Fig. 1From: Diaphragm function and weaning from mechanical ventilation: an ultrasound and phrenic nerve stimulation clinical studyPatients with successful spontaneous breathing trial and failed spontaneous breathing trial according to 7 cmH2O (a) and 11 cmH2O (b) thresholds of endotracheal pressure induced by a bilateral phrenic nerve stimulation (Ptr,stim) and 26% (c) threshold of diaphragm thickening fraction (TFdi). Numbers indicate the number of patients in each categoryBack to article page