1
|
Palmer T, Obst SJ, Aitken CR, Walsh J, Sabapathy S, Adams L, Morris NR. Fixed-intensity exercise tests to measure exertional dyspnoea in chronic heart and lung populations: a systematic review. Eur Respir Rev 2023; 32:230016. [PMID: 37558262 PMCID: PMC10410401 DOI: 10.1183/16000617.0016-2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/31/2023] [Indexed: 08/11/2023] Open
Abstract
INTRODUCTION Exertional dyspnoea is the primary diagnostic symptom for chronic cardiopulmonary disease populations. Whilst a number of exercise tests are used, there remains no gold standard clinical measure of exertional dyspnoea. The aim of this review was to comprehensively describe and evaluate all types of fixed-intensity exercise tests used to assess exertional dyspnoea in chronic cardiopulmonary populations and, where possible, report the reliability and responsiveness of the tests. METHODS A systematic search of five electronic databases identified papers that examined 1) fixed-intensity exercise tests and measured exertional dyspnoea, 2) chronic cardiopulmonary populations, 3) exertional dyspnoea reported at isotime or upon completion of fixed-duration exercise tests, and 4) published in English. RESULTS Searches identified 8785 papers. 123 papers were included, covering exercise tests using a variety of fixed-intensity protocols. Three modes were identified, as follows: 1) cycling (n=87), 2) walking (n=31) and 3) other (step test (n=8) and arm exercise (n=2)). Most studies (98%) were performed on chronic respiratory disease patients. Nearly all studies (88%) used an incremental exercise test. 34% of studies used a fixed duration for the exercise test, with the remaining 66% using an exhaustion protocol recording exertional dyspnoea at isotime. Exertional dyspnoea was measured using the Borg scale (89%). 7% of studies reported reliability. Most studies (72%) examined the change in exertional dyspnoea in response to different interventions. CONCLUSION Considerable methodological variety of fixed-intensity exercise tests exists to assess exertional dyspnoea and most test protocols require incremental exercise tests. There does not appear to be a simple, universal test for measuring exertional dyspnoea in the clinical setting.
Collapse
Affiliation(s)
- Tanya Palmer
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Central Queensland University, School of Health, Medical and Applied Sciences, College of Health Sciences, Bundaberg, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Australia
- Allied Health Research Collaborative, The Prince Charles Hospital, Queensland Health, Chermside, Australia
| | - Steven J Obst
- Central Queensland University, School of Health, Medical and Applied Sciences, College of Health Sciences, Bundaberg, Australia
| | - Craig R Aitken
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Australia
- Allied Health Research Collaborative, The Prince Charles Hospital, Queensland Health, Chermside, Australia
- Heart and Lung Institute, The Prince Charles Hospital, Chermside, Australia
| | - James Walsh
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Allied Health Research Collaborative, The Prince Charles Hospital, Queensland Health, Chermside, Australia
- Heart and Lung Institute, The Prince Charles Hospital, Chermside, Australia
| | - Surendran Sabapathy
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Australia
| | - Lewis Adams
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Australia
| | - Norman R Morris
- Griffith University, School of Health Sciences and Social Work, Gold Coast, Australia
- Menzies Health Institute, Griffith University, Gold Coast, Australia
- Allied Health Research Collaborative, The Prince Charles Hospital, Queensland Health, Chermside, Australia
- Heart and Lung Institute, The Prince Charles Hospital, Chermside, Australia
| |
Collapse
|
2
|
Maltais F, O'Donnell D, Gáldiz Iturri JB, Kirsten AM, Singh D, Hamilton A, Tetzlaff K, Zhao Y, Casaburi R. Effect of 12 weeks of once-daily tiotropium/olodaterol on exercise endurance during constant work-rate cycling and endurance shuttle walking in chronic obstructive pulmonary disease. Ther Adv Respir Dis 2019; 12:1753465818755091. [PMID: 29439648 PMCID: PMC5937154 DOI: 10.1177/1753465818755091] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background: The TORRACTO® study evaluated the effects of tiotropium/olodaterol
versus placebo on endurance time during constant
work-rate cycling and constant speed shuttle walking in patients with
chronic obstructive pulmonary disease (COPD) after 12 weeks of
treatment. Methods: The effects of once-daily tiotropium/olodaterol (2.5/5 and 5/5 μg) on
endurance time during constant work-rate cycle ergometry (CWRCE) after 6 and
12 weeks of treatment were compared with placebo in patients with COPD in a
randomized, double-blind, placebo-controlled, parallel-group clinical trial.
