[Value of moderate fentanyl dosage during anesthesis in abdominal surgery. Apropos of 100 cases]

Fentanyl was used in 100 abdominal surgical interventions, combined with droperidol or with diazepan, always with good results as far as analgesia was concerned. Tensional variations that occurred during the induction were quite small and disappeared during the filling up. In the course of the intervention, tensional variations were only met with subjects suffering from high blood pressure. The respiratory depression that went with analgesia did not constitute an obstacle but made it necessary to use artificial ventilation for the intervetion. The awakening was always quick, smooth, without any vomiting and was influenced neither by the time taken up by the intervention nor by the condition of the patient. No residual respiratory depression requiring the use of an anti-morphinic was noted. At the end of the study, fentanyl appears as a powerful analgesic, easy to use and successful in all the cases of abdominal surgery. Its effect does not last, a drawback that can be avoided by the use of an intravenous drip.