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Intravascular cutting stent

An internal cutting and blood vessel technology, applied in the field of medical devices, can solve problems such as blood vessel blockage and severe stenosis, and achieve the effect of easy to deal with, easy to accept, and to increase the removal function.

Active Publication Date: 2022-02-08
陈宏涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is: how to solve the problem of severe stenosis, stubborn wall thrombus, plaque and semi-shedding vascular intima caused by traditional intravascular treatment devices. Blocking impotent technical problems

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Embodiment Construction

[0017] The following describes the use of an embodiment of the present invention with reference to the accompanying drawings to make its technical content clearer and easier to understand. The far end in the description is away from the operator, and the proximal end is close to the operator.

[0018] Such as Picture 1-1 As shown, the endovascular cutting stent involved in the present invention is made of memory alloy, has a certain self-expandability after heat setting, can be pressed into thin bundles and returns to a mesh tube structure after release. In this embodiment, the grids of the endovascular cutting stents are all diamond-shaped, and consist of the main stent 1 on the outer layer and the cutting stent 4 on the inner layer. The two sides of the main stent are open-loop structures, which are conducive to fully integrating with the vessel wall and solidifying the main stent. The middle is a closed-loop structure. The mesh line where the cutting window is located is t...

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Abstract

The invention discloses an intravascular cutting stent, and relates to the field of medical instruments. The intravascular cutting stent is made of a memory alloy material and is composed of an outer-layer main stent and an inner-layer cutting stent, open-loop structure grids are arranged on the two sides of the main stent, a closed-loop structure grid is arranged in the middle of the main stent, the near end of the main stent is connected with a push rod, a cutting window is formed in the main stent, and the inner edge of the cutting window is sharp; the cutting stent is a closed-loop structure grid, the longitudinal section is double-V-shaped, and the near end is welded at the root of the main stent; and a cutting head of the cutting stent is tightly attached to the main stent, the edge of the cutting stent is sharp, and the cutting stent can move back and forth in the main stent when a micro-catheter is released and the cutting stent is recycled. According to the intravascular cutting stent, the microcatheter drives the cutting stent to cut and remove neoplasms such as thrombus attached to the blood vessel wall and intima in a semi-falling state.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an intravascular therapeutic stent with a cutting function. Background technique [0002] Cerebral infarction is the most common disease in my country. It has the characteristics of high incidence, high prevalence, and high disability rate, and the incidence rate is increasing year by year. Among the existing treatment options, intravenous thrombolysis is the only proven effective drug treatment in the acute phase. However, intravenous thrombolysis has the risk of secondary bleeding, and the recanalization rate of infarction caused by large vessel occlusion is less than 10%, and the time window for intravenous thrombolysis is only 6 hours. Since the clinical application of mechanical opening technology, good results have been achieved. Mechanical opening is to determine the position of vascular occlusion according to angiography, and then send the microcatheter to the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/22A61F2/90A61F2/966
CPCA61B17/22A61F2/90A61F2/966A61B2017/22079A61B2017/22081A61B2017/22094
Inventor 陈宏涛
Owner 陈宏涛