagic chemosis (swelling) of the conjunctiva, and an irregular or peaked pupil. If a rupture or any significant intraocular injury is suspected, it is crucial to avoid applying any pressure to the globe, as this can significantly worsen the damage to the intraocular tissues. Use of a helmet with protective shields and cages attached markedly reduces the risk for such injuries.13All eye injuries require prompt assessment, which allows for appropriate management and prevention of secondary damage.14 Initial evaluation of a patient with ocular trauma should begin with external examination for lacerations, swelling, or orbital rim step-off deformity. The physician should also check visual acuity in order to assess for significant vision impairment (counting fingers or reading a sign in the arena; confrontation visual fields). This should be done before attending to any periocular injuries, with the uninjured side serving as a control. Next, the physician should assess the extraocular eye movements as well as the size, shape, and reactivity of the pupils. Particular attention should be paid to detecting any deficit in extraocular movement or irregularity in pupil size, shape, or reactivity, as such findings are highly suggestive of serious injury to the globe.13 Hyphema (blood in anterior chamber of eye anterior to pupil) should be suspected if vision is reduced and the pupil cannot be clearly visualized. However, a bright red clot is not always apparent at time of injury or if the amount of blood is small. An irregular pupil, or a pupil that does not constrict well to light, is also a red flag for serious contusion injury to the eye, and requires ophthalmologic evaluation. It is important to keep in mind that blunt trauma severe enough to produce hyphema or an irregular and poorly reactive pupil is often associated with retinal damage as well, including retinal edema or detachment.

Minor injuries (eg, small foreign bodies, minor periocular contusions and lacerations) can often be managed rink-side. Foreign bodies not embedded in the cornea, but lodged under the upper eyelid, can sometimes be removed by everting the eyelid and sweeping with a moistened cotton swab or using diffuse, sterile saline irrigation.11 Corneal abrasions generally cause severe pain, photophobia, and tearing and are easily diagnosed with use of topical fluorescein and a blue light. A topical anesthetic can be extremely helpful in this setting, as it allows for proper pain-free evaluation, but should never be used in an ongoing manner for pain relief. Small lacerations of the brow can be sutured with 5-0 or 6-0 nylon or closed with 2-Octyl cyanoacrylate tissue adhesive (Dermabond). Eyelid lacerations, unless very small, are best managed by an ophthalmologist; care must be taken to rule out injury to the deeper orbital tissues and eye. If serious injury is suspected, or the eye cannot be appropriately evaluated, it should be stabilized and protected with a protective shield or plastic cup, and the player should be transferred to an ED for appropriate ophthalmologic evaluation.13Most eye injuries are accidental, caused by sticks or deflected pucks, but 18% are acquired in fights.8 Use of visors or full-face cages effectively minimizes the rate of eye injuries.8,13,15,16 In a cohort study of 282 elite amateur ice hockey players, the risk of eye injury was 4.7 times higher in players without face protection than in players who used half-face shields; there were no eye injuries in players who used full-face protection.13 For visors to prevent eye injury, they must be positioned to cover the eyes and the lower edge of the nose in all projections.10

 

 

Dental Injuries

The incidence and type of facial and dental injuries depend directly on the type of face protection used.11,17,18 In a study of face, head, and neck injuries in elite amateur ice hockey players, Stuart and colleagues13 found game-related injury rates of 158.9 per 1000 player-hours in players without face protection, 73.5 in players who used half-face shields, and 23.2 in players who used full-face shields. Players who wore full-face shields had facial, head, and neck injury rates of only 23.2 per 1000 player-game hours.13 Other studies clearly support the important role face shields play in lowering injury risk in hockey. Face and head injuries account for 20% to 40% of all hockey-related injuries,3,16,19 and dental injuries up to 11.5%.20 In a study from Finland, Lahti and colleagues19 found that over a 2-year period, 479 hockey players sustained injuries, including 650 separate dental injuries. The most commonly diagnosed dental injury was an uncomplicated crown fracture, and the most common cause was a hit with a hockey stick, which accounted for 52.7% and 40.3% of dental injuries in games and practices, respectively.19

In the management of dental fractures, the broken portions of teeth should be found and placed in a transportation-protective medium, such as saline, saliva, or milk,16 which can improve functional and esthetic replacement outcomes.21,22 Loose pieces of teeth should not be left in the player’s mouth. The residual tooth should be stabilized and exposure to air and occlusion limited. Dental fractures can affect the enamel, the enamel and dentin structures (uncomplicated fracture), or enamel, dentin, and pulp (complicated).23 Fractures involving only the enamel do not require urgent dental evaluation. Dentin or pulp involvement may cause temperature and air sensitivity.23 If a tooth is air-sensitive, the player should be referred to a specialist immediately.11

Direct trauma can cause instability without displacement (subluxation) or complete displacement of the tooth from its alveolar socket (avulsion).23 An avulsed tooth should be handled by the crown to avoid further damage to the root and periodontal ligament.16,24 The tooth should be rinsed gently with saline and reimplanted in its socket, ideally within 5 to 10 minutes,23with the athlete biting down gently on gauze to hold the tooth in place. A 1-mL supraperiosteal infiltration of 1% or 2% lidocaine hydrochloride (1:100,000 epinephrine) can be given into the apex of the tooth being anesthetized (Figure 1).

Figure 1.
If reimplantation is not possible, the avulsed tooth should be transported in saline, saliva, or milk for emergent dental care.16 If the tooth is driven into the alveolar socket, it should not be repositioned acutely but referred for dental evaluation.11A player with a dental injury should be immediately evaluated for airway obstruction, and the injured area should be washed with sterile water and dabbed with gauze.23 Dental injuries are often permanent and can cause complications later in life.19 Therefore, it is imperative to manage dental injuries appropriately, especially as reimplanting a tooth within 30 minutes results in 90% probability of tooth survival, whereas a 2-hour delay reduces tooth survival to <5%.12 Return to play should be individualized. For completely avulsed teeth that cannot be reimplanted, the player can return to play (with mouth guard protection) within 48 hours as long as there are no bone fractures.24 Players who undergo reimplantation and splinting of avulsed teeth should wait 2 to 4 weeks before returning to play.23 Use of mouth guards and face protection is directly associated with prevention of dental injuries; these protective devices should be worn in practice and competition.16,19,23

Concussions

A concussion is a “complex pathophysiological process affecting the brain, induced by traumatic biomechanical forces.”25 Concussion is largely a functional disturbance instead of a structural injury, owing to the rotational and/or shearing forces involved. Many studies have identified concussion as the most common type of injury in all of youth hockey.26 Concussions account for up to 19% of all injuries in men’s collegiate hockey.3

Concussion can be challenging to diagnose on the ice. The most important factor in concussion management is symptom reporting by the athlete.27 Despite significant efforts in education and awareness, student athletes, especially hockey players, withhold reporting a possible concussion.28 Reasons for underreporting include fear of letting down other players and coaches, thinking the injury is not severe enough to warrant evaluation, and fear of losing standing with the current team or future teams.28

Table 3.
Physicians caring for hockey players should be aware of common symptoms and signs of concussion (Table 3). Concussions can result in abnormalities of balance, cognition, and vision.29

As postinjury concussion assessments are ideal when comparisons can be made with preseason (baseline) scores, preseason testing is becoming standard in professional, college, junior, and high school hockey. This testing involves the Sport Concussion Assessment Tool, 3rd edition (SCAT3), and the King-Devick (K-D) test.30,31 Some youth leagues have baseline testing as well, though the frequency of baseline testing in their players is controversial,32 as the adolescent mind’s processing speed and memory increase exponentially.33 For these younger athletes, it may be necessary to perform baseline testing more frequently than annually.32 A physician can use baseline test results to help diagnose a concussion at the rink and then track the athlete’s recovery and help with return-to-play decisions.29 Vision involves almost half of the brain’s circuits,34 including areas vulnerable to head impact. A neuro-ophthalmologic test can assess for irregularities in accommodation, convergence, ocular muscle balance, pursuit, and saccades.29 The K-D test is a visual performance examination that allows easy and objective assessment of eye movements. Use of both the K-D test and the SCAT3 at the rink may increase the number of concussions detected.29,35 We recommend that physicians use both tests to assess for concussion at the hockey rink.

