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Temporary medicine carrying stent

A drug-carrying and stent-based technology, applied in the field of medical devices, can solve the problems of blocking blood flow, low drug volume, blocking arterial blood vessels, etc., and achieves the effects of good intimal hyperplasia, inhibition of intimal hyperplasia, and full absorption.

Pending Publication Date: 2021-04-09
SHANGHAI HOPE MEDICAL DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the first aspect, when the drug-coated balloon is opened in the artery to release the drug, it will block the artery and block the blood flow, which may cause ischemia in the downstream artery. Insufficient absorption of
The second aspect is that part of the drug will be washed away by the blood flow during the release of the balloon, so the actual amount of drug transferred to the blood vessel wall is low, and it is difficult to achieve the expected effect

Method used

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  • Temporary medicine carrying stent

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Embodiment Construction

[0017] The present invention will be further described below according to the accompanying drawings of the description:

[0018] Such as figure 1 As shown, the present invention consists of a cylindrical stent 1, a needle 2, a recovery device 3, a developing point 4 and a drug coating on the surface of the stent. The stent material is nickel-titanium alloy, and the nickel-titanium tube is cut by laser engraving process. Use a suitable mold to shape the bracket. The needle on the bracket is turned up 90° and then fixed, protruding outward by 2mm. The stent is formed by heat treatment, and the surface is sprayed with rapamycin drug coating.

[0019] The nickel-titanium alloy stent has superelasticity, can be pressed and held in the delivery sheath together with the balloon, pushed to the lesion during surgery, withdrawn the sheath, the stent expands and bounces off, sticks to the blood vessel wall, and the needle-like object on the surface penetrates In the blood vessel wall,...

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Abstract

The invention discloses a temporary medicine carrying stent. The stent is composed of a cylindrical stent body, a needle-shaped object outside the stent body, a medicine coating on the surface of the stent body and a stent recycling structure. When the temporary medicine carrying stent is in use, a blood vessel is opened by the stent, the needle-shaped object penetrates into the wall of the blood vessel, and the medicine can enter the intima media of cells along the needled holes and can be better absorbed by vascular smooth muscle cells, so that the effect of better inhibiting intimal hyperplasia is achieved.

Description

technical field [0001] The patent of the present invention relates to a medical device, specifically a temporary drug-loaded stent. Background technique [0002] Lower extremity arteriosclerosis obliterans is mainly due to the narrowing or occlusion of the arterial lumen caused by atherosclerosis, resulting in chronic ischemia of the lower extremities, with a series of clinical symptoms and signs, mainly manifested in early intermittent claudication, rest pain and tissue defects (ulcers and gangrene). When lower extremity arteriosclerosis obliterans is accompanied by diabetes, the degree of arteriosclerosis is more serious than that without diabetes, and the prognosis is also poor. As a minimally invasive method, endovascular treatment can be used as the first choice, especially when the patient is old and frail or has other diseases that cannot tolerate the trauma of arterial bypass surgery. [0003] Simple balloon dilatation was the conventional treatment in the past, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/91A61F2/966A61F2/97A61F2/958
CPCA61F2/91A61F2/958A61F2/966A61F2/97A61F2250/0067A61F2250/0098
Inventor 李虎黄兴龙丁峰
Owner SHANGHAI HOPE MEDICAL DEVICES CO LTD
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