目的：评估单脐动脉（SUA）患者与三血管索患者的脐动脉（UA）收缩期峰值速度（PSV）。
方法：进行前瞻性病例对照研究。UA血流测速仪是从具有SUA的胎儿和具有三个血管索的对照组获得的。测量PSV和搏动指数(PI)。比较患者特征的统计学差异，并为不同组构建线性回归模型。
结果：UA多普勒测速测量来自29例SUA患者和29例与胎龄匹配的对照。有和没有SUA的UAPI之间的差异是显着的（F=3.471；p=0.0379），显示SUA组的PI较低。然而,两组间PSV无显著统计学差异(F=0.149;p=0.86).
结论：与正常脐带患者相比，SUA患者的UA阻抗较低，PSV没有差异。
OBJECTIVE: To evaluate peak systolic velocity (PSV) in the umbilical artery (UA) among patients with single umbilical artery (SUA) as compared with patients with three vessel cords.
METHODS: A prospective
case-control study was performed. UA blood flow velocimetry was obtained from fetuses with SUA and from a control group with three vessel cord. PSV and pulsatility index (PI) were measured. Patients\' characteristics were compared for statistical differences and a linear regression model was constructed for the different groups.
RESULTS: UA Doppler velocimetry measurements were obtained from 29 patients with SUA and from 29 controls matched for gestational age. The differences between UA PI with and without SUA were significant (F = 3.471; p = 0.0379) showing a lower PI in the SUA group. However, no significant statistical difference was found in PSV between these two groups (F = 0.149; p = 0.86).
CONCLUSIONS: While the impedance in the UA of patients with a SUA was lower compared with patients with a normal umbilical cord, the PSV did not differ.
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