A patient has a 0.40 air-entrainment mask on and is not tolerating it well at this time because of claustrophobia. A nasal cannula is placed on the patient. What liter flow should be set to match the appropriate FIO2?
a. 2 c. 4
b. 3 d. 5
ANS: D
5 L/min ? 4 = 20. 20 + 20 = 0.40 FIO2.
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