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Blood vessel support bracket with little tissue prolapsus after implantation

A vascular stent and implantation technology, applied in the directions of blood vessels, stents, and devices of human tubular structures, etc., can solve the problems of high local drug concentration, low local drug concentration, and uneven drug concentration on the blood vessel wall, etc. Reduce tissue prolapse phenomenon, reduce the effect of tissue prolapse

Inactive Publication Date: 2007-03-07
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the existing drug-coated stents are coated with drugs on the surface of ordinary bare stents, and the design of the stents does not fully consider the characteristics of drug loading. The problem of low drug concentrations

Method used

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  • Blood vessel support bracket with little tissue prolapsus after implantation
  • Blood vessel support bracket with little tissue prolapsus after implantation
  • Blood vessel support bracket with little tissue prolapsus after implantation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: As shown in Fig. 2, a new type of structural vascular stent, the stent is made of 316L medical stainless steel thin-walled microtubes carved into a network structure by laser. The mesh structure is formed by connecting 8 sets of support rings 10 through connecting rods 20 . The upper side of the support ring 10 is composed of three first unit waves 11 and three second unit waves 12 alternately; the lower side is composed of three third unit waves 13 and three fourth unit waves 14 alternately. The waveform of the first unit wave 11 is “ω” shape, and the wave height of the third unit wave 13 is smaller than that of the fourth unit wave 14 . The number of connecting rods 20 between adjacent supporting rings 10 is 3, and the connecting rods 20 are formed by connecting a straight section 21 with an "S"-shaped or reverse "S"-shaped curved section 22, and the peak connection point 32 is located at the peak arc 45-degree position point; the area of ​​all the grid...

Embodiment 2

[0023] Embodiment 2: As shown in FIG. 3 , a new type of structural vascular stent is composed of cobalt-chromium alloy L605 thin-walled microtubes carved into a network structure by laser. The mesh structure is composed of 8 sets of support rings 10 connected by connecting rods, and the upper side of the support rings 10 is composed of two groups consisting of one first unit wave 11 and two continuous second unit waves 12 alternately; The lower side of the support ring 10 is composed of two groups consisting of one first unit wave 11 and two third unit waves 13 alternately. The waveform of the first unit wave 1 is "ω"-shaped; the number of connecting rods 20 between adjacent support rings 10 is 2; The connection point 32 is located at the highest point of the wave crest; all grid windows of the bracket have equal areas.

Embodiment 3

[0024] Embodiment 3: As shown in FIG. 4 , a new type of structural vascular stent is composed of cobalt-chromium alloy L605 thin-walled microtubes carved into a network structure by laser. The network structure is composed of 9 sets of support rings 10 connected by connecting rods. The upper side of the support ring 10 is composed of 4 first unit waves 11 and 4 second unit waves 12 alternately; the lower side is composed of 4 third unit waves 12. The unit wave 13 and four fourth unit waves 14 are alternately formed. The waveform of the first unit wave 11 is “ω” shape, and the wave height of the third unit wave 13 is smaller than that of the fourth unit wave 14 . The number of connecting rods 20 between adjacent supporting rings 10 is 4, and each connecting rod 20 is formed by connecting a straight section 21 with an "S"-shaped or reverse "S"-shaped curved section 22, and the peak connection point 32 is located at the peak The highest position point; the area of ​​all the grid...

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Abstract

The invention relates to a blood vessel support with less drop organism after being planted into organism, used to treat blood vessel block in puncture shaping surgery. Wherein, said support can be used in heart blood vessel, and outer blood vessels, via thin micro tube and laser to be carved into network structure; and the invention is formed by several groups of wave support rings (10) connected by connecting rods (20); each support ring (10) is formed by 2-5 groups of unit waves; nearby support rings (10) are connected by 2-10 connecting rods; the invention can avoid the support rod interfere the clamping and expanding, to improve flexibility, and the drug coat will not form web and the drug density will be uniform.

Description

technical field [0001] The invention relates to an expandable vascular stent for percutaneous puncture angioplasty to treat vascular obstruction. The structural stent is applicable to peripheral blood vessels (such as intracranial arteries, etc.) in addition to cardiovascular, and belongs to the technical field of medical device manufacturing. Background technique [0002] Vascular stenting is a minimally invasive interventional treatment method. This method is to use the balloon catheter in the PTA (Percutaneous transluminal angioplasty) operation to send the stent into the narrowed blood vessel, and expand the stent while the balloon is expanding. , so as to achieve the purpose of dilating blood vessels. At present, the most typical vascular stent is made of metal microtubes by laser cutting, and the whole is a network-shaped tubular structure. When in use, under the supervision of medical imaging equipment, the stent is sent to the diseased part through the artery by us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82A61F2/06A61L27/04A61L27/50
Inventor 顾兴中易红倪中华汤文成
Owner SOUTHEAST UNIV
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