Which of the following best describes the performance of a typical hygroscopic condenser HME?
a. 40 mg/L water vapor exhaled; 27 mg/L returned
b. 40 mg/L water vapor exhaled; 20 mg/L returned
c. 27 mg/L water vapor exhaled; 40 mg/L returned
d. 44 mg/L water vapor exhaled; 37 mg/L returned
ANS: A
These devices typically achieve approximately 70% efficiency (40 mg/L exhaled, 27 mg/L re-turned).
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