How Is Oxygen Percentage Regulated in a Heated Humidified High

question 40

Multiple Choice

How is oxygen percentage regulated in a heated humidified high flow nasal cannula?

• A) It is factor preset.
• B) It is adjusted using air dilution (HAFOE).
• C) It is adjusted by setting two flowmeters; one for air and the other for oxygen.
• D) There are proportional solenoid valves that adjust the oxygen percentage.

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