Anaesthesia for urological endoscopic procedures in adult outpatients.

: The aim of this study was to establish whether propofol in combination with fentanyl or ketamine provides a good quality of anaesthesia and recovery time in urological endoscopic outpatient surgery. Sixty patients (ASA I-II) were assigned randomly to receive either 2.5 micrograms kg-1 fentanyl or 1 mg kg-1 ketamine. In both groups anaesthesia was induced with propofol 1.5 mg kg-1 and maintained with 7 mg kg-1 h-1. Patients breathed nitrous oxide and oxygen 3:2 spontaneously. Cardiovascular parameters were more stable after ketamine. The most important side effect was the presence of apnoea lasting longer than 60 s in 14 patients receiving fentanyl. The time to establish alertness was shorter in the ketamine group, who also had a better (P < 0.05) as well as post-anaesthetic recovery room score.