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  • Title: [Effect of the continuous epidural buprenorphine injection in patients after lower extremity arthroplasty].
    Author: Asajima R, Nishikawa N, Kida H, Matsunami K.
    Journal: Masui; 1998 Apr; 47(4):466-9. PubMed ID: 9594519.
    Abstract:
    We studied the analgesic effects of continuous epidural injection of buprenorphine in patients after lower extremity arthroplasty. In these patients anesthesia was maintained only with lumbar epidural anesthesia with 2% mepivacaine. We employed a balloon type continuous infuser (DIB Catheter, 40 ml.day-1) for postoperative analgesia for twenty-four hours. The patients were classified into three groups according to the method of buprenorphine injection and the content of DIB Catheter. First group (group A ; N = 37) received buprenorphine (0.2 mg) with 0.25% bupivacaine (40 ml) for twenty-four hours. Next group (group B ; N = 27) received bolus injection of buprenorphine (0.2 mg) for the first additional epidural injection of local anesthetic and received continuous injection of buprenorphine (0.2 mg) with 0.25% bupivacaine (40 ml) for twenty-four hours. The last group (Group C ; N = 40) also received bolus injection of buprenorphine as in group B, but received continuous buprenorphine infusion with normal saline instead of local anesthetics. The analgesic effect was determined by the postoperative usage of other analgesics (NSAID or pentazocine) by request of patients. In twenty-four hours, the numbers of patients who did not request other analgesics were 6 (Group A. 16%), 9 (Group B. 33%) and 19 (Group C. 48%), respectively. In Group A, 18 patients requested analgesics, but only 8 patients requested in Group C. It was effective for the postoperative analgesia to use the continuous epidural injection with DIB Catheter for patients after lower extremity arthroplasty. It was necessary to give a bolus injection of buprenorphine before the end of surgery for sufficient analgesia, but it was not necessary to add local anesthetics in the content of DIB Catheter.
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