Source: Annual Congress 2003 - COPD: a multicomponent disease
Disease area: Airway diseases

Abstract

Despite widespread use, short-burst oxygen (SBO) remains an unproven treatment for reduction of exertion-related dyspnoea in COPD. The aim of this study was to determine (i) whether SBO immediately before exercise reduces dyspnoea, and improves performance, and (ii) whether SBO immediately after exercise reduces dyspnoea during recovery.
Twenty-two clinically stable COPD patients (mean FEV1 34% predicted, mean resting saturation 94%) undertook four six-minute walk tests (6MW) at two sessions, one week apart. Cylinder air or oxygen were administered in random order in single-blind fashion for 5 minutes immediately prior to the first two 6MW, and during recovery following the final two 6MW. Dyspnoea was self-rated by subjects using the modified Borg scale, before, at the end of, and during recovery from each 6MW.
For air compared with oxygen given before exercise, there was no significant difference in mean 6MW distance (373.5 and 383.6 m respectively, p=0.09), or final Borg score (4.8 and 5.1 respectively, p=0.67). There was also no significant difference in mean recovery time (defined as time-to-resting Borg score) between air and oxygen given after exercise (166.5 and 168.6 seconds respectively, p=0.59). Only 2 subjects demonstrated a clinically significant reduction in dyspnoea, consistent at both sessions, for oxygen compared with air either before or after exercise.
Overall, SBO neither reduced dyspnoea nor improved performance. This study does not support the use of short-burst oxygen either immediately before or after exercise.

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Citations should be made in the following way:
C. A. Lewis, T. E. Eaton, P. Young, J. Kolbe (Auckland, New Zealand). Short-burst oxygen immediately before and after exercise in COPD patients is ineffective. Eur Respir J 2003; 22: Suppl. 45, 3372

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