An air entrainment device is set to deliver 30% oxygen.If back pressure is applied by water accumulating in the device distal to the entrainment port,what will happen to the FIO₂ delivered to the patient?
A) It would decrease.
B) It would increase.
C) It would remain unchanged.
D) It would increase initially, then decrease.

Question

Quizplus · Accepted Answer

Back pressure applied distal to the point of entrainment causes an increase in the delivered FIO₂.The back pressure may occur as a result of a kink in the delivery tubing,water build-up,humidification,secretions in the delivery tubing,or any of a number of other factors.

An Air Entrainment Device Is Set to Deliver 30% Oxygen