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目的 评价阴道超声监测宫颈对早产的预测价值。 方法 采用阴道超声对 5 2例先兆早产患者进行宫颈监测以预测保胎治疗后的妊娠结局。超声监测指标为 :宫颈长度、漏斗形成、漏斗长度、漏斗宽度及宫颈指数 [(漏斗长度 + 1) /宫颈长度 ]。 结果 5 2例先兆早产患者中 14例发生早产 ,早产的发生率为 2 6 .92 % (14/ 5 2 )。各项超声监测指标均与先兆早产预后显著相关 (P均 <0 .0 0 1) ,而宫颈长度是预测早产的最佳超声指标。制作 ROC曲线 ,结果显示宫颈长度 17mm为最佳临界值 ,预测早产的敏感性为 78.5 7% ,特异性为 86 .84% ,准确性为 84.6 2 %。 结论 应用阴道超声监测宫颈 ,可客观、准确地预测早产。
Objective To evaluate the predictive value of vaginal ultrasound for cervical premature labor. Methods Vaginal ultrasonography was performed on 52 patients with threatened preterm birth for cervical monitoring to predict the pregnancy outcome after tocolytic treatment. Ultrasound monitoring indicators: cervical length, funnel formation, funnel length, funnel width and cervical index [(funnel length + 1) / cervical length]. Results Fourteen of 52 preterm infants with preterm birth were premature, with a preterm birth rate of 26.92% (14/52). The ultrasound monitoring indicators were significantly associated with prognosis of threatened preterm labor (all P <0.001), while cervical length was the best ultrasound index for predicting preterm birth. The ROC curve was produced. The results showed that the cervical length of 17mm was the best cut-off value. The sensitivity of predicting preterm labor was 78.5%, the specificity was 86.84% and the accuracy was 84.6%. Conclusion The application of vaginal ultrasound monitoring of the cervix, objectively and accurately predict preterm birth.