What type of oxygen device is used to administer heliox to a non-intubated patient?
a. Nasal cannula c. Simple mask
b. High-flow cannula d. Nonrebreathing mask
ANS: D
For non-intubated patients, a well-fitted nonrebreathing mask attached to a reservoir bag should be used. The flow rate of gas should be high enough to prevent the reservoir bag from collapsing during inspiration. Nasal cannulas are ineffective for delivering heliox because of leakage; in-stead, nonrebreathing masks are the most effective.
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