Initial treatment involves a period of physical rest and relative cognitive rest. Acute worsening of symptoms warrants urgent imaging to rule out a subdural or subarachnoid bleed. Once a player is symptom-free, a graded return-to-play protocol should be followed (Table 4).
Table 4.
After being asymptomatic at rest, a player usually takes at least 1 week to progress through the protocol.25 In the event of a setback during the stepwise program, the player must return to the previous asymptomatic level after 24 hours of rest. Most concussions resolve quickly, without sequelae. Players with persisting symptoms may require medication, vestibular therapy, or other treatment. A player with unresolved symptoms should not be allowed to return to play.

On the prevention side, great efforts have been made to improve hockey helmets. (Some manufacturers claim to have made concussion-proof helmets, but there is no evidence supporting this claim.6) Numerous investigators have reported a lower overall injury rate in players who wear a helmet and a full-face shield.6,13 In addition, rule changes aimed at decreasing head contact have been implemented to decrease the incidence of sport-related concussions.36 Moreover, education on proper helmet use and wear should be emphasized. A study of the effects of hockey helmet fit on cervical motion found that 7 (39%) of 18 players wore a game or competition helmet so loosely that it could be removed without unbuttoning its chinstrap.37 Improperly worn helmets cannot prevent injury as well as properly worn helmets can.

 

 

Cervical Spine Injuries

Whereas American football is associated with a higher annual number of nonfatal catastrophic neck injuries, hockey has a 3 to 6 times higher incidence of cervical spine injuries and spinal cord damage.38,39 A Canadian Ice Hockey Spinal Injuries Registry review of the period 2006 to 2011 identified 44 cervical spine injuries, 7.3 per year on average.40 Severe injury, defined as complete motor and sensory loss, complete motor loss and incomplete sensory, or complete motor loss, occurred in 4 (9.1%) of the 44 injured players. In hockey, a major mechanism of cervical spine injury is an axial load to the slightly flexed spine.39 Of 355 hockey-related cervical spine injuries in a Canada study, 95 (35.5%) were caused by a check from behind.40,41 The Canadian neurosurgeons’ work led to rule changes prohibiting checks from behind, and this prohibition has reduced the incidence of cervical spine injuries in ice hockey.38,40

Team physicians should be comfortable managing serious neck and spine injuries on the ice. Initial evaluation should follow the standard ABCs (airway, breathing, circulation). The physician places a hand on each side of the head to stabilize the neck until the initial examination is complete. The goal is to minimize cervical spine motion until transportation to the hospital for advanced imaging and definitive treatment.37 The decision to remove or leave on the helmet is now controversial. Hockey helmets differ from football helmets in that their chinstraps do not afford significant cervical stabilization, and the helmets have less padding and cover less of the head; in addition, a shockingly high percentage of hockey players do not wear properly fitting helmets.37 In one study, 3-dimensional motion analysis of a hockey player during the logroll technique showed less transverse and sagittal cervical plane motion with the helmet removed than with the helmet (properly fitting or not) in place; the authors recommended removing the helmet to limit extraneous cervical spine motion during the technique.37 However, 2 other studies found that helmet removal can result in significantly increased cervical spine motion of the immobilized hockey player.42,43Recommendation 4 of the recently released interassociation consensus statement of the National Athletic Trainers’ Association reads, “Protective athletic equipment should be removed before transport to an emergency facility for an athlete-patient with suspected cervical spine instability.”44 This represents a shift from leaving the helmet and shoulder pads in place. For ice hockey players with suspected cervical spine injury, more research is needed on cervical motion during the entire sequence—partial logrolls, spine-boarding, placement of cervical collar before or after logroll, and different immobilization techniques for transport.37

The athlete must be carefully transferred to a spine board with either logroll or lift-and-slide. Although an extrication cervical collar can be placed before the spine board is placed, the effectiveness of this collar in executing the spine-board transfer is not proven.45 When the player is on the spine board, the head can be secured with pads and straps en route to the hospital.

Return-to-Play Criteria for Cervical Spine Injuries There is no clear consensus on return-to-play guidelines for cervical spine injuries in athletes.46

Table 5.
Although the literature lacks a standardized protocol, 4 fundamental criteria can be applied to a hockey player returning to the ice: The player should be pain-free and have full cervical neck motion, return of full strength, and no evidence of residual neurologic injury47 (Table 5).

Shoulder Injuries

For hockey players, the upper extremity traditionally has been considered a well-protected area.48 However, shoulder pads are considerably more flexible in hockey than in football and other collision sports. In addition, hockey gloves allow a fair amount of motion for stick handling, and the wrist may be in maximal flexion or extension when a hit against the boards or the ice occurs. Open-ice checking, board collisions, and hockey stick use have been postulated as reasons for the high incidence of upper extremity injuries in hockey. Researchers in Finland found that upper extremity injuries accounted for up to 31% of all hockey injuries.49 More than 50% of these injuries resulted from checking or board collisions. Furthermore, study findings highlighted a low rate of injury in younger players and indicated the rate increases with age.49,50

In hockey players, the acromioclavicular (AC) joint is the most commonly injured shoulder structure.51 The mechanism of injury can be a board collision or an open-ice hit, but most often is a direct blow to the shoulder. The collision disrupts the AC joint and can sprain or tear the coracoclavicular ligaments. The Rockwood classification is used to categorize AC joint injuries (Figure 2).

Figure 2.
Physical examination reveals swelling and tenderness at the joint. Skin tenting can occur with type III and type V injuries, and posterior deformity with type IV. We recommend initially obtaining anteroposterior (AP), scapular-Y, and axillary radiographs in cases of suspected AC joint injury. Weighted views are unnecessary and can exacerbate pain in acutely injured players.

