At 3 to 5 L/min output, a typical molecular sieve O2 concentrator provides O2 concentrations at what level?
a. 65% to 78%
b. 78% to 85%
c. 85% to 93%
d. Greater than 93%
ANS: C
At 3 to 5 L/min, O2 concentrations fall to between 85% and 93%.
Health Professions
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