Qualifying Patients for Noninvasive Positive Pressure Ventilation Devices on Hospital Discharge CHEST APRV can feel complex, but its core idea is simple. And APRV is explained as CPAP with a release phase. That release phase is where the real advantage comes from. In this Figure 1 from Initiation of Noninvasive Ventilation for Sleep Related Hypoventilation Disorders: Advanced Modes and Devices Semantic Scholar Home ventilation consult MDedge