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为了解气囊扩张宫颈对分娩及产程的影响，采用TD-100电脑全自动气囊助产仪，随机对47例（23例引产及24例临产后病例做观察组1、2）在人工破膜前行宫颈扩张术，并与47例同样条件产妇（对照组1、2）进行比较。观察组1的潜伏期平均时间4．93小时，与对照组1的7．89小时比较，P＜0．05。观察组2在破膜至活跃期的平均时间1．34小时，与对照组2的2．43小时比较，P＜0．01。两个观察组的第一产程均较对照组缩短。该方法不增加难产率及母儿合并症，是一种简便、安全的助产方法。
In order to understand the effect of balloon dilatation on delivery and labor, 47 cases (23 cases of induced abortion and 24 cases of postpartum cases) were randomly divided into two groups before artificial rupture of membranes Cervical dilation, and with 47 cases of the same conditions of maternal (control group 1,2) were compared. The mean latency of observation group 1 was 4.93 hours, P <0.05 compared with 7.89 hours of control group 1. The average time of observation group 2 during rupture of membrane to active phase was 1.34 hours, P <0.01 compared with 2.43 hours of control group 2. The first period of labor in both observation groups was shorter than the control group. The method does not increase the rate of dystocia and maternal complications, is a simple and safe method of midwifery.