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Yamaguchi T, Matsuda Y, Watanabe H, Kako J, Kasahara Y, Goya S, Kohara H, Mori M, Nakayama T. Treatment Recommendation for Dyspnea in Patients with Advanced Disease: Revised Clinical Guidelines from the Japanese Society for Palliative Medicine. J Palliat Med 2024. [PMID: 39052451 DOI: 10.1089/jpm.2023.0667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2024] Open
Abstract
Dyspnea is one of the most common and distressing symptoms in patients with cancer and noncancer advanced diseases. The Japanese Society for Palliative Medicine revised previous guidelines for the management of respiratory symptoms in patients with cancer and newly developed clinical guidelines for managing dyspnea in patients with advanced disease, based on the result of systematic reviews for each clinical question and consensus among experts. We describe the recommendations of the guidelines as well as provide insights into the reasoning behind the recommendations and their development process. There has been a paucity of evidence regarding the interventions for dyspnea in patients with advanced disease. Thus, more clinical research that includes not only randomized controlled trials but also real-world observational studies is warranted.
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Affiliation(s)
- Takashi Yamaguchi
- Department of Palliative Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshinobu Matsuda
- Department of Psychosomatic Internal Medicine, NHO Kinki Chuo Chest Medical Center, Sakai, Japan
| | | | - Jun Kako
- Graduate School of Medicine, Mie University, Tsu, Japan
| | - Yoko Kasahara
- Department of Pharmacy, Hiroshima Prefectural Hospital, Hiroshima, Japan
| | - Sho Goya
- Department of Respiratory Medicine, Kinki Central Hospital of the Mutual Aid Association of Public School Teachers, Itami, Japan
| | - Hiroyuki Kohara
- Department of Internal Medicine, Hatsukaichi Memorial Hospital, Hatsukaichi, Japan
| | - Masanori Mori
- Division of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu, Japan
| | - Takeo Nakayama
- Department of Health Informatics, Kyoto University School of Public Health, Kyoto, Japan
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Koopman M, Posthuma R, Vanfleteren LEGW, Simons SO, Franssen FME. Lung Hyperinflation as Treatable Trait in Chronic Obstructive Pulmonary Disease: A Narrative Review. Int J Chron Obstruct Pulmon Dis 2024; 19:1561-1578. [PMID: 38974815 PMCID: PMC11227310 DOI: 10.2147/copd.s458324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 06/12/2024] [Indexed: 07/09/2024] Open
Abstract
Lung hyperinflation (LH) is a common clinical feature in patients with chronic obstructive pulmonary disease (COPD). It results from a combination of reduced elastic lung recoil as a consequence of irreversible destruction of lung parenchyma and expiratory airflow limitation. LH is an important determinant of morbidity and mortality in COPD, partially independent of the degree of airflow limitation. Therefore, reducing LH has become a major target in the treatment of COPD over the last decades. Advances were made in the diagnostics of LH and several effective interventions became available. Moreover, there is increasing evidence suggesting that LH is not only an isolated feature in COPD but rather part of a distinct clinical phenotype that may require a more integrated management. This narrative review focuses on the pathophysiology and adverse consequences of LH, the assessment of LH with lung function measurements and imaging techniques and highlights LH as a treatable trait in COPD. Finally, several suggestions regarding future studies in this field are made.
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Affiliation(s)
- Maud Koopman
- Research and Development, Ciro+, Horn, the Netherlands
- NUTRIM, Institute of Nutrition and Translational Research in Metabolism, University Maastricht, Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Rein Posthuma
- Research and Development, Ciro+, Horn, the Netherlands
- NUTRIM, Institute of Nutrition and Translational Research in Metabolism, University Maastricht, Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Lowie E G W Vanfleteren
- COPD Center, Institute of Medicine, Sahlgrenska University Hospital, University of Gothenburg, Gothenburg, Sweden
| | - Sami O Simons
- NUTRIM, Institute of Nutrition and Translational Research in Metabolism, University Maastricht, Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
| | - Frits M E Franssen
- Research and Development, Ciro+, Horn, the Netherlands
- NUTRIM, Institute of Nutrition and Translational Research in Metabolism, University Maastricht, Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands
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Holland AE, Spathis A, Marsaa K, Bausewein C, Ahmadi Z, Burge AT, Pascoe A, Gadowski AM, Collis P, Jelen T, Reilly CC, Reinke LF, Romero L, Russell AM, Saggu R, Solheim J, Vagheggini G, Vandendungen C, Wijsenbeek M, Tonia T, Smallwood N, Ekström M. European Respiratory Society clinical practice guideline on symptom management for adults with serious respiratory illness. Eur Respir J 2024; 63:2400335. [PMID: 38719772 DOI: 10.1183/13993003.00335-2024] [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: 02/15/2024] [Accepted: 03/19/2024] [Indexed: 06/30/2024]
Abstract
Respiratory symptoms are ubiquitous and impair health-related quality of life in people with respiratory disease. This European Respiratory Society (ERS) task force aimed to provide recommendations for symptomatic treatment in people with serious respiratory illness. The ERS task force comprised 16 members, including representatives of people with serious respiratory illness and informal caregivers. Seven questions were formulated, six in the PICO (Population, Intervention, Comparison, Outcome) format, which were addressed with full systematic reviews and evidence assessed using GRADE (Grading of Recommendations Assessment, Development and Evaluation). One question was addressed narratively. An "evidence-to-decision" framework was used to formulate recommendations. To treat symptoms in people with serious respiratory illness, the task force suggests the use of graded exercise therapy (conditional recommendation, low certainty of evidence); and suggests the use of a multicomponent services, handheld fan and breathing techniques (conditional recommendations, very low certainty of evidence). The task force suggests not to use opioids (conditional recommendation, very low certainty of evidence); and suggests either administering or not administering supplemental oxygen therapy (conditional recommendation, low certainty of evidence). The task force suggests that needs assessment tools may be used as part of a comprehensive needs assessment, but do not replace patient-centred care and shared decision making (conditional recommendation, low certainty of evidence). The low certainty of evidence, modest impact of interventions on patient-centred outcomes, and absence of effective strategies to ameliorate cough highlight the need for new approaches to reduce symptoms and enhance wellbeing for individuals who live with serious respiratory illness.
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Affiliation(s)
- Anne E Holland
- Departments of Physiotherapy and Respiratory Medicine, Alfred Health, Melbourne, Australia
- School of Translational Medicine, Monash University, Melbourne, Australia
- Institute for Breathing and Sleep, Melbourne, Australia
| | - Anna Spathis
- Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Kristoffer Marsaa
- Department of Multidisease, North Zealand Hospital, Copenhagen University, Hilleroed, Denmark
| | - Claudia Bausewein
- Department of Palliative Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Zainab Ahmadi
- Respiratory Medicine, Allergology and Palliative Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Angela T Burge
- School of Translational Medicine, Monash University, Melbourne, Australia
- Department of Physiotherapy, Alfred Health, Melbourne, Australia
| | - Amy Pascoe
- School of Translational Medicine, Monash University, Melbourne, Australia
| | - Adelle M Gadowski
- School of Translational Medicine, Monash University, Melbourne, Australia
| | - Phil Collis
- CPROR Birmingham University, Birmingham, UK
- Patient Advisory Group, European Lung Foundation, Sheffield, UK
| | - Tessa Jelen
- Patient Advisory Group, European Lung Foundation, Sheffield, UK
| | - Charles C Reilly
- Department of Physiotherapy, King's College Hospital, London, UK
- Cicely Saunders Institute of Palliative Care, Policy and Rehabilitation, King's College London, London, UK
| | - Lynn F Reinke
- College of Nursing, University of Utah, Salt Lake City, UT, USA
| | - Lorena Romero
- The Ian Potter Library, Alfred Health, Melbourne, Australia
| | - Anne-Marie Russell
- Institute of Clinical Sciences, University of Birmingham, Birmingham, UK
- Birmingham Regional NHS Interstitial Lung Disease and Occupational Lung Disease Service, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Ravijyot Saggu
- Pharmacy Medicines Management Team, Central London Community Healthcare Trust, London, UK
| | - John Solheim
- EU-PFF - European Pulmonary Fibrosis Federation, Overijse, Belgium
- LHL-IPF, Jessheim, Norway
| | - Guido Vagheggini
- Department of Internal Medicine and Medical Specialties, Respiratory Failure Pathway, Azienda USL Toscana Nordovest, Pisa, Italy
- Fondazione Volterra Ricerche ONLUS, Volterra, Italy
| | - Chantal Vandendungen
- EU-PFF - European Pulmonary Fibrosis Federation, Overijse, Belgium
- ABFFP - Association Belge Francophone Contre la Fibrose Pulmonaire, Rebecq, Belgium
| | - Marlies Wijsenbeek
- Department of Respiratory Medicine, Erasmus University Medical Center, Center of Excellence for Interstitial Lung Disease, Rotterdam, The Netherlands
| | - Thomy Tonia
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Natasha Smallwood
- School of Translational Medicine, Monash University, Melbourne, Australia
- Department of Respiratory Medicine, Alfred Health, Melbourne, Australia
- Joint last authors
| | - Magnus Ekström
- Respiratory Medicine, Allergology and Palliative Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
- Joint last authors
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Man W, Chaplin E, Daynes E, Drummond A, Evans RA, Greening NJ, Nolan C, Pavitt MJ, Roberts NJ, Vogiatzis I, Singh SJ. British Thoracic Society Clinical Statement on pulmonary rehabilitation. Thorax 2023; 78:s2-s15. [PMID: 37770084 DOI: 10.1136/thorax-2023-220439] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Affiliation(s)
- William Man
- Royal Brompton & Harefield Hospitals, Guy's and St.Thomas' NHS Foundation Trust, London, UK
| | - Emma Chaplin
- Centre for Exercise and Rehabilitation Science, NIHR Biomedical Research Centre - Respiratory, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Enya Daynes
- Centre for Exercise and Rehabilitation Science, NIHR Biomedical Research Centre - Respiratory, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
- Department of Respiratory Sciences, Institute for Lung Health, University of Leicester, Leicester, UK
| | - Alistair Drummond
- Royal Brompton & Harefield Hospitals, Guy's and St.Thomas' NHS Foundation Trust, London, UK
| | - Rachael A Evans
- Centre for Exercise and Rehabilitation Science, NIHR Biomedical Research Centre - Respiratory, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
- Department of Respiratory Sciences, Institute for Lung Health, University of Leicester, Leicester, UK
| | - Neil J Greening
- Centre for Exercise and Rehabilitation Science, NIHR Biomedical Research Centre - Respiratory, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
- Department of Respiratory Sciences, Institute for Lung Health, University of Leicester, Leicester, UK
| | - Claire Nolan
- Royal Brompton & Harefield Hospitals, Guy's and St.Thomas' NHS Foundation Trust, London, UK
- Department of Health Sciences, College of Health Medicine and Life Sciences, Brunel University London, London, UK
| | - Matthew J Pavitt
- University Hospitals Sussex NHS Foundation Trust, Brighton, UK
- Brighton and Sussex Medical School, Brighton, UK
| | - Nicola J Roberts
- School of Health and Social Care, Edinburgh Napier University, Edinburgh, UK
| | - Ioannis Vogiatzis
- Department of Sport, Exercise and Rehabilitation, School of Health and Life Sciences, Northumberland University Newcastle, Newcastle Upon Tyne, UK
| | - Sally J Singh
- Centre for Exercise and Rehabilitation Science, NIHR Biomedical Research Centre - Respiratory, Glenfield Hospital, University Hospitals of Leicester NHS Trust, Leicester, UK
- Department of Respiratory Sciences, Institute for Lung Health, University of Leicester, Leicester, UK
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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.
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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
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Troosters T, Janssens W, Demeyer H, Rabinovich RA. Pulmonary rehabilitation and physical interventions. Eur Respir Rev 2023; 32:32/168/220222. [PMID: 37286219 DOI: 10.1183/16000617.0222-2022] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 03/23/2023] [Indexed: 06/09/2023] Open
Abstract
Pulmonary rehabilitation has established a status of evidence-based therapy for patients with symptomatic COPD in the stable phase and after acute exacerbations. Rehabilitation should have the possibility of including different disciplines and be offered in several formats and lines of healthcare. This review focusses on the cornerstone intervention, exercise training, and how training interventions can be adapted to the limitations of patients. These adaptations may lead to altered cardiovascular or muscular training effects and/or may improve movement efficiency. Optimising pharmacotherapy (not the focus of this review) and oxygen supplements, whole-body low- and high-intensity training or interval training, and resistance (or neuromuscular electrical stimulation) training are important training modalities for these patients in order to accommodate cardiovascular and ventilatory impairments. Inspiratory muscle training and whole-body vibration may also be worthwhile interventions in selected patients. Patients with stable but symptomatic COPD, those who have suffered exacerbations and patients waiting for or who have received lung volume reduction or lung transplantation are good candidates. The future surely holds promise to further personalise exercise training interventions and to tailor the format of rehabilitation to the individual patient's needs and preferences.
