1. Induction of anaesthesia. For preoperative sedation 0.02 mg/kg midazolam IV will be administered. 2 minutes of 0.2 µ/kg/min remifentanil and 6 mg kg st-1 propofol infusion, IV 1-2 mg kg-1 propofol . No muscle relaxant will be used for insertion of the airway device.