Initial management involves icing the AC joint and placing a sling for comfort. Type I and type II injuries can be managed with progressive range-of-motion (ROM) exercises, strengthening, cryotherapy, and a period of rest. Treatment of type III injuries remains controversial,52 but in hockey players these injuries are almost always treated nonoperatively. Return to play requires full motion, normal strength, and minimal discomfort. Players return a few days to 2 weeks after a grade I injury; recovery from grade II injuries may take 2 to 3 weeks, and recovery from grade III injuries, 6 to 12 weeks. Surgical treatment is usually required in type IV and type V injuries, but we have had experience treating these injuries nonoperatively in high-level players. AC joint reinjury in hockey players is common, and surgical treatment should be approached cautiously, as delayed fracture after return to sport has been reported.53 Special precautions should be taken in collision athletes who undergo AC joint reconstruction. In the anatomical reconstruction described by Carofino and Mazzocca,54 2 holes are drilled in the clavicle; these holes are a potential source of fracture when the collision athlete returns to sport (Figure 3).
Figure 3.
Some authors recommend drilling only 1 hole in order to minimize the risk, but doing so may come at the price of mild anteriorization of the clavicle with this nonanatomical technique. As the optimal surgical treatment for AC joints remains controversial, there is no consensus at this time.

Clavicle fracture is another common hockey injury.55 Studies have shown clavicle fractures proportionally occur most often in people 15 to 19 years old.49 The injury presents with pain and deformity over the clavicle; in more severe fractures, skin tenting is identified. Initial management of suspected clavicle fracture includes cryotherapy, sling, and radiographs. Radiographs should include an AP view and then a 45° cephalad view, which eliminates overshadowing from the ribs. Most clavicle fractures are successfully managed nonoperatively, though there is evidence that significantly displaced or comminuted fractures have better union rates and shoulder function when treated with open reduction and internal fixation.56 After a clavicle fracture, return to skating and noncontact practice usually takes 8 weeks, with return to full contact occurring around 12 weeks.

Sternoclavicular injuries are relatively uncommon, but potentially serious. Special attention should also be given to adolescent athletes with sternoclavicular pain. Although sternoclavicular dislocations have been reported in hockey players, instead these likely are fractures involving the medial clavicle physis.57
Figure 4.
All athletes younger than 25 years carry a risk for this injury pattern, as that age is when the medial clavicle physis closes (Figures 4A-4C). Posterior sternoclavicular injuries should be taken to the operating room for closed versus possible open reduction with a cardiothoracic surgeon on standby (Figure 4D).

The shoulder is the most commonly dislocated major joint, and the incidence of shoulder dislocation in elite hockey players is 8% to 21%.50,58 Anterior shoulder instability occurs from a fall with the shoulder in an abducted, externally rotated and extended position or from a direct anteriorly placed impact to the posterior shoulder. We recommend taking players off the ice for evaluation. Depending on physician comfort, the shoulder can be reduced in the training room, and the athlete sent for radiographs after reduction. If resources or support for closed reduction is not available at the rink, the athlete should be sent to the ED. Initial radiographic evaluation of a player with shoulder injury begins with plain radiographs, including a true AP (Grashey) view with the humerus in neutral, internal, and external rotation and an axillary view. The axillary radiograph is crucial in determining anterior or posterior dislocation. If the patient cannot tolerate the pain associated with having an axillary radiograph taken, a Velpeau radiograph can be used. This radiograph is taken with the patient’s arm in a sling and with the patient leaning back 30° while the x-ray beam is directed superior to inferior.

CT is performed for a suspected osseous injury. CT is more accurate than plain radiographs in showing glenoid and humeral fractures in the acute setting as well as the amount of bone loss in the case of chronic instability. Magnetic resonance arthrography is the imaging modality of choice for the diagnoses of capsulolabral injury.

After shoulder reduction, treatment with a sling, cryotherapy, and a nonsteroidal anti-inflammatory drug is initiated. In a Minnesota study of nonoperative management of shoulder instability, 9 of 10 hockey players were able to return to play the same season, and 6 of the 10 required surgery at the end of the season.59
Figure 5.
We usually recommend focusing initial physical therapy on joint rehabilitation with an emphasis on ROM and strength. We typically recommend players use a Sully brace when players return to the ice59 (Figure 5).

Compared with noncontact athletes, hockey players and other collision athletes are at increased risk for recurrence.60-62 For collision athletes who want to continue playing their sport after recurrent instability, surgery is recommended. A shoulder instability study in Toronto found that more than 54% of 24 professional hockey players had associated Hill-Sachs lesions, but only 3 shoulders (12.5%) had glenoid defects.50 Arthroscopic and open techniques both demonstrate good results, and identification of bone loss can help determine which surgery to recommend.63 Hockey players can usually return to sport 6 months after shoulder stabilization.

Another important consideration in managing shoulder instability in hockey players is shoulder dominance, which determines stick grip. A left-handed player places the right hand on top of the stick for support, but most of the motion associated with shooting the puck—including abduction and external rotation—occurs with the left shoulder. Thus, a left-handed player with a history of previous left-side shoulder dislocation may dislocate with each shot, but a right-handed player with left shoulder instability may have considerably less trouble on the ice.58Shoulder and rotator cuff contusions (RCCs) occur in hockey and other collision sports.49,64 RCCs almost always result from a direct blow to the shoulder, and present with shoulder function loss, weakness, and pain.
Figure 6.
In some cases, RCCs that alter shoulder function can result in missed games and practices. RCC, an acute shoulder injury in an athlete with prior normal RC function, is followed by recovery of RC function—in contrast to tears, which can cause prolonged loss of function and strength.64 RCCs can involve the enthesis, the tendon, the myotendinous junction, or the muscle belly (Figures 6A, 6B). On examination, a hockey player with RCC has decreased active ROM with weakness in external rotation with the arm in 90° of abduction and with scapular plane elevation.
Table 6.
We recommend the treatment protocol outlined by Cohen and colleagues64 (Table 6). Return to ice is allowed after full shoulder ROM and strength have returned. Average time missed is usually about 1 week.

 

 

Summary

Hockey is a high-speed collision sport with one of the highest injury rates among all sports. Physicians caring for youth, amateur, and senior hockey teams see a range of acute head, neck, and shoulder injuries. Although treatment of eye injuries, dental injuries, and concussions is not always considered orthopedic care, an orthopedic surgeon who is covering hockey needs to be comfortable managing these injuries acutely. Quality rink-side care minimizes the impact of the injury, maximizes the functional result, and expedites the safe return of the injured player back to the ice.

Am J Orthop. 2017;46(3):123-134. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

Take-Home Points

  • Hockey is a high-speed collision sport with one of the highest injury rates among all sports.
  • Use of a helmet with visors or full-face shields significantly reduces the risk for eye injury.
  • Broken portions of teeth should be found and placed in a protective medium such as saline, saliva, or milk for transport.
  • A player with unresolved concussion symptoms should not be allowed to return to the ice.
  • Shoulder dominance, which determines stick grip, is an important consideration in the treatment of shoulder instability in an ice hockey player.

On a surface of ice in Windsor, Nova Scotia in the middle of the 19th century, the modern game of ice hockey evolved.1 A blend of hurley, a Gaelic sport, and lacrosse, from the native Mi’kmaq culture, the sport of ice hockey gained rapidly in popularity throughout Canada and is now the country’s national sport. Hockey quickly spread to the United States and then Europe. It is presently played in 77 countries across the world.2

Hockey players can reach speeds of up to 48 km (~30 miles) per hour on razor-sharp skates on an ice surface surrounded by rigid plastic composite boards topped with plexiglass.3 They use sticks made of wood, aluminum, or a composite material to advance a 6-ounce vulcanized rubber puck on the opposing goal, and this puck sometimes reaches speeds over 160 km (~100 miles) per hour. Older, male players are allowed to make physical contact with their opposing counterparts to separate them from the puck (body-checking). Not surprisingly, the potential risk for injury in hockey is high. At the 2010 Winter Olympics, men’s ice hockey players had the highest rate of injury of any other competitors there—more than 30% were affected.4

Table 1.
In the United States, an estimated 20,000 hockey players present to the emergency department (ED) with injuries each year.5 In some leagues, game-related injury rates can be as high as 96 per 1000 player-hours (Table 1).

