Type 2 Diabetes Challenge Center

The history and findings in this case are suggestive of chronic kidney disease (CKD).

CKD affects between 8% and 16% of the population worldwide. Risk factors for CKD are numerous and include T2D, hypertension, and prediabetes. Diabetes is the leading cause of CKD. Up to 40% of patients with diabetes develop diabetic kidney disease, which can progress to end-stage renal disease (ESRD) requiring dialysis or kidney transplantation. In fact, diabetic kidney disease is the top cause of ESRD in the United States.

Diagnostic criteria for CKD include elevated urinary albumin excretion (albuminuria) and/or eGFR < 60 mL/1.73 m² that persists for more than 3 months. The normal presentation of diabetic kidney disease includes long-standing diabetes, retinopathy, albuminuria without gross hematuria, and gradually progressive decline of eGFR. However, signs of diabetic kidney disease may be present in patients at diagnosis or without retinopathy in T2D. Reduced eGFR without albuminuria has been frequently reported in both type 1 diabetes (T1D) and T2D and is becoming increasingly common as the prevalence of diabetes rises in the United States.

Chronic kidney disease is usually identified through routine screening with serum chemistry profile and urine studies or as an incidental finding. Less often, patients may present with symptoms, such as gross hematuria, "foamy urine" (a sign of albuminuria), nocturia, flank pain, or decreased urine output. In advanced cases, patients may report fatigue, poor appetite, nausea, vomiting, a metallic taste, unintentional weight loss, pruritus, changes in mental status, dyspnea, and/or peripheral edema.

The American Diabetes Association (ADA) 2023 Standards of Care in Diabetes describes five stages of CKD. Stages 1-2 are defined by evidence of high albuminuria with eGFR ≥ 60 mL/min/1.73 m², while stages 3-5 are defined by progressively lower ranges of eGFR. Of note, at any eGFR, the degree of albuminuria is associated with risk for cardiovascular disease, CKD progression, and mortality. Thus, as noted by the ADA Standards, both eGFR and albuminuria should be used to guide treatment decisions; additionally, eGFR levels are essential for modifying drug dosages or restrictions of use, and the degree of albuminuria should influence selection of antihypertensive agents and glucose-lowering medications.

According to the ADA 2023 Standards of Care in Diabetes, for people with non–dialysis-dependent CKD, dietary protein intake should be ∼0.8 g/kg body weight per day (the recommended daily allowance), as this level has been shown to slow GFR decline compared with higher levels of dietary protein intake, with evidence of a greater effect over time. Conversely, higher levels of dietary protein intake (> 20% of daily calories from protein or > 1.3 g/kg/d) have been associated with increased albuminuria, more rapid kidney function loss, and cardiovascular disease mortality. For patients on dialysis, higher levels of dietary protein intake should be considered, because malnutrition is a significant problem in some of these patients.

Urinary excretion of sodium and potassium may be impaired in patients with reduced eGFR. Thus, restriction of dietary sodium to < 2300 mg/d may help to control blood pressure and reduce cardiovascular risk, and restriction of dietary potassium may be necessary to control serum potassium concentration. 

Intensive glycemic control with the goal of achieving near-normoglycemia has been shown to delay the onset and progression of albuminuria and reduced eGFR in patients with diabetes. Insulin alone was used to lower blood glucose in the Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) study of T1D while a variety of agents were used in clinical trials of T2D, supporting the conclusion that glycemic control itself helps prevent CKD and its progression. However, the presence of CKD affects the risks and benefits of intensive glycemic control and several glucose-lowering medications. In the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial of T2D, increased adverse effects of intensive glycemic control (hypoglycemia and mortality) were seen among patients with kidney disease at baseline. Moreover, it may take at least 2 years to see improved eGFR outcomes as an effect of intensive glycemic control. Therefore, in some patients with prevalent CKD and substantial comorbidity, target A1c levels may be less intensive.

According to guidance from the US Food and Drug Administration, eGFR should be monitored while taking metformin and metformin is contraindicated in patients with an eGFR < 30 mL/min/1.73 m². Clinicians should assess the benefits and risks of continuing treatment when eGFR falls to < 45 mL/min/1.73 m². 

