A nonrebreathing mask has been replaced by a high-flow nasal cannula humidifier set at 15 L/min. The benefit of this device to a patient is that it:
a. decreases airway resistance.
b. delivers medication to the airways.
c. prevents an increased humidity deficit.
d. dilutes thick secretions for easy removal.
ANS: C
The high-flow nasal cannula humidifier will prevent an increase in humidity deficit because it us-es a special bubble humidifier that can accommodate the rapid flow rates and still humidify the gas.
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