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2 Soni AK，Miller CG，Pratt SD，et al.Low dose intrathecal ropivacaine with or without sufentanil provides effective analgesia and does not imˉpair motor strength during labour:a pilot study.Can J Anaesth，2001，48（7）:677-680.
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4 金胜威，徐旭仲，苏尔瞻，等.罗哌卡因腰麻复合硬膜外麻醉用于分娩镇痛对初产妇产程的影响.中华妇产科杂志，2002，37（3）:171-172.
（收稿日期:2003-01-17）
作者单位:510507武警广东省总队医院妇产科