The ADA recommends that sodium–glucose cotransporter 2 inhibitors be given to all patients with stage 3 CKD or higher and T2D, regardless of glycemic control, as they have been shown to delay CKD progression and reduce heart failure risk independent of glycemic control. Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) also have direct effects on the kidney and have been reported to improve renal outcomes compared with placebo. In patients for whom cardiovascular risk is a predominant problem, the ADA suggests using GLP-1 RAs for cardiovascular risk reduction.

Comprehensive guidance on the management of CKD in patients with T2D is available in the ADA 2023 Standards of Care in Diabetes.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The history and findings in this case are suggestive of chronic kidney disease (CKD).

CKD affects between 8% and 16% of the population worldwide. Risk factors for CKD are numerous and include T2D, hypertension, and prediabetes. Diabetes is the leading cause of CKD. Up to 40% of patients with diabetes develop diabetic kidney disease, which can progress to end-stage renal disease (ESRD) requiring dialysis or kidney transplantation. In fact, diabetic kidney disease is the top cause of ESRD in the United States.

Diagnostic criteria for CKD include elevated urinary albumin excretion (albuminuria) and/or eGFR < 60 mL/1.73 m² that persists for more than 3 months. The normal presentation of diabetic kidney disease includes long-standing diabetes, retinopathy, albuminuria without gross hematuria, and gradually progressive decline of eGFR. However, signs of diabetic kidney disease may be present in patients at diagnosis or without retinopathy in T2D. Reduced eGFR without albuminuria has been frequently reported in both type 1 diabetes (T1D) and T2D and is becoming increasingly common as the prevalence of diabetes rises in the United States.

Chronic kidney disease is usually identified through routine screening with serum chemistry profile and urine studies or as an incidental finding. Less often, patients may present with symptoms, such as gross hematuria, "foamy urine" (a sign of albuminuria), nocturia, flank pain, or decreased urine output. In advanced cases, patients may report fatigue, poor appetite, nausea, vomiting, a metallic taste, unintentional weight loss, pruritus, changes in mental status, dyspnea, and/or peripheral edema.

The American Diabetes Association (ADA) 2023 Standards of Care in Diabetes describes five stages of CKD. Stages 1-2 are defined by evidence of high albuminuria with eGFR ≥ 60 mL/min/1.73 m², while stages 3-5 are defined by progressively lower ranges of eGFR. Of note, at any eGFR, the degree of albuminuria is associated with risk for cardiovascular disease, CKD progression, and mortality. Thus, as noted by the ADA Standards, both eGFR and albuminuria should be used to guide treatment decisions; additionally, eGFR levels are essential for modifying drug dosages or restrictions of use, and the degree of albuminuria should influence selection of antihypertensive agents and glucose-lowering medications.

According to the ADA 2023 Standards of Care in Diabetes, for people with non–dialysis-dependent CKD, dietary protein intake should be ∼0.8 g/kg body weight per day (the recommended daily allowance), as this level has been shown to slow GFR decline compared with higher levels of dietary protein intake, with evidence of a greater effect over time. Conversely, higher levels of dietary protein intake (> 20% of daily calories from protein or > 1.3 g/kg/d) have been associated with increased albuminuria, more rapid kidney function loss, and cardiovascular disease mortality. For patients on dialysis, higher levels of dietary protein intake should be considered, because malnutrition is a significant problem in some of these patients.

Urinary excretion of sodium and potassium may be impaired in patients with reduced eGFR. Thus, restriction of dietary sodium to < 2300 mg/d may help to control blood pressure and reduce cardiovascular risk, and restriction of dietary potassium may be necessary to control serum potassium concentration. 

Intensive glycemic control with the goal of achieving near-normoglycemia has been shown to delay the onset and progression of albuminuria and reduced eGFR in patients with diabetes. Insulin alone was used to lower blood glucose in the Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) study of T1D while a variety of agents were used in clinical trials of T2D, supporting the conclusion that glycemic control itself helps prevent CKD and its progression. However, the presence of CKD affects the risks and benefits of intensive glycemic control and several glucose-lowering medications. In the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial of T2D, increased adverse effects of intensive glycemic control (hypoglycemia and mortality) were seen among patients with kidney disease at baseline. Moreover, it may take at least 2 years to see improved eGFR outcomes as an effect of intensive glycemic control. Therefore, in some patients with prevalent CKD and substantial comorbidity, target A1c levels may be less intensive.

