title: Development and performance evaluation of an electromagnetic-type shock wave generator for lipolysis.
abstract: 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.
authors: Department of Industrial Design, Far East University, No. 49, Zhonghua Road, Xinshi District, Tainan City 744, Taiwan.
authors: S M
authors: SM
authors: Liang
authors: Department of Aeronautics and Astronautics, National Cheng Kung University, No. 1, University Road, East District, Tainan City 701, Taiwan.
authors: M H
authors: MH
authors: Chang
authors: Department of Industrial Design, Far East University, No. 49, Zhonghua Road, Xinshi District, Tainan City 744, Taiwan.
authors: Z Y
authors: ZY
authors: Yang
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D055615:Electrical Equipment and Supplies; D055590:Electromagnetic Phenomena; D008066:Lipolysis; D011312:Pressure; D013552:Swine