Comparison of 2 anesthetic protocols in colonoscopy on a series of 100 patients

: The quality of the anaesthesia and of the recovery (appreciated by Newman's test) of two anesthetic technics for colonoscopies are compared on two homogeneous groups from 50 patients each: propofol alone versus midazolam-alfentanyl association. The differences registered during anaesthesia, particularly concerning the breathing depression might be attributed to alfentanyl which has been used often at important doses. The recovery is delayed in the midazolam + alfentanyl's group in comparison with the propofol's group. The difference is very significant at 15 and 60 minutes. The use's safety and the fast recovery with propofol incite to advocate it as an unique+ anaesthetic agent for colonoscopies.