Benefits of an oxygen reservoir cannula versus a conventional nasal cannula during exercise in hypoxemic COPD patients: a crossover trial.

Background: The Oxymizer® is a special nasal cannula that provides a higher luminal diameter in combination with an incorporated oxygen (O2) reservoir. It is assumed that a higher O2 concentration can be delivered breath by breath in order to increase oxygenation.

Objective: We aimed to investigate the effects of the Oxymizer on endurance time in comparison to a conventional nasal cannula (CNC).