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A Method for Estimating Blood Flow by Velocity Profile Using Color Doppler Signals : Measurement of portal flow volume of children

使用彩色多普勒信号通过速度分布估计血流的方法：儿童门脉流量的测量

基本信息

批准号：
08670909
负责人：
NAKAMURA Michiru
金额：
$ 0.96万
依托单位：
Jichi Medical School (JMS)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08670909/
关键词：
ultrasonography portal vein flow volume children color Doppler flow velocity 門脈血流

项目摘要

Conventional estimation of blood flow volume has been done using pulsed Doppler method. This method is inaccurate, however, because it is often difficult to determine precise vessel diameter, and because it is not always appropriate to use the coefficient obtained from animal experiments. We developed a method for presenting a velocity profile of a blood flow by modifying an ordinary ultrasonographic apparatus to enable it to measure flow volume with color Doppler signals. In 1996 we used a phantom to examine the validity of the method. Results obtained correlated closely with those of the actual flow volume through the phantom. We also measured blood volume of femoral artery of a dog. Good correlation was found between the measurement values of the velocity profile method and electromagnetic one. In 1997 we observed the flow pattern of portal vein and measured portal flow volume in 100 normal children. Portal flow patterns changed with age and respiration, but volumes were not influenced by respiration or flow pattern. Portal flow volume measured by conventional method could not reflect the change of portal diameter, however, by our new method, portal diameter and flow volume were measured every moment to reflect the correct flow volume in any flow pattern.

传统的血流体积估计是使用脉冲多普勒方法进行的。然而，这种方法是不准确的，因为通常很难确定精确的血管直径，并且因为使用从动物实验中获得的系数并不总是合适的。我们开发了一种方法，通过修改一个普通的超声设备，使其能够测量与彩色多普勒信号的流量来呈现血流的速度分布。在1996年，我们使用了一个幻影，以检查该方法的有效性。获得的结果与通过体模的实际流量密切相关。同时测定了犬股动脉血容量。速度剖面法测量值与电磁法测量值之间具有良好的相关性。1997年对100例正常小儿门静脉血流进行了观察，并测定了门静脉血流量。门脉血流模式随年龄和呼吸而改变，但体积不受呼吸或血流模式的影响。传统方法测量的门静脉血流量不能反映门静脉直径的变化，而新方法可以随时测量门静脉直径和血流量，以准确反映任何流型下的血流量。