A high-flow oxygen delivery device is set at 35%, and the oxygen flowmeter is set at 5 L/min. What is the total flow to the patient?

Question

Quizplus · Accepted Answer

The total flow to the patient can be calculated by dividing the set flow rate by the fraction of inspired oxygen (FiO2) minus the ambient air fraction (21%). For a device set at 35% oxygen, the calculation is 5 L/min divided by (0.35 - 0.21), which equals approximately 30 L/min.

A High-Flow Oxygen Delivery Device Is Set at 35%, and the Oxygen