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Low thrombogenic intracranial vascular woven stent and processing method thereof

A technology of intracranial blood vessels and braided wires, which is applied in the field of braided stents and their processing, can solve the problems of substandard surface treatment, easy breakage of metal wires, and decreased mechanical properties of stents, so as to achieve less metal surface defects and avoid Mechanical properties, avoiding a sharp drop in effect

Active Publication Date: 2021-01-01
ACCUMEDICAL BEIJING LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved in this disclosure are: on the one hand, patients are prone to thrombus after intracranial stent implantation; The surface treatment is not up to standard or over-treated, and the treated metal wire is easily broken, resulting in a serious decline in the mechanical properties of the stent

Method used

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  • Low thrombogenic intracranial vascular woven stent and processing method thereof
  • Low thrombogenic intracranial vascular woven stent and processing method thereof
  • Low thrombogenic intracranial vascular woven stent and processing method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0057] Such as figure 1 As shown, this embodiment is a braided stent for intracranial blood vessels after surface treatment. The stent is braided by cobalt-chromium alloy wire and platinum-based alloy developing wire, and a layer of dense chromium oxide passivation film is formed on the surface of the cobalt-chromium alloy wire ( The main component is Cr 2 o 3 ). The intracranial vascular braided stent includes a cylindrical tubular mesh structure body, and the mesh structure body includes several braided wires braided with each other to form a coherent mesh structure 3, and the braided wires include a warp thread 1 and a weft thread 2; Weaving points are formed after the wefts intersect, and the weaving points include positive weaving points 4 and reverse weaving points 5, wherein the weaving points at which the warp 1 position is pressed above the weft 2 are positive weaving points 4, and the warp 1 position is pressed below the weft 2 The weaving point is a reverse weavi...

Embodiment 2

[0059] Such as figure 2 As shown, this embodiment is a braided stent for intracranial blood vessels after surface treatment. The stent is braided by cobalt-chromium alloy wire and platinum-based alloy developing wire, and a layer of dense chromium oxide passivation film is formed on the surface of the cobalt-chromium alloy wire ( The main component is Cr 2 o 3 ). The intracranial vascular braided stent includes a cylindrical tubular mesh structure body, and the mesh structure body includes several braided wires braided with each other to form a coherent mesh structure 3, and the braided wires include a warp thread 1 and a weft thread 2; Weaving points are formed after the wefts intersect, and the weaving points include positive weaving points 4 and reverse weaving points 5, wherein the weaving points at which the warp 1 position is pressed above the weft 2 are positive weaving points 4, and the warp 1 position is pressed below the weft 2 The weaving points are anti-weaving...

Embodiment 3

[0061] Such as image 3 As shown, this embodiment is a braided stent for intracranial blood vessels after surface treatment. The stent is braided by cobalt-chromium alloy wire and platinum-based alloy developing wire, and a dense passivation film of chromium oxide is formed on the surface of the cobalt-chromium alloy wire. The intracranial vascular braided stent includes a cylindrical tubular mesh structure body, and the mesh structure body includes several braided wires braided with each other to form a coherent mesh structure 3, and the braided wires include a warp thread 1 and a weft thread 2; Weaving points are formed after the wefts intersect, and the weaving points include positive weaving points 4 and reverse weaving points 5, wherein the weaving points at which the warp 1 position is pressed above the weft 2 are positive weaving points 4, and the warp 1 position is pressed below the weft 2 The weaving point is a reverse weaving point 5, every two warp threads 1 form on...

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Abstract

The invention relates to a low thrombogenic intracranial vascular woven stent and a processing method thereof. The low thrombogenic intracranial vascular woven stent comprises a cylindrical tubular net-shaped structure body, wherein the net-shaped structure body comprises a plurality of woven wires which are woven with one another to form a coherent mesh structure (3), and the woven wires comprisewarp wires (1) and weft wires (2); the warp wires and the weft wires are intersected to form weaving points, and the weaving points comprise positive weaving points (4) and negative weaving points (5), wherein the weaving points, pressed above the weft wires (2), of the warp wires (1) are the positive weaving points (4), and the weaving points, pressed below the weft wires (2), of the warp wires(1) are the negative weaving points (5); and the woven wires are selected from one or more than two metal wires, and a heat treatment oxide layer is removed from the surface of at least one metal wire. The treatment method disclosed in the invention comprises the steps of corrosion treatment and passivation treatment, and the low thrombogenic intracranial vascular woven stent obtained through treatment of the treatment method is not prone to causing thrombus.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a braided low-thrombosis stent and a processing method thereof. Background technique [0002] Stroke, commonly known as cerebral apoplexy, including hemorrhagic stroke and ischemic stroke, is an extremely common life-threatening epidemic and the disease with the highest fatality rate in China. Intracranial aneurysms are the leading cause of hemorrhagic stroke, whereas intracranial arterial stenosis is the leading cause of ischemic stroke. Intracranial stent systems can be effective in the treatment of both diseases. [0003] The existing intracranial braided stents in the world have extremely thin wire size (the diameter of the traditional heart stent wire is 0.07-0.12mm, while the diameter of the intracranial stent wire basically does not exceed 0.06mm), and the use of memory wire braiding and other characteristics. Traditional intracranial braided stents are made of memory allo...

Claims

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Application Information

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IPC IPC(8): A61F2/90C23F1/16C23F1/32C23C22/48C23C22/78
CPCA61F2/90C23F1/16C23F1/32C23C22/48C23C22/78A61F2250/0098
Inventor 吕怡然
Owner ACCUMEDICAL BEIJING LTD
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