Fig. 4
Correlation for the global population between inspiratory muscle activity of diaphragm (left) and parasternal intercostals (right), and inspiratory work of breathing in each condition of ventilator assistance. On the right side of each graph, the respective determination coefficient R2 is shown for each condition of ventilator assistance. CSV continuous spontaneous ventilation, EMGamp EMG activity amplitude, EMGAUC/min integral of EMG signal over time during the inspiration multiplied with the respiratory rate, PC-IMV pressure-controlled intermittent mandatory ventilation, Pesamp esophageal pressure amplitude, PS pressure support, and PTP pressure time product of esophageal pressure multiplied with the respiratory rate