Active expiration occurs in which ventilator mode?

a. Proportional assist ventilation
b. High-frequency jet ventilation
c. Airway pressure-release ventilation
d. High-frequency oscillatory ventilation


ANS: D
With high-frequency oscillatory ventilation, pressure is positive in the airway during the inspira-tory phase and negative during the expiratory phase. Both inspiration and expiration are active.

Health Professions

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