Fig. 3
From: Validation of the flow index to detect low inspiratory effort during pressure support ventilation
Incidence of low inspiratory effort by different definitions. Data are shown as low inspiratory effort only defined by criteria of work of breathing (WOB), esophageal pressure–time product (PTPes) per minute, or inspiratory muscle pressure (Pmus), only defined by criteria of ineffective effort (IE) index, and defined by both effort parameters based on esophageal pressure and IE index criteria