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Affiliation(s)
- Thierry Troosters
- KU Leuven, Department of Rehabilitation Sciences, Leuven, Belgium
- Respiratory Division, University Hospitals Leuven, Leuven, Belgium
| | - Wim Janssens
- Respiratory Division, University Hospitals Leuven, Leuven, Belgium
- KU Leuven, Department of Chronic Disease and Metabolism, Leuven, Belgium
| | - Heleen Demeyer
- KU Leuven, Department of Rehabilitation Sciences, Leuven, Belgium
- Respiratory Division, University Hospitals Leuven, Leuven, Belgium
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium
| | - Roberto A Rabinovich
- University of Edinburgh, MRC Centre for Information Research, Edinburgh, UK
- Respiratory Department, Royal Infirmary of Edinburgh, Edinburgh, UK
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Hasegawa T, Ochi T, Goya S, Matsuda Y, Kako J, Watanabe H, Kasahara Y, Kohara H, Mori M, Nakayama T, Yamaguchi T. Efficacy of supplemental oxygen for dyspnea relief in patients with advanced progressive illness: A systematic review and meta-analysis. Respir Investig 2023; 61:418-437. [PMID: 37105126 DOI: 10.1016/j.resinv.2023.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/27/2023] [Accepted: 03/15/2023] [Indexed: 04/29/2023]
Abstract
BACKGROUND Supplemental oxygen is widely used for dyspnea relief; however, its efficacy is yet to be verified. This study aimed to determine the efficacy of supplemental oxygen for dyspnea relief in patients with advanced progressive illness. METHODS In this systematic review, several databases, including MEDLINE and EMBASE, were searched to identify eligible randomized controlled trials (RCTs) on the topic published up to September 23, 2019. The search criteria included RCTs investigating patients with advanced progressive illness (advanced cancer, chronic obstructive pulmonary disease, and chronic heart failure). The study protocol was registered with PROSPERO (No. CRD42020161838). Separate analyses were pre-planned regarding the presence or absence of resting hypoxemia. RESULTS RCTs investigating supplemental oxygen for dyspnea relief in participants with and without resting hypoxemia (39 and five, respectively) were included in the study. Heterogeneity of supplemental oxygen for dyspnea in RCTs, including participants without resting hypoxemia was evident; hence, post-hoc analyses in four subgroups (supplemental oxygen during exercise or daily activities, short-burst oxygen, continuous supplemental oxygen, and supplemental oxygen during rehabilitation intervention) were conducted. In the meta-analysis, supplemental oxygen during exercise was found to improve dyspnea in patients without resting hypoxemia compared with that in the control (standardized mean difference = -0.57, 95% confidence interval = -0.77 to -0.38). However, supplemental oxygen for the other subgroups failed to improve patients' dyspnea. CONCLUSION The results of this systematic review do not support supplemental oxygen therapy for dyspnea relief in patients with advanced progressive illness, except during exercise.
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Affiliation(s)
- Takaaki Hasegawa
- Center for Psycho-oncology and Palliative Care, Nagoya City University Hospital, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-0001, Japan.
| | - Takura Ochi
- Hospice, Matsuyama Bethel Hospital, 6-1229 Iwaidani, Matsuyama, Ehime 790-0833, Japan
| | - Sho Goya
- Department of Respiratory Medicine, Kinki Central Hospital of the Mutual Aid Association of Public School Teachers, 3-1 Kurumazuka, Itami, Hyogo 664-8533, Japan
| | - Yoshinobu Matsuda
- Department of Psychosomatic Internal Medicine, National Hospital Organization Kinki-Chuo Chest Medical Center, 1180 Nagasone-cho, Kita-ku, Sakai, Osaka 591-8025, Japan
| | - Jun Kako
- College of Nursing Art and Science, University of Hyogo, 8-2-1 Gakuen Nishimachi, Nishi-ku, Kobe, Hyogo 651-2197, Japan
| | - Hiroaki Watanabe
- Home Palliative Care Asunaro Clinic, 1-35, Joubushi, Komaki, Aichi 485-0044, Japan
| | - Yoko Kasahara
- Department of Pharmacy, Hiroshima Prefectural Hospital, 1-5-54, Ujinakanda, Minami-ku, Hiroshima 734-0004, Japan
| | - Hiroyuki Kohara
- Department of Internal Medicine, Hatsukaichi Memorial Hospital, 5-12 Yokodai, Hatsukaichi, Hiroshima 738-0060, Japan
| | - Masanori Mori
- Palliative and Supportive Care Division, Seirei Mikatahara General Hospital, 3453 Mikatahara-cho, Kita-ku, Hamamatsu, Shizuoka 433-8105, Japan
| | - Takeo Nakayama
- Department of Health Informatics, Kyoto University School of Public Health, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Takashi Yamaguchi
- Department of Palliative Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan
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DeMarco B, MacRosty CR. Bronchoscopic Management of COPD and Advances in Therapy. Life (Basel) 2023; 13:life13041036. [PMID: 37109565 PMCID: PMC10147055 DOI: 10.3390/life13041036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/06/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Chronic Obstructive Pulmonary Disease (COPD) is a highly prevalent and morbid disease marked by irreversible structural changes in the lungs. Bronchoscopic therapies have significantly expanded the treatment armamentarium for patients with persistent symptoms by reducing the physiologic detriments of hyperinflation in a less invasive fashion than surgical lung volume reduction. The spectrum of bronchoscopic techniques to reduce hyperinflation includes endobronchial valves, coils, thermal ablation, and biologic sealants. Other therapies focus on reducing parasympathetic tone and mucus hypersecretion and include targeted lung denervation, bronchial rheoplasty, and cryospray techniques. In this article, we will review the variety of techniques for bronchoscopic lung volume reduction, both established and investigational, along with their respective benefits and complications and will briefly review other investigational therapies for COPD.
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Affiliation(s)
- Benjamin DeMarco
- Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
| | - Christina R MacRosty
- Section of Interventional Pulmonology and Pulmonary Oncology, Division of Pulmonary Diseases and Critical Care Medicine, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
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Schneeberger T, Jarosch I, Leitl D, Gloeckl R, Hitzl W, Dennis CJ, Geyer T, Criée CP, Koczulla AR, Kenn K. Automatic oxygen titration versus constant oxygen flow rates during walking in COPD: a randomised controlled, double-blind, crossover trial. Thorax 2023; 78:326-334. [PMID: 34656996 PMCID: PMC10086462 DOI: 10.1136/thoraxjnl-2020-216509] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 09/05/2021] [Indexed: 11/04/2022]
Abstract
RATIONALE In patients with COPD, oxygen (O2)-supplementation via a constant flow oxygen system (CFOS) can result in insufficient oxygen saturation (SpO2 <90%) during exercise. An automatically titrating O2-system (ATOS) has been shown to be beneficial compared with an untitrated CFOS, however, it is unknown if ATOS is superior to CFOS, titrated during exercise as stipulated by guidelines. The aim was to investigate the effects of ATOS compared with titrated CFOS on walking capacity in people with hypoxaemic COPD. METHODS Fifty participants completed this prospective randomised controlled, double-blind, crossover trial. Participants performed two endurance shuttle walk tests (ESWTs) with: (1) exercise titrated CFOS (ESWTCFOS) and (2) ATOS targeting an SpO2 of 92% (ESWTATOS). Primary outcome measure was walking time. Secondary measures were SpO2, transcutaneous-PCO2 (TcPCO2), respiratory rate (RR), heart rate (HR) at isotime (end of shortest ESWT) with blood gases and dyspnoea at rest and end exercise. RESULTS Participants (median (IQR): age 66 (59, 70) years, FEV1 28.8 (24.8, 35.1) % predicted, PO2 54.7 (51.0, 57.7) mm Hg, PCO2 44.2 (38.2, 47.8) mm Hg) walked significantly longer with ESWTATOS in comparison to ESWTCFOS (median effect (95% CI) +144.5 (54 to 241.5) s, p<0.001). At isotime, SpO2 was significantly higher (+3 (95% CI 1 to 4) %, p<0.001) with ATOS while TcPCO2, RR and HR were comparable. End exercise, PO2 (+8.85 (95% CI 6.35 to 11.9) mm Hg) and dyspnoea (-0.5 (95% CI -1.0 to -0.5) points) differed significantly in favour of ATOS (each p<0.001) while PCO2 was comparable. CONCLUSION In patients with hypoxaemia with severe COPD the use of ATOS leads to significant, clinically relevant improvements in walking endurance time, SpO2, PO2 and dyspnoea with no impact on PCO2. TRIAL REGISTRATION NUMBER NCT03803384.
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Affiliation(s)
- Tessa Schneeberger
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
| | - Inga Jarosch
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
| | - Daniela Leitl
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
| | - Rainer Gloeckl
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
| | - Wolfgang Hitzl
- Research Office (Biostatistics), Paracelsus Medical University Salzburg, Salzburg, Austria
- Department of Ophthalmology and Optometry, Paracelsus Medical University Salzburg, Salzburg, Austria
- Research Program Experimental Ophthalmology and Glaucoma Research, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Clancy John Dennis
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Tatjana Geyer
- Medical School, Philipps-University of Marburg, Marburg, Hessen, Germany
| | - Carl-Peter Criée
- Department of Sleep and Respiratory Medicine, Evangelical Hospital Goettingen-Weende, Bovenden, Germany
| | - Andreas Rembert Koczulla
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center, Giessen, Hessen, Germany
- Teaching Hospital, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Klaus Kenn
- Department of Pulmonary Rehabilitation, Philipps-University of Marburg, Marburg, Hessen, Germany
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany
- German Center for Lung Research (DZL), Universities of Giessen and Marburg Lung Center, Giessen, Hessen, Germany
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10
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Fahimi F, Pourdowlat G, Behzadnia N, Mostofi SS, Forough AS, Parto O, Esmaeili A. Clinical evaluation of nebulized verapamil in out‐patients with pulmonary hypertension secondary to chronic obstructive pulmonary disease. THE CLINICAL RESPIRATORY JOURNAL 2022; 16:802-811. [DOI: 10.1111/crj.13551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 08/26/2022] [Accepted: 09/12/2022] [Indexed: 11/09/2022]
Affiliation(s)
| | - Guitti Pourdowlat
- Chronic Respiratory Disease Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD) Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Neda Behzadnia
- Chronic Respiratory Disease Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD) Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Sahar Sadigh Mostofi
- Clinical Pharmacy Department, School of Pharmacy Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Aida Sefidani Forough
- School of Clinical Sciences, Faculty of Health Queensland University of Technology (QUT) Brisbane Australia
| | - Omid Parto
- Concorde Career College Garden Grove California USA
| | - Ayda Esmaeili
- Experimental and Applied Pharmaceutical Sciences Research Center Urmia University of Medical Sciences Urmia Iran
- Department of Clinical Pharmacy, School of Pharmacy Urmia University of Medical Sciences Urmia Iran
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11
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Megaritis D, Wagner PD, Vogiatzis I. Ergogenic value of oxygen supplementation in chronic obstructive pulmonary disease. Intern Emerg Med 2022; 17:1277-1286. [PMID: 35819698 PMCID: PMC9352614 DOI: 10.1007/s11739-022-03037-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/16/2022] [Indexed: 11/05/2022]
Abstract
Patients with COPD exhibit limited exercise endurance time compared to healthy age-matched individuals. Oxygen supplementation is often applied to improve endurance time during pulmonary rehabilitation in patients with COPD and thus a comprehensive understanding of the mechanisms leading to improved endurance is desirable. This review analyses data from two studies by our research group investigating the effect of oxygen supplementation on cerebrovascular, systemic, respiratory and locomotor muscle oxygen availability on the same cohort of individuals with advanced COPD, and the mechanisms associated with improved endurance time in hyperoxia, which was essentially doubled (at the same power output). In hyperoxia at isotime (the time at which patients became exhausted in normoxia) exercise was associated with greater respiratory and locomotor muscle (but not frontal cortex) oxygen delivery (despite lower cardiac output), lower lactate concentration and less tachypnoea. Frontal cortex oxygen saturation was higher, and respiratory drive lower. Hence, improved endurance in hyperoxia appears to be facilitated by several factors: increased oxygen availability to the respiratory and locomotor muscles, less metabolic acidosis, and lower respiratory drive. At exhaustion in both normoxia and hyperoxia, only cardiac output and breathing pattern were not different between conditions. However, minute ventilation in hyperoxia exceeded the critical level of ventilatory constraints (VE/MVV > 75-80%). Lactate remained lower and respiratory and locomotor muscle oxygen delivery greater in hyperoxia, suggesting greater muscle oxygen availability improving muscle function. Taken together, these findings suggest that central haemodynamic and ventilatory limitations and not contracting muscle conditions dictate endurance time in COPD during exercise in hyperoxia.
