彩超评估脐带旋转指数与脐带异常附着的相关性研究

目的：观察脐带旋转指数异常与脐带附着异常是否相关。方法：超声检测350例孕晚期胎儿的脐带旋转指数（1／A）。该指数为脐动脉围绕脐静脉旋转1个周期后占脐静脉的长度的倒数，指数小于0．1考虑为少旋转。分娩后测量脐带附着点到胎盘边缘的距离，将结果分为正常附着、边缘性附着和帆状附着。结果：少旋转组的胎儿脐带约有76．5％为异常附着，正常旋转或高旋转约有2．2％的脐带异常附着，胎儿脐带旋转指数与脐带附着点到胎盘边缘距离之间的相关系数为r=0．953。结论：脐带少旋转与脐带异常附着有显著相关性，若存在脐带少旋转则可提示存在脐带异常附着。

Ultrasonographic evaluation on the relationship between umbilical coiling index and umbilical cord insertion

Objective ：The aim of this study was to investigate the association between umbilical cord hypocoiling and abnormal placental insertion of the umbilical cord. Methods：Umbilical coiling was measured by sonography 350 cases in pregnant women in their second or third trimester an umbilical coiling index was defined as the reciprocal of one coiling length of the umbilical＇ cord.formulated as 1/A. The normal value 0.1 was Less than 0.1 was considered as hypocoiled. The distance from the placental edge to the insertion of the umbilical cord was measured after delivery and the resuhswere used to classify cord insertion as normal marginal or velamentous. Results =Cord insertion was ab- normal in 76.5~ of the fetuses with umbilical hypocoiling but in only 2.2G of those whose cord insertion was normal fetuses with umbilical hypocoiling. Conclusion..Hypocoiling of the umbilical cordwas highly associated with abnormal cord insertion the presence of a hypocoiled umbilical cord may indicate the presence of abnormal cord insertion and thusmay be useful for obstetric management.