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羊水过少是过期妊娠的常见现象。应用彩色多普勒检测57例过期妊娠(>41周妊娠)患者胎儿大脑中动脉、肾动脉和脐动脉的阻力指数,并用超声检查羊水指数对羊水量进行半定量检测,以探讨过期妊娠羊水过少患者脐血流及胎儿血流是否与羊水量正常者不同。 本研究中羊水过少(羊水指数<5cm)15例为研究组,羊水量正常者42例为对照组。结果羊水过少组三种阻力指数值及其比值与对照组无显著差异(两组脐动脉、大脑中动脉和肾动脉阻力指数分别为0.51±0.1对0.52±0.06、0.63±0.1对0.64±0.08、0.71±0.08对0.73±0.05);而新生儿平均出生体重明显低于对照组(分别为3297±438g和3742±448g,P 41 weeks of gestation) was detected by color Doppler. The amount of amniotic fluid was semi-quantitatively detected by ultrasound examination of amniotic fluid index in order to investigate the effect of amniotic fluid overdue pregnancy Less patients with umbilical blood flow and fetal blood flow is different with normal amniotic fluid. In this study, oligohydramnios (amniotic fluid index <5cm) 15 cases of the study group, 42 cases of normal amniotic fluid as a control group. Results There were no significant differences in the three indexes of resistance index and the ratio between the three groups in the control group (0.51 ± 0.1 vs. 0.52 ± 0.06,0.63 ± 0.1 vs 0.64 ± 0.08 , 0.71 ± 0.08 vs 0.73 ± 0.05), while the average newborn birth weight was significantly lower than that of the control group (3297 ± 438g and 3742 ± 448g, respectively, P <0.003). Excessive pregnancy oligohydramnios occurs when the poor prognosis of perinatal hair