Endurance time during the endurance shuttle walk test (ESWT) after 6 and 12
weeks of treatment was also evaluated in a subset of patients. Results: A total of 404 patients received treatment, with 165 participating in the
ESWT substudy. A statistically significant improvement in endurance time
during CWRCE was observed after 12 weeks (primary endpoint) with
tiotropium/olodaterol 5/5 µg [14% (p = 0.02)] but not with
tiotropium/olodaterol 2.5/5 µg [9% (p = 0.14)]
versus placebo. In the ESWT substudy, a trend to
improvement in endurance time during ESWT after 12 weeks (key secondary
endpoint) was observed with tiotropium/olodaterol 5/5 µg [21%
(p = 0.055)] and tiotropium/olodaterol 2.5/5 µg [21%
(p = 0.056)] versus placebo. Conclusion: Tiotropium/olodaterol 5/5 µg improved endurance time during cycle ergometry
versus placebo, with a strong tendency to also improve
walking endurance time. [ClinicalTrials.gov identifier: NCT01525615.]
Collapse
Affiliation(s)
- François Maltais
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, 2725 Chemin Sainte-Foy, Québec, QC G1V 4G5, Canada
| | - Denis O'Donnell
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General Hospital, Kingston, Ontario, Canada
| | | | - Anne-Marie Kirsten
- Pulmonary Research Institute at LungClinic Grosshansdorf, Airway Research Center North, Grosshansdorf, Germany
| | - Dave Singh
- Medicines Evaluation Unit, University of Manchester, Manchester, UK
| | | | - Kay Tetzlaff
- Boehringer Ingelheim International GmbH, Ingelheim am Rhein, Germany, and Department of Sports Medicine, University of Tübingen, Tübingen, Germany
| | - Yihua Zhao
- Boehringer Ingelheim Pharmaceuticals Inc., Ridgefield, CT, USA
| | - Richard Casaburi
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA
| |
Collapse
|
3
|
Di Marco F, Sotgiu G, Santus P, O’Donnell DE, Beeh KM, Dore S, Roggi MA, Giuliani L, Blasi F, Centanni S. Long-acting bronchodilators improve exercise capacity in COPD patients: a systematic review and meta-analysis. Respir Res 2018; 19:18. [PMID: 29368604 PMCID: PMC5784692 DOI: 10.1186/s12931-018-0721-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 01/10/2018] [Indexed: 11/22/2022] Open
Abstract
Background We carried out a systematic review and meta-analysis with the aim to evaluate the efficacy of longacting bronchodilators on exercise capacity in COPD patients. Methods The endpoints were the efficacy of long-acting bronchodilators (altogether, and by single classes) vs. placebo in modifying endurance time (ET), inspiratory capacity (IC) and dyspnea during exercise, taking into consideration the outcomes according to different patients’ inclusion criteria and exercise methodology. Results Twenty-two studies were deemed eligible for analysis. Weighted mean increase in ET resulted of 67 s (95% CI ranges from 55 to 79). For isotime IC and dyspnea during exercise, weighted improvements were 195 ml (162–229), and − 0.41 units (− 0.56 to − 0.27), respectively. The increase in trough IC was 157 ml (138–175). We found a trend in favour of LAMA compared to LABA in terms of ET. In the 11 studies which reported a value of functional residual capacity > 120% as inclusion criterion, weighted mean increase in endurance time was 94 s (65 to 123); however we did not find any significant correlation between ET and mean trough IC (P: 0.593). The improvement of ET in the 5 studies using walking as exercise methodology resulted of 58 s (− 4 to 121). Conclusions Long-acting bronchodilators improve exercise capacity in COPD. The main effect of long-acting bronchodilators seems to be a increase of basal IC rather than a modification of dynamic hyperinflation during exercise. The efficacy in terms of endurance time seems higher in studies which enrolled patients with hyperinflation, with a similar efficacy on walking or cycling.
