Comparison of Two FiO2 (1 or 0.5) for Tracheal Extubation in Post-anesthesia Care Unit

Inclusion Criteria

• •Patients undergoing general anesthesia, with invasive mechanical ventilation including an airway device (supraglottic airway device or tracheal tube) at their arrival in PACU.
• •ASA physical status classification 1, 2, or 3 stabilized.
• •Surgery performed in emergency operating room department including vascular, digestive, urological and minor trauma surgery or surgery performed in head and neck anesthesia pole block including anterior cervical spine, lumbar disc herniation, cranioplasty, nerve stimulator, vertebroplasty, narrow lumbar canal, simple arthrodesis (less than or equal to two stages), otological, ophthalmological and skin surgery.