The harmful cardiovascular effects of PPV are influenced most by which of the following pres-sures?
a. Peak inspiratory pressure
b. Mean airway pressure
c. Positive end-expiratory pressure
d. Transpulmonary pressure
ANS: B
The amount and duration of the pressure applied to the airway, the mean airway pressure, ulti-mately influences the extent of the harmful cardiovascular effects. The lower the mean airway pressure, the less marked the cardiovascular effects. This pressure takes into account the peak in-spiratory pressure, the positive end-expiratory pressure, the inspiratory time, and the total cycle time.
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