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Affiliation(s)
- Dimitrios Megaritis
- grid.42629.3b0000000121965555Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Tyne and Wear, Newcastle upon Tyne, UK
| | - Peter D. Wagner
- grid.42629.3b0000000121965555Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Tyne and Wear, Newcastle upon Tyne, UK
- grid.266100.30000 0001 2107 4242Department of Medicine, University of California, San Diego, CA USA
| | - Ioannis Vogiatzis
- grid.42629.3b0000000121965555Department of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University, Tyne and Wear, Newcastle upon Tyne, UK
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12
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Jha A, Ward T, Walker S, Goodwin AT, Chalmers JD. Review of the British Thoracic Society Winter Meeting 2021, 24-26 November 2021. Thorax 2022; 77:1030-1035. [PMID: 35907640 DOI: 10.1136/thorax-2022-219150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/13/2022] [Indexed: 11/04/2022]
Abstract
The Winter Meeting of the British Thoracic Society (BTS) is a platform for the latest clinical and scientific research in respiratory medicine. This review summarises the key symposia and presentations from the BTS Winter Meeting 2021 held online due to the COVID-19 pandemic.
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Affiliation(s)
- Akhilesh Jha
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Tom Ward
- Department of Respiratory Sciences, University of Leicester, Leicester, UK
| | - Steven Walker
- School of Clinical Sciences, University of Bristol Academic Respiratory Unit, Westbury on Trym, UK
| | - Amanda T Goodwin
- Nottingham NIHR Respiratory Biomedical Research Centre, University of Nottingham, Nottingham, UK
| | - James D Chalmers
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, UK
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13
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Hill K, Dolmage TE. Take a Deep Breath: More Support for Noninvasive Ventilation During Exercise in People With COPD. Chest 2021; 160:1991-1992. [PMID: 34872659 DOI: 10.1016/j.chest.2021.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/22/2021] [Accepted: 09/03/2021] [Indexed: 10/19/2022] Open
Affiliation(s)
- Kylie Hill
- Curtin enAble Institute and Curtin School of Allied Health, Faculty of Health Sciences, Curtin University, Perth, WA, Australia; Institute for Respiratory Health, Perth, WA, Australia.
| | - Thomas E Dolmage
- Department of Respiratory Medicine and Respiratory Diagnostic & Evaluation Services, West Park Healthcare Centre, Toronto, ON, Canada
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14
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Neder JA, Berton DC, Phillips DB, O'Donnell DE. Exertional ventilation/carbon dioxide output relationship in COPD: from physiological mechanisms to clinical applications. Eur Respir Rev 2021; 30:30/161/200190. [PMID: 34526312 PMCID: PMC9489189 DOI: 10.1183/16000617.0190-2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/30/2020] [Indexed: 01/09/2023] Open
Abstract
There is well established evidence that the minute ventilation (V′E)/carbon dioxide output (V′CO2) relationship is relevant to a number of patient-related outcomes in COPD. In most circumstances, an increased V′E/V′CO2 reflects an enlarged physiological dead space (“wasted” ventilation), although alveolar hyperventilation (largely due to increased chemosensitivity) may play an adjunct role, particularly in patients with coexistent cardiovascular disease. The V′E/V′CO2 nadir, in particular, has been found to be an important predictor of dyspnoea and poor exercise tolerance, even in patients with largely preserved forced expiratory volume in 1 s. As the disease progresses, a high nadir might help to unravel the cause of disproportionate breathlessness. When analysed in association with measurements of dynamic inspiratory constraints, a high V′E/V′CO2 is valuable to ascertain a role for the “lungs” in limiting dyspnoeic patients. Regardless of disease severity, cardiocirculatory (heart failure and pulmonary hypertension) and respiratory (lung fibrosis) comorbidities can further increase V′E/V′CO2. A high V′E/V′CO2 is a predictor of poor outcome in lung resection surgery, adding value to resting lung hyperinflation in predicting all-cause and respiratory mortality across the spectrum of disease severity. Considering its potential usefulness, the V′E/V′CO2 should be valued in the clinical management of patients with COPD. The minute ventilation/carbon dioxide production relationship is relevant to a number of patient-related outcomes in COPD. Minute ventilation/carbon dioxide production, therefore, should be valued in the clinical management of these patients.https://bit.ly/3df2upH
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Affiliation(s)
- J Alberto Neder
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada
| | - Danilo C Berton
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada.,Division of Respiratory Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Devin B Phillips
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada
| | - Denis E O'Donnell
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada
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15
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Abstract
Background: Coils and endobronchial valves are the most widely used bronchoscopic lung volume reduction devices in patients with advanced emphysema. However, the choice of each specific device depends on emphysema characteristics (homogeneous vs. heterogeneous) and presence of lobar collateral ventilation (CV). These devices have not been compared in a head-to-head study design.Objectives: To conduct a network comparative meta-analysis studying the effect of valves in patients with heterogeneous emphysema without CV, and to also study the effects of valves and coils in patients with mixed homogeneous and heterogeneous emphysema.Data Sources and Data Extraction: PubMed and Web of Science were searched for potentially includable randomized active comparator trials from inception to January 20, 2020, and data were extracted in the working sheets of Comprehensive Meta-analysis.Synthesis: Network meta-analysis was conducted in R program using package "netmeta."Results: In patients with heterogeneous emphysema without CV, both Spiration and Zephyr valves showed significant increases in forced expiratory volume in 1 second (FEV1) (0.11 L [95% confidence interval (CI), 0.05 to 0.16] and 0.14 L [0.08 to 0.19], respectively) and in reducing St. Georges Respiratory Questionnaire (SGRQ) scores (-9.32 [-14.18 to -4.45] and -8.14 [-11.94 to -4.35], respectively) as compared with control, with no significant interintervention differences. Only Zephyr valves showed significant improvement (52.3 m [95% CI, 26.53 to 77.93]) in six-minute walk distance (6MWD). Both were ranked as equally efficacious in these patients. In the mixed homogeneous and heterogeneous emphysema group of patients, both Zephyr valves and coils showed significant increases in FEV1 and 6MWD and reduction in SGRQ, as compared with control. Although there were no significant interintervention differences, the magnitude of improvement in these parameters was highest with Zephyr valves (e.g., 6MWD increased by 56.74 m [23.66 to 89.81] vs. 30.31 m [4.00 to 56.63]) in coils), ranking them first. In both populations, these interventions showed a statistically significant association with procedure-related pneumothorax but not with chronic obstructive pulmonary disease exacerbation.Conclusions: In patients with heterogeneous emphysema without CV, both Zephyr and Spiration valves were equally efficacious in FEV1 and SGRQ improvement. However, in the mixed patients with homogeneous and heterogeneous emphysema, Zephyr valves show relative superiority over coils especially with respect to improvement in 6MWD.
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16
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Abuserewa ST, Duff R, Becker G. Treatment of Idiopathic Pulmonary Fibrosis. Cureus 2021; 13:e15360. [PMID: 34239792 PMCID: PMC8245298 DOI: 10.7759/cureus.15360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2021] [Indexed: 12/03/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive, fibrosing interstitial pneumonia of unknown cause, occurring in adults and limited to the lungs. In the past, treatment was aimed at minimizing inflammation and slowing the progression of inflammation to fibrosis. However, the underlying lesion in IPF may be more fibrotic than inflammatory, explaining why few patients respond to anti-inflammatory therapies and the prognosis remains poor. In this review of literature, we will be focusing on main lines of treatment including current medications, supportive care, lung transplantation evaluation, and potential future strategies of treatment.
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Affiliation(s)
- Sherif T Abuserewa
- Internal Medicine, Grand Strand Regional Medical Center, Myrtle Beach, USA
| | - Richard Duff
- Department of Pulmonary and Critical Care Medicine, Grand Strand Medical Center, Myrtle Beach, USA
| | - Gregory Becker
- Department of Pulmonary and Critical Care Medicine, Grand Strand Medical Center, Myrtle Beach, USA
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17
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Kakavas S, Kotsiou OS, Perlikos F, Mermiri M, Mavrovounis G, Gourgoulianis K, Pantazopoulos I. Pulmonary function testing in COPD: looking beyond the curtain of FEV1. NPJ Prim Care Respir Med 2021; 31:23. [PMID: 33963190 PMCID: PMC8105397 DOI: 10.1038/s41533-021-00236-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 03/15/2021] [Indexed: 02/03/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) management remains challenging due to the high heterogeneity of clinical symptoms and the complex pathophysiological basis of the disease. Airflow limitation, diagnosed by spirometry, remains the cornerstone of the diagnosis. However, the calculation of the forced expiratory volume in the first second (FEV1) alone, has limitations in uncovering the underlying complexity of the disease. Incorporating additional pulmonary function tests (PFTs) in the everyday clinical evaluation of COPD patients, like resting volume, capacity and airway resistance measurements, diffusion capacity measurements, forced oscillation technique, field and cardiopulmonary exercise testing and muscle strength evaluation, may prove essential in tailoring medical management to meet the needs of such a heterogeneous patient population. We aimed to provide a comprehensive overview of the available PFTs, which can be incorporated into the primary care physician's practice to enhance the efficiency of COPD management.
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Affiliation(s)
- Sotirios Kakavas
- Critical Care Department, Sismanogleio General Hospital, Athens, Greece
| | - Ourania S Kotsiou
- Department of Respiratory Medicine, University of Thessaly, School of Medicine, University General Hospital of Larisa, Thessaly, Greece
| | - Fotis Perlikos
- Department of Respiratory Medicine, Evangelismos General Hospital, Athens, Greece
| | - Maria Mermiri
- Department of Emergency Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larisa, Greece.
| | - Georgios Mavrovounis
- Department of Emergency Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larisa, Greece
| | - Konstantinos Gourgoulianis
- Department of Respiratory Medicine, University of Thessaly, School of Medicine, University General Hospital of Larisa, Thessaly, Greece
| | - Ioannis Pantazopoulos
- Department of Emergency Medicine, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larisa, Greece
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18
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Zeineddine S, Rowley JA, Chowdhuri S. Oxygen Therapy in Sleep-Disordered Breathing. Chest 2021; 160:701-717. [PMID: 33610579 DOI: 10.1016/j.chest.2021.02.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 11/29/2022] Open
Abstract
Sleep-disordered breathing (SDB) is highly prevalent in adults and leads to significant cardiovascular and neurologic sequelae. Intermittent hypoxia during sleep is a direct consequence of SDB. Administration of nocturnal supplemental oxygen (NSO) has been used as a therapeutic alternative to positive airway pressure (PAP) in SDB. NSO significantly improves oxygen saturation in OSA but is inferior to PAP in terms of reducing apnea severity and may prolong the duration of obstructive apneas. The effect of NSO on daytime sleepiness remains unclear, but NSO may improve physical function-related quality of life in OSA. Its effects on BP reduction remain inconclusive. The effects of NSO vs PAP in OSA with comorbid COPD (overlap syndrome) are unknown. NSO is effective in reducing central sleep apnea related to congestive heart failure; however, its impact on mortality and cardiovascular clinical outcomes are being investigated in an ongoing clinical trial. In conclusion, studies are inconclusive or limited regarding clinical outcomes with oxygen therapy compared with sham or PAP therapy in patients with OSA and overlap syndrome. Oxygen does mitigate central sleep apnea. This review examines the crucial knowledge gaps and suggests future research priorities to clarify the effects of optimal dose and duration of NSO, alone or in combination with PAP, on cardiovascular, sleep, and cognitive outcomes.
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Affiliation(s)
- Salam Zeineddine
- Medical Service, Sleep Medicine Section, John D. Dingell Veterans Affairs Medical Center, Detroit, MI; Division of Pulmonary/Critical Care and Sleep Medicine, Department of Medicine, Wayne State University School of Medicine, Detroit, MI
| | - James A Rowley
- Division of Pulmonary/Critical Care and Sleep Medicine, Department of Medicine, Wayne State University School of Medicine, Detroit, MI
| | - Susmita Chowdhuri
- Medical Service, Sleep Medicine Section, John D. Dingell Veterans Affairs Medical Center, Detroit, MI; Division of Pulmonary/Critical Care and Sleep Medicine, Department of Medicine, Wayne State University School of Medicine, Detroit, MI.
