Pressure Support and Positive End Expiratory Pressure During Spontaneous Breathing Trial

Inclusion Criteria: * Patient 18 years old or more * Intubated and ventilated in intensive care unit for more than 24 hours * Patient ready for weaning evaluation * Failure of a first T-piece SBT Exclusion Criteria: * Chronic neuromuscular disease * Guillain-Barré Syndrome * Central nervous system disease with consciousness disorder * Tracheostomy * Chronic disease with life expectancy less than 1 year * Pregnancy, breast feeding * Withholding life support regarding a reintubation * Prisoner or patient interned in psychiatric hospital * Guardianship * Language barrier * Lack of medical insurance * Lack of the patient's consent (or of the next of kin where appropriate) * Patient under an exclusion period after enrollment in another research study