Shock-wave lithotripsy device and method

A shock wave and lithotripsy technology, applied in the field of medical devices, can solve the problems of vascular tissue damage, invariance, and decreased efficiency of lithotripsy
CN107569271APending Publication Date: 2018-01-12优超医疗科技(徐州)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
优超医疗科技(徐州)有限公司
Publication Date
2018-01-12

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Abstract

The invention discloses a shock-wave lithotripsy device and method. The device comprises a shock-wave generator and a focusing part; the focusing part is provided with a focusing surface and comprisesmultiple sub-focusing parts which can move between the folding position where the symmetry axis opposite to the focusing part is folded and the unfolding position where the symmetry axis opposite tothe focusing surface is unfolded, and when the multiple sub-focusing parts are located at the folding position, the shock wave generated by the shock-wave generator is focused by the focusing surfaceto the focus of the shock-wave lithotripsy device; when the multiple sub-focusing parts move from the folding position to the unfolding position, shock waves generated by the shock-wave generator arefocused by the focusing surface to new focuses of multiple lithotripsy devices. The device is simple in structure and convenient to operate, by changing the shock-wave focus position and sound field characteristics, along with the calculus breaking progress, the sound field is gradually changed to be the low pressure wide sound beam from the high pressure narrow sound beam, and then the calculus crushing efficiency is improved; in addition, vascular tissue damage is avoided.
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Description

technical field

[0001] The invention relates to the field of medical instruments, in particular to a shock wave lithotripsy device and a lithotripsy method. Background technique

[0002] Since its invention in the early 1980s, extracorporeal shock wave lithotripsy (SWL) has revolutionized the treatment of urolithiasis disease, becoming the main modality for fragmentation and comminution of clinical renal and ureteral stones. In vitro and in vivo kidney stone crushing experiments showed that the stones were broken and the stone fragments gradually became smaller due to the propagation of the stress wave in the stone. However, in the later stage of shock wave lithotripsy, the effectiveness of stress wave lithotripsy will be greatly hindered when the size of stone fragments is smaller than half the wavelength of the stress wave in the stone. As the total area of ​​stone fragments becomes larger, the width of the sound beam should also increase accordingly in order to continuou...

Claims

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