According to guidance from the US Food and Drug Administration, eGFR should be monitored while taking metformin and metformin is contraindicated in patients with an eGFR < 30 mL/min/1.73 m². Clinicians should assess the benefits and risks of continuing treatment when eGFR falls to < 45 mL/min/1.73 m². 

The ADA recommends that sodium–glucose cotransporter 2 inhibitors be given to all patients with stage 3 CKD or higher and T2D, regardless of glycemic control, as they have been shown to delay CKD progression and reduce heart failure risk independent of glycemic control. Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) also have direct effects on the kidney and have been reported to improve renal outcomes compared with placebo. In patients for whom cardiovascular risk is a predominant problem, the ADA suggests using GLP-1 RAs for cardiovascular risk reduction.

Comprehensive guidance on the management of CKD in patients with T2D is available in the ADA 2023 Standards of Care in Diabetes.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The history and findings in this case are suggestive of chronic kidney disease (CKD).

CKD affects between 8% and 16% of the population worldwide. Risk factors for CKD are numerous and include T2D, hypertension, and prediabetes. Diabetes is the leading cause of CKD. Up to 40% of patients with diabetes develop diabetic kidney disease, which can progress to end-stage renal disease (ESRD) requiring dialysis or kidney transplantation. In fact, diabetic kidney disease is the top cause of ESRD in the United States.

Diagnostic criteria for CKD include elevated urinary albumin excretion (albuminuria) and/or eGFR < 60 mL/1.73 m² that persists for more than 3 months. The normal presentation of diabetic kidney disease includes long-standing diabetes, retinopathy, albuminuria without gross hematuria, and gradually progressive decline of eGFR. However, signs of diabetic kidney disease may be present in patients at diagnosis or without retinopathy in T2D. Reduced eGFR without albuminuria has been frequently reported in both type 1 diabetes (T1D) and T2D and is becoming increasingly common as the prevalence of diabetes rises in the United States.

Chronic kidney disease is usually identified through routine screening with serum chemistry profile and urine studies or as an incidental finding. Less often, patients may present with symptoms, such as gross hematuria, "foamy urine" (a sign of albuminuria), nocturia, flank pain, or decreased urine output. In advanced cases, patients may report fatigue, poor appetite, nausea, vomiting, a metallic taste, unintentional weight loss, pruritus, changes in mental status, dyspnea, and/or peripheral edema.

The American Diabetes Association (ADA) 2023 Standards of Care in Diabetes describes five stages of CKD. Stages 1-2 are defined by evidence of high albuminuria with eGFR ≥ 60 mL/min/1.73 m², while stages 3-5 are defined by progressively lower ranges of eGFR. Of note, at any eGFR, the degree of albuminuria is associated with risk for cardiovascular disease, CKD progression, and mortality. Thus, as noted by the ADA Standards, both eGFR and albuminuria should be used to guide treatment decisions; additionally, eGFR levels are essential for modifying drug dosages or restrictions of use, and the degree of albuminuria should influence selection of antihypertensive agents and glucose-lowering medications.

According to the ADA 2023 Standards of Care in Diabetes, for people with non–dialysis-dependent CKD, dietary protein intake should be ∼0.8 g/kg body weight per day (the recommended daily allowance), as this level has been shown to slow GFR decline compared with higher levels of dietary protein intake, with evidence of a greater effect over time. Conversely, higher levels of dietary protein intake (> 20% of daily calories from protein or > 1.3 g/kg/d) have been associated with increased albuminuria, more rapid kidney function loss, and cardiovascular disease mortality. For patients on dialysis, higher levels of dietary protein intake should be considered, because malnutrition is a significant problem in some of these patients.

Urinary excretion of sodium and potassium may be impaired in patients with reduced eGFR. Thus, restriction of dietary sodium to < 2300 mg/d may help to control blood pressure and reduce cardiovascular risk, and restriction of dietary potassium may be necessary to control serum potassium concentration. 

Intensive glycemic control with the goal of achieving near-normoglycemia has been shown to delay the onset and progression of albuminuria and reduced eGFR in patients with diabetes. Insulin alone was used to lower blood glucose in the Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) study of T1D while a variety of agents were used in clinical trials of T2D, supporting the conclusion that glycemic control itself helps prevent CKD and its progression. However, the presence of CKD affects the risks and benefits of intensive glycemic control and several glucose-lowering medications. In the Action to Control Cardiovascular Risk in Diabetes (ACCORD) trial of T2D, increased adverse effects of intensive glycemic control (hypoglycemia and mortality) were seen among patients with kidney disease at baseline. Moreover, it may take at least 2 years to see improved eGFR outcomes as an effect of intensive glycemic control. Therefore, in some patients with prevalent CKD and substantial comorbidity, target A1c levels may be less intensive.

