Airway & Ventilation第 4 / 100 题
A nasal cannula can deliver oxygen concentrations in approximately what range?
a.80 to 90 percent
b.60 to 70 percent
c.50 to 60 percent
d.24 to 44 percent
解析
At 1 to 6 L/min a nasal cannula delivers roughly 24 to 44 percent oxygen. It is best for patients needing low-concentration oxygen who cannot tolerate a mask.
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