Short-term ambulatory oxygen for chronic obstructive pulmonary disease
1Belfast City Hospital and Life and Health Sciences, Respiratory Medicine, University of Ulster, Newtownabbey, Ireland BT37 OQB. jm.bradley@ulster.ac.uk
The Cochrane Database of Systematic Reviews
|October 20, 2005
Summary
Ambulatory oxygen therapy improves exercise capacity and reduces breathlessness in patients with COPD. Further research is needed to confirm these benefits in larger trials and specific subgroups.
Area of Science:
- Pulmonary Medicine
- Respiratory Physiology
Background:
- Ambulatory oxygen therapy involves supplemental oxygen use during daily activities and exercise.
- Evidence for its efficacy stems from long-term and single assessment studies.
- Single assessment studies compare oxygen vs. placebo during exercise tests.
Purpose of the Study:
- To evaluate the effectiveness of ambulatory oxygen in Chronic Obstructive Pulmonary Disease (COPD) patients using single assessment studies.
Main Methods:
- Searched the Cochrane Airways Group COPD register for randomized controlled trials (RCTs).
- Included studies comparing oxygen and placebo administration during exercise tests in COPD patients.
- Data extracted and analyzed using RevMan 4.2.
Main Results:
- Thirty-one RCTs with 534 participants were included.
- Oxygen improved endurance and maximal exercise capacity (distance, time, steps, work rate).
- Oxygen also improved breathlessness, oxygen saturation (SaO2/PaO2), and reduced ventilation (VE) at isotime.
Conclusions:
- Small, single assessment studies suggest ambulatory oxygen benefits exercise performance in moderate to severe COPD.
- Findings may be influenced by publication bias and small sample sizes; larger trials are recommended.
- Maximal or endurance tests are suitable for assessment; SaO2 and breathlessness at isotime are key outcomes.
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