Collapse
Affiliation(s)
- Fabiano Di Marco
- Respiratory Unit, Ospedale San Paolo, Department of Health Science, Università degli Studi di Milano, Via A. di Rudinì, 8-20142 Milan, Italy
| | - Giovanni Sotgiu
- Clinical Epidemiology and Medical Statistics Unit, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Pierachille Santus
- Department of Biomedical And Clinical Sciences (DIBIC), University of Milan, Milan, Italy
- Respiratory Unit, “Luigi Sacco” University Hospital; ASST Fatebenefratelli-Sacco, Milan, Italy
| | - Denis E. O’Donnell
- Division of Respiratory and Critical Care Medicine, Respiratory Investigation Unit, Queen’s University and Kingston General Hospital, Kingston, ON Canada
| | | | - Simone Dore
- Clinical Epidemiology and Medical Statistics Unit, Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | | | - Lisa Giuliani
- Respiratory Unit, Ospedale San Paolo, Department of Health Science, Università degli Studi di Milano, Via A. di Rudinì, 8-20142 Milan, Italy
| | - Francesco Blasi
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Internal Medicine Department, Respiratory Unit and Cystic Fibrosis Adult Center, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinic, Milan, Italy
| | - Stefano Centanni
- Respiratory Unit, Ospedale San Paolo, Department of Health Science, Università degli Studi di Milano, Via A. di Rudinì, 8-20142 Milan, Italy
| |
Collapse
|
4
|
Borel B, Wilkinson-Maitland CA, Hamilton A, Bourbeau J, Perrault H, Jensen D, Maltais F. Three-minute constant rate step test for detecting exertional dyspnea relief after bronchodilation in COPD. Int J Chron Obstruct Pulmon Dis 2016; 11:2991-3000. [PMID: 27942208 PMCID: PMC5136363 DOI: 10.2147/copd.s113113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background The aim of this study was to evaluate the responsiveness of the 3-minute constant rate step test (3-MST) to detect the relief of exertional dyspnea (respiratory discomfort) after acute bronchodilation in COPD patients. Patients and methods A total of 40 patients with moderate-to-severe COPD (mean forced expiratory volume in 1 second: 45.7 (±14.7), % predicted) performed four 3-MSTs at randomly assigned stepping rates of 14, 16, 20 and 24 steps/min after inhalation of nebulized ipratropium bromide (500 µg)/salbutamol (2.5 mg) and saline placebo, which were randomized to order. Patients rated their intensity of perceived dyspnea at the end of each 3-MST using Borg 0–10 category ratio scale. Results A total of 37 (92.5%), 36 (90%), 34 (85%) and 27 (67.5%) patients completed all 3 minutes of exercise at 14, 16, 20 and 24 steps/min under both treatment conditions, respectively. Compared with placebo, ipratropium bromide/salbutamol significantly decreased dyspnea at the end of the third minute of exercise at 14 steps/min (by 0.6±1.0 Borg 0–10 scale units, P<0.01) and 16 steps/min (by 0.7±1.3 Borg 0–10 scale units, P<0.01); however, no statically significant differences were observed between treatments at 20 and 24 steps/min (both P>0.05). Conclusion The 3-MST, when performed at 14 and 16 steps/min, was responsive to detect the relief of exertional dyspnea after acute bronchodilation in patients with moderate-to-severe COPD.