According to guidance from the US Food and Drug Administration, eGFR should be monitored while taking metformin and metformin is contraindicated in patients with an eGFR < 30 mL/min/1.73 m². Clinicians should assess the benefits and risks of continuing treatment when eGFR falls to < 45 mL/min/1.73 m². 

The ADA recommends that sodium–glucose cotransporter 2 inhibitors be given to all patients with stage 3 CKD or higher and T2D, regardless of glycemic control, as they have been shown to delay CKD progression and reduce heart failure risk independent of glycemic control. Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) also have direct effects on the kidney and have been reported to improve renal outcomes compared with placebo. In patients for whom cardiovascular risk is a predominant problem, the ADA suggests using GLP-1 RAs for cardiovascular risk reduction.

Comprehensive guidance on the management of CKD in patients with T2D is available in the ADA 2023 Standards of Care in Diabetes.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's physical findings are consistent with a diagnosis of claw toe, which can be caused by diabetes-related peripheral neuropathy.

According to the International Diabetes Federation, diabetes currently affects approximately 537 million adults worldwide. The number of individuals living with diabetes is expected to exceed 640 million by 2030 and 780 million by 2045. In the United States, more than 37 million people are living with diabetes.

Foot complications related to diabetes represent a significant economic and social burden and can profoundly affect a patient's quality of life and medical outcomes. Common diabetes-related foot complications include foot deformity and peripheral neuropathy, both of which increase the risk for ulceration and amputation. The most common deformity is at the metatarsophalangeal joint (MTPJ). As many as 85% of patients with a history of ulcers and amputation have an MTPJ deformity such as claw toe or hammertoe.

Although they are often grouped together, claw toe and hammertoe have distinct features. Extended MTPJ, flexed proximal interphalangeal joint (PIPJ), and flexed distal interphalangeal joint (DIPJ) are characteristic of claw toe. While hammertoe also has extended MTPJ and flexed PIPJ, the DIPJ is extended rather than flexed. In both cases, the area of high pressure at risk for skin breakdown and ulceration is at the metatarsal head as a result of MTPJ hyperextension deformity. 

Prompt detection and care of diabetes-related foot complications can minimize progression and negative consequences on patients' health and quality of life. According to the American Diabetes Association, all patients with diabetes should undergo a comprehensive foot evaluation at least annually to identify risk factors for ulceration and amputation, which include foot deformities, poor glycemic control, peripheral neuropathy, cigarette smoking, preulcerative callus or corn, peripheral artery disease, chronic kidney disease, visual impairment, and a history of ulceration or amputation. When patients present with a history of ulceration or amputation, a foot inspection should be conducted at each visit. 

A comprehensive foot evaluation should include inspection of the skin, evaluation of any foot deformities, a neurologic assessment (10-g monofilament testing with at least one other assessment: pinprick, temperature, vibration), and a vascular assessment, including pulses in the legs and feet.

Patients should be educated on risk factors and appropriate management of foot-related complications, including the importance of effective glycemic control and daily monitoring of feet. Treatment may be medical, surgical, or both, as indicated by the individual patient's presentation. Conservative treatment approaches include footwear that is extra wide or deep, avoiding high-heeled and narrow-toed shoes, use of a metatarsal bar or pad, cushioning sleeves or stocking caps with silicon linings, and a longitudinal pad beneath the toes.

Complete recommendations on achieving glycemic control in T2D can be found in the 2022 American Diabetes Association Standards of Medical Care. Guidelines on foot care are also available.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's physical findings are consistent with a diagnosis of claw toe, which can be caused by diabetes-related peripheral neuropathy.

According to the International Diabetes Federation, diabetes currently affects approximately 537 million adults worldwide. The number of individuals living with diabetes is expected to exceed 640 million by 2030 and 780 million by 2045. In the United States, more than 37 million people are living with diabetes.

