The American review of respiratory disease
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Am. Rev. Respir. Dis. · Mar 1990
Randomized Controlled Trial Comparative Study Clinical TrialExercise tolerance during nasal cannula and transtracheal oxygen delivery.
Previous studies have reported that exercise tolerance improves with transtracheal oxygen delivery. However, patients were not blinded to the delivery technique used, introducing a potential source of bias. The purpose of this study was to compare exercise tolerance during nasal cannula and transtracheal delivery using a randomized double-blinded technique. ⋯ We conclude that exercise tolerance improves when oxygen is delivered by transtracheal catheter. This improvement is unrelated to an increase in SaO2. We speculate that the increase in exercise tolerance may be related to other physiologic effects of flow through the catheter.