Collapse
Affiliation(s)
- Benoit Borel
- Laboratoire HAVAE, Université de Limoges, Limoges, France; Centre de Recherche, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec
| | - Courtney A Wilkinson-Maitland
- Clinical Exercise and Respiratory Physiology Laboratory, Department of Kinesiology and Physical Education, McGill University, Montréal, QC
| | - Alan Hamilton
- Boehringer Ingelheim (Canada) Limited, Burlington, ON
| | - Jean Bourbeau
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Center, Montreal, QC
| | - Hélène Perrault
- Faculty of Health Sciences, University of Ottawa, Ottawa, ON
| | - Dennis Jensen
- Clinical Exercise and Respiratory Physiology Laboratory, Department of Kinesiology and Physical Education, McGill University, Montréal, QC; Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Center, Montreal, QC; Translational Research in Respiratory Diseases Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - François Maltais
- Centre de Recherche, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec
| |
Collapse
|
5
|
Puente-Maestu L, Palange P, Casaburi R, Laveneziana P, Maltais F, Neder JA, O'Donnell DE, Onorati P, Porszasz J, Rabinovich R, Rossiter HB, Singh S, Troosters T, Ward S. Use of exercise testing in the evaluation of interventional efficacy: an official ERS statement. Eur Respir J 2016; 47:429-60. [DOI: 10.1183/13993003.00745-2015] [Citation(s) in RCA: 255] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 09/14/2015] [Indexed: 12/20/2022]
Abstract
This document reviews 1) the measurement properties of commonly used exercise tests in patients with chronic respiratory diseases and 2) published studies on their utilty and/or evaluation obtained from MEDLINE and Cochrane Library searches between 1990 and March 2015.Exercise tests are reliable and consistently responsive to rehabilitative and pharmacological interventions. Thresholds for clinically important changes in performance are available for several tests. In pulmonary arterial hypertension, the 6-min walk test (6MWT), peak oxygen uptake and ventilation/carbon dioxide output indices appear to be the variables most responsive to vasodilators. While bronchodilators do not always show clinically relevant effects in chronic obstructive pulmonary disease, high-intensity constant work-rate (endurance) tests (CWRET) are considerably more responsive than incremental exercise tests and 6MWTs. High-intensity CWRETs need to be standardised to reduce interindividual variability. Additional physiological information and responsiveness can be obtained from isotime measurements, particularly of inspiratory capacity and dyspnoea. Less evidence is available for the endurance shuttle walk test. Although the incremental shuttle walk test and 6MWT are reliable and less expensive than cardiopulmonary exercise testing, two repetitions are needed at baseline. All exercise tests are safe when recommended precautions are followed, with evidence suggesting that no test is safer than others.
Collapse
|
6
|
Fotheringham I, Meakin G, Punekar YS, Riley JH, Cockle SM, Singh SJ. Comparison of laboratory- and field-based exercise tests for COPD: a systematic review. Int J Chron Obstruct Pulmon Dis 2015; 10:625-43. [PMID: 25834421 PMCID: PMC4372024 DOI: 10.2147/copd.s70518] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Exercise tests are often used to evaluate the functional status of patients with COPD. However, to the best of our knowledge, a comprehensive systematic comparison of these tests has not been performed. We systematically reviewed studies reporting the repeatability and/or reproducibility of these tests, and studies comparing their sensitivity to therapeutic intervention. A systematic review identified primary manuscripts in English reporting relevant data on the following exercise tests: 6-minute walk test (6MWT) and 12-minute walk test, incremental and endurance shuttle walk tests (ISWT and ESWT, respectively), incremental and endurance cycle ergometer tests, and incremental and endurance treadmill tests. We identified 71 relevant studies. Good repeatability (for the 6MWT and ESWT) and reproducibility (for the 6MWT, 12-minute walk test, ISWT, ESWT, and incremental cycle ergometer test) were reported by most studies assessing these tests, providing patients were familiarized with them beforehand. The 6MWT, ISWT, and particularly the ESWT were reported to be sensitive to therapeutic intervention. Protocol variations (eg, track layout or supplemental oxygen use) affected performance significantly in several studies. This review shows that while the validity of several tests has been established, for others further study is required. Future work will assess the link between these tests, physiological mechanisms, and patient-reported measures.
