Electroliquid bifocal surge reflector

A bifocal and shock wave technology, applied in the field of medical devices, can solve the problems of inability to generate shear force and further enhance the effect of crushing stones, and achieve the effect of simple structure, low cost and easy realization
CN1481760AInactive Publication Date: 2004-03-17THE AFFILIATED DRUM TOWER HOSPITAL MEDICAL SCHOOL OF NANJING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE AFFILIATED DRUM TOWER HOSPITAL MEDICAL SCHOOL OF NANJING UNIV
Publication Date
2004-03-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to one shock wave source reflector for extraneous calculus crusher. The present invention has secondary reflector set in partial surface of the primary reflector, and the shock wave emitted from the primary focus point is focused via the primary reflector and the secondary reflector onto two different near focus points to produce shearing force. The shearing force is used to crush calculus, which has lower shearing strength than tensile strength and compression strength. The present invention can result in effective calculus breaking and has simple structure and low cost.
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Description

technical field

[0001] The invention relates to a medical device, in particular to a shock wave source reflector of an extracorporeal impact lithotriptor. Background technique

[0002] Before the present invention was made, the extracorporeal impact lithotripter was widely used, and its electrohydraulic shock wave reflector was single-focus, that is, the shock wave was emitted from the first focal point F1, and the reflection of the concave surface of the metal semi-ellipsoid reflector was used. Focus the shock wave on the second focal point of the metal semi-ellipsoid reflector, and the stone is at this position, as shown in figure 1 shown. The mechanical mechanism of its lithotripsy is mainly the tension generated by the reflected wave when the incident shock wave enters the stone and the refracted wave when it passes through the stone, as well as a series of stress effects such as the pressure generated by the shock wave on the surrounding stone. And crushing stones, su...

Claims

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