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19
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Haidl P, Jany B, Geiseler J, Andreas S, Arzt M, Dreher M, Frey M, Hauck RW, Herth F, Hämäläinen N, Jehser T, Kenn K, Lamprecht B, Magnet F, Oldenburg O, Schenk P, Schucher B, Studnicka M, Voshaar T, Windisch W, Woehrle H, Worth H. [Guideline for Long-Term Oxygen Therapy - S2k-Guideline Published by the German Respiratory Society]. Pneumologie 2020; 74:813-841. [PMID: 33291162 DOI: 10.1055/a-1252-1492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Long-term oxygen therapy is of great importance both for reducing mortality and for improving performance in patients with chronic lung diseases. The prerequisites for Long-term oxygen therapy are adequate diagnostics and clearly defined indication. A causal distinction into chronic hypoxaemic and hypercapnic respiratory failure is reasonable, from which the differential indication for non-invasive ventilation results.The revised guideline covers the diagnostics and indication of chronic lung and heart diseases, the role of oxygen in terminal illness and gives a detailed description of available oxygen devices. The guideline is intended to help avoid undersupply, oversupply and false prescriptions. Furthermore, the chapter "Postacute Oxygen Therapy" discusses the procedure, relevant in everyday life, but not yet clearly defined, for prescribing oxygen therapy for the home at the end of an inpatient stay. Another important point, the correct prescription of mobile oxygen systems, is also presented in the guideline. This document is a revised version of the guideline for longterm oxygen therapy and replaces the version of 2008.
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Affiliation(s)
- P Haidl
- Fachkrankenhaus Kloster Grafschaft GmbH, Abteilung Pneumologie II, Schmallenberg
| | - B Jany
- Klinikum Würzburg Mitte (KWM), Klinik für Innere Medizin, Pneumologie und Beatmungsmedizin, Standort MissioKlinik, Würzburg
| | - J Geiseler
- Klinikum Vest, Medizinische Klinik IV: Pneumologie, Beatmungs- und Schlafmedizin, Marl
| | - S Andreas
- Lungenfachklinik Immenhausen, Universitätsmedizin Göttingen, Immenhausen
| | - M Arzt
- Universitätsklinikum Regensburg, Klinik und Poliklinik für Innere Medizin II, Regensburg
| | - M Dreher
- Universitätsklinikum Aachen, Klinik für Pneumologie und Internistische Intensivmedizin, Aachen
| | - M Frey
- Klinik Barmelweid, Rombach, Schweiz
| | - R W Hauck
- Klinikum Altötting, Klinik für Pneumologie, Beatmungs- und Schlafmedizin, Altötting
| | - F Herth
- Thoraxklinik, Abteilung für Pneumologie und Beatmungsmedizin, Universität Heidelberg, Heidelberg
| | | | - T Jehser
- Gemeinschaftskrankenhaus Havelhöhe, Palliativstation, Berlin
| | - K Kenn
- Philips Universität Marburg, Lehrstuhl für pneumologische Rehabilitation, Marburg
| | - B Lamprecht
- Kepler Universitätsklinikum, Med Campus III, Linz, Österreich
| | - F Magnet
- Lungenklinik, Kliniken der Stadt Köln gGmbH, Universität Witten-Herdecke, Fakultät für Gesundheit - Department für Humanmedizin, Köln
| | - O Oldenburg
- Clemenshospital, Klinik für Kardiologie, Münster
| | - P Schenk
- Landesklinikum Hochegg, Abteilung für Pulmologie, Grimmenstein, Österreich
| | - B Schucher
- LungenClinic Grosshansdorf, Großhansdorf
| | - M Studnicka
- Landeskrankenhaus Salzburg, Universitätsklinikum der PMU, Universitätsklinik für Pneumologie, Salzburg, Österreich
| | - T Voshaar
- Krankenhaus Bethanien Lungenzentrum, Medizinische Klinik III, Moers
| | - W Windisch
- Lungenklinik, Kliniken der Stadt Köln gGmbH, Universität Witten-Herdecke, Fakultät für Gesundheit - Department für Humanmedizin, Köln
| | | | - H Worth
- Facharztzentrum Fürth, Fürth
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20
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Neunhäuserer D, Reich B, Mayr B, Kaiser B, Lamprecht B, Niederseer D, Ermolao A, Studnicka M, Niebauer J. Impact of exercise training and supplemental oxygen on submaximal exercise performance in patients with COPD. Scand J Med Sci Sports 2020; 31:710-719. [PMID: 33155295 PMCID: PMC7984048 DOI: 10.1111/sms.13870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/25/2020] [Accepted: 10/27/2020] [Indexed: 12/30/2022]
Abstract
Functional impairment caused by chronic obstructive pulmonary disease (COPD) impacts on activities of daily living and quality of life. Indeed, patients' submaximal exercise capacity is of crucial importance. It was the aim of this study to investigate the effects of an exercise training intervention with and without supplemental oxygen on submaximal exercise performance. This is a secondary analysis of a randomized, controlled, double-blind, crossover trial. 29 COPD patients (63.5 ± 5.9 years; FEV1 46.4 ± 8.6%) completed two consecutive 6-week periods of high-intensity interval cycling and strength training, which was performed three times/week with either supplemental oxygen or medical air (10 L/min). Submaximal exercise capacity as well as the cardiocirculatory, ventilatory, and metabolic response were evaluated at isotime (point of termination in the shortest cardiopulmonary exercise test), at physical work capacity at 110 bpm of heart rate (PWC 110), at the anaerobic threshold (AT), and at the lactate-2 mmol/L threshold. After 12 weeks of exercise training, patients improved in exercise tolerance, shown by decreased cardiocirculatory (heart rate, blood pressure) and metabolic (respiratory exchange ratio, lactate) effort at isotime; ventilatory response was not affected. Submaximal exercise capacity was improved at PWC 110, AT and the lactate-2 mmol/L threshold, respectively. Although supplemental oxygen seems to affect patients' work rate at AT and the lactate-2 mmol/L threshold, no other significant effects were found. The improved submaximal exercise capacity and tolerance might counteract patients' functional impairment. Although cardiovascular and metabolic training adaptations were shown, ventilatory efficiency remained essentially unchanged. The impact of supplemental oxygen seems less important on submaximal training effects.
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Affiliation(s)
- Daniel Neunhäuserer
- Institute of Sports Medicine, Prevention and Rehabilitation and Research Institute for Molecular Sports Medicine and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria.,Sport and Exercise Medicine Division, Department of Medicine, University of Padova, Padova, Italy
| | - Bernhard Reich
- Institute of Sports Medicine, Prevention and Rehabilitation and Research Institute for Molecular Sports Medicine and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Barbara Mayr
- Institute of Sports Medicine, Prevention and Rehabilitation and Research Institute for Molecular Sports Medicine and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Bernhard Kaiser
- University Clinic of Pneumology, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Bernd Lamprecht
- University Clinic of Pneumology, Paracelsus Medical University Salzburg, Salzburg, Austria.,Department of Pulmonary Medicine, Faculty of Medicine, Kepler-University-Hospital, Johannes-Kepler-University, Linz, Austria
| | - David Niederseer
- Institute of Sports Medicine, Prevention and Rehabilitation and Research Institute for Molecular Sports Medicine and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria.,Division of Cardiology, University Heart Centre, University Hospital Zurich, Zurich, Switzerland
| | - Andrea Ermolao
- Sport and Exercise Medicine Division, Department of Medicine, University of Padova, Padova, Italy
| | - Michael Studnicka
- University Clinic of Pneumology, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Josef Niebauer
- Institute of Sports Medicine, Prevention and Rehabilitation and Research Institute for Molecular Sports Medicine and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
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21
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Abstract
Pulmonary rehabilitation (PR) is an essential intervention in the management of patients with chronic obstructive pulmonary disease. To guide health care professionals in the implementation and evaluation of a PR program, this article discusses the current key concepts regarding exercise testing, prescription, and training, as well as self-management intervention as essential parts of PR and post-rehabilitation maintenance. Moreover, new approaches (alternative forms of organization and delivery, tele-rehabilitation, exercise adjuncts) and unique and challenging situations (patients experiencing acute exacerbations, advanced disease) are thoroughly reviewed. Finally, validated point-of-care resources and online tools are provided.
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Affiliation(s)
- Jean Bourbeau
- Respiratory Epidemiology and Clinical Research Unit, Montréal Chest Institute, McGill University Health Centre, 5252 De Maisonneuve, Room 3D.62, Montréal, Québec H4A 3S5, Canada.
| | - Sebastien Gagnon
- Respiratory Epidemiology and Clinical Research Unit, Montréal Chest Institute, McGill University Health Centre, 5252 De Maisonneuve, Room 3D.62, Montréal, Québec H4A 3S5, Canada
| | - Bryan Ross
- Respiratory Epidemiology and Clinical Research Unit, Montréal Chest Institute, McGill University Health Centre, 5252 De Maisonneuve, Room 3D.62, Montréal, Québec H4A 3S5, Canada
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22
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Freitag N, Doma K, Neunhaeuserer D, Cheng S, Bloch W, Schumann M. Is Structured Exercise Performed with Supplemental Oxygen a Promising Method of Personalized Medicine in the Therapy of Chronic Diseases? J Pers Med 2020; 10:jpm10030135. [PMID: 32961816 PMCID: PMC7564446 DOI: 10.3390/jpm10030135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/09/2020] [Accepted: 09/17/2020] [Indexed: 12/22/2022] Open
Abstract
Aim: This systematic review aimed to explore the literature to identify in which types of chronic diseases exercise with supplemental oxygen has previously been utilized and whether this type of personalized therapy leads to superior effects in physical fitness and well-being. Methods: Databases (PubMed/MEDLINE, CINHAL, EMBASE, Web of knowledge and Cochrane Library) were searched in accordance with PRISMA. Eligibility criteria included adult patients diagnosed with any type of chronic diseases engaging in supervised exercise training with supplemental oxygen compared to normoxia. A random-effects model was used to pool effect sizes by standardized mean differences (SMD). Results: Out of the identified 4038 studies, 12 articles were eligible. Eleven studies were conducted in chronic obstructive pulmonary disease (COPD), while one study included coronary artery disease (CAD) patients. No statistical differences were observed for markers of physical fitness and patient-reported outcomes on well-being between the two training conditions (SMD −0.10; 95% CI −0.27, 0.08; p = 0.26). Conclusions: We found that chronic exercise with supplemental oxygen has mainly been utilized for COPD patients. Moreover, no superior long-term adaptations on physical fitness, functional capacity or patient-reported well-being were found, questioning the role of this method as a personalized medicine approach. Prospero registration: CRD42018104649.
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Affiliation(s)
- Nils Freitag
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany; (N.F.); (W.B.)
| | - Kenji Doma
- Sport and Exercise Science, College of Healthcare Sciences, James Cook University, Townsville, QLD 4811, Australia;
| | - Daniel Neunhaeuserer
- Sport and Exercise Medicine Division, Department of Medicine, University of Padova, 35128 Padova, Italy;
| | - Sulin Cheng
- Department of Physical Education, Exercise, Health and Technology Centre, Shanghai Jiao Tong University, Shanghai 200240, China;
- Faculty of Sport and Health Sciences, University of Jyväskylä, 40014 Jyväskylä, Finland
- The Exercise Translational Medicine Centre, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany; (N.F.); (W.B.)
| | - Moritz Schumann
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany; (N.F.); (W.B.)
- Department of Physical Education, Exercise, Health and Technology Centre, Shanghai Jiao Tong University, Shanghai 200240, China;
- The Exercise Translational Medicine Centre, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
- Correspondence: ; Tel.: +49-221-4982-4821; Fax: +49-221-4982-8370
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23
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Milne KM, Domnik NJ, Phillips DB, James MD, Vincent SG, Neder JA, O'Donnell DE. Evaluation of Dynamic Respiratory Mechanical Abnormalities During Conventional CPET. Front Med (Lausanne) 2020; 7:548. [PMID: 33072774 PMCID: PMC7533639 DOI: 10.3389/fmed.2020.00548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 07/31/2020] [Indexed: 12/21/2022] Open
Abstract
Assessment of the ventilatory response to exercise is important in evaluating mechanisms of dyspnea and exercise intolerance in chronic cardiopulmonary diseases. The characteristic mechanical derangements that occur during exercise in chronic respiratory conditions have previously been determined in seminal studies using esophageal catheter pressure-derived measurements. In this brief review, we examine the emerging role and clinical utility of conventional assessment of dynamic respiratory mechanics during exercise testing. Thus, we provide a physiologic rationale for measuring operating lung volumes, breathing pattern, and flow-volume loops during exercise. We consider standardization of inspiratory capacity-derived measurements and their practical implementation in clinical laboratories. We examine the evidence that this iterative approach allows greater refinement in evaluation of ventilatory limitation during exercise than traditional assessments of breathing reserve. We appraise the available data on the reproducibility and responsiveness of this methodology. In particular, we review inspiratory capacity measurement and derived operating lung volumes during exercise. We demonstrate, using recent published data, how systematic evaluation of dynamic mechanical constraints, together with breathing pattern analysis, can provide valuable insights into the nature and extent of physiological impairment contributing to exercise intolerance in individuals with common chronic obstructive and restrictive respiratory disorders.
