Corleis R, Vorreuther R, Engelmann U, Schaarschmidt U, Morgenstern B
Department of Urology, University of Cologne, Germany.
Urol Res. 1996;24(3):167-70. doi: 10.1007/BF00304080.
Single electrohydraulic lithotripsy (EHL) discharges from a human ureter were analyzed with a mechanical high-speed motion analysis camera. We found a cavitation bubble, at 650 mJ, 4-11 mm in size, with a lifetime of 400-500 microseconds. Varying sizes and lifetimes were found using single-shot analysis, as well as in different shot-sequences. This supports similar observations by recent investigations of cavitation bubble size with high-shutter-speed videofilm, which have depicted events at shutter speeds of 4000/s, i.e., an approximate exposure time of 250 microseconds. Due to the occurrence of high-voltage interference from the EHL high-voltage generator, no other technical electronic event timing equipment has so far been available capable of mechanical high-speed film motion analysis, while at the same time avoiding high-voltage interference.
使用机械高速运动分析相机对来自人体输尿管的单次液电碎石术（EHL）放电进行了分析。我们发现，在能量为650毫焦时会产生一个空化气泡，其大小为4 - 11毫米，寿命为400 - 500微秒。通过单次分析以及在不同的脉冲序列中，发现了不同的大小和寿命。这支持了最近利用高快门速度视频胶片对空化气泡大小进行研究的类似观察结果，这些研究描绘了快门速度为4000/秒时的事件，即大约250微秒的曝光时间。由于液电碎石术高压发生器会产生高压干扰，到目前为止，还没有其他能够进行机械高速胶片运动分析同时又能避免高压干扰的技术电子事件计时设备。
