FiO2 in Chronic Obstructive Pulmonary Disease (COPD) Patient Normobaric O2 Versus NIV
FiO2 in Chronic Obstructive Pulmonary Disease (COPD) Patient Normobaric O2 Versus NIV
The purpose of this study is to compare pharyngeal FiO2 in day time with nasal normobaric O2
 with inhaled FiO2 in the night time with home care ventilator NIV at the same O2 flow.
in a prospective observational study the investigators will register FiO2 in 15 voluntaries
 COPD patients as following:

 -  Pharyngeal FiO2 (G5® Philips™ side stream FiO2) with O2 supply through nasal cannula at
 basal flow (flow needed by patient). In order to compare FiO2s the investigators will
 measure FiO2 with 150%, 75%, 50% and 25 % of basal Flow

 -  And FiO2 during nocturnal NIV (pressure support ventilation; Vivo 50®, Bréas™), using
 facial or nasal masque (Confort Gel® Respironics™). O2 flow will be basal flow.
Inclusion Criteria:

 -  informed consent

 Exclusion Criteria:

 -  acute on chronic respiratory distress