Instrumental Respiratory Physiotherapy in Difficult-to-wean ICU Patients

Inclusion Criteria: * Patient 18 years or more, affiliated to a social security system * Patients on invasive mechanical ventilation for 48 hours or more * Failure of at least one mechanical ventilation weaning test (spontaneous breathing trial, SBT) * First successful SBT on the day of eligibility assessment * Medical Research Council (MRC) score \< 48 and/or cough strength ≤ 2 on the 6-point Likert scale Exclusion Criteria: * Recent brain injury (\< 3 months, stroke, cardiopulmonary arrest) * Delirium tremens (Cushman score \> 7) * Chronic neuromuscular pathology * Patient under continuous intravenous sedation * Patient unresponsive to simple commands and Richmond Agitation and Sedation Scale (RASS) score \< -2 or \> +1 * FiO2: Inspired Oxygen Fraction\> 50%, percutaneous, O2: oxygen saturation \< 88%, positive end-expiratory pressure \> 5 centimeter of water (cmH2O) or respiratory rate ≥ 35 min-1 * Vasopressor catecholamine at a dose \> 0.5 μg/kg/min * Tracheostomized patient * Undrained pneumothorax * Pulmonary emphysema (identified as antecedent in medical record) * Uncontrolled hemoptysis * Surgery \< 3 months of esophagus and/or the ear, nose and throat (ENT) sphere * Pregnancy or lactating * Patient deprived of liberty by judicial or administrative decision * Patient under guardianship or curatorship * Patient already included in the same study or in another study sharing the same primary endpoint