Effect of NAVA on Weaning Duration in Difficult to Wean Patients

It has been showed that over assist and patient ventilator asynchrony often occur in mechanical ventilated patients, especially in patients who failed weaning, which are associated with a prolonged duration of mechanical ventilation.Neurally adjusted ventilatory assist (NAVA) improves patient-ventilator synchrony, prevents excessive assist induced diaphragm inactivation. So the aim of this study was to detect that whether NAVA compared with PSV has the ability to reduce the duration of weaning in difficult to wean patients.