In general, to deliver O2 to the upper airway, a bubble humidifier is required only when the gas flow exceeds which of the following?
a. 1 L/min
b. 2 L/min
c. 3 L/min
d. 4 L/min
ANS: D
Regarding delivery of O2 to the upper airway, the American College of Chest Physicians advises against using a bubble humidifier at flow rates of 4 L/min or less.
Health Professions
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