"Pentazepam" (pentazocine + diazepam) supplementing local analgesia for laparoscopic sterilization

Salpingectomy by laparoscopy in 200 healthy outpatients employed local analgesia and "pentazepam" (pentazocine 90 mg and diazepam 30 mg in 250 ml of 5% D/W) as anesthesia. Patients received no premedication, ventilated spontaneously, without tracheal intubation, but were given nasal O2 at 3 L/min throughout the procedure. N2O was used for abdominal insufflation, and the abdominal pressure and Trendelenburg position were restricted to less than 20 cm H2O pressure and 30 degrees, respectively. Changes in arterial blood gases measured in 12 patients were unremarkable. Prolonged recovery, unsatisfactory surgical conditions, tachycardia, nausea and vomiting were infrequent.