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首页> 外文期刊>Journal of Clinical Ultrasound: JCU >Prenatal color Doppler sonographic evaluation of nuchal encirclement by the umbilical cord.
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Prenatal color Doppler sonographic evaluation of nuchal encirclement by the umbilical cord.

机译：脐带围产期彩色多普勒超声评价。

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摘要

PURPOSE: The aim of this study was to assess whether Doppler flow velocimetry of the fetal middle cerebral and umbilical arteries is affected by nuchal encirclement by the umbilical cord (nuchal cord) in the prenatal period. PATIENTS AND METHODS: The position of the fetal umbilical cord was assessed on color Doppler sonography in pregnant women who were referred to our radiology department between September 14, 1998, and January 14, 2000. Pulsatility and resistance indices and the ratio of peak systolic blood flow velocity to diastolic velocity of the umbilical arteries and middle cerebral arteries of all fetuses were prospectively obtained with Doppler flow velocimetry. The fetuses were categorized into 2 groups: group 1 consisted of fetuses without sonographic evidence of nuchal cord and group 2 of fetuses with sonographic evidence of nuchal cord. The results were statistically analyzed with independent-groups t test. A p value of less than 0.05 was considered significant. RESULTS: During the study period, 230 pregnant women underwent sonographic examination of the fetus, and 68 fetuses were delivered. The sonographic examinations were performed at 24-41 weeks' menstrual age. Of the 46 fetuses in group 1, 1 fetus had nuchal cord at delivery; of the 22 fetuses in group 2, 4 did not have nuchal cord at delivery. The sensitivity of color Doppler sonography in detecting nuchal cord was 95% (18 of 19 fetuses), the specificity was 92% (45 of 49), the negative predictive value was 98% (45 of 46), and the positive predictive value was 82% (18 of 22). No statistically significant differences in middle cerebral artery or umbilical artery Doppler flow velocimetry values were detected between the 2 groups. CONCLUSIONS: Color Doppler sonography is a sensitive and specific method of diagnosing nuchal cord, but fetal middle cerebral artery and umbilical artery Doppler flow velocimetry values are not affected by the presence of nuchal cord in the prenatal period.
机译：目的：本研究的目的是评估胎儿中脑和脐动脉的多普勒血流速度测定法是否在产前受到脐带（脐带）环绕术的影响。患者与方法：在1998年9月14日至2000年1月14日之间转诊至我们放射科的孕妇中，通过彩色多普勒超声检查评估了胎儿脐带的位置。搏动性和耐药性指标以及收缩期血峰值的比率用多普勒流速测速仪可预期地获得所有胎儿脐动脉和大脑中动脉舒张速度的流速。胎儿分为两类：第1组由无脐带超声检查证据的胎儿组成，第2组由有脐带超声检查证据的胎儿组成。使用独立组t检验对结果进行统计学分析。 P值小于0.05被认为是显着的。结果：在研究期间，对230名孕妇进行了胎儿超声检查，并分娩了68名胎儿。超声检查在月经24-41周龄进行。第一组的46胎中，有1胎在分娩时有脐带。第2组中的22胎中有4胎在分娩时没有脐带。彩色多普勒超声检查检测脐带的敏感性为95％（19胎中的18例），特异性为92％（49例中的45例），阴性预测值为98％（46例中的45例），阳性预测值为90％。 82％（22之18）。两组之间在大脑中动脉或脐动脉多普勒血流速度测量值上没有统计学上的显着差异。结论：彩色多普勒超声检查是诊断脐带的一种灵敏和特定的方法，但是胎儿中脑动脉和脐动脉多普勒血流速度测量值不受产前时期脐带的存在的影响。

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