Collapse
Affiliation(s)
- Iain Fotheringham
- Value Demonstration Practice, Oxford PharmaGenesis, Oxford, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Georgina Meakin
- Value Demonstration Practice, Oxford PharmaGenesis, Oxford, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Yogesh Suresh Punekar
- GlaxoSmithKline, Uxbridge, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - John H Riley
- GlaxoSmithKline, Uxbridge, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Sarah M Cockle
- GlaxoSmithKline, Uxbridge, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Sally J Singh
- Department of Respiratory Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK
| |
Collapse
|
7
|
Cooper CB, Celli BR, Jardim JR, Wise RA, Legg D, Guo J, Kesten S. Treadmill endurance during 2-year treatment with tiotropium in patients with COPD: a randomized trial. Chest 2014; 144:490-497. [PMID: 23558890 DOI: 10.1378/chest.12-2613] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Disease progression in COPD is associated with a decline in exercise performance over time. We assessed whether tiotropium might mitigate this by determining its effect on treadmill endurance time (ET) over 2 years. METHODS This was a randomized, double-blind, placebo-controlled trial of tiotropium, 18 μg daily, in patients with COPD (FEV1/FVC < 70%; postbronchodilator FEV1 < 65%). The primary end point was ET at 90% of baseline maximum work rate at 96 weeks. Secondary end points were ET at other visits, ET by smoking status, spirometry, and St. George's Respiratory Questionnaire (SGRQ). RESULTS A total of 519 patients were randomized (tiotropium 260, placebo 259). Mean age was 65 years, 77% were men, 34% were continuing smokers, and mean FEV1 was 1.25 L (44% predicted). Significantly more patients discontinued placebo (hazard ratio [95% CI], 0.61 [0.44-0.83]). Baseline ET was 301 s (improvement tiotropium/placebo was 13% overall; P = .009; 18% at 48 weeks, P = .004; 13% at 96 weeks, P = .106). In patients with baseline ET between 2 and 10 min (n = 404), improvement at 96 weeks was 19% (P = .04). Current smokers had higher ET with tiotropium vs placebo (P = .018). FEV1/FVC improved with tiotropium (P < .01). SGRQ total score at 96 weeks improved with tiotropium vs placebo by 4.03 units (P = .007). CONCLUSIONS Treadmill ET was numerically greater over 2 years with tiotropium vs placebo. However, the 96-week difference was not statistically significant. Spirometry and health status also improved with tiotropium over 2 years, attesting to the benefits of long-acting bronchodilator therapy. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT00525512; URL: www.clinicaltrials.gov.
Collapse
Affiliation(s)
| | | | | | - Robert A Wise
- Johns Hopkins Asthma and Allergy Center, Baltimore, MD
| | - Daniel Legg
- Boehringer Ingelheim Pharmaceuticals Inc, Ridgefield, CT
| | - Junhai Guo
- Boehringer Ingelheim Pharmaceuticals Inc, Ridgefield, CT
| | | |
Collapse
|
8
|
Maltais F. Exercise and COPD: therapeutic responses, disease-related outcomes, and activity-promotion strategies. PHYSICIAN SPORTSMED 2013; 41:66-80. [PMID: 23445862 DOI: 10.3810/psm.2013.02.2001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) reduces patients' exercise capacities and their abilities to perform daily physical activities, thereby increasing morbidity and mortality rates. The cycle of dyspnea, deconditioning, and declining physical activity not only accelerates the progression of COPD but also increases the risk for developing or aggravating metabolic and cardiovascular diseases. Cardiovascular and metabolic comorbidities also limit physical function, and their disabling effects in combination with COPD may be greater than the effects of each disease alone. The impact of COPD and its treatment on the ability to exercise, and the degree of physical activity in daily life, can be measured by field-based tests (eg, the 6-minute walk test or incremental and endurance shuttle-walk test), laboratory-based tests (eg, incremental or constant work-rate treadmill and cycle-ergometer tests), and physical activity assessments (eg, questionnaires and accelerometers). Walking tests increase oxygen consumption and desaturation in patients with COPD more than cycling tests with similar work-rate profiles and may more closely resemble patients' normal activities. Despite the questionable relevance of exercise testing to patients' daily functionality, exercise parameters remain important predictors of survival in patients with COPD. Treatment of COPD (pharmacotherapy, pulmonary rehabilitation, or both) can increase exercise capacity and physical activity in daily life, which potentially slows the decline of lung function, reduces the frequencies of exacerbations and hospitalizations, decreases mortality, slows the progression of comorbidities, improves health-related quality of life, and increases the activity reserve for routine function. This article examines the interactions of reduced physical activity and decreased exercise capacity with the progression of COPD, comorbidities, and mortality. The article also describes the available exercise tests for patients with COPD and reviews the evidence indicating that treating COPD improves exercise capacity. Notably, it appears that even mild COPD reduces exercise capacity and daily physical activity, indicating the need for early intervention.
