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Endovascular intervention stent

A vascular and annular body technology, applied in the field of endovascular interventional stents, can solve the problems of intimal hyperplasia and high vascular restenosis ratio, and achieve the effect of convenient separation

Inactive Publication Date: 2016-08-10
郭莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the permanent implantation of the stent, the stent as a foreign body will cause excessive hyperplasia of the intima, and the restenosis rate of the blood vessel is also quite high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An intravascular interventional stent, comprising a plurality of annular bodies and the plurality of connecting parts for connecting the annular bodies, the annular body has a plurality of cross tendon beams evenly distributed along the ring, and the connecting parts have a V shape Connecting rod, the end of the connecting rod has a square buckle for connecting the ring body, the connecting part and the ring body are covered with a coating,

[0027] The annular body is a titanium-based alloy material, and its element composition is (mass percentage): Cr 6%, Si 4%, Zn 6%, B 2%, V0.8%, Zr 0.8%, Bi 0.2%, Ag 0.3% , Mg0.1%, La 0.08%, Y 0.01%, Nb0.07%, the balance is Ti,

[0028] The connecting part is a copper-based alloy material, and its element composition is (mass percentage): Mg 16%, Ba 5%, Ni 3%, Nb1%, Ti 0.6%, Ca 0.4%, Ce 0.07%, Ag 0.07%, Fe0. 06%, Bi 0.02%, Co 0.03%; Pr 0.02%, the balance is Cu,

[0029] The coating includes: 100 parts of boron carbide, 60 parts of...

Embodiment 2

[0031] An intravascular interventional stent, comprising a plurality of annular bodies and the plurality of connecting parts for connecting the annular bodies, the annular body has a plurality of cross tendon beams evenly distributed along the ring, and the connecting parts have a V shape Connecting rod, the end of the connecting rod has a square buckle for connecting the ring body, the connecting part and the ring body are covered with a coating,

[0032] The annular body is a titanium-based alloy material, and its element composition is (mass percentage): Cr 7%, Si 5%, Zn 6%, B 1%, V0.8%, Zr 0.8%, Bi 0.3%, Ag 0.3% , Mg0.1%, La 0.09%, Y 0.01%, Nb0.07%, the balance is Ti,

[0033] The connecting part is a copper-based alloy material, and its element composition is (mass percentage): Mg 15%, Ba 6%, Ni 3%, Nb1%, Ti 0.6%, Ca 0.4%, Ce 0.08%, Ag 0.08%, Fe0. 05%, Bi 0.03%, Co 0.02%; Pr 0.02%, the balance is Cu,

[0034] The coating includes: 100 parts of boron carbide, 70 parts of...

Embodiment 3

[0036] An intravascular interventional stent, comprising a plurality of annular bodies and the plurality of connecting parts for connecting the annular bodies, the annular body has a plurality of cross tendon beams evenly distributed along the ring, and the connecting parts have a V shape Connecting rod, the end of the connecting rod has a square buckle for connecting the ring body, the connecting part and the ring body are covered with a coating,

[0037] The annular body is a titanium-based alloy material, and its element composition is (mass percentage): Cr 6.5%, Si 4.5%, Zn 5.5%, B1.5%, V 0.85%, Zr 0.75%, Bi 0.25%, Ag 0.25% , Mg0.15%, La 0.085%, Y 0.015%, Nb0.065%, the balance is Ti,

[0038]The connecting parts are copper-based alloy materials, and its element composition is (mass percentage): Mg 15.5%, Ba 5.5%, Ni2.5%, Nb 1.5%, Ti 0.65%, Ca 0.35%, Ce 0.075%, Ag 0.075%, Fe0.055%, Bi 0.025%, Co0.025%; Pr 0.025%, the balance is Cu,

[0039] The coating includes: 100 parts...

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Abstract

The invention relates to an endovascular intervention stent. The endovascular intervention stent comprises a plurality of annular bodies and a plurality of connecting parts, wherein the connecting parts are used for connecting the annular bodies; each annular body is provided with a plurality of crossing rib beams which are uniformly distributed along the corresponding annular bodya ring; each connecting part is provided with a V-shaped connecting rod; a square buckle is arranged at the end part of each connecting rod and is used for connecting the corresponding annular body; coating layers are coatedat the connecting parts and the annular bodies are coatedwithcoating layers. The endovascular intervention stent has the advantages that by adopting the splitting structure of the connecting parts and the annular bodies, the support property of the stent is guaranteed, the smoothness with blood vessels is also guaranteed, and the length is conveniently adjusted according to requirements; the annular bodies are made of titanium alloy, so that the strength requirement is met; the connecting parts are made of copper-based alloy, so that the certain elasticity and toughness are realized, and the shape stability is guaranteed.

Description

technical field [0001] The invention relates to an intravascular interventional stent, which belongs to the technical field of medical instruments. Background technique [0002] In 1977, the world's first percutaneous coronary intervention (PCI) was completed in Switzerland. This operation used a balloon to dilate the stenosis of the patient's left anterior descending artery, and achieved success. However, the restenosis rate of blood vessels after balloon dilation is high, exceeding 50%. The main reason is that after the blood vessel is dilated and the external force is removed, the blood vessel will elastically recoil. In the 1980s, vascular stents widely used in coronary arteries were invented, mainly metal vascular stents made of stainless steel, cobalt-chromium alloy or nickel-titanium alloy. After these stents are implanted in the body, they can provide a durable mechanical The support avoids the elastic retraction of blood vessels and reduces the restenosis rate of ...

Claims

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Application Information

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IPC IPC(8): A61F2/82A61L31/02A61L31/08A61L31/14
CPCA61F2/0077A61F2/82A61F2002/823A61F2210/00A61F2220/0025A61F2230/00A61L31/022A61L31/088A61L31/14
Inventor 孙三友
Owner 郭莹
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