-ensure valves are patent, not stuck, so pt. expired air has a place to escape
venturi mask
-provides "custom" O2 level based on ABGs
-venturi mask best for pt. w/ chronic lung disease bc it delivers a more precise O2 concentration
CPAP/BiPap
both provide Noninvasive Positive Pressure Ventilation NPPV to keep
alveoli open and improve gas exchange w/o the need for intubation
CPAP: used for pt.s w/ sleep apnea, atelectasis after surgery or cardiac-induced pulm edema...helps hold open upper airways by providing constant pos. airway pressure throughout inhalation and exhalation
BiPap: pos. airway pressure higher on inspiration and lower on exppiration = improvement of tidal volume
What is the relationship beween L of O2 and O2 %?
Each L of O2 admin incr. the % of O2 delivered by about 4% from RA which is 21%