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目的探讨经会阴超声测量宫颈长度在早产预测中的临床价值。方法孕28~36周行产前检查正常孕妇66例(正常组),先兆早产孕妇71例(先兆早产组),均应用经会阴超声测量宫颈长度,随访观察2组妊娠结局,分析宫颈长度与早产的关系。结果正常组均足月顺利分娩,先兆早产组45例足月分娩,26例早产;正常组宫颈长度为(38.9±6.7)mm、先兆早产组足月分娩者和早产者分别为(34.8±8.1)、(25.4±9.2)mm,三者两两比较差异均有统计学意义(P<0.01);随宫颈长度缩短,其预测早产的特异度及阳性预测值增高,宫颈>30mm以上灵敏度明显降低;宫颈长度≤30mm时预测早产的灵敏度为73.1%,特异度为68.9%。26例早产患者中,宫颈长度≤30mm者19例、>30~35mm者7例,差异有统计学意义(P<0.01)。结论经会阴超声测量宫颈长度方法简单、方便,宫颈越短早产风险越高,宫颈长度≤30mm可作为预测早产的指标。
Objective To investigate the clinical value of measuring the length of the cervix in the prediction of preterm labor by perineal ultrasonography. Methods 66 pregnant women (normal group) and 71 premature pregnant women (threatened premature labor group) were enrolled in this study. The cervical length was measured by perineal ultrasonography. The pregnancy outcome was observed after follow-up. The relationship between cervical length and The relationship between premature delivery. Results In the normal group, 45 cases were delivered in full term and 26 were premature in preterm labor group. The length of cervical in normal group was (38.9 ± 6.7) mm. The full-term preterm delivery group and preterm birth group were (34.8 ± 8.1) ), And (25.4 ± 9.2) mm, respectively (P <0.01). With the shortening of cervical length, the specificity and positive predictive value of predicting premature labor increased significantly, and the sensitivity of cervical> 30mm was significantly lower The sensitivity of predicting preterm labor when the length of cervical ≤30mm was 73.1% and the specificity was 68.9%. In 26 cases of preterm birth, there were 19 cases with cervical length ≤30 mm and 7 cases with> 30 ~ 35 mm, the difference was statistically significant (P <0.01). Conclusion The method of measuring the length of the cervix through the perineal ultrasound is simple and convenient. The shorter the risk of premature birth is, the shorter the cervical length is.