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Interventional Chest/Diagnostic Procedures
Review of The AMPLE Trial: is talc making a comeback?
A proposed advantage of indwelling pleural catheters (IPC) is their purported ability to reduce hospitalization time when compared with the more traditional talc pleurodesis procedure. The recently published AMPLE trial was a multicenter randomized trial comparing the impact of IPCs vs talc pleurodesis on hospitalization days in patients with malignant pleural effusions. One-hundred forty-six patients were randomized for pleurodesis to either IPC vs pleurodesis via talc slurry in nine centers in Australia, New Zealand, Singapore, and Hong Kong. Patients were followed for up to 12 months. Secondary outcomes included need for further pleural intervention, breathlessness, quality of life, and adverse events.
Patients randomized to IPC spent on average 2 days less in the hospital (10 vs 12 days), a difference that was statistically significant, though of questionable clinical relevance, and somewhat disappointing in light of a prior prospective study from the same group suggesting a benefit of 6 to 7 days (Fysh. Chest. 2012;142[2]:394. As in previous studies, additional pleural procedures were more common in the talc group, adverse events occurred more frequently with IPC, but breathlessness and quality of life were identical in both groups.
This study raises interesting questions. Clearly, IPCs have been favored over talc pleurodesis in the US in the last decade, primarily because of a perceived benefit in terms of hospitalization time. In the absence of clear advantage of IPC on time spent in the hospital, impact on breathlessness and quality of life, and considering the inconvenience of frequent drainage, co-pay incurred by patients, and increased adverse events with IPC, the pendulum may swing again toward talc pleurodesis.
Christine Argento, MD, FCCP
Fabien Maldonado, MD, FCCP
Steering Committee Members
Pediatric Chest Medicine
Early escalation of inhaled corticosteroids: does it help prevent asthma exacerbations?
Asthma is one of the most common chronic conditions in children. The importance of effective control of asthma to prevent exacerbations is well accepted. Inhaled corticosteroids (ICS) are a preferred component of treatment to improve asthma control in children with persistent asthma; however, exacerbations can still occur and result in significant morbidity. Most patients receive systemic corticosteroids during acute asthma exacerbations. The most recent Global Initiative for Asthma (GINA) guidelines recommend increasing ICS at the first signs of an asthma exacerbation in an effort to lessen the need for systemic corticosteroids (GINA. Global strategy for asthma management and prevention. 2017. http://www.ginasthma.org/).
In a recent issue of the New England Journal of Medicine, Jackson and colleagues at the National Heart, Lung, and Blood Institute AsthmaNet published the results of a randomized, double-blind 48-week trial, which included 254 children between ages 5 and 11 years with mild-moderate asthma. Their objectives were to compare exacerbation rates, time to first exacerbation, acute care visits, and bronchodilator use in children randomized to treatment with either high (5 x baseline ICS dose x 7 days) or low dose inhaled corticosteroids early in a drop to the “yellow zone” (Jackson, et al. N Engl J Med. 2018;378[10]:891).
Time to asthma exacerbations and exacerbations that required treatment with corticosteroids did not significantly differ between the low dose and high dose groups. Unexpectedly, the rate of exacerbations was higher with the high dose compared with the low dose group (0.48 vs 0.37). The children who were in the high dose group received 16% more ICS compared with the low dose group. Although not significant, there was a lower linear growth rate, ~0.23 cm per year seen in this high-dose group than in the low-dose group. Additionally, the use of bronchodilator, symptoms, and the rates of evaluation by a physician (ie, emergency department or urgent care visits) did not significantly differ between the two groups.
This study was specific to school-age children with mild-moderate persistent asthma treated with low dose ICS with a history of good adherence. Overall, this well-designed study helps address a question that many clinicians have regarding escalating ICS in the “yellow zone.” Escalating ICS did not reduce exacerbations at the cost of a lower linear growth rate. When it comes to escalating ICS for asthma exacerbation, more is not better.
