Inclusion Criteria:  18 years or older Mechanically ventilated with oral or nasotracheal intubation Occurrence of an unscheduled extubation (auto-extubation or accidental extubation) Extubation is defined as the removal of the orotracheal or nasotracheal tube with the impossibility of reinsertion of the same device.  Exclusion Criteria:  Opposition to the use of personal data Pregnant women Person under protective custody or guardianship