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Background: Early pain control after gastrectomy is essential to minimize complication. We have compared the analgesic efficacy and side effects of sufentanil versus morphine for postoperative epidural analgesia. And we investigated the optimal dosage of sufentanil. Methods: Sixty of seventy-five patients underwent gastrectomy were randomly allocated into three groups to receive ropivacaine 0.15%+sufentanil 0.5/hour (group S1), or ropivacaine 0.15%+sufentanil 1.0/hour (group S2) or ropivacaine 0.15% morphine+32/hour (group M). Before surgery, an epidural catheter was inserted at T 7-9 level and sufentanil 20 in group S1 and S2 or morphine 2 mg in group M were injected via the epidural catheter. After completion of surgery, continuous epidural infusion was started using PCEA device. Basal infusion rate, lock out time, bolus dose were 4 ml/hour, 20 minutes and 4 ml, respectively. Resting VAS, coughing VAS and side effects were recorded : immediate after awakening, 6, 12, 24, 48 hours after surgery. Forced vital capacity was assessed before and at 6, 24, 48 hours after surgery. Results: There were no significant differences in resting VAS, coughing VAS and FVC among three groups. The number of side effects, especially pruritus and sedation were significantly more in group M than group S1 and S2 (P /hour.

Comparison of Sufentanil and Morphine with Ropivacaine for Patient-controlled Epidural Analgesia after Gastrectomy