In conclusion, in children with mild-to-moderate persistent asthma treated with daily inhaled glucocorticoids, quintupling the dose at the early signs of loss of asthma control did not reduce the rate of severe asthma exacerbations or improve other asthma outcomes and may be associated with diminished linear growth. (Funded by the National Heart, Lung, and Blood Institute; STICS ClinicalTrials.gov number, NCT02066129).
John Bishara, DO
Fellow-in-Training Member
Pulmonary Physiology, Function, and Rehabilitation
Understanding cardiopulmonary exercise testing
The cardiopulmonary exercise test (CPET) is an underutilized tool for evaluating patients with dyspnea of uncertain etiology. This is often due to the daunting task of trying to make sense of seemingly large amounts of interacting data, along with clinicians not having been taught a systematic approach for interpreting the results. Unlike other typical tests we order that point to a specific laboratory or anatomic radiographic abnormality, narrowing our differential to a few possibilities, one needs a different mindset when interpreting a CPET. This is a study to demonstrate the body’s normal or abnormal physiologic responses to increasing levels of physical stress. Because different conditions can give similar findings, the physiologic abnormalities must be interpreted in the context of the clinical presentation. If the results do not entirely fit the suspected diagnosis, they should be reported in a manner that may help guide the ordering physician down an alternate pathway. This CHEST NetWork has sought ways to reach out to members to promote a better understanding of the utilization of the basics of pulmonary physiology in the management of patients. We created an online two-part video demonstrating a basic systematic approach toward understanding the combinations of findings one often sees when performing a CPET. A comprehensive understanding cannot be shown in a 40-minute video series, but, hopefully, this will give a starting point to make this task easier and more enjoyable.
Zachary Morris, MD, FCCP
Steering Committee Member
Pulmonary Vascular Disease
BMPR2 mutation regulates singular millimetric fibrovascular lesions in bronchial circulation in PAH
Patients with PAH with BMPR2 mutation are younger with worse hemodynamics, ie, higher mean PAP with higher PVR and a lower cardiac index in comparison to the noncarriers. A systematic analysis of pulmonary imaging using CT angiography or magnetic resonance imaging in patients with PAH demonstrated increased bronchial arterial hypertrophy in BMPR2 mutation carriers compared with those without the mutation. Moreover, hemoptysis is more frequently encountered in patients with PAH with BMPR2 mutation and presumably related to bronchial artery remodeling and angiogenesis. French investigators described, in histopathology findings of explanted lungs of 44 patients with PAH (23 carriers of BMPR2 and 21 noncarriers), unusual singular millimetric fibrovascular lesions (SiMFi) in patients with BMPR2 mutations. The SiMFi is a structure of millimetric dimension with fibrovascular characteristics that are extremely rich in collagen and displayed more than one vascular channel. SiMFi did not show a classic glomeruloid pattern with predominant endothelial cell proliferation as seen in plexiform lesions but rather a large conglomerate of hypertrophic vessels. Performing an ink injection experiment in a freshly explanted lung highlighted a patent connection between bronchial/systemic vessels and pulmonary septal veins. SiMFis had an increased amount of bronchial microvessels and showed increased hypertrophy of larger bronchial arteries. SiMFi is directly related to hypertrophy and/or angiogenesis of vasa vasorum/bronchial arteries in the vicinity of the diseased artery. In patients with PAH with BMPR2 mutations, bronchial angiogenesis is more prevalent compared with patients with PAH lacking these mutations. This highlights the role of bronchial arteries in the spectrum of PAH.
Hector Cajigas, MD, FCCP
Sandeep Sahay, MD, FCCP
Steering Committee Members
References
1.Ghigna MR, et al. BMPR2 mutation status influences bronchial vascular changes in pulmonary arterial hypertension. Eur Respir J. 2016;48[6]:1668. Epub 2016 Nov 3.
2. Tio D, et al. Risk factors for hemoptysis in idiopathic and hereditary pulmonary arterial hypertension. PLoS One. 2013;8:e78132.
3. Elliott CG, et al. Relationship of BMPR2 mutations to vasoreactivity in pulmonary arterial hypertension. Circulation. 2006;113[21]:2509.
