Ultrasound Diaphragmatic Thickening to Monitor Its Dysfunction in Patients With Sepsis

"Daily Measure of Diaphragmatic Thickening Fraction (DTF) will be performed by a trained physiotherapist. Physiotherapist (A. LE NEINDRE). The patient will be then instructed to perform breathing to total lung capacity and then to exhale to residual volume, when it is possible (awaken patient). Awakening status will be recorded. Mechanically ventilated patients will be evaluated in Pressure Support (PS) mode (during daily PS mode research for patients with Controlled Ventilation), with the lower PS level tolerated. PS level will be recorded.~Thickening fraction (TF) measure is performed in B-mode using the following formula: TF (%) = \[(end-inspiration thickness - end-expiration thickness)/(end-expiration thickness) x 100\]. Diaphragmatic dysfunction is defined like a DTF \< 20% (7)."