You are giving a 80% He:20% O2 mixture to an asthmatic patient through a nonrebreathing mask with a compensated Thorpe tube O2 flowmeter set at 8 L/min. What is the actual flow being de-livered to the patient?

a. 10 L/min
b. 12 L/min
c. 14 L/min
d. 18 L/min


ANS: C
For example, the correction for an 80:20 helium-O2 mixture is 1.8.

Health Professions

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