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1 资料1·1 一般资料 1998年1月～1999年12月阿城市医院分娩总数为1671例,其中剖腹产634例,初产妇482例,经产妇及其他指征152例,而以初产妇胎头高浮而行剖腹产者为261例,年龄最大42岁,最小18岁,平均24.5岁,平均孕周为39~(+4)周1·2 剖腹产术式、麻醉及时机的选择 必须在确定已达足月或临近预产期而无先天畸形者等。大多选择局部麻醉及腹膜外剖腹产术(因患者不禁食,身体恢复较快)。1·3 影响初产妇胎头衔接的因素 大多数初产妇可在预产期1～2周内胎头衔接,若初产妇临产已开始,而胎头仍未衔接,可存在以下因素:
1 Data 1.1 General Information The total number of deliveries in hospitals in A City from January 1998 to December 1999 was 1,671, including 634 cases of caesarean section and 482 cases of primiparas, with 152 cases of maternal and other indications. 261 cases of high floating and caesarean section, the oldest 42 years old, the youngest 18 years old, average 24.5 years, the average gestational age of 39 ~ (+4) weeks 1.2 Caesarean section, anesthesia and timing of choice must be confirmed Up to full or near expected date without congenital malformations and so on. Mostly choose local anesthesia and extraperitoneal caesarean section (because the patient does not fasted, the body recovered faster). 1.3 Factors affecting the convergence of primiparous fetal head Most primiparous in the expected 1 to 2 weeks fetal head convergence, if the primiparous labor has begun, but the fetal head is still not convergence, there may be the following factors: