Fig. 7

Bland–Altman plots of the trigger delay. The trigger delay \(\Delta t_{\textrm{trigger}}\) denotes the difference between the beginning of the ventilator support \(t^{P_{\textrm{aw}}}\) and the inspiratory patient effort \(t^{\textrm{patient}}\). In both plots, the reference \(\Delta t^{P_{\textrm{es}}}_{\textrm{trigger}}\) is built upon the manual annotation of patient efforts in the esophageal pressure \(P_{\textrm{es}}\). The left graph compares the trigger delay obtained from the sEMG segmentation results by the triangle algorithm and the second plot shows the results corresponding to the adaptive thresholding algorithm. Each sample in both plots denotes one synchronous or delayed trigger event. Different patients and recordings are characterized by means of colors. Solid lines represent the mean difference and dashed lines mark the \(\pm {1.96\,\textrm{Std}}\) intervals around average