The changes of systolic peak velocity (VS), diastolic peak velocity (VD), mean glow velocity (VM), pulsatility index (PI) and resistent index (RI) of renal blood flow were observed.

• 并观测肾血流收缩期峰值流速(VS)，舒张末期峰值流速(VD)，平均流速(VM)，搏动指数(PI)及阻力指数(RI)的变化。