Hockey is played and enjoyed by athletes ranging widely in age. Youth hockey leagues accept players as young as 5 years. Hockey can become a lifelong recreational activity. In North America, old timers’ leagues have many players up to age 70 years.6 According to International Ice Hockey Federation data for 2016, more than 543,000 and 639,500 people play hockey in the United States and Canada, respectively.2 Most of the rules, protective equipment, skates, ice surfaces, and goal sizes are the same in men’s and women’s hockey.7 The major difference is in body-checking—this practice is not allowed at any age in women’s ice hockey.

In this article, we review the evaluation and management of common head, neck, and shoulder hockey injuries for physicians who provide medical support and coverage for youth, amateur, and senior hockey teams.

Evaluation and Management of Common Hockey Injuries

Eye Injuries

Although eye injuries are less common than musculoskeletal injuries and concussions in hockey, they are a serious risk for recreational and competitive players alike. Furthermore, recovery may be difficult, and eye injuries can have serious lifelong consequences.8 In hockey, the most commonly reported eye injuries are periorbital contusions and lacerations, hyphema, corneal and conjunctival abrasions, orbital fractures, and ruptured globes (Table 2).9,10

Table 2.
Some of these injuries have the potential to cause permanent ocular damage and loss of sight. A clear understanding of how to correctly evaluate, triage, and manage ocular trauma is therefore essential for any physician providing primary medical care for hockey players and teams.

As a contact sport, hockey often involves high-impact, blunt-force trauma. The trauma in hockey results from collisions with other players, the boards, hockey sticks, and pucks. It is therefore not surprising that the most common ocular injuries in this sport are periorbital contusions. Although most contusions cause only mild swelling and ecchymosis of the soft tissues around the eye, there is potential for serious consequences. In a Scandinavia study, Leivo and colleagues10 found that 9% of patients who sustained a periocular contusion also had a clinically significant secondary diagnosis, such as retinal tear or hemorrhage, eyelid laceration, vitreous hemorrhage, or retinal detachment. Although the study was hospital-based, and therefore biased toward more severe cases, its findings highlight the potential severity of eye injuries in hockey. Furthermore, the study found that the majority of players who sustained blunt trauma to the eye itself required lifelong follow-up because of increased risk for glaucoma. This is particularly true for hyphema, as this finding indicates significant damage to intraocular tissues.10Players can also sustain fractures of the orbital bones, including orbital blowout fractures. Typical signs and symptoms of blowout fractures include diplopia, proptosis or enophthalmos, infraorbital hypoesthesia, painful and decreased extraocular movement (particularly upgaze), and palpable crepitance caused by sinus air entering the lower eyelid.11 If orbital fracture is suspected, as it should be in any case in which the injured player experiences pain with eye movement or diplopia, the player should be referred to the ED for computed tomography (CT) and ophthalmologic evaluation.12 Continued participation seriously risks making the injury much worse, particularly should another impact occur. In addition, given the impact needed to cause orbital fractures, consideration must be given to the potential for a coexisting concussion injury.

Severe direct trauma to the eye—from a puck, a stick, or a fist—can result in a ruptured globe, a particularly serious injury that requires immediate surgical attention. Signs and symptoms of a ruptured globe are rarely subtle, but associated eyelid swelling or laceration may obscure the injury, delaying proper diagnosis and treatment. More obvious signs include severely reduced vision, hemorrhagic chemosis (swelling) of the conjunctiva, and an irregular or peaked pupil. If a rupture or any significant intraocular injury is suspected, it is crucial to avoid applying any pressure to the globe, as this can significantly worsen the damage to the intraocular tissues. Use of a helmet with protective shields and cages attached markedly reduces the risk for such injuries.13All eye injuries require prompt assessment, which allows for appropriate management and prevention of secondary damage.14 Initial evaluation of a patient with ocular trauma should begin with external examination for lacerations, swelling, or orbital rim step-off deformity. The physician should also check visual acuity in order to assess for significant vision impairment (counting fingers or reading a sign in the arena; confrontation visual fields). This should be done before attending to any periocular injuries, with the uninjured side serving as a control. Next, the physician should assess the extraocular eye movements as well as the size, shape, and reactivity of the pupils. Particular attention should be paid to detecting any deficit in extraocular movement or irregularity in pupil size, shape, or reactivity, as such findings are highly suggestive of serious injury to the globe.13 Hyphema (blood in anterior chamber of eye anterior to pupil) should be suspected if vision is reduced and the pupil cannot be clearly visualized. However, a bright red clot is not always apparent at time of injury or if the amount of blood is small. An irregular pupil, or a pupil that does not constrict well to light, is also a red flag for serious contusion injury to the eye, and requires ophthalmologic evaluation. It is important to keep in mind that blunt trauma severe enough to produce hyphema or an irregular and poorly reactive pupil is often associated with retinal damage as well, including retinal edema or detachment.

Minor injuries (eg, small foreign bodies, minor periocular contusions and lacerations) can often be managed rink-side. Foreign bodies not embedded in the cornea, but lodged under the upper eyelid, can sometimes be removed by everting the eyelid and sweeping with a moistened cotton swab or using diffuse, sterile saline irrigation.11 Corneal abrasions generally cause severe pain, photophobia, and tearing and are easily diagnosed with use of topical fluorescein and a blue light. A topical anesthetic can be extremely helpful in this setting, as it allows for proper pain-free evaluation, but should never be used in an ongoing manner for pain relief. Small lacerations of the brow can be sutured with 5-0 or 6-0 nylon or closed with 2-Octyl cyanoacrylate tissue adhesive (Dermabond). Eyelid lacerations, unless very small, are best managed by an ophthalmologist; care must be taken to rule out injury to the deeper orbital tissues and eye. If serious injury is suspected, or the eye cannot be appropriately evaluated, it should be stabilized and protected with a protective shield or plastic cup, and the player should be transferred to an ED for appropriate ophthalmologic evaluation.13Most eye injuries are accidental, caused by sticks or deflected pucks, but 18% are acquired in fights.8 Use of visors or full-face cages effectively minimizes the rate of eye injuries.8,13,15,16 In a cohort study of 282 elite amateur ice hockey players, the risk of eye injury was 4.7 times higher in players without face protection than in players who used half-face shields; there were no eye injuries in players who used full-face protection.13 For visors to prevent eye injury, they must be positioned to cover the eyes and the lower edge of the nose in all projections.10

 

 

Dental Injuries

The incidence and type of facial and dental injuries depend directly on the type of face protection used.11,17,18 In a study of face, head, and neck injuries in elite amateur ice hockey players, Stuart and colleagues13 found game-related injury rates of 158.9 per 1000 player-hours in players without face protection, 73.5 in players who used half-face shields, and 23.2 in players who used full-face shields. Players who wore full-face shields had facial, head, and neck injury rates of only 23.2 per 1000 player-game hours.13 Other studies clearly support the important role face shields play in lowering injury risk in hockey. Face and head injuries account for 20% to 40% of all hockey-related injuries,3,16,19 and dental injuries up to 11.5%.20 In a study from Finland, Lahti and colleagues19 found that over a 2-year period, 479 hockey players sustained injuries, including 650 separate dental injuries. The most commonly diagnosed dental injury was an uncomplicated crown fracture, and the most common cause was a hit with a hockey stick, which accounted for 52.7% and 40.3% of dental injuries in games and practices, respectively.19

