Correlation of impression depth of umbilical cord around neck with blood flow indexes of umbilical artery and fetus middle cerebral artery
10.13929/j.1003-3289.201702092
- VernacularTitle:脐带绕颈深度与胎儿大脑中动脉、脐动脉血流参数的相关性
- Author:
Fumei CHEN
;
Lihua WANG
- Keywords:
Ultrasonography,prenatal;
Middle cerebral artery;
Umbilical artery;
Umbilical cord around neck
- From:
Chinese Journal of Medical Imaging Technology
2017;33(9):1371-1375
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the correlation value between the impression depth of umbilical cord around neck and the blood flow indexes of middle cerebral artery (MCA) and umbilical artery (UA) in fetus.Methods Totally 139 late pregnancy fetuses of umbilical cord around neck and 28 normal fetuses were enrolled in the study.The systolic maximum velocity/diastolic minimum velocity (S/D),resistence index (RI),pulsatility index (PI) of MCA and UA in fetuses were measured by Doppler ultrasound,and the correlation of the pressure trace depth with MCA and UA blood flow parameters were analyzed.Results The pressure trace depth of umbilical cord around neck and the S/D,RI,PI of MCA were positively correlated (one round of umbilical cord around neck,r=0.32,0.32,0.35,two or more rounds of umbilical cord around neck,r=0.71,0.69,0.53,all P＜0.05).The pressure trace depth of umbilical cord around neck and the S/D,RI,PI of UA had no correlation.Compared with normal fetuses,the parameters of UA had no significant differences in fetuses with umbilical cord around neck (all P＞0.05).The S/D,RI,PI of MCA in fetuses with pressure trace depth ≥0.80 cm and fetuses with two or more rounds of umbilical cord around neck were higher than those of normal fetuses (all P＜0.05).Fetuses with two or more rounds of umbilical cord around neck had obviously increased cesarean rate compared with normal fetuses.Compared with normal fetuses,the fetuses with pressure trace depth ≥0.80 cm had increased abnormal fetal heart rate,prolonged labor time during the second stage (all P＜0.05).Conclusion In late pregnancy fetuses with umbilical cord around neck,the blood flow parameters of MCA are more sensitive than those of UA.The pressure trace depth ≥ 0.80 cm may lead to intrauterine fetal anoxia.
