1. Benefits of an Oxygen Reservoir Cannula versus a Conventional Nasal Cannula during Exercise in Hypoxemic COPD Patients: A Crossover Trial
Respiration 2014;88: DOI: /
Fig. 1. A patient during the CWRT receiving O2 supplementation with the Oxymizer (his written consent was received for publication of this photograph).
© 2014 S. Karger AG, Basel

2. Benefits of an Oxygen Reservoir Cannula versus a Conventional Nasal Cannula during Exercise in Hypoxemic COPD Patients: A Crossover Trial
Respiration 2014;88: DOI: /
Fig. 2. Endurance time during CWRT in 43 patients with COPD using a CNC or the Oxymizer (** p < 0.01).
© 2014 S. Karger AG, Basel

3. Benefits of an Oxygen Reservoir Cannula versus a Conventional Nasal Cannula during Exercise in Hypoxemic COPD Patients: A Crossover Trial
Respiration 2014;88: DOI: /
Fig. 3. SpO2 at rest (baseline) before the CWRT and at isotime in 43 COPD patients using O2 application with the Oxymizer or a CNC (* p < 0.05).
© 2014 S. Karger AG, Basel

4. Benefits of an Oxygen Reservoir Cannula versus a Conventional Nasal Cannula during Exercise in Hypoxemic COPD Patients: A Crossover Trial
Respiration 2014;88: DOI: /
Fig. 4. Additional benefit of the Oxymizer on endurance time during the CWRT in comparison to with a CNC in 43 COPD patients depending on their individual amount of O2 supplementation in liters/min (* p < 0.05).
© 2014 S. Karger AG, Basel