A braided integrated vascular stent graft and preparation method thereof

A technology of covered stents and blood vessels, which is applied in the field of vascular covered stents and its preparation, can solve the problems of unfavorable long-term implantation, influence on nutrient delivery, small porosity and water permeability of the tube wall, and achieve simple procedures and avoid Uneven suture tension and easy processing

Active Publication Date: 2017-09-19
USHARE MEDICAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not describe the combination of PTFE and Nitinol stents
③A patent with the authorization number CN 2822554Y, a sutureless vascular stent graft that avoids displacement: This utility model patent relates to a sutureless double-sided coated vascular stent, and the double-layer coating is polytetrafluoroethylene The porosity and water permeability of the membrane and tube wall may be too small, which affects the delivery of nutrients and is not conducive to long-term implantation

Method used

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  • A braided integrated vascular stent graft and preparation method thereof
  • A braided integrated vascular stent graft and preparation method thereof
  • A braided integrated vascular stent graft and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, it is a three-dimensional schematic diagram of a braided integrally formed vascular stent graft. The braided integrally formed vascular stent graft includes polyester yarn 1 and heat-treated nickel-titanium alloy wire 2. The polyester yarn and The heat-treated nickel-titanium alloy wire is integrally formed to form a tubular braided structure. The polyester yarn is 50D polyester multifilament.

[0034] The preparation method of the above-mentioned braided integrated vascular stent graft is as follows:

[0035] Wrap a medical nickel-titanium alloy wire with a diameter of 0.05mm in the thread of a threaded rod with a small diameter of 3mm. The small diameter of the threaded rod is the same as the inner diameter of the vascular stent graft to be prepared. Place it at 400°C for 20 minutes after heat treatment and take it out. , together with the threaded rod, it is quenched with water at room temperature, and the cooled nickel-titanium alloy wir...

Embodiment 2

[0039] Such as figure 1 As shown, it is a three-dimensional schematic diagram of a braided integrally formed vascular stent graft. The braided integrally formed vascular stent graft includes polyester yarn 1 and heat-treated nickel-titanium alloy wire 2. The polyester yarn and The heat-treated nickel-titanium alloy wire is integrally formed to form a tubular braided structure. The polyester yarn is 75D polyester multifilament.

[0040] The preparation method of the above-mentioned braided integrated vascular stent graft is as follows:

[0041] Wrap a medical nickel-titanium alloy wire with a diameter of 0.1mm in the thread of a threaded rod with a small diameter of 10mm. The small diameter of the threaded rod is the same as the inner diameter of the stent graft to be prepared. Place it at 450°C for 20 minutes after heat treatment and take it out. , together with the threaded rod, it is quenched with water at room temperature, and the cooled nickel-titanium alloy wire is woun...

Embodiment 3

[0045] Such as figure 1 As shown, it is a three-dimensional schematic diagram of a braided integrally formed vascular stent graft. The braided integrally formed vascular stent graft includes polyester yarn 1 and heat-treated nickel-titanium alloy wire 2. The polyester yarn and The heat-treated nickel-titanium alloy wire is integrally formed to form a tubular braided structure. The polyester yarn is 300D polyester multifilament.

[0046] The preparation method of the above-mentioned braided integrated vascular stent graft is as follows:

[0047] Wrap a medical nickel-titanium alloy wire with a diameter of 0.2mm in the thread of a threaded rod with a small diameter of 20mm. The small diameter of the threaded rod is the same as the inner diameter of the vascular stent graft to be prepared. Place it at 500°C for 15 minutes after heat treatment and take it out. , together with the threaded rod, it is quenched with water at room temperature, and the cooled nickel-titanium alloy wi...

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Abstract

The invention provides a braided integrally formed blood vessel covered stent and a preparation method thereof. The braided integrally formed vascular stent graft is characterized in that it includes polyester yarn and heat-treated nickel-titanium alloy wire, and the polyester yarn and heat-treated nickel-titanium alloy wire are integrally formed to form a tubular braided structure. The vascular stent graft with an integrally formed tubular braided structure prepared by the invention has a simple process, can not only maintain its high radial support force and water permeability resistance, but also has good axial flexibility and compliance.

Description

technical field [0001] The invention relates to a vascular covered stent for minimally invasive interventional treatment of vascular diseases and a preparation method thereof, in particular, two heterogeneous materials with large differences—polyester yarn and nickel-titanium alloy wire are integrally formed. A tubular braided fabric belongs to the technical field of biomedical textile products. Background technique [0002] Arterial ectasia seriously affects human health. Although arterial dilatation is not a malignant tumor disease, as the tumor continues to expand, the gradually thinning and degenerated wall of the tumor will eventually rupture, resulting in sudden bleeding and death of the patient. With the aging of the population in our country, the incidence of arterial dilated diseases such as thoracoabdominal aortic aneurysm has been increasing year by year. [0003] Minimally invasive endovascular repair is an effective means for the treatment of aneurysm and othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L31/04A61L31/02D04C1/02D04C1/06A61F2/07
Inventor 王璐邹秋华林婧关颖关国平王富军
Owner USHARE MEDICAL INC
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