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Taper sleeve type iso-radius contractor for cylindrical reticular stent

A technology of mesh stents and retractors, which can be used in human tubular structure devices, medical science, blood vessels, etc. It can solve problems such as distortion, failure to meet the design requirements of biomedical engineering, and non-isodiametric shrinkage of cylindrical mesh stents. , to achieve the effect of good interface performance

Inactive Publication Date: 2008-10-15
DALIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technology is a simple hand tool, which is easy to cause non-isometric shrinkage or distortion of the cylindrical mesh stent
Cannot meet the requirements of biomedical engineering design

Method used

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  • Taper sleeve type iso-radius contractor for cylindrical reticular stent
  • Taper sleeve type iso-radius contractor for cylindrical reticular stent
  • Taper sleeve type iso-radius contractor for cylindrical reticular stent

Examples

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Embodiment Construction

[0022] In this embodiment, the guide tapered track divided into 8 equal parts is taken as an example. The technical scheme and structural features of the tapered sleeve type cylindrical mesh support isometric shrinker are as follows: the tapered sleeve 1 is equipped with 8 guiding cone tracks, and the cone track is equipped with 8 fan-shaped blocks 3, the cone track, the fan-shaped block It is uniformly and precisely machined, and its external dimensions and center hole dimensions are all set within extremely small tolerances. Both sides of sector block 3 are provided with disc spring groove 12, and disc spring 11 is arranged in disc spring groove 12, and 8 sector blocks 3 under the effect of disc spring 11 force, fit on the taper sleeve guide rail all the time and slide. A push rod 4 and a push piston 5 are respectively arranged at its two ends. In order to ensure that the cylindrical mesh support is always in the center of the cylinder surrounded by 8 sector blocks during c...

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Abstract

The present invention relates to rack contractor, and is especially a conic sleeve type cylindrical netted isodiametric rack contractor. The conic sleeve type cylindrical netted isodiametric rack contractor includes conic sleeve with N equant guide conic tracks with sector block each, and driving unit connected to the conic sleeve, and the N guide conic tracks constitute one frustum with one large end and one small end. One conic mechanism with only radial force on the contracted rack is designed based on the mechanical features of cylindrical netted rack structure so as to alter the diameter continuously at will for isodiametric rack contraction.

Description

technical field [0001] The invention relates to a stent retractor, in particular to a tapered sleeve type cylindrical mesh stent isometric retractor. Background technique [0002] Human vascular diseases such as coronary artery stenosis, cerebrovascular embolism, and hemangioma have long been treated with drugs or traditional surgery. Since the introduction of biomedical engineering technology, various types of cylindrical mesh stents developed based on biomedical engineering science have been widely used in the treatment of the above diseases and have shown their superior efficacy. In the application of this biomedical engineering technology, an important key technology is to shrink the cylindrical mesh stent isometrically onto the balloon delivery system, so that the cylindrical mesh stent can be accurately delivered to the lesion by using the balloon delivery system, and Position it on the inner wall of the blood vessel. The success of this key technology has a very imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/00A61F2/06A61F2/48A61F2/00
Inventor 董何彦于祺昌王慧民
Owner DALIAN UNIV
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