Foot complications related to diabetes represent a significant economic and social burden and can profoundly affect a patient's quality of life and medical outcomes. Common diabetes-related foot complications include foot deformity and peripheral neuropathy, both of which increase the risk for ulceration and amputation. The most common deformity is at the metatarsophalangeal joint (MTPJ). As many as 85% of patients with a history of ulcers and amputation have an MTPJ deformity such as claw toe or hammertoe.

Although they are often grouped together, claw toe and hammertoe have distinct features. Extended MTPJ, flexed proximal interphalangeal joint (PIPJ), and flexed distal interphalangeal joint (DIPJ) are characteristic of claw toe. While hammertoe also has extended MTPJ and flexed PIPJ, the DIPJ is extended rather than flexed. In both cases, the area of high pressure at risk for skin breakdown and ulceration is at the metatarsal head as a result of MTPJ hyperextension deformity. 

Prompt detection and care of diabetes-related foot complications can minimize progression and negative consequences on patients' health and quality of life. According to the American Diabetes Association, all patients with diabetes should undergo a comprehensive foot evaluation at least annually to identify risk factors for ulceration and amputation, which include foot deformities, poor glycemic control, peripheral neuropathy, cigarette smoking, preulcerative callus or corn, peripheral artery disease, chronic kidney disease, visual impairment, and a history of ulceration or amputation. When patients present with a history of ulceration or amputation, a foot inspection should be conducted at each visit. 

A comprehensive foot evaluation should include inspection of the skin, evaluation of any foot deformities, a neurologic assessment (10-g monofilament testing with at least one other assessment: pinprick, temperature, vibration), and a vascular assessment, including pulses in the legs and feet.

Patients should be educated on risk factors and appropriate management of foot-related complications, including the importance of effective glycemic control and daily monitoring of feet. Treatment may be medical, surgical, or both, as indicated by the individual patient's presentation. Conservative treatment approaches include footwear that is extra wide or deep, avoiding high-heeled and narrow-toed shoes, use of a metatarsal bar or pad, cushioning sleeves or stocking caps with silicon linings, and a longitudinal pad beneath the toes.

Complete recommendations on achieving glycemic control in T2D can be found in the 2022 American Diabetes Association Standards of Medical Care. Guidelines on foot care are also available.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

This patient's physical findings are consistent with a diagnosis of claw toe, which can be caused by diabetes-related peripheral neuropathy.

According to the International Diabetes Federation, diabetes currently affects approximately 537 million adults worldwide. The number of individuals living with diabetes is expected to exceed 640 million by 2030 and 780 million by 2045. In the United States, more than 37 million people are living with diabetes.

Foot complications related to diabetes represent a significant economic and social burden and can profoundly affect a patient's quality of life and medical outcomes. Common diabetes-related foot complications include foot deformity and peripheral neuropathy, both of which increase the risk for ulceration and amputation. The most common deformity is at the metatarsophalangeal joint (MTPJ). As many as 85% of patients with a history of ulcers and amputation have an MTPJ deformity such as claw toe or hammertoe.

Although they are often grouped together, claw toe and hammertoe have distinct features. Extended MTPJ, flexed proximal interphalangeal joint (PIPJ), and flexed distal interphalangeal joint (DIPJ) are characteristic of claw toe. While hammertoe also has extended MTPJ and flexed PIPJ, the DIPJ is extended rather than flexed. In both cases, the area of high pressure at risk for skin breakdown and ulceration is at the metatarsal head as a result of MTPJ hyperextension deformity. 

Prompt detection and care of diabetes-related foot complications can minimize progression and negative consequences on patients' health and quality of life. According to the American Diabetes Association, all patients with diabetes should undergo a comprehensive foot evaluation at least annually to identify risk factors for ulceration and amputation, which include foot deformities, poor glycemic control, peripheral neuropathy, cigarette smoking, preulcerative callus or corn, peripheral artery disease, chronic kidney disease, visual impairment, and a history of ulceration or amputation. When patients present with a history of ulceration or amputation, a foot inspection should be conducted at each visit. 

A comprehensive foot evaluation should include inspection of the skin, evaluation of any foot deformities, a neurologic assessment (10-g monofilament testing with at least one other assessment: pinprick, temperature, vibration), and a vascular assessment, including pulses in the legs and feet.

Patients should be educated on risk factors and appropriate management of foot-related complications, including the importance of effective glycemic control and daily monitoring of feet. Treatment may be medical, surgical, or both, as indicated by the individual patient's presentation. Conservative treatment approaches include footwear that is extra wide or deep, avoiding high-heeled and narrow-toed shoes, use of a metatarsal bar or pad, cushioning sleeves or stocking caps with silicon linings, and a longitudinal pad beneath the toes.