Thoracic Oncology
We have a lung cancer screening test but we could use it better
The American Lung Association recently demonstrated the majority of current and former smokers don’t know about lung cancer screening (LCS) with low-dose CT scanning.1 Researchers estimate less than 5% of eligible persons received LCS.2 Awareness campaigns targeting patients and health care providers at the local level can improve LCS uptake.3,4 While any new clinical practice has an expected implementation delay, LCS has another implementation barrier: complex eligibility criteria (age 55 – 80 years PLUS 30+ pack-year smoking history PLUS quit time less than 15 years). Electronic health record (EHR) tools might accelerate the adoption curve to identify eligible persons.5 Moreover, assessing and recording a qualitative smoking history is challenging, at best. One center showed 96.2% discordance between EHR smoking history and that obtained during shared decision-making visit for LCS.6 Mostly, the EHR underreported quantitative pack-year history; meaning LCS-eligible patients might fail to be identified by EHR review alone. Another small pilot showed that some patients age 55 – 79 years will update their EHR smoking history using patient portal, but this will not be effective for all patients.7 For current smokers, age alone may be an effective identification strategy, given the average start time for most smokers.8
Even though current LCS guidelines leave out some individuals at high risk for lung cancer, we must continue efforts to offer this potentially life-saving service to patients now eligible. Using EHR tools may help proactively identify those who are eligible for lung cancer screening.
A bbie Begnaud, MD
NetWork Member
References
1. New Study from American Lung Association’s LUNG FORCE Reveals Low Awareness of Lifesaving Lung Cancer Screening Among Those at Greatest Risk. (2017). http://www.lung.org/about-us/media/press-releases/new-study-lung-cancer-screening.html. Accessed April 19, 2018.
2. Soneji S, et al. Underuse of Chest Radiography Versus Computed Tomography for Lung Cancer Screening. Am J Public Health. 2017;107(8):1248.
3. Cardarelli R, et al. Terminate lung cancer (TLC) study-A mixed-methods population approach to increase lung cancer screening awareness and low-dose computed tomography in Eastern Kentucky. Cancer Epidemiol. 2017;46:1.
4. Jessup, DL, et al. Implementation of digital awareness strategies to engage patients and providers in a lung cancer screening program: retrospective study. J Med Internet Res. 2018;20(2):e52.
5. Comparison of the Electronic Medical Record versus a Shared Decision Making Conversation. Ann Am Thorac Soc. 2018. In press.
6. Modin HE, et al. Pack-year cigarette smoking history for determination of lung cancer screening eligibility. Ann Am Thorac Soc. 2017 Aug;14(8):1320-1325.
7. Begnaud AL, et al. Randomized electronic promotion of lung cancer screening: a pilot. JCO Clinical Cancer Informatics(1), 1-6. doi:10.1200/cci.17.00033
8. The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General. (2014). Atlanta, GA.
Interventional Chest/Diagnostic Procedures
Review of The AMPLE Trial: is talc making a comeback?
A proposed advantage of indwelling pleural catheters (IPC) is their purported ability to reduce hospitalization time when compared with the more traditional talc pleurodesis procedure. The recently published AMPLE trial was a multicenter randomized trial comparing the impact of IPCs vs talc pleurodesis on hospitalization days in patients with malignant pleural effusions. One-hundred forty-six patients were randomized for pleurodesis to either IPC vs pleurodesis via talc slurry in nine centers in Australia, New Zealand, Singapore, and Hong Kong. Patients were followed for up to 12 months. Secondary outcomes included need for further pleural intervention, breathlessness, quality of life, and adverse events.
Patients randomized to IPC spent on average 2 days less in the hospital (10 vs 12 days), a difference that was statistically significant, though of questionable clinical relevance, and somewhat disappointing in light of a prior prospective study from the same group suggesting a benefit of 6 to 7 days (Fysh. Chest. 2012;142[2]:394. As in previous studies, additional pleural procedures were more common in the talc group, adverse events occurred more frequently with IPC, but breathlessness and quality of life were identical in both groups.
This study raises interesting questions. Clearly, IPCs have been favored over talc pleurodesis in the US in the last decade, primarily because of a perceived benefit in terms of hospitalization time. In the absence of clear advantage of IPC on time spent in the hospital, impact on breathlessness and quality of life, and considering the inconvenience of frequent drainage, co-pay incurred by patients, and increased adverse events with IPC, the pendulum may swing again toward talc pleurodesis.
