Fig. 2From: Combined effects of leaks, respiratory system properties and upper airway patency on the performance of home ventilators: a bench studyExample of patient-ventilator asynchrony events. V′: mask airflow; Pm: mask pressure; Pmus: inspiratory muscular pressure. An ineffective effort was defined as a simulated inspiratory effort that was not followed by an assisted pressure support in Pm (dot); An autotriggered cycle was defined as a non-backup ventilatory cycle that was delivered by the ventilator during the expiratory phase without a prior Pmus decrease (triangle)Back to article page