During pre-anesthesia visit, eligible patients receive oral and written information of the study and potential risks.~In the operating room all patients giving a written informed consent will undergo at the end of surgery a screening to determine eligibility for study entry.~Before emergence from general anesthesia, patients who meet the eligibility requirements will be randomized in a open label manner to receive a 0.5 or 1 FiO2.
The purpose of the study is to assess the optimal fraction of inspired oxygen (0.5 or 1) for extubation or removal of a supraglottic airway device after general anesthesia.