If the absolute humidity in a medical gas being delivered to a patient is 14 mg/L, then what is the body humidity (BH)?
a. 7%
b. 16%
c. 24%
d. 32%
ANS: D
The %BH of a gas is the ratio of its actual water vapor content to the water vapor capacity in saturated gas at body temperature (37° C). Thus %BH is the same as RH, except that the capaci-ty (or denominator) is fixed at 43.8 mg/L.
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