Figure 1

Study protocol for weaning from invasive ventilator support. SBT, spontaneous breathing trial; CPAP, continuous positive airway pressure; FIO2, inspiratory oxygen fraction; PEEP, positive end-expiratory pressure; PS, pressure support; RM, recruitment maneuver, RM was performed at the pressure of 30 cmH2O for 30 s; SIMV, synchronized intermittent mandatory ventilation.