Collapse
|
9
|
Persson AB, Persson PB. Cycling in physiology. Acta Physiol (Oxf) 2012; 206:1-3. [PMID: 22863297 DOI: 10.1111/j.1748-1716.2012.02446.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Magnussen H, Paggiaro P, Schmidt H, Kesten S, Metzdorf N, Maltais F. Effect of combination treatment on lung volumes and exercise endurance time in COPD. Respir Med 2012; 106:1413-20. [PMID: 22749044 DOI: 10.1016/j.rmed.2012.05.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/24/2012] [Accepted: 05/27/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND Data comparing two bronchodilators vs. one bronchodilator plus inhaled corticosteroid (ICS) on hyperinflation and exercise endurance in chronic obstructive pulmonary disease (COPD) are scarce, though these therapeutic strategies are widely used in clinical practice. METHODS We performed a randomized, crossover clinical trial of two × 8 weeks comparing tiotropium (18 μg once daily) + salmeterol (50 μg twice daily) (T + S) to salmeterol + fluticasone (50/500 μg twice daily) (S + F) in COPD (forced expiratory volume in 1 s (FEV(1)) ≤65% predicted, and thoracic gas volume (TGV) ≥120% predicted). Coprimary endpoints were postbronchodilator TGV and exercise endurance time (EET). RESULTS In 309 patients, at baseline, prebronchodilator FEV(1) was 1.36 L (46% predicted), TGV was 5.42 L (165% predicted), and EET = 458 s. Relative to S + F, T + S lowered postdose TGV by 182 ± 44 ml after 4 weeks (p < 0.0001) and 87 ± 44 ml after 8 weeks (p < 0.05). EET was nonsignificantly increased following T + S treatment (20 ± 15 s at 4 weeks, 15 ± 13 s at 8 weeks) vs. S + F. BORG dyspnea score at exercise isotime was reduced in favor of T + S. CONCLUSION The two bronchodilators decreased hyperinflation significantly more than one bronchodilator and ICS. This difference was not reflected in EET. (ClinicalTrials.gov number, NCT00530842).
Collapse
Affiliation(s)
- Helgo Magnussen
- Pulmonary Research Institute at Hospital Grosshansdorf, Center for Pneumology and Thoracic Surgery, Woehrendamm 80, D-22927 Grosshansdorf, Germany.
| | | | | | | | | | | |
Collapse
|
11
|
Mahler DA, Gifford AH, Waterman LA, Ward J, Machala S, Baird JC. Mechanism of greater oxygen desaturation during walking compared with cycling in patients with COPD. Chest 2011; 140:351-358. [PMID: 21273296 DOI: 10.1378/chest.10-2415] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Patients with COPD exhibit greater oxyhemoglobin desaturation during walking than with cycling. The purpose of this investigation was to investigate differences in ventilatory responses and gas exchange as proposed mechanisms for this observation. METHODS Arterial blood gas and lactate levels were measured in 12 patients with COPD (aged 68 ± 6 years) during incremental treadmill and cycle exercise. The primary outcome to assess the ventilatory response to exercise was Pao₂. The primary outcome to assess impairment in exercise gas exchange was the difference between partial pressures of alveolar and arterial oxygen (Pao₂ - Pao₂). RESULTS Pao₂ in patients was significantly lower at peak exercise for treadmill walking (51.4 ± 6.8 mm Hg) compared with cycling (60.4 ± 10.7 mm Hg) (P = .002). The initial increase in Pao₂ with cycling occurred prior to the onset of the anaerobic threshold. At peak exercise, Pao₂ was significantly higher with cycling compared with walking (P = .004). The anaerobic threshold occurred at a lower oxygen consumption during cycling than walking (P = .001), and peak lactate levels were higher with cycling (P = .019). With progressive exercise, Pao₂ - Pao₂ increased similarly during treadmill and cycle exercise. CONCLUSIONS The higher Pao₂ during cycling minimized the magnitude of oxyhemoglobin desaturation compared with walking. The enhanced respiratory stimulation during cycling appears due to an initial neurogenic process, possibly originating in receptors of exercising muscles, and a subsequent earlier onset of anaerobic metabolism with higher lactate levels during cycling.
Collapse
Affiliation(s)
- Donald A Mahler
- Section of Pulmonary and Critical Care Medicine, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, Lebanon, NH.
| | - Alex H Gifford
- Section of Pulmonary and Critical Care Medicine, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - Laurie A Waterman
- Pulmonary Function and Cardiopulmonary Exercise Laboratories, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - Joseph Ward
- Pulmonary Function and Cardiopulmonary Exercise Laboratories, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - Sasa Machala
- Section of Pulmonary and Critical Care Medicine, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - John C Baird
- Section of Pulmonary and Critical Care Medicine, Dartmouth Medical School, Dartmouth-Hitchcock Medical Center, Lebanon, NH; Psychological Applications, South Pomfret, VT
| |
Collapse
|