Complete recommendations on achieving glycemic control in T2D can be found in the 2022 American Diabetes Association Standards of Medical Care. Guidelines on foot care are also available.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The American Diabetes Association (ADA) position statement on diabetic retinopathy states that hyperglycemia has been the most consistently associated risk factor for retinopathy. A large and consistent set of observational studies and clinical trials confirms the association of poor glucose control and retinopathy. 

The Diabetes Control and Complications Trial (DCCT), a randomized controlled clinical trial of intensive glycemic control vs conventional glycemic control in people with type 1 diabetes (T1D), demonstrated that intensive therapy reduced the development or progression of diabetic retinopathy by 34%-76%. The DCCT also demonstrated a definitive relationship between hyperglycemia and diabetic microvascular complications, including retinopathy. Early treatment with intensive therapy was effective.

The UK Prospective Diabetes Study (UKPDS) of patients with newly diagnosed T2D conclusively demonstrated that improved blood glucose control reduced the risk for retinopathy and nephropathy and, possibly, neuropathy. The overall microvascular complication rate was decreased by 25% in patients receiving intensive therapy vs conventional therapy. Epidemiologic analysis of the UKPDS data showed a continuous relationship between the risk for microvascular complications and glycemia, such that every percentage-point decrease in A1c (eg, 9% to 8%) was associated with a 35% reduction in the risk for microvascular complications.

More recently, the ACCORD trial of medical therapies demonstrated that intensive glycemic control reduced the risk for progression of diabetic retinopathy in people with T2D of 10 years' duration. This study included 2856 ACCORD participants enrolled in the ACCORD Eye Study and followed for 4 years.

The ADA recommends screening by an ophthalmologist for diabetic retinopathy within 5 years of the diagnosis of T1D and at the time of diagnosis of T2D. Women with preexisting diabetes who are planning pregnancy or who have become pregnant should be screened before pregnancy or in the first trimester.

While optimization of blood glucose, blood pressure, and serum lipid levels in conjunction with appropriately scheduled dilated eye examinations can substantially decrease the risk for vision loss from diabetic retinopathy, a significant proportion of those affected with diabetes develop diabetic macular edema or proliferative changes that require intervention. ADA treatment recommendations are:

•    Refer patients with any level of macular edema, severe nonproliferative diabetic retinopathy (a precursor of proliferative diabetic retinopathy), or proliferative diabetic retinopathy to an ophthalmologist knowledgeable and experienced in the management and treatment of diabetic retinopathy.
•    Laser photocoagulation therapy reduces the risk for vision loss in patients with high-risk proliferative diabetic retinopathy and, in some cases, severe nonproliferative diabetic retinopathy.
•    Intravitreous injections of anti–vascular endothelial growth factor are indicated for central-involved diabetic macular edema, which occurs beneath the foveal center and may threaten reading vision.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The American Diabetes Association (ADA) position statement on diabetic retinopathy states that hyperglycemia has been the most consistently associated risk factor for retinopathy. A large and consistent set of observational studies and clinical trials confirms the association of poor glucose control and retinopathy. 

The Diabetes Control and Complications Trial (DCCT), a randomized controlled clinical trial of intensive glycemic control vs conventional glycemic control in people with type 1 diabetes (T1D), demonstrated that intensive therapy reduced the development or progression of diabetic retinopathy by 34%-76%. The DCCT also demonstrated a definitive relationship between hyperglycemia and diabetic microvascular complications, including retinopathy. Early treatment with intensive therapy was effective.

The UK Prospective Diabetes Study (UKPDS) of patients with newly diagnosed T2D conclusively demonstrated that improved blood glucose control reduced the risk for retinopathy and nephropathy and, possibly, neuropathy. The overall microvascular complication rate was decreased by 25% in patients receiving intensive therapy vs conventional therapy. Epidemiologic analysis of the UKPDS data showed a continuous relationship between the risk for microvascular complications and glycemia, such that every percentage-point decrease in A1c (eg, 9% to 8%) was associated with a 35% reduction in the risk for microvascular complications.

