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用彩色多普勒超声监测正常妊娠妇女４３例、妊高征孕妇３６例脐动脉血流，计算Ｓ／Ｄ值、脉搏指数（ＰＩ）、阻力指数（ＲＩ）。结果：正常妊娠时上述各指标随孕周的增加逐渐下降，表明胎盘为低循环阻力器官，其阻力随孕龄增加而下降。妊高征时各指标随妊娠进展而逐渐上升，当Ｓ／Ｄ＞２．８、ＰＩ＞１．７、ＲＩ＞０．７时胎儿窘迫发生率增加，围产儿异常结果占５３．１％（１９／３６），明显高于正常妊娠组的４．９％（２／４３）（Ｐ＜０．０５）。提示：对胎儿的脐动脉血流进行监测，可监护胎儿宫内状况并对妊娠结局有预测价值。
43 cases of normal pregnant women and 36 cases of pregnant women with PIH were monitored by color Doppler sonography, and the S / D value, pulse index (PI) and resistance index (RI) were calculated. Results: Normal pregnancy, the above indicators decreased with the increase of gestational age, indicating that the placenta is a low-circulating resistance organs, the resistance decreased with increasing gestational age. PIH gradually increased with the progress of pregnancy, when the S / D> 2.8, PI> 1.7, RI> 0.7, the incidence of fetal distress increased, abnormal results of perinatal children accounted for 53.1% ( 19/36), which was significantly higher than 4.9% (2/43) in normal pregnancy group (P <0.05). Tip: Monitoring of the umbilical artery blood flow of the fetus may monitor the intrauterine fetal status and predict the outcome of pregnancy.