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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f29_7_29822

©2013 UpToDate ® Print Email Airway pressure release ventilation (APRV) A: Continuous flow positive airway pressure (CPAP). B: During exhalation with CPAP, the CPAP valve opens and the airway pressure release (APR) valve closes. C: During airway pressure release from the preset CPAP level to ambient pressure, the CPAP valve closes and the APR valve opens. After closure of the APR valve, functional residual capacity (FRC) is re-established. Adapted from Downs JB, Stock MC, Crit Care Med 1987; 15:459.