ТОМ 86, №4
K. Takayama, H. Yamamoto, and H. Shimokawa
The chronological development of underwater shock wave researches performed at the Shock Wave Research Center of the Institute of Fluid Science at the Tohoku University is presented. Firstly, the generation of planar underwater shock waves in shock tubes and their visualization by using the conventional shadowgraph and schlieren methods are described. Secondly, the generation of spherical underwater shock waves by exploding lead azide pellets weighing from several tens of micrograms to 100 mg which were ignited by irradiating with a Q-switched laser beam and their visualization by using double exposure holographic interferometry are presented. The initiation, propagation, reflection, focusing of underwater shock waves, and their interaction with various interfaces, in particular, with air bubbles are visualized quantitatively. Based on such a fundamental underwater shock wave research, the collaboration with the School of Medicine at the Tohoku University was started for developing a shock wave assisted therapeutic device which was named an extracorporeal shock wave lithotripter (ESWL). Miniature shock waves created by irradiation with Q-switched HO:YAG laser beams are studied, as applied to damaged dysfunctional nerve cells in the myocardium in a precisely controlled manner, and are effectively used to design a catheter for curing arrhythmia.
Автор: K. Takayama, H. Yamamoto, and H. Shimokawa
Ключевые слова: nderwater shock wave, medical application, water, silicon oil, microexplosion, double exposure holographic interferometry, high-speed video recording, ESWL, soft tissue dissection, arrhythmia
K. Takayama, H. Yamamoto, and H. Shimokawa. K. Takayama, H. Yamamoto, and H. Shimokawa // Инженерно-физический журнал. 2013. ТОМ 86, №4. С. 905.
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