Pressure controlled inverse ratio ventilation

Depiction of flow and airway pressure characteristics during a pressure limited breath provided by pressure-controlled inverse ratio ventilation (PC-IRV). End-expiratory alveolar pressure is positive at the end of the shortened expiratory period. Airflow has not ceased, and auto-PEEP has developed. A pressure limited breath without inverse ratio ventilation has similar pressure and flow characteristics except that flow has ceased at the end of expiration, and there is no auto-PEEP present.