More recently, the ACCORD trial of medical therapies demonstrated that intensive glycemic control reduced the risk for progression of diabetic retinopathy in people with T2D of 10 years' duration. This study included 2856 ACCORD participants enrolled in the ACCORD Eye Study and followed for 4 years.

The ADA recommends screening by an ophthalmologist for diabetic retinopathy within 5 years of the diagnosis of T1D and at the time of diagnosis of T2D. Women with preexisting diabetes who are planning pregnancy or who have become pregnant should be screened before pregnancy or in the first trimester.

While optimization of blood glucose, blood pressure, and serum lipid levels in conjunction with appropriately scheduled dilated eye examinations can substantially decrease the risk for vision loss from diabetic retinopathy, a significant proportion of those affected with diabetes develop diabetic macular edema or proliferative changes that require intervention. ADA treatment recommendations are:

•    Refer patients with any level of macular edema, severe nonproliferative diabetic retinopathy (a precursor of proliferative diabetic retinopathy), or proliferative diabetic retinopathy to an ophthalmologist knowledgeable and experienced in the management and treatment of diabetic retinopathy.
•    Laser photocoagulation therapy reduces the risk for vision loss in patients with high-risk proliferative diabetic retinopathy and, in some cases, severe nonproliferative diabetic retinopathy.
•    Intravitreous injections of anti–vascular endothelial growth factor are indicated for central-involved diabetic macular edema, which occurs beneath the foveal center and may threaten reading vision.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The American Diabetes Association (ADA) position statement on diabetic retinopathy states that hyperglycemia has been the most consistently associated risk factor for retinopathy. A large and consistent set of observational studies and clinical trials confirms the association of poor glucose control and retinopathy. 

The Diabetes Control and Complications Trial (DCCT), a randomized controlled clinical trial of intensive glycemic control vs conventional glycemic control in people with type 1 diabetes (T1D), demonstrated that intensive therapy reduced the development or progression of diabetic retinopathy by 34%-76%. The DCCT also demonstrated a definitive relationship between hyperglycemia and diabetic microvascular complications, including retinopathy. Early treatment with intensive therapy was effective.

The UK Prospective Diabetes Study (UKPDS) of patients with newly diagnosed T2D conclusively demonstrated that improved blood glucose control reduced the risk for retinopathy and nephropathy and, possibly, neuropathy. The overall microvascular complication rate was decreased by 25% in patients receiving intensive therapy vs conventional therapy. Epidemiologic analysis of the UKPDS data showed a continuous relationship between the risk for microvascular complications and glycemia, such that every percentage-point decrease in A1c (eg, 9% to 8%) was associated with a 35% reduction in the risk for microvascular complications.

More recently, the ACCORD trial of medical therapies demonstrated that intensive glycemic control reduced the risk for progression of diabetic retinopathy in people with T2D of 10 years' duration. This study included 2856 ACCORD participants enrolled in the ACCORD Eye Study and followed for 4 years.

The ADA recommends screening by an ophthalmologist for diabetic retinopathy within 5 years of the diagnosis of T1D and at the time of diagnosis of T2D. Women with preexisting diabetes who are planning pregnancy or who have become pregnant should be screened before pregnancy or in the first trimester.

While optimization of blood glucose, blood pressure, and serum lipid levels in conjunction with appropriately scheduled dilated eye examinations can substantially decrease the risk for vision loss from diabetic retinopathy, a significant proportion of those affected with diabetes develop diabetic macular edema or proliferative changes that require intervention. ADA treatment recommendations are:

•    Refer patients with any level of macular edema, severe nonproliferative diabetic retinopathy (a precursor of proliferative diabetic retinopathy), or proliferative diabetic retinopathy to an ophthalmologist knowledgeable and experienced in the management and treatment of diabetic retinopathy.
•    Laser photocoagulation therapy reduces the risk for vision loss in patients with high-risk proliferative diabetic retinopathy and, in some cases, severe nonproliferative diabetic retinopathy.
•    Intravitreous injections of anti–vascular endothelial growth factor are indicated for central-involved diabetic macular edema, which occurs beneath the foveal center and may threaten reading vision.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The 2020 Kidney Disease Improving Global Outcomes (KDIGO) diabetes management in CKD guideline states that most patients with diabetic nephropathy and an eGFR  ≥ 30 mL/min/1.73 m² benefit from treatment with both metformin and a sodium-glucose cotransporter 2 (SGLT2) inhibitor, which have been demonstrated to offer substantial benefits in reducing the risks for diabetic nephropathy and cardiovascular disease.