Christine Argento, MD, FCCP
Fabien Maldonado, MD, FCCP
Steering Committee Members
Pediatric Chest Medicine
Early escalation of inhaled corticosteroids: does it help prevent asthma exacerbations?
Asthma is one of the most common chronic conditions in children. The importance of effective control of asthma to prevent exacerbations is well accepted. Inhaled corticosteroids (ICS) are a preferred component of treatment to improve asthma control in children with persistent asthma; however, exacerbations can still occur and result in significant morbidity. Most patients receive systemic corticosteroids during acute asthma exacerbations. The most recent Global Initiative for Asthma (GINA) guidelines recommend increasing ICS at the first signs of an asthma exacerbation in an effort to lessen the need for systemic corticosteroids (GINA. Global strategy for asthma management and prevention. 2017. http://www.ginasthma.org/).
In a recent issue of the New England Journal of Medicine, Jackson and colleagues at the National Heart, Lung, and Blood Institute AsthmaNet published the results of a randomized, double-blind 48-week trial, which included 254 children between ages 5 and 11 years with mild-moderate asthma. Their objectives were to compare exacerbation rates, time to first exacerbation, acute care visits, and bronchodilator use in children randomized to treatment with either high (5 x baseline ICS dose x 7 days) or low dose inhaled corticosteroids early in a drop to the “yellow zone” (Jackson, et al. N Engl J Med. 2018;378[10]:891).
Time to asthma exacerbations and exacerbations that required treatment with corticosteroids did not significantly differ between the low dose and high dose groups. Unexpectedly, the rate of exacerbations was higher with the high dose compared with the low dose group (0.48 vs 0.37). The children who were in the high dose group received 16% more ICS compared with the low dose group. Although not significant, there was a lower linear growth rate, ~0.23 cm per year seen in this high-dose group than in the low-dose group. Additionally, the use of bronchodilator, symptoms, and the rates of evaluation by a physician (ie, emergency department or urgent care visits) did not significantly differ between the two groups.
This study was specific to school-age children with mild-moderate persistent asthma treated with low dose ICS with a history of good adherence. Overall, this well-designed study helps address a question that many clinicians have regarding escalating ICS in the “yellow zone.” Escalating ICS did not reduce exacerbations at the cost of a lower linear growth rate. When it comes to escalating ICS for asthma exacerbation, more is not better.
In conclusion, in children with mild-to-moderate persistent asthma treated with daily inhaled glucocorticoids, quintupling the dose at the early signs of loss of asthma control did not reduce the rate of severe asthma exacerbations or improve other asthma outcomes and may be associated with diminished linear growth. (Funded by the National Heart, Lung, and Blood Institute; STICS ClinicalTrials.gov number, NCT02066129).
John Bishara, DO
Fellow-in-Training Member
Pulmonary Physiology, Function, and Rehabilitation
Understanding cardiopulmonary exercise testing
The cardiopulmonary exercise test (CPET) is an underutilized tool for evaluating patients with dyspnea of uncertain etiology. This is often due to the daunting task of trying to make sense of seemingly large amounts of interacting data, along with clinicians not having been taught a systematic approach for interpreting the results. Unlike other typical tests we order that point to a specific laboratory or anatomic radiographic abnormality, narrowing our differential to a few possibilities, one needs a different mindset when interpreting a CPET. This is a study to demonstrate the body’s normal or abnormal physiologic responses to increasing levels of physical stress. Because different conditions can give similar findings, the physiologic abnormalities must be interpreted in the context of the clinical presentation. If the results do not entirely fit the suspected diagnosis, they should be reported in a manner that may help guide the ordering physician down an alternate pathway. This CHEST NetWork has sought ways to reach out to members to promote a better understanding of the utilization of the basics of pulmonary physiology in the management of patients. We created an online two-part video demonstrating a basic systematic approach toward understanding the combinations of findings one often sees when performing a CPET. A comprehensive understanding cannot be shown in a 40-minute video series, but, hopefully, this will give a starting point to make this task easier and more enjoyable.
