Fig. 2
From: Time-based capnography detects ineffective triggering in mechanically ventilated children
Representative example of ineffective triggering not visible in the time-based capnogram. Recording of ventilator flow (V′), airway pressure (Paw), oesophageal pressure (Poes) and end-tidal CO2 versus time tracings. The interrupted red line marks an ineffective patient effort with flow > 0 L/min. The continuous red line marks an ineffective patient effort but the flow remains < 0 L/min. Although a negative deflection is seen in the Paw and Poes tracings, there is no concomitant negative deflection in the time-based capnogram