Mask CPAP is used with pulmonary edema patients because it does all of the following EXCEPT:
a. decrease vascular congestion.
b. reduce work of breathing.
c. it is less expensive than mechanical ventilation.
d. improve lung compliance.
C
Although CPAP may be less expensive than mechanical ventilation, that is not why it is used. Mask CPAP is used because it decreases vascular congestion, reduces work of breathing, and improves lung compliance. These things improve oxygenation and may preclude the need for mechanical ventilation.
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