Zachary Morris, MD, FCCP
Steering Committee Member
Pulmonary Vascular Disease
BMPR2 mutation regulates singular millimetric fibrovascular lesions in bronchial circulation in PAH
Patients with PAH with BMPR2 mutation are younger with worse hemodynamics, ie, higher mean PAP with higher PVR and a lower cardiac index in comparison to the noncarriers. A systematic analysis of pulmonary imaging using CT angiography or magnetic resonance imaging in patients with PAH demonstrated increased bronchial arterial hypertrophy in BMPR2 mutation carriers compared with those without the mutation. Moreover, hemoptysis is more frequently encountered in patients with PAH with BMPR2 mutation and presumably related to bronchial artery remodeling and angiogenesis. French investigators described, in histopathology findings of explanted lungs of 44 patients with PAH (23 carriers of BMPR2 and 21 noncarriers), unusual singular millimetric fibrovascular lesions (SiMFi) in patients with BMPR2 mutations. The SiMFi is a structure of millimetric dimension with fibrovascular characteristics that are extremely rich in collagen and displayed more than one vascular channel. SiMFi did not show a classic glomeruloid pattern with predominant endothelial cell proliferation as seen in plexiform lesions but rather a large conglomerate of hypertrophic vessels. Performing an ink injection experiment in a freshly explanted lung highlighted a patent connection between bronchial/systemic vessels and pulmonary septal veins. SiMFis had an increased amount of bronchial microvessels and showed increased hypertrophy of larger bronchial arteries. SiMFi is directly related to hypertrophy and/or angiogenesis of vasa vasorum/bronchial arteries in the vicinity of the diseased artery. In patients with PAH with BMPR2 mutations, bronchial angiogenesis is more prevalent compared with patients with PAH lacking these mutations. This highlights the role of bronchial arteries in the spectrum of PAH.
Hector Cajigas, MD, FCCP
Sandeep Sahay, MD, FCCP
Steering Committee Members
References
1.Ghigna MR, et al. BMPR2 mutation status influences bronchial vascular changes in pulmonary arterial hypertension. Eur Respir J. 2016;48[6]:1668. Epub 2016 Nov 3.
2. Tio D, et al. Risk factors for hemoptysis in idiopathic and hereditary pulmonary arterial hypertension. PLoS One. 2013;8:e78132.
3. Elliott CG, et al. Relationship of BMPR2 mutations to vasoreactivity in pulmonary arterial hypertension. Circulation. 2006;113[21]:2509.
Thoracic Oncology
We have a lung cancer screening test but we could use it better
The American Lung Association recently demonstrated the majority of current and former smokers don’t know about lung cancer screening (LCS) with low-dose CT scanning.1 Researchers estimate less than 5% of eligible persons received LCS.2 Awareness campaigns targeting patients and health care providers at the local level can improve LCS uptake.3,4 While any new clinical practice has an expected implementation delay, LCS has another implementation barrier: complex eligibility criteria (age 55 – 80 years PLUS 30+ pack-year smoking history PLUS quit time less than 15 years). Electronic health record (EHR) tools might accelerate the adoption curve to identify eligible persons.5 Moreover, assessing and recording a qualitative smoking history is challenging, at best. One center showed 96.2% discordance between EHR smoking history and that obtained during shared decision-making visit for LCS.6 Mostly, the EHR underreported quantitative pack-year history; meaning LCS-eligible patients might fail to be identified by EHR review alone. Another small pilot showed that some patients age 55 – 79 years will update their EHR smoking history using patient portal, but this will not be effective for all patients.7 For current smokers, age alone may be an effective identification strategy, given the average start time for most smokers.8
Even though current LCS guidelines leave out some individuals at high risk for lung cancer, we must continue efforts to offer this potentially life-saving service to patients now eligible. Using EHR tools may help proactively identify those who are eligible for lung cancer screening.
