Fig. 3

Tracings for Airway Pressure, Flow, and Electric Activity of the Diaphragm (EAdi) showing double-triggering in Neurally Adjusted Ventilatory Assist (NAVA) and Pressure Support Ventilation (PSV). a double triggering in NAVA; notice that despite the elevation of airway pressure on the second breath during the double triggering event, no flow is delivered to the patient, therefore no extra tidal volume was delivered in this second breath. b double triggering in PSV; the second breath during the double triggering event elevated the airway pressure and caused a positive inspiratory flow, therefore delivering a second tidal volume