the first weaning trial must be
performed as soon as the patient meets the following
criteria [12]: resolution of disease for which the
patient was intubated, cardiovascular stability with
no need or minimal vasopressors, no continuous
sedation and adequate oxygenation defined as
paO2/FiO2 of at least 150mmHg with positive endexpiratory
pressure (PEEP) up to 8cmH2O.