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Affiliation(s)
- Kathryn M Milne
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada.,Clinician Investigator Program, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Nicolle J Domnik
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
| | - Devin B Phillips
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
| | - Matthew D James
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
| | - Sandra G Vincent
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
| | - J Alberto Neder
- Laboratory of Clinical Exercise Physiology, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
| | - Denis E O'Donnell
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre & Queen's University, Kingston, ON, Canada
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24
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Dilektasli AG, Porszasz J, Stringer WW, Casaburi R. Physiologic Effects of Oxygen Supplementation During Exercise in Chronic Obstructive Pulmonary Disease. Clin Chest Med 2020; 40:385-395. [PMID: 31078216 DOI: 10.1016/j.ccm.2019.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Supplemental long-term oxygen therapy (LTOT) is a well-established therapy that improves mortality in patients with chronic obstructive pulmonary disease (COPD) with resting hypoxemia. In the large number of patients with COPD who do not have severe resting hypoxemia but who desaturate with exercise, the clinical benefits that can be obtained by supplemental O2 therapy during exercise is an area of interest and active research. A summary of current evidence for benefits of supplemental O2 therapy and a review of physiologic mechanisms underlying published observations are reviewed in this article.
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Affiliation(s)
- Asli Gorek Dilektasli
- Rehabilitation Clinical Trials Center, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, 1124 W. Carson Street, Building CDCRC, Torrance, CA 90502, USA; Faculty of Medicine, Department of Pulmonary Medicine, Uludağ University, Turkey
| | - Janos Porszasz
- Rehabilitation Clinical Trials Center, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, 1124 W. Carson Street, Building CDCRC, Torrance, CA 90502, USA
| | - William W Stringer
- Rehabilitation Clinical Trials Center, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, 1124 W. Carson Street, Building CDCRC, Torrance, CA 90502, USA
| | - Richard Casaburi
- Rehabilitation Clinical Trials Center, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, 1124 W. Carson Street, Building CDCRC, Torrance, CA 90502, USA.
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25
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Hasler ED, Saxer S, Schneider SR, Furian M, Lichtblau M, Schwarz EI, Bloch KE, Ulrich S. Effect of Breathing Oxygen-Enriched Air on Exercise Performance in Patients with Chronic Obstructive Pulmonary Disease: Randomized, Placebo-Controlled, Cross-Over Trial. Respiration 2020; 99:213-224. [PMID: 32050198 DOI: 10.1159/000505819] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 01/06/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Patients with chronic obstructive pulmonary disease (COPD) experience dyspnea and hypoxemia during exercise. OBJECTIVE The aim of this study was to evaluate the effects of breathing oxygen-enriched air on exercise performance and associated physiological changes in patients with COPD. METHODS In a randomized, placebo-controlled, single-blind, cross-over trial, 20 patients with COPD (11 women, age 65 ± 6 years, FEV1 64 ± 19% pred., resting SpO2 ≥90%) performed 4 cycle ergospirometries to exhaustion using an incremental exercise test (IET) and a constant work rate (at 75% maximal workload with air) exercise test (CWRET), each with ambient (FiO2 0.21) and oxygen-enriched (FiO2 0.5) air. The main outcomes were the change in maximal workload in the IET and the change in exercise duration in the CWRET with oxygen versus air. Electrocardiogram, pulmonary gas exchange, thoracic volumes by inductance plethysmography, arterial blood gases, and cerebral and quadriceps muscle tissue oxygenation (CTO and MTO) were additionally measured. RESULTS In the IET, maximal workload increased from 96 ± 21 to 104 ± 28 W with oxygen. In the CWRET, exercise duration increased from 605 ± 274 to 963 ± 444 s with oxygen. At end-exercise with oxygen, CTO, MTO, PaO2, and PaCO2 were increased, while V'E/V'CO2 was reduced and thoracic volumes were similar. At the corresponding time to end of exercise with ambient air, oxygen decreased heart rate, respiratory rate, minute ventilation, and V'E/V'CO2, while oxygenation was increased. CONCLUSION In COPD patients without resting hypoxemia, breathing oxygen-enriched air improves exercise performance. This relates to a higher arterial oxygen saturation promoting oxygen availability to muscle and cerebral tissue and an enhanced ventilatory efficiency. COPD patients may benefit from oxygen therapy during exercise training.
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Affiliation(s)
| | - Stéphanie Saxer
- Pulmonary Clinic, University Hospital Zurich, Zurich, Switzerland
| | | | - Michael Furian
- Pulmonary Clinic, University Hospital Zurich, Zurich, Switzerland
| | - Mona Lichtblau
- Pulmonary Clinic, University Hospital Zurich, Zurich, Switzerland
| | | | - Konrad E Bloch
- Pulmonary Clinic, University Hospital Zurich and Centre for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Silvia Ulrich
- Pulmonary Clinic, University Hospital Zurich and Centre for Integrative Human Physiology, University of Zurich, Zurich, Switzerland,
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26
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O'Donnell DE, Milne KM, James MD, de Torres JP, Neder JA. Dyspnea in COPD: New Mechanistic Insights and Management Implications. Adv Ther 2020; 37:41-60. [PMID: 31673990 PMCID: PMC6979461 DOI: 10.1007/s12325-019-01128-9] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Indexed: 12/29/2022]
Abstract
Dyspnea is the most common symptom experienced by patients with chronic obstructive pulmonary disease (COPD). To avoid exertional dyspnea, many patients adopt a sedentary lifestyle which predictably leads to extensive skeletal muscle deconditioning, social isolation, and its negative psychological sequalae. This "dyspnea spiral" is well documented and it is no surprise that alleviation of this distressing symptom has become a key objective highlighted across COPD guidelines. In reality, this important goal is often difficult to achieve, and successful symptom management awaits a clearer understanding of the underlying mechanisms of dyspnea and how these can be therapeutically manipulated for the patients' benefit. Current theoretical constructs of the origins of activity-related dyspnea generally endorse the classical demand-capacity imbalance theory. Thus, it is believed that disruption of the normally harmonious relationship between inspiratory neural drive (IND) to breathe and the simultaneous dynamic response of the respiratory system fundamentally shapes the expression of respiratory discomfort in COPD. Sadly, the symptom of dyspnea cannot be eliminated in patients with advanced COPD with relatively fixed pathophysiological impairment. However, there is evidence that effective symptom palliation is possible for many. Interventions that reduce IND, without compromising alveolar ventilation (VA), or that improve respiratory mechanics and muscle function, or that address the affective dimension, achieve measurable benefits. A common final pathway of dyspnea relief and improved exercise tolerance across the range of therapeutic interventions (bronchodilators, exercise training, ambulatory oxygen, inspiratory muscle training, and opiate medications) is reduced neuromechanical dissociation of the respiratory system. These interventions, singly and in combination, partially restore more harmonious matching of excessive IND to ventilatory output achieved. In this review we propose, on the basis of a thorough review of the recent literature, that effective dyspnea amelioration requires combined interventions and a structured multidisciplinary approach, carefully tailored to meet the specific needs of the individual.
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Affiliation(s)
- Denis E O'Donnell
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, ON, Canada.
| | - Kathryn M Milne
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, ON, Canada
- Clinician Investigator Program, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Matthew D James
- Respiratory Investigation Unit, Division of Respirology, Department of Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, ON, Canada
| | - Juan Pablo de Torres
- Division of Respirology, Department of Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, ON, Canada
| | - J Alberto Neder
- Division of Respirology, Department of Medicine, Kingston Health Sciences Centre and Queen's University, Kingston, ON, Canada
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27
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Koczulla AR, Schneeberger T, Jarosch I, Kenn K, Gloeckl R. Long-Term Oxygen Therapy. DEUTSCHES ARZTEBLATT INTERNATIONAL 2019; 115:871-877. [PMID: 30765024 DOI: 10.3238/arztebl.2018.0871] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 05/04/2018] [Accepted: 09/19/2018] [Indexed: 11/27/2022]
Abstract
BACKGROUND Long-term oxygen therapy (LTOT) is an established treatment for patients with chronic hypoxemia. Its scientific basis is derived mainly from two trials from the early 1980s that showed a survival advantage for patients with chronic obstructive pulmonary disease (COPD) treated with LTOT. Robust data are not available for other diseases associated with hypoxemia. METHODS This review is based on pertinent publications retrieved by a selective search in PubMed. RESULTS The use of LTOT for 15 to 16 hours per day (or, better, 24 hours per day) is recommended in current guidelines for patients with chronic hypoxemia (PaO2 ≤ 55 mm Hg) because this treatment was found to be associated with a lower mortality rate compared to no LTOT (33% vs. 55%, p <0.05) based on data from the early 1980s. In the short term, oxygen administration to a hypoxemic patient can improve oxygen saturation by nine percentage points and improve physical performance to a clinically relevant extent (6-minute walking test: + 37 m, p <0.001). The available data do not support the use of LTOT for normoxemic patients. LTOT should only be administered for strict indications, in accordance with the guidelines, and only in a form suitable for the individual patient. Skin burns can occur as a side effect of LTOT because of contact explosions with any type of fire. CONCLUSION The acquisition of further robust data would be desirable, particularly with respect to patient-relevant outcome parameters including quality of life, performance status, and mortality. Moreover, the German guidelines on oxygen therapy need to be updated.
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Affiliation(s)
- Andreas Rembert Koczulla
- Institute for Pulmonary Rehabilitation Research, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee; Philipps University Marburg (Schoenau site), German Center for Lung Research (DZL), Marburg; Department for Prevention, Rehabilitation, and Sports Medicine, Technical University Munich (TUM), Munich, Germany
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28
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Louvaris Z, Vogiatzis I. Contrasting the physiological effects of heliox and oxygen during exercise in a patient with advanced COPD. Breathe (Sheff) 2019; 15:250-257. [PMID: 31508165 PMCID: PMC6717618 DOI: 10.1183/20734735.0197-2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
In COPD patients the ergogenic effect of heliox or oxygen breathing might be related both to improvements in ventilatory parameters (that lessen dyspnoea) and to enhanced oxygen delivery to respiratory and locomotor muscles http://bit.ly/2JlJBTc.
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Affiliation(s)
- Zafeiris Louvaris
- Faculty of Movement and Rehabilitation Sciences, Division of Respiratory Rehabilitation, Dept Rehabilitation Sciences KU Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Ioannis Vogiatzis
- Dept of Sport, Exercise and Rehabilitation, Faculty of Health and Life Sciences, Northumbria University Newcastle, Newcastle, UK
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29
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Patel MS, McKie E, Steiner MC, Pascoe SJ, Polkey MI. Anaemia and iron dysregulation: untapped therapeutic targets in chronic lung disease? BMJ Open Respir Res 2019; 6:e000454. [PMID: 31548896 PMCID: PMC6733331 DOI: 10.1136/bmjresp-2019-000454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 12/13/2022] Open
Abstract
Hypoxia is common in many chronic lung diseases. Beyond pulmonary considerations, delivery of oxygen (O2) to the tissues and subsequent O2 utilisation is also determined by other factors including red blood cell mass and iron status; consequently, disruption to these mechanisms provides further physiological strains on an already stressed system. O2 availability influences ventilation, regulates pulmonary blood flow and impacts gene expression throughout the body. Deleterious effects of poor tissue oxygenation include decreased exercise tolerance, increased cardiac strain and pulmonary hypertension in addition to pathophysiological involvement of multiple other organs resulting in progressive frailty. Increasing inspired O2 is expensive, disliked by patients and does not normalise tissue oxygenation; thus, other strategies that improve O2 delivery and utilisation may provide novel therapeutic opportunities in patients with lung disease. In this review, we focus on the rationale and possibilities for doing this by increasing haemoglobin availability or improving iron regulation.
