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.
Study Type
OBSERVATIONAL
Enrollment
14
Military teaching hospital Ste Anne
Toulon, VAR, France
Difference in FiO2 measured during NIV compared to the FiO2 measured during day time with nasal canula at similar O2 flow
Time frame: 18 hours
Time spent below different O2 levels during NIV despite constant O2 flow and their correlation to day time FiO2 with nasal canula
Time frame: 18 hours
levels of O2 adjustment needed to keep FiO2 stable with NIV
Time frame: 1 hour
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