Impact of a Nocturnal Pressure Controlled Ventilation on Mechanical Ventilation Weaning Duration in Patients With Chronic Obstructive Respiratory Diseases

The weaning of mechanical ventilation is difficult period. This period is particularly difficult for patient with obstructive chronic respiratory disease and a long mechanical ventilation is associated with an increased risk of infectious complication, cardiac dysfunction, muscular weakness or barotromatism. No guideline is available on the ventilator mode to use during the night. In weaning period, some studies have demonstrated that nocturnal control ventilation during the weaning period improved the quality and the quantity of sleep. The hypothesis is that use of nocturnal controlled mechanical ventilation could decrease the weaning period duration and the ventilation weaning failure because of a sleep improvement. The main objective is to compare mechanical ventilation weaning period duration according to the nocturnal ventilator mode (pressure controlled ventilation versus pressure support ventilation) in patients with an obstructive respiratory disease. A secondary objective is to evaluate the rate of weaning failure after the first extubation according to the nocturnal ventilator mode and to evaluate the sleep during the weaning period according to the nocturnal ventilator mode.