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Affiliation(s)
| | | | - Michael C Steiner
- Leicester Biomedical Research Centre - Respiratory, Institute for Lung Health, University of Leicester, Leicester, UK
| | | | - Michael I Polkey
- National Heart and Lung Institute, Imperial College London, London, UK
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30
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O’Donnell DE, James MD, Milne KM, Neder JA. The Pathophysiology of Dyspnea and Exercise Intolerance in Chronic Obstructive Pulmonary Disease. Clin Chest Med 2019; 40:343-366. [DOI: 10.1016/j.ccm.2019.02.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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31
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Walsh JA, Maddocks M, Man WDC. Supplemental oxygen during exercise training in COPD: full of hot air? Eur Respir J 2019; 53:53/5/1900837. [PMID: 31147425 DOI: 10.1183/13993003.00837-2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 05/06/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Jessica A Walsh
- Harefield Respiratory Research Group, Royal Brompton and Harefield NHS Foundation Trust, Uxbridge, UK
| | - Matthew Maddocks
- Cicely Saunders Institute of Palliative Care, Policy and Rehabilitation, King's College London, London, UK
| | - William D-C Man
- Harefield Respiratory Research Group, Royal Brompton and Harefield NHS Foundation Trust, Uxbridge, UK.,National Heart and Lung Institute, Imperial College London, London, UK
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32
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Maddocks M, Reilly CC, Jolley C, Higginson IJ. What Next in Refractory Breathlessness? Breathlessness? Research Questions for Palliative Care. J Palliat Care 2018. [DOI: 10.1177/082585971403000405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Matthew Maddocks
- Department of Palliative Care, Policy and Rehabilitation, Cicely Saunders Institute, King's College London, London, SE5 9PJ, UK
| | - Charles C. Reilly
- King's College Hospital NHS Foundation Trust, London, UK; Department of Respiratory Medicine, King's College London, London, UK; Department of Palliative Care, Policy and Rehabilitation, Cicely Saunders Institute, King's College London, London, UK
| | - Caroline Jolley
- King's College Hospital NHS Foundation Trust, London, UK; Department of Respiratory Medicine, King's College London, London, UK; Department of Palliative Care, Policy and Rehabilitation, Cicely Saunders Institute, King's College London, London, UK
| | - Irene J. Higginson
- King's College Hospital NHS Foundation Trust, London, UK; Department of Respiratory Medicine, King's College London, London, UK; Department of Palliative Care, Policy and Rehabilitation, Cicely Saunders Institute, King's College London, London, UK
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33
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Van Der Molen MC, Klooster K, Hartman JE, Slebos DJ. Lung volume reduction with endobronchial valves in patients with emphysema. Expert Rev Med Devices 2018; 15:847-857. [DOI: 10.1080/17434440.2018.1538780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Marieke C. Van Der Molen
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Karin Klooster
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jorine E. Hartman
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Dirk-Jan Slebos
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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34
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Sadaka AS, Montgomery AJ, Mourad SM, Polkey MI, Hopkinson NS. Exercise response to oxygen supplementation is not associated with survival in hypoxemic patients with obstructive lung disease. Int J Chron Obstruct Pulmon Dis 2018; 13:1607-1612. [PMID: 29844666 PMCID: PMC5963480 DOI: 10.2147/copd.s163119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose Hypoxemia is associated with more severe lung disease and worse outcomes. In some patients with chronic obstructive lung diseases who desaturate on exertion, supplemental oxygen improves exercise capacity. The clinical significance of this exercise response to oxygen supplementation is not known. Patients and methods We identified chronic obstructive lung disease patients at our center who underwent a 6-minute walking test (6MWT) for ambulatory oxygen assessment and who desaturated breathing air and therefore had an additional walk test on supplemental oxygen, between August 2006 and June 2016. Responders were defined as walking ≥26 m further with oxygen. Survival was determined up to February 1, 2017. We compared survival in oxygen responders and nonresponders in patients with obstructive lung diseases. Results One hundred and seventy-four patients were included in the study, median age 70 years. Seventy-seven (44.3%) of the patients were oxygen responders. Borg dyspnea score improved by 1.4 (±1.4) units (P<0.0005) on oxygen. Median survival was 66 months with death occurring in 84 (48.2%) patients. Kaplan–Meier analysis revealed no survival difference between both responders and nonresponders (P=0.571). Cox regression analysis showed that more 6MWT desaturation, lower 6-minute walking distance on room air, male gender, lower hemoglobin, and body mass index were associated with higher mortality risk. Conclusion Acute exercise response to supplemental oxygen is not associated with long-term survival in patients with obstructive lung disease. This supports the use of ambulatory oxygen treatment for symptomatic purposes only.
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Affiliation(s)
- Ahmed S Sadaka
- NIHR Respiratory Biomedical Research Unit at the Royal Brompton Hospital and Imperial College, Respiratory Medicine, London, UK.,Alexandria University Faculty of Medicine, Chest Department, Alexandria, Egypt
| | | | - Sahar M Mourad
- Alexandria University Faculty of Medicine, Chest Department, Alexandria, Egypt
| | - Michael I Polkey
- NIHR Respiratory Biomedical Research Unit at the Royal Brompton Hospital and Imperial College, Respiratory Medicine, London, UK
| | - Nicholas S Hopkinson
- NIHR Respiratory Biomedical Research Unit at the Royal Brompton Hospital and Imperial College, Respiratory Medicine, London, UK
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35
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Abstract
Cardiopulmonary exercise testing (CPET) in hyperoxia and hypoxia has several applications, stemming from characterization of abnormal physiological response profiles associated with exercise intolerance. As altered oxygenation can impact the performance of gas-concentration and flow sensors and pulmonary gas exchange algorithms, integrated CPET system function requires validation under these conditions. Also, as oxygenation status can influence peak [Formula: see text]o2, care should be taken in the selection of work-rate incrementation rates when CPET performance is to be compared with normobaria at sea level. CPET has been used to evaluate the effects of supplemental O2 on exercise intolerance in chronic obstructive pulmonary disease, interstitial pulmonary fibrosis, and cystic fibrosis at sea level. However, identification of those CPET indices likely to be predictive of supplemental O2 outcomes for exercise tolerance at altitude in such patients is lacking. CPET performance with supplemental O2 in respiratory patients residing at high altitudes is also poorly studied. Finally, CPET has the potential to give physiological and clinical information about acute and chronic mountain sickness, high-altitude pulmonary edema, and high-altitude cerebral edema. It may also translate high-altitude acclimatization and adaptive processes in healthy individuals into intensive care medical practice.
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36
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Brugniaux JV, Coombs GB, Barak OF, Dujic Z, Sekhon MS, Ainslie PN. Highs and lows of hyperoxia: physiological, performance, and clinical aspects. Am J Physiol Regul Integr Comp Physiol 2018; 315:R1-R27. [PMID: 29488785 DOI: 10.1152/ajpregu.00165.2017] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Molecular oxygen (O2) is a vital element in human survival and plays a major role in a diverse range of biological and physiological processes. Although normobaric hyperoxia can increase arterial oxygen content ([Formula: see text]), it also causes vasoconstriction and hence reduces O2 delivery in various vascular beds, including the heart, skeletal muscle, and brain. Thus, a seemingly paradoxical situation exists in which the administration of oxygen may place tissues at increased risk of hypoxic stress. Nevertheless, with various degrees of effectiveness, and not without consequences, supplemental oxygen is used clinically in an attempt to correct tissue hypoxia (e.g., brain ischemia, traumatic brain injury, carbon monoxide poisoning, etc.) and chronic hypoxemia (e.g., severe COPD, etc.) and to help with wound healing, necrosis, or reperfusion injuries (e.g., compromised grafts). Hyperoxia has also been used liberally by athletes in a belief that it offers performance-enhancing benefits; such benefits also extend to hypoxemic patients both at rest and during rehabilitation. This review aims to provide a comprehensive overview of the effects of hyperoxia in humans from the "bench to bedside." The first section will focus on the basic physiological principles of partial pressure of arterial O2, [Formula: see text], and barometric pressure and how these changes lead to variation in regional O2 delivery. This review provides an overview of the evidence for and against the use of hyperoxia as an aid to enhance physical performance. The final section addresses pathophysiological concepts, clinical studies, and implications for therapy. The potential of O2 toxicity and future research directions are also considered.
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Affiliation(s)
| | - Geoff B Coombs
- Centre for Heart, Lung, and Vascular Health, University of British Columbia , Kelowna, British Columbia , Canada
| | - Otto F Barak
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia.,Faculty of Sport and Physical Education, University of Novi Sad, Novi Sad, Serbia
| | - Zeljko Dujic
- Department of Integrative Physiology, School of Medicine, University of Split , Split , Croatia
| | - Mypinder S Sekhon
- Centre for Heart, Lung, and Vascular Health, University of British Columbia , Kelowna, British Columbia , Canada.,Division of Critical Care Medicine, Department of Medicine, Vancouver General Hospital, University of British Columbia , Vancouver, British Columbia , Canada
| | - Philip N Ainslie
- Centre for Heart, Lung, and Vascular Health, University of British Columbia , Kelowna, British Columbia , Canada
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37
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Degani-Costa LH, O'Donnell DE, Webb K, Aranda LC, Carlstron JP, Cesar TDS, Plachi F, Berton DC, Neder JA, Nery LE. A Simplified Approach to Select Exercise Endurance Intensity for Interventional Studies in COPD. COPD 2018; 15:139-147. [PMID: 29485343 DOI: 10.1080/15412555.2018.1428944] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Time to exercise limitation (Tlim) in response to constant work rate (CWR) is sensitive to interventions in chronic obstructive pulmonary disease (COPD). This is particularly true when the pre-intervention test lasts between 3 and 8 min (Tlim3'-8'). There is, however, no simple method to select a work rate which is consistently associated with Tlim3'-8' across the spectrum of COPD severity. We assessed 59 GOLD stages II-IV patients who initially cycled to Tlim at 75% peak. In case of short (<3 min, low-endurance) or long (>8 min, high-endurance) tests, patients exercised after 60 min at 50% or 90%, respectively (CWR50%⇐75%⇒90%). Critical mechanical constraints and limiting dyspnea at 75% were reached within the desired timeframe in 27 "mid-endurance" patients (46%). Increasing work rate intensity to 90% hastened the mechanical-ventilatory responses leading to Tlim3'-8' in 23/26 (88%) "high-endurance" patients; conversely, decreasing exercise intensity to 50% slowed those responses leading to Tlim3'-8' in 5/6 (83%) "high-endurance" patients. Repeating the tests at higher (60%) or lower (80%) intensities fail to consistently produce Tlim3'-8' in "low-" and "high-endurance", respectively (p > 0.05). Compared to a fixed work rate at 75%, CWR50%⇐75%⇒90% significantly decreased Tlim's coefficient of variation; consequently, the required N to detect 100 s or 33% improvement in Tlim decreased from 82 to 26 and 41 to 14, respectively. This simplified approach to individualized work rate adjustment (CWR50%⇐75%⇒90%) might allow greater sensitivity in evaluating interventional efficacy in improving respiratory mechanics and exercise tolerance while simultaneously reducing sample size requirements in patients with COPD.
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Affiliation(s)
- Luiza H Degani-Costa
- a Respiratory Division, Department of Medicine, Sao Paulo School of Medicine , Federal University of Sao Paulo , Sao Paulo , SP , Brazil
| | - Denis E O'Donnell
- b Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine , Queen's University , Kingston , ON , Canada
| | - Katherine Webb
- b Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine , Queen's University , Kingston , ON , Canada
| | - Liliane C Aranda
- a Respiratory Division, Department of Medicine, Sao Paulo School of Medicine , Federal University of Sao Paulo , Sao Paulo , SP , Brazil
| | - Júlio P Carlstron
- a Respiratory Division, Department of Medicine, Sao Paulo School of Medicine , Federal University of Sao Paulo , Sao Paulo , SP , Brazil
| | - Tamires da Silva Cesar
- a Respiratory Division, Department of Medicine, Sao Paulo School of Medicine , Federal University of Sao Paulo , Sao Paulo , SP , Brazil
| | - Franciele Plachi
- c Division of Respirology , Federal University of Rio Grande do Sul , Porto Alegre , Brazil
| | - Danilo C Berton
- b Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine , Queen's University , Kingston , ON , Canada.,c Division of Respirology , Federal University of Rio Grande do Sul , Porto Alegre , Brazil
| | - J Alberto Neder
- b Respiratory Investigation Unit, Division of Respiratory and Critical Care Medicine, Department of Medicine , Queen's University , Kingston , ON , Canada
| | - Luiz E Nery
- a Respiratory Division, Department of Medicine, Sao Paulo School of Medicine , Federal University of Sao Paulo , Sao Paulo , SP , Brazil
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High Oxygen Delivery to Preserve Exercise Capacity in Patients with Idiopathic Pulmonary Fibrosis Treated with Nintedanib. Methodology of the HOPE-IPF Study. Ann Am Thorac Soc 2018; 13:1640-7. [PMID: 27348402 DOI: 10.1513/annalsats.201604-267oc] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
RATIONALE Pulmonary rehabilitation improves dyspnea and exercise capacity in idiopathic pulmonary fibrosis (IPF); however, it is unknown whether breathing high amounts of oxygen during exercise training leads to further benefits. OBJECTIVES Herein, we describe the design of the High Oxygen Delivery to Preserve Exercise Capacity in IPF Patients Treated with Nintedanib study (the HOPE-IPF study). The primary objective of this study is to determine the physiological and perceptual impact of breathing high levels of oxygen during exercise training in patients with IPF who are receiving antifibrotic therapy. METHODS HOPE-IPF is a two-arm double-blind multicenter randomized placebo-controlled trial of 88 patients with IPF treated with nintedanib. Patients will undergo 8 weeks of three times weekly aerobic cycle exercise training, breathing a hyperoxic gas mixture with a constant fraction of 60% inhaled oxygen, or breathing up to 40% oxygen as required to maintain an oxygen saturation level of at least 88%. MEASUREMENTS AND MAIN RESULTS End points will be assessed at baseline, postintervention (Week 8), and follow-up (Week 26). The primary analysis will compare the between-group baseline with post-training change in endurance time during constant work rate cycle exercise tests. Additional analyses will evaluate the impact of training with high oxygen delivery on 6-minute walk distance, dyspnea, physical activity, and quality of life. CONCLUSIONS The HOPE-IPF study will lead to a comprehensive understanding of IPF exercise physiology, with the potential to change clinical practice by indicating the need for increased delivery of supplemental oxygen during pulmonary rehabilitation in patients with IPF. Clinical trial registered with www.clinicaltrials.gov (NCT02551068).
