Liang S M, Chang M H, Yang Z Y
Department of Industrial Design, Far East University, No. 49, Zhonghua Road, Xinshi District, Tainan City 744, Taiwan.
Department of Aeronautics and Astronautics, National Cheng Kung University, No. 1, University Road, East District, Tainan City 701, Taiwan.
Rev Sci Instrum. 2014 Jan;85(1):015113. doi: 10.1063/1.4861178.
This study aims at the design and development of electromagnetic-type intermittent shock wave generation in a liquid. The shock wave generated is focused at a focal point through an acoustic lens. This hardware device mainly consists of a full-wave bridge rectifier, 6 capacitors, a spark gap, and a flat coil. A metal disk is mounted in a liquid-filled tube and is placed in close proximity to the flat coil. Due to the repulsive force existing between the coil and disk shock waves are generated, while an eddy current is induced in the metal disk. Some components and materials associated with the device are also described. By increasing the capacitance content to enhance electric energy level, a highly focused pressure can be achieved at the focal point through an acoustic lens in order to lyse fat tissue. Focused pressures were measured at the focal point and its vicinity for different operation voltages. The designed shock wave generator with an energy intensity of 0.0016 mJ/mm(2) (at 4 kV) and 2000 firings or higher energy intensities with 1000 firings is found to be able to disrupt pig fat tissue.
本研究旨在设计和开发一种在液体中产生电磁式间歇性冲击波的装置。所产生的冲击波通过声透镜聚焦于一个焦点。该硬件装置主要由一个全波桥式整流器、6个电容器、一个火花隙和一个扁平线圈组成。一个金属盘安装在一个充满液体的管子中，并放置在靠近扁平线圈的位置。由于线圈和盘之间存在排斥力，从而产生冲击波，同时在金属盘中感应出涡流。文中还描述了与该装置相关的一些部件和材料。通过增加电容含量以提高电能水平，可通过声透镜在焦点处实现高度聚焦的压力，从而溶解脂肪组织。针对不同的工作电压，在焦点及其附近测量了聚焦压力。已发现所设计的冲击波发生器在能量强度为0.0016 mJ/mm²（4 kV时）且有2000次放电，或能量强度更高且有1000次放电时，能够破坏猪脂肪组织。
