Figure 1.

Double‐triggering occurs when a spontaneous effort triggers a (second) ventilator breath before the initial breath has completely exhaled (arrow). The pressure-time trace (upper panel) and flow-time trace (mid panel) demonstrate the occurrence of the additional breath, but do not give a sense that both inspirations are summed; this is apparent from the volume-time (lower panel) trace indicating that the double-triggering results in a substantially larger (potentially injurious) VT (red) compared with regular triggering (blue). Legend: VT: tidal volume. With authors permission [15].