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Supplemental oxygen in patients with stable chronic obstructive pulmonary disease: evidence from Nocturnal Oxygen Treatment Trial to Long-term Oxygen Treatment Trial. Curr Opin Pulm Med 2018; 24:179-186. [PMID: 29319542 DOI: 10.1097/mcp.0000000000000461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Oxygen therapy was the first treatment shown to prolong life in patients with chronic obstructive pulmonary disease (COPD) and has been joined by lung volume reduction surgery in selected patients with emphysema, smoking cessation, and potentially noninvasive ventilation in chronic hypercapneic respiratory failure. Although there is consensus around the survival-enhancing effect of supplemental oxygen (SupplO2) for patients with chronic severe hypoxemia at rest, the impact of SupplO2 for COPD patients with moderate hypoxemia and exertional desaturation had been less clear. RECENT FINDINGS The recently published Long-term Oxygen Treatment Trial (LOTT) showed no benefit of SupplO2 for the composite outcome of survival and all-cause hospitalizations, or for component outcomes, severe COPD exacerbations, or quality of life in COPD patients with moderate resting hypoxemia or room air normoxemia with exercise desaturation. SUMMARY Results of the LOTT challenge the practice of prescribing SupplO2 for patients with COPD and moderate resting hypoxemia or isolated exertional desaturation. In the context that LOTT may not have recruited patients for whom SupplO2 conferred subjective benefit, there may be a role for short-term trials of SupplO2 with assessment of subjective benefit in such patients.
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Criner G. More Options for Treating Severe Hyperinflation in Advanced Emphysema. Am J Respir Crit Care Med 2017; 196:1496-1498. [DOI: 10.1164/rccm.201709-1799ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Gerard Criner
- Temple University School of MedicinePhiladelphia, Pennsylvania
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Role of Breathing Conditions During Exercise Testing on Training Prescription in Chronic Obstructive Pulmonary Disease. Am J Phys Med Rehabil 2017. [PMID: 28644243 DOI: 10.1097/phm.0000000000000775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This study investigated whether different breathing conditions during exercise testing will influence measures of exercise capacity commonly used for training prescription in chronic obstructive pulmonary disease. Twenty-seven patients with chronic obstructive pulmonary disease (forced expiratory volume in 1 sec = 45.6 [9.4]%) performed three maximal exercise tests within 8 days, but at least 48 hrs apart. Subjects were thereby breathing either room air through a tightly fitting face mask like during any cardiopulmonary exercise test (MASK), room air without mask (No-MASK), or 10 l/min of oxygen via nasal cannula (No-MASK + O2). Cycling protocols were identical for all tests (start = 20 watts, increment = 10 males/5 females watts/min). Maximal work rate (90.4 [33.8], 100.3 [34.8], 107.4 [35.9] watts, P < 0.001) and blood lactate at exhaustion (4.3 [1.5], 5.2 [1.6], 5.0 [1.4] mmol/l, P < 0.001) were lowest for MASK when compared with No-MASK and No-MASK + O2, respectively, whereas maximal heart rate did not differ significantly. Submaximal exertion (Borg rating of perceived exertion = 12-14) was perceived at lower intensity (P = 0.008), but higher heart rate (P = 0.005) when MASK was compared with No-MASK and No-MASK + O2. Different breathing conditions during exercise testing resulted in an 18.8% difference in maximal work rate, likely causing underdosing or overdosing of exercise in chronic obstructive pulmonary disease. Face masks reduced whereas supplemental oxygen increased patients' exercise capacity. For accurate prescription of exercise in chronic obstructive pulmonary disease, breathing conditions during testing should closely match training conditions.
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Abstract
Chronic respiratory failure due to chronic obstructive pulmonary disease (COPD) is an increasing problem worldwide. Many patients with severe COPD develop hypoxemic respiratory failure during the natural progression of disease. Long-term oxygen therapy (LTOT) is a well-established supportive treatment for COPD and has been shown to improve survival in patients who develop chronic hypoxemic respiratory failure. The degree of hypoxemia is severe when partial pressure of oxygen in arterial blood (PaO2) is ≤55 mmHg and moderate if PaO2 is between 56 and 69 mmHg. Although current guidelines consider LTOT only in patients with severe resting hypoxemia, many COPD patients with moderate to severe disease experience moderate hypoxemia at rest or during special circumstances, such as while sleeping or exercising. The efficacy of LTOT in these patients who do not meet the actual recommendations is still a matter of debate, and extensive research is still ongoing to understand the possible benefits of LTOT for survival and/or functional outcomes such as the sensation of dyspnea, exacerbation frequency, hospitalizations, exercise capacity, and quality of life. Despite its frequent use, the administration of "palliative" oxygen does not seem to improve dyspnea except for delivery with high-flow humidified oxygen. This narrative review will focus on current evidence for the effects of LTOT in the presence of moderate hypoxemia at rest, during sleep, or during exercise in COPD.
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Affiliation(s)
- Begum Ergan
- a Department of Pulmonary and Critical Care, Faculty of Medicine , Dokuz Eylul University , Izmir , Turkey
| | - Stefano Nava
- b Department of Clinical, Integrated and Experimental Medicine (DIMES), Respiratory and Critical Care Unit, S. Orsola-Malpighi Hospital , Alma Mater University , Bologna , Italy
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van Empel V, Knackstedt C, van Paassen P, Brunner-La Rocca HP. Just air good enough in pulmonary hypertension? Eur Heart J 2017; 38:1169-1171. [DOI: 10.1093/eurheartj/ehx117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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O'Donnell DE, Elbehairy AF, Faisal A, Webb KA, Neder JA, Mahler DA. Exertional dyspnoea in COPD: the clinical utility of cardiopulmonary exercise testing. Eur Respir Rev 2017; 25:333-47. [PMID: 27581832 DOI: 10.1183/16000617.0054-2016] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 07/01/2016] [Indexed: 02/03/2023] Open
Abstract
Activity-related dyspnoea is often the most distressing symptom experienced by patients with chronic obstructive pulmonary disease (COPD) and can persist despite comprehensive medical management. It is now clear that dyspnoea during physical activity occurs across the spectrum of disease severity, even in those with mild airway obstruction. Our understanding of the nature and source of dyspnoea is incomplete, but current aetiological concepts emphasise the importance of increased central neural drive to breathe in the setting of a reduced ability of the respiratory system to appropriately respond. Since dyspnoea is provoked or aggravated by physical activity, its concurrent measurement during standardised laboratory exercise testing is clearly important. Combining measurement of perceptual and physiological responses during exercise can provide valuable insights into symptom severity and its pathophysiological underpinnings. This review summarises the abnormal physiological responses to exercise in COPD, as these form the basis for modern constructs of the neurobiology of exertional dyspnoea. The main objectives are: 1) to examine the role of cardiopulmonary exercise testing (CPET) in uncovering the physiological mechanisms of exertional dyspnoea in patients with mild-to-moderate COPD; 2) to examine the escalating negative sensory consequences of progressive respiratory impairment with disease advancement; and 3) to build a physiological rationale for individualised treatment optimisation based on CPET.
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Affiliation(s)
- Denis E O'Donnell
- Dept of Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada
| | - Amany F Elbehairy
- Dept of Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada Dept of Chest Diseases, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Azmy Faisal
- Dept of Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada Faculty of Physical Education for Men, Alexandria University, Alexandria, Egypt
| | - Katherine A Webb
- Dept of Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada
| | - J Alberto Neder
- Dept of Medicine, Queen's University and Kingston General Hospital, Kingston, ON, Canada
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Neder JA, Berton DC, Arbex FF, Alencar MC, Rocha A, Sperandio PA, Palange P, O'Donnell DE. Physiological and clinical relevance of exercise ventilatory efficiency in COPD. Eur Respir J 2017; 49:49/3/1602036. [PMID: 28275174 DOI: 10.1183/13993003.02036-2016] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 12/12/2016] [Indexed: 01/09/2023]
Abstract
Exercise ventilation (V'E) relative to carbon dioxide output (V'CO2 ) is particularly relevant to patients limited by the respiratory system, e.g. those with chronic obstructive pulmonary disease (COPD). High V'E-V'CO2 (poor ventilatory efficiency) has been found to be a key physiological abnormality in symptomatic patients with largely preserved forced expiratory volume in 1 s (FEV1). Establishing an association between high V'E-V'CO2 and exertional dyspnoea in mild COPD provides evidence that exercise intolerance is not a mere consequence of detraining. As the disease evolves, poor ventilatory efficiency might help explaining "out-of-proportion" breathlessness (to FEV1 impairment). Regardless, disease severity, cardiocirculatory co-morbidities such as heart failure and pulmonary hypertension have been found to increase V'E-V'CO2 In fact, a high V'E-V'CO2 has been found to be a powerful predictor of poor outcome in lung resection surgery. Moreover, a high V'E-V'CO2 has added value to resting lung hyperinflation in predicting all-cause and respiratory mortality across the spectrum of COPD severity. Documenting improved ventilatory efficiency after lung transplantation and lung volume reduction surgery provides objective evidence of treatment efficacy. Considering the usefulness of exercise ventilatory efficiency in different clinical scenarios, the V'E-V'CO2 relationship should be valued in the interpretation of cardiopulmonary exercise tests in patients with mild-to-end-stage COPD.
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Affiliation(s)
- J Alberto Neder
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada
| | - Danilo C Berton
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada.,Division of Respiratory Medicine, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Flavio F Arbex
- Pulmonary Function and Clinical Exercise Physiology, Respiratory Division, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Maria Clara Alencar
- Division of Cardiology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Alcides Rocha
- Pulmonary Function and Clinical Exercise Physiology, Respiratory Division, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Priscila A Sperandio
- Pulmonary Function and Clinical Exercise Physiology, Respiratory Division, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Paolo Palange
- Dept of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Denis E O'Donnell
- Respiratory Investigation Unit and Laboratory of Clinical Exercise Physiology, Queen's University and Kingston General Hospital, Kingston, ON, Canada
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O'Donnell DE, Elbehairy AF, Berton DC, Domnik NJ, Neder JA. Advances in the Evaluation of Respiratory Pathophysiology during Exercise in Chronic Lung Diseases. Front Physiol 2017; 8:82. [PMID: 28275353 PMCID: PMC5319975 DOI: 10.3389/fphys.2017.00082] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/30/2017] [Indexed: 11/13/2022] Open
Abstract
Dyspnea and exercise limitation are among the most common symptoms experienced by patients with various chronic lung diseases and are linked to poor quality of life. Our understanding of the source and nature of perceived respiratory discomfort and exercise intolerance in chronic lung diseases has increased substantially in recent years. These new mechanistic insights are the primary focus of the current review. Cardiopulmonary exercise testing (CPET) provides a unique opportunity to objectively evaluate the ability of the respiratory system to respond to imposed incremental physiological stress. In addition to measuring aerobic capacity and quantifying an individual's cardiac and ventilatory reserves, we have expanded the role of CPET to include evaluation of symptom intensity, together with a simple "non-invasive" assessment of relevant ventilatory control parameters and dynamic respiratory mechanics during standardized incremental tests to tolerance. This review explores the application of the new advances in the clinical evaluation of the pathophysiology of exercise intolerance in chronic obstructive pulmonary disease (COPD), chronic asthma, interstitial lung disease (ILD) and pulmonary arterial hypertension (PAH). We hope to demonstrate how this novel approach to CPET interpretation, which includes a quantification of activity-related dyspnea and evaluation of its underlying mechanisms, enhances our ability to meaningfully intervene to improve quality of life in these pathologically-distinct conditions.