In the management of dental fractures, the broken portions of teeth should be found and placed in a transportation-protective medium, such as saline, saliva, or milk,16 which can improve functional and esthetic replacement outcomes.21,22 Loose pieces of teeth should not be left in the player’s mouth. The residual tooth should be stabilized and exposure to air and occlusion limited. Dental fractures can affect the enamel, the enamel and dentin structures (uncomplicated fracture), or enamel, dentin, and pulp (complicated).23 Fractures involving only the enamel do not require urgent dental evaluation. Dentin or pulp involvement may cause temperature and air sensitivity.23 If a tooth is air-sensitive, the player should be referred to a specialist immediately.11

Direct trauma can cause instability without displacement (subluxation) or complete displacement of the tooth from its alveolar socket (avulsion).23 An avulsed tooth should be handled by the crown to avoid further damage to the root and periodontal ligament.16,24 The tooth should be rinsed gently with saline and reimplanted in its socket, ideally within 5 to 10 minutes,23with the athlete biting down gently on gauze to hold the tooth in place. A 1-mL supraperiosteal infiltration of 1% or 2% lidocaine hydrochloride (1:100,000 epinephrine) can be given into the apex of the tooth being anesthetized (Figure 1).

Figure 1.
If reimplantation is not possible, the avulsed tooth should be transported in saline, saliva, or milk for emergent dental care.16 If the tooth is driven into the alveolar socket, it should not be repositioned acutely but referred for dental evaluation.11A player with a dental injury should be immediately evaluated for airway obstruction, and the injured area should be washed with sterile water and dabbed with gauze.23 Dental injuries are often permanent and can cause complications later in life.19 Therefore, it is imperative to manage dental injuries appropriately, especially as reimplanting a tooth within 30 minutes results in 90% probability of tooth survival, whereas a 2-hour delay reduces tooth survival to <5%.12 Return to play should be individualized. For completely avulsed teeth that cannot be reimplanted, the player can return to play (with mouth guard protection) within 48 hours as long as there are no bone fractures.24 Players who undergo reimplantation and splinting of avulsed teeth should wait 2 to 4 weeks before returning to play.23 Use of mouth guards and face protection is directly associated with prevention of dental injuries; these protective devices should be worn in practice and competition.16,19,23

Concussions

A concussion is a “complex pathophysiological process affecting the brain, induced by traumatic biomechanical forces.”25 Concussion is largely a functional disturbance instead of a structural injury, owing to the rotational and/or shearing forces involved. Many studies have identified concussion as the most common type of injury in all of youth hockey.26 Concussions account for up to 19% of all injuries in men’s collegiate hockey.3

Concussion can be challenging to diagnose on the ice. The most important factor in concussion management is symptom reporting by the athlete.27 Despite significant efforts in education and awareness, student athletes, especially hockey players, withhold reporting a possible concussion.28 Reasons for underreporting include fear of letting down other players and coaches, thinking the injury is not severe enough to warrant evaluation, and fear of losing standing with the current team or future teams.28

Table 3.
Physicians caring for hockey players should be aware of common symptoms and signs of concussion (Table 3). Concussions can result in abnormalities of balance, cognition, and vision.29

As postinjury concussion assessments are ideal when comparisons can be made with preseason (baseline) scores, preseason testing is becoming standard in professional, college, junior, and high school hockey. This testing involves the Sport Concussion Assessment Tool, 3rd edition (SCAT3), and the King-Devick (K-D) test.30,31 Some youth leagues have baseline testing as well, though the frequency of baseline testing in their players is controversial,32 as the adolescent mind’s processing speed and memory increase exponentially.33 For these younger athletes, it may be necessary to perform baseline testing more frequently than annually.32 A physician can use baseline test results to help diagnose a concussion at the rink and then track the athlete’s recovery and help with return-to-play decisions.29 Vision involves almost half of the brain’s circuits,34 including areas vulnerable to head impact. A neuro-ophthalmologic test can assess for irregularities in accommodation, convergence, ocular muscle balance, pursuit, and saccades.29 The K-D test is a visual performance examination that allows easy and objective assessment of eye movements. Use of both the K-D test and the SCAT3 at the rink may increase the number of concussions detected.29,35 We recommend that physicians use both tests to assess for concussion at the hockey rink.

Initial treatment involves a period of physical rest and relative cognitive rest. Acute worsening of symptoms warrants urgent imaging to rule out a subdural or subarachnoid bleed. Once a player is symptom-free, a graded return-to-play protocol should be followed (Table 4).
Table 4.
After being asymptomatic at rest, a player usually takes at least 1 week to progress through the protocol.25 In the event of a setback during the stepwise program, the player must return to the previous asymptomatic level after 24 hours of rest. Most concussions resolve quickly, without sequelae. Players with persisting symptoms may require medication, vestibular therapy, or other treatment. A player with unresolved symptoms should not be allowed to return to play.

On the prevention side, great efforts have been made to improve hockey helmets. (Some manufacturers claim to have made concussion-proof helmets, but there is no evidence supporting this claim.6) Numerous investigators have reported a lower overall injury rate in players who wear a helmet and a full-face shield.6,13 In addition, rule changes aimed at decreasing head contact have been implemented to decrease the incidence of sport-related concussions.36 Moreover, education on proper helmet use and wear should be emphasized. A study of the effects of hockey helmet fit on cervical motion found that 7 (39%) of 18 players wore a game or competition helmet so loosely that it could be removed without unbuttoning its chinstrap.37 Improperly worn helmets cannot prevent injury as well as properly worn helmets can.

 

 

Cervical Spine Injuries

Whereas American football is associated with a higher annual number of nonfatal catastrophic neck injuries, hockey has a 3 to 6 times higher incidence of cervical spine injuries and spinal cord damage.38,39 A Canadian Ice Hockey Spinal Injuries Registry review of the period 2006 to 2011 identified 44 cervical spine injuries, 7.3 per year on average.40 Severe injury, defined as complete motor and sensory loss, complete motor loss and incomplete sensory, or complete motor loss, occurred in 4 (9.1%) of the 44 injured players. In hockey, a major mechanism of cervical spine injury is an axial load to the slightly flexed spine.39 Of 355 hockey-related cervical spine injuries in a Canada study, 95 (35.5%) were caused by a check from behind.40,41 The Canadian neurosurgeons’ work led to rule changes prohibiting checks from behind, and this prohibition has reduced the incidence of cervical spine injuries in ice hockey.38,40

