What is the goal of using an unheated bubble humidifier with oronasal O2 delivery systems?
a. Raise the humidity of the gas to ambient levels.
b. Fully saturate the inspired gas to body temperature, ambient pressure, saturated (BTPS) conditions.
c. Cool the gas down to below room tem-perature.
d. Fully saturate the inspired gas to ambient temperature, ambient pressure, saturated (ATPS) conditions.
ANS: A
Unheated bubble humidifiers are commonly used with oronasal O2 delivery systems (see Chapter 41) the goal is to raise the water vapor content of the gas to ambient levels.
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