van Diik C C, Franx A, de Laat M W M, Bruinse H W, Visser G H A, Nikkels P G J
Department of Obstetrics, University Medical Center, Utrecht, The Netherlands.
J Matern Fetal Neonatal Med. 2002 Apr;11(4):280-3. doi: 10.1080/jmf.11.4.280.283.
To provide reference values for the umbilical coiling index in uncomplicated pregnancy.
Umbilical cords were collected from livebom singleton infants born after uncomplicated pregnancies. The umbilical coiling index (UCI) was calculated as the number of coils divided by the cord length in centimeters. The mean value (SD) for the UCI was calculated, and possible correlations of the UCI with maternal age, parity, gestational age at delivery, mode of delivery, sex and birth weight of the infant were examined.
A total of 122 umbilical cords were included. The frequency distribution of the UCI was skewed to the right. The mean (SD) UCI was 0.17 (0.009) coils/cm. There were no significant correlations of the UCI with maternal age, parity, gestational age at delivery, mode of delivery, sex or birth weight of the infant.
This is the first study to determine the UCI in a group exclusively consisting of uncomplicated pregnancies. The mean value that we found for the UCI may serve as the standard reference, allowing proper interpretation of umbilical coiling in complicated pregnancy.
为正常妊娠的脐带螺旋指数提供参考值。
收集正常妊娠后出生的活产单胎婴儿的脐带。脐带螺旋指数（UCI）计算为螺旋圈数除以脐带长度（厘米）。计算UCI的平均值（标准差），并检查UCI与母亲年龄、产次、分娩时孕周、分娩方式、婴儿性别和出生体重之间可能存在的相关性。
共纳入122条脐带。UCI的频率分布向右偏态。UCI的平均（标准差）值为0.17（0.009）圈/厘米。UCI与母亲年龄、产次、分娩时孕周、分娩方式、婴儿性别或出生体重之间无显著相关性。
这是第一项专门针对正常妊娠组确定UCI的研究。我们发现的UCI平均值可作为标准参考值，有助于对复杂妊娠中的脐带螺旋情况进行正确解读。
