二维超声测量肾脏的大小；多普勒流速曲线分析肾脏血流动力学的改变。

The sizes of kidneys were evaluated by two-dimensional ultrasound while the changes of hemodynamics were analyzed by Doppler velocity Tracing.

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目的探讨体外模拟心脏运动对多普勒血流流速曲线速度时间积分(VTI)测定的影响。

Objective To investigate the influence of simulated heart motion on the Doppler spectrum velocity - time integral (VTI) of simulated blood flow measurements through an in vitro model.

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方法：经颅多普勒超声测定血流速度，同步记录血压，改变血压，绘制脑血流自动调节曲线，并进行分类和确定自动调节的上、下限。

METHODS: The blood velocities and blood pressure was recorded simultaneously and the curves of CBFA were analyzed and classified into classical and non-classical pattern.

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