Efficacy of Oxygen Therapy Delivered by Systems Using Oxygen-Saving Valves in COPD Patients
Efficacy of Oxygen Therapy Delivered by Systems Using Oxygen-Saving Valves in COPD Patients
The purpose of this study is to compare the efficacy of oxygen therapy delivered by systems
 using oxygen-saving valves or not (continuous oxygen). We aim to determine if systems using
 oxygen-saving valves are equally effective as continuous oxygen delivery systems in reducing
 exercise-induced hypoxemia in patients with COPD.
Inclusion Criteria:

 -  COPD on necessity of long term oxygen therapy

 -  Able to give their written consent

 Exclusion Criteria:

 -  Unstable patients with COPD

 -  Patients with restrictive respiratory disease

 -  Patients with cardiac or neurologic disease contre-indicating the different
 evaluations