 1 PREOPERATIVE PHASE After obtaining informed consent to the study, several evaluations are performed in the Clinic for preoperative anesthesiology evaluation. These include the standard anesthesia evaluation, a geriatric and neuropsychological evaluation and an audiology evaluation. All preoperative evaluations are performed on the same day and in the same place during the normal path followed by outpatients scheduled for elective surgery. Geriatric, neuropsychological and audiology evaluation are always performed in the same sequence. 