In patients who do not reach individualized targets with metformin and an SGLT2 inhibitor, or who are unable to use these medications, a long-acting glucagon-like peptide 1 (GLP-1) receptor antagonist may be used.

Metformin should be administered with caution to patients with CKD because it may increase the risk for lactic acidosis. It is contraindicated in patients with an eGFR < 30, but this patient's eGFR is adequate. Many clinicians might use a lower metformin dosage (1500 mg) as a precaution. Given how high his A1c is, adding a GLP-1 receptor antagonist is probably going to be needed because an SGLT2 inhibitor is only intermediate in terms of glucose reduction. 

For control of his hypertension, the American Diabetes Association recommends either an angiotensin-converting enzyme (ACE) inhibitor or an angiotensin receptor blocker (ARB) as first-line treatment. However, one agent alone is unlikely to control this patient's hypertension. At his level of eGFR, a thiazide diuretic is unlikely to be very effective. Therefore, a loop diuretic should be initiated with the ACE inhibitor or ARB, especially because he has edema.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The 2020 Kidney Disease Improving Global Outcomes (KDIGO) diabetes management in CKD guideline states that most patients with diabetic nephropathy and an eGFR  ≥ 30 mL/min/1.73 m² benefit from treatment with both metformin and a sodium-glucose cotransporter 2 (SGLT2) inhibitor, which have been demonstrated to offer substantial benefits in reducing the risks for diabetic nephropathy and cardiovascular disease.

In patients who do not reach individualized targets with metformin and an SGLT2 inhibitor, or who are unable to use these medications, a long-acting glucagon-like peptide 1 (GLP-1) receptor antagonist may be used.

Metformin should be administered with caution to patients with CKD because it may increase the risk for lactic acidosis. It is contraindicated in patients with an eGFR < 30, but this patient's eGFR is adequate. Many clinicians might use a lower metformin dosage (1500 mg) as a precaution. Given how high his A1c is, adding a GLP-1 receptor antagonist is probably going to be needed because an SGLT2 inhibitor is only intermediate in terms of glucose reduction. 

For control of his hypertension, the American Diabetes Association recommends either an angiotensin-converting enzyme (ACE) inhibitor or an angiotensin receptor blocker (ARB) as first-line treatment. However, one agent alone is unlikely to control this patient's hypertension. At his level of eGFR, a thiazide diuretic is unlikely to be very effective. Therefore, a loop diuretic should be initiated with the ACE inhibitor or ARB, especially because he has edema.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

The 2020 Kidney Disease Improving Global Outcomes (KDIGO) diabetes management in CKD guideline states that most patients with diabetic nephropathy and an eGFR  ≥ 30 mL/min/1.73 m² benefit from treatment with both metformin and a sodium-glucose cotransporter 2 (SGLT2) inhibitor, which have been demonstrated to offer substantial benefits in reducing the risks for diabetic nephropathy and cardiovascular disease.

In patients who do not reach individualized targets with metformin and an SGLT2 inhibitor, or who are unable to use these medications, a long-acting glucagon-like peptide 1 (GLP-1) receptor antagonist may be used.

Metformin should be administered with caution to patients with CKD because it may increase the risk for lactic acidosis. It is contraindicated in patients with an eGFR < 30, but this patient's eGFR is adequate. Many clinicians might use a lower metformin dosage (1500 mg) as a precaution. Given how high his A1c is, adding a GLP-1 receptor antagonist is probably going to be needed because an SGLT2 inhibitor is only intermediate in terms of glucose reduction. 

For control of his hypertension, the American Diabetes Association recommends either an angiotensin-converting enzyme (ACE) inhibitor or an angiotensin receptor blocker (ARB) as first-line treatment. However, one agent alone is unlikely to control this patient's hypertension. At his level of eGFR, a thiazide diuretic is unlikely to be very effective. Therefore, a loop diuretic should be initiated with the ACE inhibitor or ARB, especially because he has edema.

Romesh K. Khardori, MD, PhD, Professor, Department of Internal Medicine, Division of Diabetes, Endocrine, and Metabolic Disorders, Eastern Virginia Medical School; EVMS Medical Group, Norfolk, Virginia

Romesh K. Khardori, MD, PhD, has disclosed no relevant financial relationships.
 

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.