5Bromage PR. Rostral spread of epidural morphine. Anesthesiology, 1982,56(3): 431 ～ 433.
6Shafer AL, Donnelly AJ. Management of postoperative pain by continuous epidural infusion of analgesics. Clin Phar, 1991,10(10): 745 ～748.
7Choi JH, Lee J, Bishop MJ. Epidural naloxone reduces pruritus and nausea without affecting analgesia by epidural morphine in bupivacaine. Can J Anaesth, 2000,47(1): 33～ 37.
9Johnson A, Bengtsson M, Lofstrom JB. Influence of postoperative naloxone infusion on respiration and pain relief after intrathecal morphine. Reg Anesth, 1998,13(1): 46～51.
10Ballantyne JC, Loach AB, Carr DB. Itching after epidural and spinal opiates. Pain, 1998,33(2): 149～ 160.