Team physicians should be comfortable managing serious neck and spine injuries on the ice. Initial evaluation should follow the standard ABCs (airway, breathing, circulation). The physician places a hand on each side of the head to stabilize the neck until the initial examination is complete. The goal is to minimize cervical spine motion until transportation to the hospital for advanced imaging and definitive treatment.37 The decision to remove or leave on the helmet is now controversial. Hockey helmets differ from football helmets in that their chinstraps do not afford significant cervical stabilization, and the helmets have less padding and cover less of the head; in addition, a shockingly high percentage of hockey players do not wear properly fitting helmets.37 In one study, 3-dimensional motion analysis of a hockey player during the logroll technique showed less transverse and sagittal cervical plane motion with the helmet removed than with the helmet (properly fitting or not) in place; the authors recommended removing the helmet to limit extraneous cervical spine motion during the technique.37 However, 2 other studies found that helmet removal can result in significantly increased cervical spine motion of the immobilized hockey player.42,43Recommendation 4 of the recently released interassociation consensus statement of the National Athletic Trainers’ Association reads, “Protective athletic equipment should be removed before transport to an emergency facility for an athlete-patient with suspected cervical spine instability.”44 This represents a shift from leaving the helmet and shoulder pads in place. For ice hockey players with suspected cervical spine injury, more research is needed on cervical motion during the entire sequence—partial logrolls, spine-boarding, placement of cervical collar before or after logroll, and different immobilization techniques for transport.37

The athlete must be carefully transferred to a spine board with either logroll or lift-and-slide. Although an extrication cervical collar can be placed before the spine board is placed, the effectiveness of this collar in executing the spine-board transfer is not proven.45 When the player is on the spine board, the head can be secured with pads and straps en route to the hospital.

Return-to-Play Criteria for Cervical Spine Injuries There is no clear consensus on return-to-play guidelines for cervical spine injuries in athletes.46

Table 5.
Although the literature lacks a standardized protocol, 4 fundamental criteria can be applied to a hockey player returning to the ice: The player should be pain-free and have full cervical neck motion, return of full strength, and no evidence of residual neurologic injury47 (Table 5).

Shoulder Injuries

For hockey players, the upper extremity traditionally has been considered a well-protected area.48 However, shoulder pads are considerably more flexible in hockey than in football and other collision sports. In addition, hockey gloves allow a fair amount of motion for stick handling, and the wrist may be in maximal flexion or extension when a hit against the boards or the ice occurs. Open-ice checking, board collisions, and hockey stick use have been postulated as reasons for the high incidence of upper extremity injuries in hockey. Researchers in Finland found that upper extremity injuries accounted for up to 31% of all hockey injuries.49 More than 50% of these injuries resulted from checking or board collisions. Furthermore, study findings highlighted a low rate of injury in younger players and indicated the rate increases with age.49,50

In hockey players, the acromioclavicular (AC) joint is the most commonly injured shoulder structure.51 The mechanism of injury can be a board collision or an open-ice hit, but most often is a direct blow to the shoulder. The collision disrupts the AC joint and can sprain or tear the coracoclavicular ligaments. The Rockwood classification is used to categorize AC joint injuries (Figure 2).

Figure 2.
Physical examination reveals swelling and tenderness at the joint. Skin tenting can occur with type III and type V injuries, and posterior deformity with type IV. We recommend initially obtaining anteroposterior (AP), scapular-Y, and axillary radiographs in cases of suspected AC joint injury. Weighted views are unnecessary and can exacerbate pain in acutely injured players.

Initial management involves icing the AC joint and placing a sling for comfort. Type I and type II injuries can be managed with progressive range-of-motion (ROM) exercises, strengthening, cryotherapy, and a period of rest. Treatment of type III injuries remains controversial,52 but in hockey players these injuries are almost always treated nonoperatively. Return to play requires full motion, normal strength, and minimal discomfort. Players return a few days to 2 weeks after a grade I injury; recovery from grade II injuries may take 2 to 3 weeks, and recovery from grade III injuries, 6 to 12 weeks. Surgical treatment is usually required in type IV and type V injuries, but we have had experience treating these injuries nonoperatively in high-level players. AC joint reinjury in hockey players is common, and surgical treatment should be approached cautiously, as delayed fracture after return to sport has been reported.53 Special precautions should be taken in collision athletes who undergo AC joint reconstruction. In the anatomical reconstruction described by Carofino and Mazzocca,54 2 holes are drilled in the clavicle; these holes are a potential source of fracture when the collision athlete returns to sport (Figure 3).
Figure 3.
Some authors recommend drilling only 1 hole in order to minimize the risk, but doing so may come at the price of mild anteriorization of the clavicle with this nonanatomical technique. As the optimal surgical treatment for AC joints remains controversial, there is no consensus at this time.

Clavicle fracture is another common hockey injury.55 Studies have shown clavicle fractures proportionally occur most often in people 15 to 19 years old.49 The injury presents with pain and deformity over the clavicle; in more severe fractures, skin tenting is identified. Initial management of suspected clavicle fracture includes cryotherapy, sling, and radiographs. Radiographs should include an AP view and then a 45° cephalad view, which eliminates overshadowing from the ribs. Most clavicle fractures are successfully managed nonoperatively, though there is evidence that significantly displaced or comminuted fractures have better union rates and shoulder function when treated with open reduction and internal fixation.56 After a clavicle fracture, return to skating and noncontact practice usually takes 8 weeks, with return to full contact occurring around 12 weeks.

Sternoclavicular injuries are relatively uncommon, but potentially serious. Special attention should also be given to adolescent athletes with sternoclavicular pain. Although sternoclavicular dislocations have been reported in hockey players, instead these likely are fractures involving the medial clavicle physis.57
Figure 4.
All athletes younger than 25 years carry a risk for this injury pattern, as that age is when the medial clavicle physis closes (Figures 4A-4C). Posterior sternoclavicular injuries should be taken to the operating room for closed versus possible open reduction with a cardiothoracic surgeon on standby (Figure 4D).

The shoulder is the most commonly dislocated major joint, and the incidence of shoulder dislocation in elite hockey players is 8% to 21%.50,58 Anterior shoulder instability occurs from a fall with the shoulder in an abducted, externally rotated and extended position or from a direct anteriorly placed impact to the posterior shoulder. We recommend taking players off the ice for evaluation. Depending on physician comfort, the shoulder can be reduced in the training room, and the athlete sent for radiographs after reduction. If resources or support for closed reduction is not available at the rink, the athlete should be sent to the ED. Initial radiographic evaluation of a player with shoulder injury begins with plain radiographs, including a true AP (Grashey) view with the humerus in neutral, internal, and external rotation and an axillary view. The axillary radiograph is crucial in determining anterior or posterior dislocation. If the patient cannot tolerate the pain associated with having an axillary radiograph taken, a Velpeau radiograph can be used. This radiograph is taken with the patient’s arm in a sling and with the patient leaning back 30° while the x-ray beam is directed superior to inferior.

CT is performed for a suspected osseous injury. CT is more accurate than plain radiographs in showing glenoid and humeral fractures in the acute setting as well as the amount of bone loss in the case of chronic instability. Magnetic resonance arthrography is the imaging modality of choice for the diagnoses of capsulolabral injury.

After shoulder reduction, treatment with a sling, cryotherapy, and a nonsteroidal anti-inflammatory drug is initiated. In a Minnesota study of nonoperative management of shoulder instability, 9 of 10 hockey players were able to return to play the same season, and 6 of the 10 required surgery at the end of the season.59
Figure 5.
We usually recommend focusing initial physical therapy on joint rehabilitation with an emphasis on ROM and strength. We typically recommend players use a Sully brace when players return to the ice59 (Figure 5).

