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多普勒超声观测Ａ组３０名健康非孕妇女、Ｂ组１４０名正常孕妇及Ｃ组１２例妊娠并输尿管结石孕妇肾内动脉血流指数（ＲＩ、ＰＩ、Ｓ／Ｄ）。结果：Ｂ组１０９名（１１８只肾）有肾积水；无论有无肾积水Ｂ组肾ＲＩ、ＰＩ、Ｓ／Ｄ值与Ａ组无显著差异（Ｐ＞０．０５），除Ｂ组４只积水肾ＲＩ＞０．７（３％）外，Ａ、Ｂ组肾ＲＩ均＜０．７，且Ａ、Ｂ组左、右侧肾ＲＩ差值均＜０．１；Ｂ组积水肾ＲＩ、ＰＩ、Ｓ／Ｄ值高低与肾积水程度及孕周无关（Ｐ＞０．０５）。Ｃ组输尿管梗阻侧肾ＲＩ、ＰＩ、Ｓ／Ｄ均显著高于Ａ、Ｂ组与对侧健肾（Ｐ＜０．００１），梗阻侧肾ＲＩ均＞０．７且与对侧健肾ＲＩ差值＞０．１。结果表明：多普勒超声观测肾动脉血流指数变化对诊断妊娠合并机械性输尿管梗阻有重要意义
Doppler ultrasound in 30 healthy pregnant women in group A, 140 normal pregnant women in group B and 12 pregnant women with pregnancy-induced ureteral calculi in group C were measured with RI, PI and S / D. Results: The hydronephrosis of 109 patients (118 kidneys) in group B had no significant difference (P> 0.05) 4, only hydronephrotic kidney RI> 0.7 (3%), the renal RI of group A and B were less than 0.7, and the difference of RI of left and right kidney of group A and B were less than 0.1 The levels of RI, PI and S / D in water kidney were not related to the level of hydronephrosis and gestational age (P> 0.05). The RI, PI and S / D in ureter obstruction group were significantly higher than those in group A and B (P <0.001), the RI in obstructive group was> 0.7 and contralateral kidney RI Difference> 0.1. The results show that: Doppler ultrasound observed renal artery blood flow index changes in the diagnosis of pregnancy with mechanical ureteral obstruction has important significance