Hamilton G5 - Adaptive Support Ventilation (ASV; Adaptive Support Ventilation (ASV); Duopap (Duo Positive Airway Pressure) and APRV (Airway Pressure Release Ventilation; Introduction

624074/07 B-15
B.5.2 Adaptive support ventilation (ASV)
See Appendix C, ASV, for detailed information on this mode.
B.5.3 DuoPAP (Duo positive airway pressure) and
APRV (Airway pressure release ventilation)
B.5.3.1 Introduction
DuoPAP and APRV are two related forms of pressure ventilation
designed to support spontaneous breathing on two alternating
levels of CPAP. In these modes, the ventilator switches auto-
matically and regularly between two operator-selected levels
of positive airway pressure or CPAP (P high and low). Either
mode permits a combination of mandatory and spontaneous
breaths. The patient can breathe freely at either level, and
pressure support can be added to these spontaneous breaths.
Cycling between the levels is triggered by DuoPAP/APRV timing
settings or by patient effort. Pressure/time curves for these
modes are shown in Figure B-11 and Figure B-12.
The control settings active in the DuoPAP mode are shown in
Figure B-9. The control settings active in the APRV mode are
shown in Figure B-10.