Compared with noncontact athletes, hockey players and other collision athletes are at increased risk for recurrence.60-62 For collision athletes who want to continue playing their sport after recurrent instability, surgery is recommended. A shoulder instability study in Toronto found that more than 54% of 24 professional hockey players had associated Hill-Sachs lesions, but only 3 shoulders (12.5%) had glenoid defects.50 Arthroscopic and open techniques both demonstrate good results, and identification of bone loss can help determine which surgery to recommend.63 Hockey players can usually return to sport 6 months after shoulder stabilization.

Another important consideration in managing shoulder instability in hockey players is shoulder dominance, which determines stick grip. A left-handed player places the right hand on top of the stick for support, but most of the motion associated with shooting the puck—including abduction and external rotation—occurs with the left shoulder. Thus, a left-handed player with a history of previous left-side shoulder dislocation may dislocate with each shot, but a right-handed player with left shoulder instability may have considerably less trouble on the ice.58Shoulder and rotator cuff contusions (RCCs) occur in hockey and other collision sports.49,64 RCCs almost always result from a direct blow to the shoulder, and present with shoulder function loss, weakness, and pain.
Figure 6.
In some cases, RCCs that alter shoulder function can result in missed games and practices. RCC, an acute shoulder injury in an athlete with prior normal RC function, is followed by recovery of RC function—in contrast to tears, which can cause prolonged loss of function and strength.64 RCCs can involve the enthesis, the tendon, the myotendinous junction, or the muscle belly (Figures 6A, 6B). On examination, a hockey player with RCC has decreased active ROM with weakness in external rotation with the arm in 90° of abduction and with scapular plane elevation.
Table 6.
We recommend the treatment protocol outlined by Cohen and colleagues64 (Table 6). Return to ice is allowed after full shoulder ROM and strength have returned. Average time missed is usually about 1 week.

 

 

Summary

Hockey is a high-speed collision sport with one of the highest injury rates among all sports. Physicians caring for youth, amateur, and senior hockey teams see a range of acute head, neck, and shoulder injuries. Although treatment of eye injuries, dental injuries, and concussions is not always considered orthopedic care, an orthopedic surgeon who is covering hockey needs to be comfortable managing these injuries acutely. Quality rink-side care minimizes the impact of the injury, maximizes the functional result, and expedites the safe return of the injured player back to the ice.

Am J Orthop. 2017;46(3):123-134. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

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47. Huang P, Anissipour A, McGee W, Lemak L. Return-to-play recommendations after cervical, thoracic, and lumbar spine injuries: a comprehensive review. Sports Health. 2016;8(1):19-25.

48. Shindle MK, Marx RG, Kelly BT, Bisson L, Burke CJ 3rd. Hockey injuries: a pediatric sport update. Curr Opin Pediatr. 2010;22(1):54-60.

49. Molsa J, Kujala U, Myllynen P, Torstila I, Airaksinen O. Injuries to the upper extremity in ice hockey: analysis of a series of 760 injuries. Am J Sports Med. 2003;31(5):751-757.

50. Dwyer T, Petrera M, Bleakney R, Theodoropoulos JS. Shoulder instability in ice hockey players: incidence, mechanism, and MRI findings. Clin Sports Med. 2013;32(4):803-813.

51. LaPrade RF, Wijdicks CA, Griffith CJ. Division I intercollegiate ice hockey team coverage. Br J Sports Med. 2009;43(13):1000-1005.

52. Willimon SC, Gaskill TR, Millett PJ. Acromioclavicular joint injuries: anatomy, diagnosis, and treatment. Phys Sportsmed. 2011;39(1):116-122.

53. Martetschlager F, Horan MP, Warth RJ, Millett PJ. Complications after anatomic fixation and reconstruction of the coracoclavicular ligaments. Am J Sports Med. 2013;41(12):2896-2903.

54. Carofino BC, Mazzocca AD. The anatomic coracoclavicular ligament reconstruction: surgical technique and indications. J Shoulder Elbow Surg. 2010;19(2 suppl):37-46.

55. Laprade RF, Surowiec RK, Sochanska AN, et al. Epidemiology, identification, treatment and return to play of musculoskeletal-based ice hockey injuries. Br J Sports Med. 2014;48(1):4-10.

56. Canadian Orthopaedic Trauma Society. Nonoperative treatment compared with plate fixation of displaced midshaft clavicular fractures. A multicenter, randomized clinical trial. J Bone Joint Surg Am. 2007;89(1):1-10.

57. Lee JT, Nasreddine AY, Black EM, Bae DS, Kocher MS. Posterior sternoclavicular joint injuries in skeletally immature patients. J Pediatr Orthop. 2014;34(4):369-375.

58. Hovelius L. Shoulder dislocation in Swedish ice hockey players. Am J Sports Med. 1978;6(6):373-377.

59. Buss DD, Lynch GP, Meyer CP, Huber SM, Freehill MQ. Nonoperative management for in-season athletes with anterior shoulder instability. Am J Sports Med. 2004;32(6):1430-1433.

60. Mazzocca AD, Brown FM Jr, Carreira DS, Hayden J, Romeo AA. Arthroscopic anterior shoulder stabilization of collision and contact athletes. Am J Sports Med. 2005;33(1):52-60.

61. Harris JD, Romeo AA. Arthroscopic management of the contact athlete with instability. Clin Sports Med. 2013;32(4):709-730.

62. Cho NS, Hwang JC, Rhee YG. Arthroscopic stabilization in anterior shoulder instability: collision athletes versus noncollision athletes. Arthroscopy. 2006;22(9):947-953.

63. Griffin JW, Brockmeier SF. Shoulder instability with concomitant bone loss in the athlete. Orthop Clin North Am. 2015;46(1):89-103.

64. Cohen SB, Towers JD, Bradley JP. Rotator cuff contusions of the shoulder in professional football players: epidemiology and magnetic resonance imaging findings. Am J Sports Med. 2007;35(3):442-447.

65. Lorentzon R, Wedrèn H, Pietilä T. Incidence, nature, and causes of ice hockey injuries. A three-year prospective study of a Swedish elite ice hockey team. Am J Sports Med. 1988;16(4):392-396.

66. Stuart MJ, Smith A. Injuries in Junior A ice hockey. A three-year prospective study. Am J Sports Med. 1995;23(4):458-461.

67. Voaklander DC, Saunders LD, Quinney HA, Macnab RB. Epidemiology of recreational and old-timer ice hockey injuries. Clin J Sport Med. 1996;6(1):15-21.

68. Mölsä J, Airaksinen O, Näsman O, Torstila I. Ice hockey injuries in Finland. A prospective epidemiologic study. Am J Sports Med. 1997;25(4):495-499.

69. Ferrara MS, Schurr KT. Intercollegiate ice hockey injuries: a casual analysis. Clin J Sport Med. 1999;9(1):30-33.

70. Pinto M, Kuhn JE, Greenfield ML, Hawkins RJ. Prospective analysis of ice hockey injuries at the Junior A level over the course of one season. Clin J Sport Med. 1999;9(2):70-74.

71. Emery CA, Meeuwisse WH. Injury rates, risk factors, and mechanisms of injury in minor hockey. Am J Sports Med. 2006;34(12):1960-1969.

