Methods The S/d value, RI value of UA, MCA and RA blood flow of 112 fetus cases were detected with color Doppler among them there were 64 cases of normal pregnancy and 48 cases PIH.
方法应用多普勒超声技术检测112例胎儿的脐动脉、大脑中动脉、肾动脉血流的S/D值、RI值，其中正常妊娠64例，妊高征48例。
Methods Manifestation on two-dimensional images, blood flow velocities, RI and S/D ratio were observed respectively between the normal men and the patients, and statistical treatment was done.
方法正常组与病变组对比观察二维声像图表现、血流信号的多少、血流速度、RI、S/D比值，并进行统计学处理。
The group of severe preeclampsia SRA PI, RI and S/D values than the control group and the mild and moderate PIH group were significantly higher, the difference was significant(P<0.01).
⑶重度子痫前期组SRAPI、RI和S/D值较对照组及轻度妊高征组、轻度子痫前期组均明显升高，具有显著性差异（P〈0.01）。
The group of severe preeclampsia SRA PI, RI and S/D values than the control group and the mild and moderate PIH group were significantly higher, the difference was significant(P<0.01).
⑶重度子痫前期组SRAPI、RI和S/D值较对照组及轻度妊高征组、轻度子痫前期组均明显升高，具有显著性差异（P〈0.01）。
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