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Affiliation(s)
- Denis E. O'Donnell
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General HospitalKingston, ON, Canada
| | - Amany F. Elbehairy
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General HospitalKingston, ON, Canada
- Department of Chest Diseases, Faculty of Medicine, Alexandria UniversityAlexandria, Egypt
| | - Danilo C. Berton
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General HospitalKingston, ON, Canada
| | - Nicolle J. Domnik
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General HospitalKingston, ON, Canada
| | - J. Alberto Neder
- Division of Respiratory Medicine, Department of Medicine, Queen's University and Kingston General HospitalKingston, ON, Canada
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Dowman LM, McDonald CF, Bozinovski S, Vlahos R, Gillies R, Pouniotis D, Hill CJ, Goh NS, Holland AE. Greater endurance capacity and improved dyspnoea with acute oxygen supplementation in idiopathic pulmonary fibrosis patients without resting hypoxaemia. Respirology 2017; 22:957-964. [DOI: 10.1111/resp.13002] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 12/10/2016] [Accepted: 12/26/2016] [Indexed: 02/01/2023]
Affiliation(s)
- Leona M. Dowman
- Discipline of Physiotherapy; La Trobe University, Alfred Centre; Melbourne Victoria Australia
- Department of Respiratory & Sleep Medicine; Austin Health; Melbourne Victoria Australia
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
- Department of Physiotherapy; Austin Health; Melbourne Victoria Australia
| | - Christine F. McDonald
- Department of Respiratory & Sleep Medicine; Austin Health; Melbourne Victoria Australia
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
- Department of Medicine; University of Melbourne; Melbourne Victoria Australia
| | - Steven Bozinovski
- School of Health and Biomedical Sciences; RMIT University; Melbourne Victoria Australia
| | - Ross Vlahos
- School of Health and Biomedical Sciences; RMIT University; Melbourne Victoria Australia
| | - Rebecca Gillies
- Discipline of Physiotherapy; La Trobe University, Alfred Centre; Melbourne Victoria Australia
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
| | - Dodie Pouniotis
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
- School of Health and Biomedical Sciences; RMIT University; Melbourne Victoria Australia
| | - Catherine J. Hill
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
- Department of Physiotherapy; Austin Health; Melbourne Victoria Australia
| | - Nicole S.L. Goh
- Department of Respiratory & Sleep Medicine; Austin Health; Melbourne Victoria Australia
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
| | - Anne E Holland
- Discipline of Physiotherapy; La Trobe University, Alfred Centre; Melbourne Victoria Australia
- Institute for Breathing and Sleep; Austin Health; Melbourne Victoria Australia
- Department of Physiotherapy; Alfred Health; Melbourne Victoria Australia
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Jarosch I, Gloeckl R, Damm E, Schwedhelm AL, Buhrow D, Jerrentrup A, Spruit MA, Kenn K. Short-term Effects of Supplemental Oxygen on 6-Min Walk Test Outcomes in Patients With COPD: A Randomized, Placebo-Controlled, Single-blind, Crossover Trial. Chest 2016; 151:795-803. [PMID: 27940278 DOI: 10.1016/j.chest.2016.11.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/16/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND The acute effect of supplemental oxygen during exercise has been shown to differ largely among patients with COPD. It is unknown what factors influence oxygen response. METHODS In a randomized, single-blind fashion, 124 patients with COPD underwent one 6-min walk test on supplemental oxygen (6MWTO2) and one 6-min walk test on room air after a practice 6-min walk test. Both gases were delivered via standard nasal prongs (2 L/min). For analyses, patients were stratified on the basis of PaO2 values and compared: (1) 34 patients with resting hypoxemia (HYX); (2) 43 patients with exercise-induced hypoxemia (EIH); and (3) 31 patients with normoxemia (NOX). RESULTS Oxygen supplementation resulted in an increase in the 6-min walk distance in the total cohort (27 ± 42 meters; P < .001) and in the subgroups of HYX (37 ± 40 meters; P < .001) and EIH (28 ± 44 meters; P < .001) but not in the NOX subgroup (15 ± 43 meters; P = .065). Forty-two percent of patients with HYX and 47% of patients with EIH improved their 6-min walk distance to a clinically relevant extent (≥ 30 meters) by using oxygen. These oxygen responders were characterized by significantly lower 6-min walk distance using room air compared with patients without a relevant response (306 ± 106 meters vs 358 ± 113 meters; P < .05). Although oxygen saturation was significantly higher during 6MWTO2 compared with the 6-min walk test on room air in all 3 subgroups, it dropped to < 88% during 6MWTO2 in 73.5% of patients with HYX. CONCLUSIONS In contrast to patients with NOX, patients with HYX and EIH generally benefit from supplemental oxygen by increasing exercise capacity. However, less than one-half of patients reached the threshold of clinically relevant improvements. These oxygen responders were characterized by significantly lower exercise capacity levels. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT00886639; URL: www.clinicaltrials.gov.
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Affiliation(s)
- Inga Jarosch
- Department of Respiratory Medicine and Pulmonary Rehabilitation, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany.
| | - Rainer Gloeckl
- Department of Respiratory Medicine and Pulmonary Rehabilitation, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany; Department for Prevention, Rehabilitation and Sports Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany
| | - Eva Damm
- Department of Pneumology and Critical Care Medicine, University of Marburg, Marburg, Germany
| | - Anna-Lena Schwedhelm
- Department of Pneumology and Critical Care Medicine, University of Marburg, Marburg, Germany
| | - David Buhrow
- Department of Pneumology and Critical Care Medicine, University of Marburg, Marburg, Germany
| | - Andreas Jerrentrup
- Department of Pneumology and Critical Care Medicine, University of Marburg, Marburg, Germany
| | - Martijn A Spruit
- Department of Research and Education, CIRO+, Center of Expertise for Chronic Organ Failure, Horn, the Netherlands; REVAL-Rehabilitation Research Center, BIOMED-Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium; Department of Respiratory Medicine, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
| | - Klaus Kenn
- Department of Respiratory Medicine and Pulmonary Rehabilitation, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany; Department of Pulmonary Rehabilitation, University of Marburg, Marburg, Germany
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Early-Phase Recovery of Cardiorespiratory Measurements after Maximal Cardiopulmonary Exercise Testing in Patients with Chronic Obstructive Pulmonary Disease. Pulm Med 2016; 2016:9160781. [PMID: 28018674 PMCID: PMC5149691 DOI: 10.1155/2016/9160781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 10/18/2016] [Accepted: 10/27/2016] [Indexed: 11/17/2022] Open
Abstract
Background. This study investigated respiratory gas exchanges and heart rate (HR) kinetics during early-phase recovery after a maximal cardiopulmonary exercise test (CPET) in patients with chronic obstructive pulmonary disease (COPD) grouped according to airflow limitation. Methods. Thirty control individuals (control group: CG) and 81 COPD patients (45 with "mild" or "moderate" airflow limitation, COPDI-II, versus 36 with "severe" or "very severe" COPD, COPDIII-IV) performed a maximal CPET. The first 3 min of recovery kinetics was investigated for oxygen uptake ([Formula: see text]O2), minute ventilation ([Formula: see text]), respiratory equivalence, and HR. The time for [Formula: see text]O2 to reach 25% (T1/4[Formula: see text]O2) of peak value was also determined and compared. Results. The [Formula: see text]O2, [Formula: see text], and HR recovery kinetics were significantly slower in both COPD groups than CG (p < 0.05). Moreover, COPDIII-IV group had significantly higher [Formula: see text]O2 and [Formula: see text] during recovery than COPDI-II group (p < 0.05). T1/4[Formula: see text]O2 significantly differed between groups (p < 0.01; 58 ± 18 s in CG, 79 ± 26 s in COPDI-II group, and 121 ± 34 s in COPDIII-IV) and was significantly correlated with forced expiratory volume in one second in COPD patients (p < 0.001, r = 0.53) and with peak power output (p < 0.001, r = 0.59). Conclusion. The COPD groups showed slower kinetics in the early recovery period than CG, and the kinetics varied with severity of airflow obstruction.
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Ekström M, Ahmadi Z, Bornefalk‐Hermansson A, Abernethy A, Currow D. Oxygen for breathlessness in patients with chronic obstructive pulmonary disease who do not qualify for home oxygen therapy. Cochrane Database Syst Rev 2016; 11:CD006429. [PMID: 27886372 PMCID: PMC6464154 DOI: 10.1002/14651858.cd006429.pub3] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Breathlessness is a cardinal symptom of chronic obstructive pulmonary disease (COPD). Long-term oxygen therapy (LTOT) is given to improve survival time in people with COPD and severe chronic hypoxaemia at rest. The efficacy of oxygen therapy for breathlessness and health-related quality of life (HRQOL) in people with COPD and mild or no hypoxaemia who do not meet the criteria for LTOT has not been established. OBJECTIVES To determine the efficacy of oxygen versus air in mildly hypoxaemic or non-hypoxaemic patients with COPD in terms of (1) breathlessness; (2) HRQOL; (3) patient preference whether to continue therapy; and (4) oxygen-related adverse events. SEARCH METHODS We searched the Cochrane Airways Group Register, the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE and Embase, to 12 July 2016, for randomised controlled trials (RCTs). We handsearched the reference lists of included articles. SELECTION CRITERIA We included RCTs of the effects of non-invasive oxygen versus air on breathlessness, HRQOL or patient preference to continue therapy among people with COPD and mild or no hypoxaemia (partial pressure of oxygen (PaO2) > 7.3 kPa) who were not already receiving LTOT. Two review authors independently assessed articles for inclusion in the review. DATA COLLECTION AND ANALYSIS Two review authors independently collected and analysed data. We assessed risk of bias by using the Cochrane 'Risk of bias tool'. We pooled effects recorded on different scales as standardised mean differences (SMDs) with 95% confidence intervals (CIs) using random-effects models. Lower SMDs indicated decreased breathlessness and reduced HRQOL. We performed subanalyses and sensitivity analyses and assessed the quality of evidence according to the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach. MAIN RESULTS Compared with the previous review, which was published in 2011, we included 14 additional studies (493 participants), excluded one study and included data for meta-analysis of HRQOL. In total, we included in this review 44 studies including 1195 participants, and we included 33 of these (901 participants)in the meta-analysis.We found that breathlessness during exercise or daily activities was reduced by oxygen compared with air (32 studies; 865 participants; SMD -0.34, 95% CI -0.48 to -0.21; I2 = 37%; low-quality evidence). This translates to a decrease in breathlessness of about 0.7 points on a 0 to 10 numerical rating scale. In contrast, we found no effect of short-burst oxygen given before exercise (four studies; 90 participants; SMD 0.01, 95% CI -0.26 to 0.28; I2 = 0%; low-quality evidence). Oxygen reduced breathlessness measured during exercise tests (25 studies; 442 participants; SMD -0.34, 95% CI -0.46 to -0.22; I2 = 29%; moderate-quality evidence), whereas evidence of an effect on breathlessness measured in daily life was limited (two studies; 274 participants; SMD -0.13, 95% CI, -0.37 to 0.11; I2 = 0%; low-quality evidence).Oxygen did not clearly affect HRQOL (five studies; 267 participants; SMD 0.10, 95% CI -0.06 to 0.26; I2 = 0%; low-quality evidence). Patient preference and adverse events could not be analysed owing to insufficient data. AUTHORS' CONCLUSIONS We are moderately confident that oxygen can relieve breathlessness when given during exercise to mildly hypoxaemic and non-hypoxaemic people with chronic obstructive pulmonary disease who would not otherwise qualify for home oxygen therapy. Most evidence pertains to acute effects during exercise tests, and no evidence indicates that oxygen decreases breathlessness in the daily life setting. Findings show that oxygen does not affect health-related quality of life.
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Affiliation(s)
- Magnus Ekström
- Lund UniversityDepartment of Clinical Sciences, Division of Respiratory Medicine & AllergologyLundSweden
| | - Zainab Ahmadi
- Lund UniversityDepartment of Clinical Sciences, Division of Respiratory Medicine & AllergologyLundSweden
| | | | - Amy Abernethy
- Duke University Medical CenterCLHCDurhamNorth CarolinaUSA
| | - David Currow
- Flinders UniversityDepartment of Palliative and Supportive Services700 Goodwood RoadDaw ParkSAAustralia5041
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