A bbie Begnaud, MD
NetWork Member
References
1. New Study from American Lung Association’s LUNG FORCE Reveals Low Awareness of Lifesaving Lung Cancer Screening Among Those at Greatest Risk. (2017). http://www.lung.org/about-us/media/press-releases/new-study-lung-cancer-screening.html. Accessed April 19, 2018.
2. Soneji S, et al. Underuse of Chest Radiography Versus Computed Tomography for Lung Cancer Screening. Am J Public Health. 2017;107(8):1248.
3. Cardarelli R, et al. Terminate lung cancer (TLC) study-A mixed-methods population approach to increase lung cancer screening awareness and low-dose computed tomography in Eastern Kentucky. Cancer Epidemiol. 2017;46:1.
4. Jessup, DL, et al. Implementation of digital awareness strategies to engage patients and providers in a lung cancer screening program: retrospective study. J Med Internet Res. 2018;20(2):e52.
5. Comparison of the Electronic Medical Record versus a Shared Decision Making Conversation. Ann Am Thorac Soc. 2018. In press.
6. Modin HE, et al. Pack-year cigarette smoking history for determination of lung cancer screening eligibility. Ann Am Thorac Soc. 2017 Aug;14(8):1320-1325.
7. Begnaud AL, et al. Randomized electronic promotion of lung cancer screening: a pilot. JCO Clinical Cancer Informatics(1), 1-6. doi:10.1200/cci.17.00033
8. The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General. (2014). Atlanta, GA.
Interventional Chest/Diagnostic Procedures
Review of The AMPLE Trial: is talc making a comeback?
A proposed advantage of indwelling pleural catheters (IPC) is their purported ability to reduce hospitalization time when compared with the more traditional talc pleurodesis procedure. The recently published AMPLE trial was a multicenter randomized trial comparing the impact of IPCs vs talc pleurodesis on hospitalization days in patients with malignant pleural effusions. One-hundred forty-six patients were randomized for pleurodesis to either IPC vs pleurodesis via talc slurry in nine centers in Australia, New Zealand, Singapore, and Hong Kong. Patients were followed for up to 12 months. Secondary outcomes included need for further pleural intervention, breathlessness, quality of life, and adverse events.
Patients randomized to IPC spent on average 2 days less in the hospital (10 vs 12 days), a difference that was statistically significant, though of questionable clinical relevance, and somewhat disappointing in light of a prior prospective study from the same group suggesting a benefit of 6 to 7 days (Fysh. Chest. 2012;142[2]:394. As in previous studies, additional pleural procedures were more common in the talc group, adverse events occurred more frequently with IPC, but breathlessness and quality of life were identical in both groups.
This study raises interesting questions. Clearly, IPCs have been favored over talc pleurodesis in the US in the last decade, primarily because of a perceived benefit in terms of hospitalization time. In the absence of clear advantage of IPC on time spent in the hospital, impact on breathlessness and quality of life, and considering the inconvenience of frequent drainage, co-pay incurred by patients, and increased adverse events with IPC, the pendulum may swing again toward talc pleurodesis.
Christine Argento, MD, FCCP
Fabien Maldonado, MD, FCCP
Steering Committee Members
Pediatric Chest Medicine
Early escalation of inhaled corticosteroids: does it help prevent asthma exacerbations?
Asthma is one of the most common chronic conditions in children. The importance of effective control of asthma to prevent exacerbations is well accepted. Inhaled corticosteroids (ICS) are a preferred component of treatment to improve asthma control in children with persistent asthma; however, exacerbations can still occur and result in significant morbidity. Most patients receive systemic corticosteroids during acute asthma exacerbations. The most recent Global Initiative for Asthma (GINA) guidelines recommend increasing ICS at the first signs of an asthma exacerbation in an effort to lessen the need for systemic corticosteroids (GINA. Global strategy for asthma management and prevention. 2017. http://www.ginasthma.org/).
In a recent issue of the New England Journal of Medicine, Jackson and colleagues at the National Heart, Lung, and Blood Institute AsthmaNet published the results of a randomized, double-blind 48-week trial, which included 254 children between ages 5 and 11 years with mild-moderate asthma. Their objectives were to compare exacerbation rates, time to first exacerbation, acute care visits, and bronchodilator use in children randomized to treatment with either high (5 x baseline ICS dose x 7 days) or low dose inhaled corticosteroids early in a drop to the “yellow zone” (Jackson, et al. N Engl J Med. 2018;378[10]:891).
