Theoretically, a nonrebreathing mask can deliver 100% oxygen, assuming that the mask fits ap-propriately on the patient's face and is the only source of gas being inhaled by the patient
However, in actual practice, the disposable nonrebreathing mask can deliver what percentage of FIO2?
a. 0.30-0.50 c. 0.60-0.80
b. 0.40-0.60 d. 0.24-0.50
ANS: C
The discrepancy between disposable nonrebreathing masks and the original Booth-by-Lovelace-Bulbulian masks is primarily related to the fact that manufacturers usually supply disposable masks with one of the exhalation valves removed.
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