Diaphragm Ultrasound to Predict Weaning Outcomes in Mechanically Ventilated Patients

This trial enrolled all the adult patients who were mechanically ventilated for more than 48 hours and met all creteria for extubation. Patients who needed reintubation for upper aiway obstruction, neurological or hemodynamic alteration were excluded. The diaphragm ultrasound was performed during spontaneous breathing test or pressure support ventilation trial measuring the dipahragmatic excursion (DE) and the diaphragm thickening fraction (DTF) whithin 24 hours before extubation.