Time to asthma exacerbations and exacerbations that required treatment with corticosteroids did not significantly differ between the low dose and high dose groups. Unexpectedly, the rate of exacerbations was higher with the high dose compared with the low dose group (0.48 vs 0.37). The children who were in the high dose group received 16% more ICS compared with the low dose group. Although not significant, there was a lower linear growth rate, ~0.23 cm per year seen in this high-dose group than in the low-dose group. Additionally, the use of bronchodilator, symptoms, and the rates of evaluation by a physician (ie, emergency department or urgent care visits) did not significantly differ between the two groups.
This study was specific to school-age children with mild-moderate persistent asthma treated with low dose ICS with a history of good adherence. Overall, this well-designed study helps address a question that many clinicians have regarding escalating ICS in the “yellow zone.” Escalating ICS did not reduce exacerbations at the cost of a lower linear growth rate. When it comes to escalating ICS for asthma exacerbation, more is not better.
In conclusion, in children with mild-to-moderate persistent asthma treated with daily inhaled glucocorticoids, quintupling the dose at the early signs of loss of asthma control did not reduce the rate of severe asthma exacerbations or improve other asthma outcomes and may be associated with diminished linear growth. (Funded by the National Heart, Lung, and Blood Institute; STICS ClinicalTrials.gov number, NCT02066129).
John Bishara, DO
Fellow-in-Training Member
Pulmonary Physiology, Function, and Rehabilitation
Understanding cardiopulmonary exercise testing
The cardiopulmonary exercise test (CPET) is an underutilized tool for evaluating patients with dyspnea of uncertain etiology. This is often due to the daunting task of trying to make sense of seemingly large amounts of interacting data, along with clinicians not having been taught a systematic approach for interpreting the results. Unlike other typical tests we order that point to a specific laboratory or anatomic radiographic abnormality, narrowing our differential to a few possibilities, one needs a different mindset when interpreting a CPET. This is a study to demonstrate the body’s normal or abnormal physiologic responses to increasing levels of physical stress. Because different conditions can give similar findings, the physiologic abnormalities must be interpreted in the context of the clinical presentation. If the results do not entirely fit the suspected diagnosis, they should be reported in a manner that may help guide the ordering physician down an alternate pathway. This CHEST NetWork has sought ways to reach out to members to promote a better understanding of the utilization of the basics of pulmonary physiology in the management of patients. We created an online two-part video demonstrating a basic systematic approach toward understanding the combinations of findings one often sees when performing a CPET. A comprehensive understanding cannot be shown in a 40-minute video series, but, hopefully, this will give a starting point to make this task easier and more enjoyable.
Zachary Morris, MD, FCCP
Steering Committee Member
Pulmonary Vascular Disease
BMPR2 mutation regulates singular millimetric fibrovascular lesions in bronchial circulation in PAH
Patients with PAH with BMPR2 mutation are younger with worse hemodynamics, ie, higher mean PAP with higher PVR and a lower cardiac index in comparison to the noncarriers. A systematic analysis of pulmonary imaging using CT angiography or magnetic resonance imaging in patients with PAH demonstrated increased bronchial arterial hypertrophy in BMPR2 mutation carriers compared with those without the mutation. Moreover, hemoptysis is more frequently encountered in patients with PAH with BMPR2 mutation and presumably related to bronchial artery remodeling and angiogenesis. French investigators described, in histopathology findings of explanted lungs of 44 patients with PAH (23 carriers of BMPR2 and 21 noncarriers), unusual singular millimetric fibrovascular lesions (SiMFi) in patients with BMPR2 mutations. The SiMFi is a structure of millimetric dimension with fibrovascular characteristics that are extremely rich in collagen and displayed more than one vascular channel. SiMFi did not show a classic glomeruloid pattern with predominant endothelial cell proliferation as seen in plexiform lesions but rather a large conglomerate of hypertrophic vessels. Performing an ink injection experiment in a freshly explanted lung highlighted a patent connection between bronchial/systemic vessels and pulmonary septal veins. SiMFis had an increased amount of bronchial microvessels and showed increased hypertrophy of larger bronchial arteries. SiMFi is directly related to hypertrophy and/or angiogenesis of vasa vasorum/bronchial arteries in the vicinity of the diseased artery. In patients with PAH with BMPR2 mutations, bronchial angiogenesis is more prevalent compared with patients with PAH lacking these mutations. This highlights the role of bronchial arteries in the spectrum of PAH.
