T-piece Versus Pressure-support for the Spontaneous Breathing Trial

T-piece trial will be performed for around 1 hour with a T-piece connected to the extremity of the endotracheal tube by simply disconnecting the patient from the ventilator and by providing additional oxygen (≤ 6 L/min)

Pressure-Support trial will be performed for around 1 hour without disconnecting the patient from the ventilator, by using a low level of pressure-support (PS 8 cm H2O) with a FiO2 ≤ 40% and without positive end-expiratory pressure (PEEP), while continuously monitoring the respiratory rate and tidal volume on the ventilator display.