Blood vessel covered stent and manufacturing method thereof

A stent-graft and blood vessel technology, applied in the field of vascular stent-graft and its production, can solve problems such as thrombosis and biocompatibility, and achieve the effect of preventing release accumulation and improving biocompatibility

Inactive Publication Date: 2010-01-13
LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nickel content in nickel-titanium alloy is relatively high, and nickel ions are released in the human body and easily accumulate in the human body, causing long-term biocompatibility problems, and at the same time causing inflammation or thrombosis

Method used

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  • Blood vessel covered stent and manufacturing method thereof
  • Blood vessel covered stent and manufacturing method thereof
  • Blood vessel covered stent and manufacturing method thereof

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0024] Such as figure 1 , figure 2 As shown, a vascular stent graft according to the present invention includes a nickel-titanium alloy skeleton 2 and an insulating film 4, the nickel-titanium alloy skeleton 2 is tubular, and the insulating film 4 is arranged on at least most of the nickel-titanium alloy skeleton 2 The tubular surface is used as the tube wall, and the insulating film 4 is used to prevent the blood in the vascular stent graft from penetrating through the tube wall, and forms a shielding layer 1 on the surface of the material constituting the nickel-titanium alloy skeleton 2 to prevent the release of nickel ions into the blood . The vascular stent graft made of nickel-titanium alloy material has good resilience and radial support. In the process of manufacturing the stent, the nickel-titanium alloy skeleton 2 is heat-treated and...

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Abstract

The invention relates to a blood vessel covered stent and a manufacturing method thereof. The blood vessel covered stent comprises a tubular nickel-titanium alloy framework and an isolation membrane; the isolation membrane is arranged on at least most tubular surface of the nickel-titanium alloy framework as a tube wall and used for preventing blood in the blood vessel covered stent from permeating through the tube wall; and a shielding layer for preventing nickel ions from releasing and entering into blood is formed on the surface of the material which forms the nickel-titanium alloy framework. The manufacturing method of the nickel-titanium alloy framework comprises the following steps: manufacturing the tubular nickel-titanium alloy framework with the shielding layer; and arranging the isolation membrane onto the tubular surface of the nickel-titanium alloy framework as the tube wall. In the blood vessel covered stent, the shielding layer is formed on the surface of the material forming the nickel-titanium alloy framework and can prevent the nickel ions from releasing and accumulating in a human body.

Description

technical field [0001] The invention relates to a vascular covered stent and a manufacturing method thereof, in particular to a vascular covered stent with a shielding layer for the aorta and a manufacturing method thereof. Background technique [0002] Among the existing treatment methods, the aortic aneurysm, which is extremely harmful to the human body, is mainly treated by endovascular exclusion. In the endovascular exclusion of aortic aneurysm, CT angiography and other imaging examinations are performed on patients with aortic aneurysm to obtain accurate data on the location of the aortic lesion, and then a stent graft of the corresponding size is selected based on this. During the operation, under X-ray fluoroscopy monitoring, the vascular stent-graft is sent to the position of the aortic lesion, and then the vascular stent-graft is released at the diseased blood vessel. The contact of the blood vessel wall isolates the blood from the aortic lesion, the blood flows th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/86A61F2/90A61L31/02
Inventor 王永胜张德元
Owner LIFETECH SCIENTIFIC (SHENZHEN) CO LTD
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