Hector Cajigas, MD, FCCP
Sandeep Sahay, MD, FCCP
Steering Committee Members
References
1.Ghigna MR, et al. BMPR2 mutation status influences bronchial vascular changes in pulmonary arterial hypertension. Eur Respir J. 2016;48[6]:1668. Epub 2016 Nov 3.
2. Tio D, et al. Risk factors for hemoptysis in idiopathic and hereditary pulmonary arterial hypertension. PLoS One. 2013;8:e78132.
3. Elliott CG, et al. Relationship of BMPR2 mutations to vasoreactivity in pulmonary arterial hypertension. Circulation. 2006;113[21]:2509.
Thoracic Oncology
We have a lung cancer screening test but we could use it better
The American Lung Association recently demonstrated the majority of current and former smokers don’t know about lung cancer screening (LCS) with low-dose CT scanning.1 Researchers estimate less than 5% of eligible persons received LCS.2 Awareness campaigns targeting patients and health care providers at the local level can improve LCS uptake.3,4 While any new clinical practice has an expected implementation delay, LCS has another implementation barrier: complex eligibility criteria (age 55 – 80 years PLUS 30+ pack-year smoking history PLUS quit time less than 15 years). Electronic health record (EHR) tools might accelerate the adoption curve to identify eligible persons.5 Moreover, assessing and recording a qualitative smoking history is challenging, at best. One center showed 96.2% discordance between EHR smoking history and that obtained during shared decision-making visit for LCS.6 Mostly, the EHR underreported quantitative pack-year history; meaning LCS-eligible patients might fail to be identified by EHR review alone. Another small pilot showed that some patients age 55 – 79 years will update their EHR smoking history using patient portal, but this will not be effective for all patients.7 For current smokers, age alone may be an effective identification strategy, given the average start time for most smokers.8
Even though current LCS guidelines leave out some individuals at high risk for lung cancer, we must continue efforts to offer this potentially life-saving service to patients now eligible. Using EHR tools may help proactively identify those who are eligible for lung cancer screening.
A bbie Begnaud, MD
NetWork Member
References
1. New Study from American Lung Association’s LUNG FORCE Reveals Low Awareness of Lifesaving Lung Cancer Screening Among Those at Greatest Risk. (2017). http://www.lung.org/about-us/media/press-releases/new-study-lung-cancer-screening.html. Accessed April 19, 2018.
2. Soneji S, et al. Underuse of Chest Radiography Versus Computed Tomography for Lung Cancer Screening. Am J Public Health. 2017;107(8):1248.
3. Cardarelli R, et al. Terminate lung cancer (TLC) study-A mixed-methods population approach to increase lung cancer screening awareness and low-dose computed tomography in Eastern Kentucky. Cancer Epidemiol. 2017;46:1.
4. Jessup, DL, et al. Implementation of digital awareness strategies to engage patients and providers in a lung cancer screening program: retrospective study. J Med Internet Res. 2018;20(2):e52.
5. Comparison of the Electronic Medical Record versus a Shared Decision Making Conversation. Ann Am Thorac Soc. 2018. In press.
6. Modin HE, et al. Pack-year cigarette smoking history for determination of lung cancer screening eligibility. Ann Am Thorac Soc. 2017 Aug;14(8):1320-1325.
7. Begnaud AL, et al. Randomized electronic promotion of lung cancer screening: a pilot. JCO Clinical Cancer Informatics(1), 1-6. doi:10.1200/cci.17.00033
8. The Health Consequences of Smoking—50 Years of Progress: A Report of the Surgeon General. (2014). Atlanta, GA.