Electromagnetic bifocal surge reflector

A bifocal and shock wave technology, applied in the field of medical devices, can solve the problems of inability to further enhance the effect of crushing stones and inability to generate shear force, and achieve the effect of simple structure, low cost and easy realization

Inactive Publication Date: 2004-03-17
THE AFFILIATED DRUM TOWER HOSPITAL MEDICAL SCHOOL OF NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the single-focus electromagnetic shock wave focusing lens cannot generate shear force, so it cannot further enhance the effect of lithotripsy, improve the efficiency of lithotripsy, and reduce the pain of patients.

Method used

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  • Electromagnetic bifocal surge reflector
  • Electromagnetic bifocal surge reflector
  • Electromagnetic bifocal surge reflector

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Embodiment Construction

[0014] Such as Figure 4 , Figure 5 , Image 6 , Figure 7 As shown, the shock wave generated by the same electrode high-voltage discharge source is sent from the first focal point F1 (incident point), and is on the concave surface 1 (hereinafter referred to as the main reflector 1) and the concave surface 2 (below) of the original concave focusing lens. The shock wave is focused on the respective focal points F2 and F3 on the secondary reflector 2). Since the distances of F2 and F3 are similar, the vertical distance is preferably designed at 5 mm to 15 mm; an overlapping area of ​​stress field is generated between the two focal points , generate shear force, and the stones in the overlapping area of ​​the stress field between the two focal points are quickly and easily crushed under the action of shear force.

[0015] The secondary reflector 2 is installed on the concave surface of the main reflector 1, the back shape of the secondary reflector 1 should match the curved s...

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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.

Description

technical field [0001] The invention relates to a medical device, in particular to a shock wave source reflector of an extracorporeal shock wave lithotripter. Background technique [0002] Before the present invention was made, the extracorporeal shock wave lithotripter had been widely used, and there was a focusing lens in the electromagnetic shock wave source lithotripter, and the focusing lens could be a concave mirror or a convex mirror, all of which were single focus, such as figure 1 , figure 2 shown. The mechanical mechanism of stone crushing is mainly due to the tension generated by the reflection of the incident shock wave entering the stone and the refraction of the shock wave passing through the stone, as well as a series of stress effects such as the pressure generated by the shock wave on the surrounding stone, so that the stone is crushed. Such as image 3 shown. [0003] However, this electromagnetic single-focus shock wave source only uses the tension ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/225G02B7/02
Inventor 孙西钊
Owner THE AFFILIATED DRUM TOWER HOSPITAL MEDICAL SCHOOL OF NANJING UNIV
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