Sandmann W, Pernonneau P, Gisbertz K H, Ulrich B, Bournat J P, Xhaard M
Langenbecks Arch Chir. 1976;Suppl:157-62.
Velocity measurements were performed at the test bench, in dogs and in patients with pulsed ultrasound. A new zero crossing counter was used to measure the different frequencies of the doppler spectrum in real time. The ratio of the standard deviation of the radial mean velocity to the radial mean velocity expressed as a percentage proved to be a useful turbulence index to describe stability of flow.
在试验台上、对狗以及对患者使用脉冲超声进行了速度测量。采用一种新型过零计数器实时测量多普勒频谱的不同频率。径向平均速度的标准差与径向平均速度之比以百分比表示，结果证明它是描述血流稳定性的一个有用的湍流指数。