72. Kuzuhara K, Shimamoto H, Mase Y. Ice hockey injuries in a Japanese elite team: a 3-year prospective study. J Athl Train. 2009;44(2):208-214.

73. Rishiraj N, Lloyd-Smith R, Lorenz T, Niven B, Michel M. University men’s ice hockey: rates and risk of injuries over 6-years. J Sports Med Phys Fitness. 2009;49(2):159-166.

74. Tuominen M, Stuart MJ, Aubry M, Kannus P, Parkkari J. Injuries in men’s international ice hockey: a 7-year study of the International Ice Hockey Federation Adult World Championship Tournaments and Olympic Winter Games. Br J Sports Med. 2015;49(1):30-36.

75. Heckman JD, Bucholz RW. In: Rockwood CA, Green DP, Heckman JD, Bucholz RW, eds. Rockwood and Green’s Fractures in Adults, Volume 1. Philadelphia, PA: Lippincott Williams & Wilkins; 2001.

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43. Metz CM, Kuhn JE, Greenfield ML. Cervical spine alignment in immobilized hockey players: radiographic analysis with and without helmets and shoulder pads. Clin J Sport Med. 1998;8(2):92-95.

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45. Del Rossi G, Heffernan TP, Horodyski M, Rechtine GR. The effectiveness of extrication collars tested during the execution of spine-board transfer techniques. Spine J. 2004;4(6):619-623.

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47. Huang P, Anissipour A, McGee W, Lemak L. Return-to-play recommendations after cervical, thoracic, and lumbar spine injuries: a comprehensive review. Sports Health. 2016;8(1):19-25.

48. Shindle MK, Marx RG, Kelly BT, Bisson L, Burke CJ 3rd. Hockey injuries: a pediatric sport update. Curr Opin Pediatr. 2010;22(1):54-60.

49. Molsa J, Kujala U, Myllynen P, Torstila I, Airaksinen O. Injuries to the upper extremity in ice hockey: analysis of a series of 760 injuries. Am J Sports Med. 2003;31(5):751-757.

50. Dwyer T, Petrera M, Bleakney R, Theodoropoulos JS. Shoulder instability in ice hockey players: incidence, mechanism, and MRI findings. Clin Sports Med. 2013;32(4):803-813.

51. LaPrade RF, Wijdicks CA, Griffith CJ. Division I intercollegiate ice hockey team coverage. Br J Sports Med. 2009;43(13):1000-1005.

52. Willimon SC, Gaskill TR, Millett PJ. Acromioclavicular joint injuries: anatomy, diagnosis, and treatment. Phys Sportsmed. 2011;39(1):116-122.

53. Martetschlager F, Horan MP, Warth RJ, Millett PJ. Complications after anatomic fixation and reconstruction of the coracoclavicular ligaments. Am J Sports Med. 2013;41(12):2896-2903.

54. Carofino BC, Mazzocca AD. The anatomic coracoclavicular ligament reconstruction: surgical technique and indications. J Shoulder Elbow Surg. 2010;19(2 suppl):37-46.

55. Laprade RF, Surowiec RK, Sochanska AN, et al. Epidemiology, identification, treatment and return to play of musculoskeletal-based ice hockey injuries. Br J Sports Med. 2014;48(1):4-10.

56. Canadian Orthopaedic Trauma Society. Nonoperative treatment compared with plate fixation of displaced midshaft clavicular fractures. A multicenter, randomized clinical trial. J Bone Joint Surg Am. 2007;89(1):1-10.

57. Lee JT, Nasreddine AY, Black EM, Bae DS, Kocher MS. Posterior sternoclavicular joint injuries in skeletally immature patients. J Pediatr Orthop. 2014;34(4):369-375.

58. Hovelius L. Shoulder dislocation in Swedish ice hockey players. Am J Sports Med. 1978;6(6):373-377.

59. Buss DD, Lynch GP, Meyer CP, Huber SM, Freehill MQ. Nonoperative management for in-season athletes with anterior shoulder instability. Am J Sports Med. 2004;32(6):1430-1433.

60. Mazzocca AD, Brown FM Jr, Carreira DS, Hayden J, Romeo AA. Arthroscopic anterior shoulder stabilization of collision and contact athletes. Am J Sports Med. 2005;33(1):52-60.

61. Harris JD, Romeo AA. Arthroscopic management of the contact athlete with instability. Clin Sports Med. 2013;32(4):709-730.

62. Cho NS, Hwang JC, Rhee YG. Arthroscopic stabilization in anterior shoulder instability: collision athletes versus noncollision athletes. Arthroscopy. 2006;22(9):947-953.

63. Griffin JW, Brockmeier SF. Shoulder instability with concomitant bone loss in the athlete. Orthop Clin North Am. 2015;46(1):89-103.

64. Cohen SB, Towers JD, Bradley JP. Rotator cuff contusions of the shoulder in professional football players: epidemiology and magnetic resonance imaging findings. Am J Sports Med. 2007;35(3):442-447.

65. Lorentzon R, Wedrèn H, Pietilä T. Incidence, nature, and causes of ice hockey injuries. A three-year prospective study of a Swedish elite ice hockey team. Am J Sports Med. 1988;16(4):392-396.

66. Stuart MJ, Smith A. Injuries in Junior A ice hockey. A three-year prospective study. Am J Sports Med. 1995;23(4):458-461.

67. Voaklander DC, Saunders LD, Quinney HA, Macnab RB. Epidemiology of recreational and old-timer ice hockey injuries. Clin J Sport Med. 1996;6(1):15-21.

68. Mölsä J, Airaksinen O, Näsman O, Torstila I. Ice hockey injuries in Finland. A prospective epidemiologic study. Am J Sports Med. 1997;25(4):495-499.

69. Ferrara MS, Schurr KT. Intercollegiate ice hockey injuries: a casual analysis. Clin J Sport Med. 1999;9(1):30-33.

70. Pinto M, Kuhn JE, Greenfield ML, Hawkins RJ. Prospective analysis of ice hockey injuries at the Junior A level over the course of one season. Clin J Sport Med. 1999;9(2):70-74.

71. Emery CA, Meeuwisse WH. Injury rates, risk factors, and mechanisms of injury in minor hockey. Am J Sports Med. 2006;34(12):1960-1969.

72. Kuzuhara K, Shimamoto H, Mase Y. Ice hockey injuries in a Japanese elite team: a 3-year prospective study. J Athl Train. 2009;44(2):208-214.

73. Rishiraj N, Lloyd-Smith R, Lorenz T, Niven B, Michel M. University men’s ice hockey: rates and risk of injuries over 6-years. J Sports Med Phys Fitness. 2009;49(2):159-166.

74. Tuominen M, Stuart MJ, Aubry M, Kannus P, Parkkari J. Injuries in men’s international ice hockey: a 7-year study of the International Ice Hockey Federation Adult World Championship Tournaments and Olympic Winter Games. Br J Sports Med. 2015;49(1):30-36.

75. Heckman JD, Bucholz RW. In: Rockwood CA, Green DP, Heckman JD, Bucholz RW, eds. Rockwood and Green’s Fractures in Adults, Volume 1. Philadelphia, PA: Lippincott Williams & Wilkins; 2001.

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The American Journal of Orthopedics - 46(3)
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The American Journal of Orthopedics - 46(3)
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