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约16％的早产主要是因宫颈机能不全引起。为研究孕妇直立体位对子宫颈的影响,将41例有宫颈机能不全高危因素的单胎孕妇做研究组(分为Ⅱ组和Ⅲ组),12例既往顺产的经产妇和12例无异常史的初孕妇做对照组(Ⅰ组)。检查时间:孕龄17～33周之间。方法:经阴道超声检查宫颈,患者取平卧位(至少平卧≥15min)和直立位(站立≥15min)。病人站立位进行检查时,一只脚踩在凳子上以便插入阴道探头。按闭合宫颈长度站立时比仰卧位减少<33％的孕妇为研究Ⅱ组,减少≥33％的孕妇为Ⅲ组。
About 16% of preterm birth is mainly caused by cervical insufficiency. In order to study the effect of upright position of the pregnant woman on the cervix, 41 cases of singleton pregnant women with high risk factors of cervical insufficiency were divided into two groups (group Ⅱ and group Ⅲ), 12 cases of past maternal and 12 cases without abnormal history The first pregnant women do the control group (Ⅰ group). Check the time: gestational age between 17 to 33 weeks. Methods: Transvaginal ultrasonography was performed on the cervix. The patient was supine (at least supine for ≥15 min) and upright (standing ≥15 min). When the patient stands for a check, one foot on the stool to insert the vaginal probe. According to the length of the closed cervix when standing less than the supine position <33% of pregnant women for the study Ⅱ group, reduce ≥ 33% of pregnant women for the group Ⅲ.