Intracranial aneurysm blood flow guide support

A technology for intracranial aneurysms and guiding stents, applied in the field of medical devices, can solve problems such as increasing the difficulty of surgery, poor flexibility, shortening, etc., and achieve the effects of reducing the difficulty of release, reducing axial expansion, and slowing down flow and impact

Inactive Publication Date: 2020-11-13
FUDAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

In addition, because the blood flow steering stent is mostly made of braided structure, the release shortening rate is very high, that is, when the stent is released from a thinner catheter into a thicker parent artery, the length will be significantly shortened, which is not conducive to the stent’s The bonding of the parent artery increases the difficulty of the operation and puts forward higher requirements for the technique of the operator, which is not convenient for clinical promotion
[0006] To solve the problem of promoting thrombus formation in the aneurysm while avoiding the blockage of the blood flow of the parent artery and collateral vessels by the stent, some patents have been disclosed. For example, the patent CN 205391220 U discloses a dense mesh stent with holes, and the patent CN106491174 A discloses a retrievable blood flow guiding stent, and patent CN 108261217 A discloses a non-shortening blood flow guiding stent, but p

Method used

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  • Intracranial aneurysm blood flow guide support
  • Intracranial aneurysm blood flow guide support
  • Intracranial aneurysm blood flow guide support

Examples

Experimental program
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Effect test

Embodiment 2

[0042] Figure 7 It is the two-dimensional plane structure expansion diagram of Example 2. The design idea, function principle, release mode, size, and applicable aneurysm of Example 2 are all consistent with Example 1, the difference is that Example 2 is made by laser cutting. The diameter of the stent rod is 0.03mm-0.2mm, and the initial shape is cut out by laser cutting with nickel-titanium alloy pipe or plate, and then polished, acid-treated, and heat-set to make the final shape. The encrypted areas on both sides of the bracket are curled and overlapped to form a criss-cross mesh to achieve the effect of encryption. The stent as a whole has a plurality of development points, which is convenient for positioning under dynamic CT. Unlike Embodiment 1, Embodiment 2 determines the position of the encryption area of ​​the stent through 8 central development points 15 .

[0043] In summary, the present invention achieves local encryption at the neck of the aneurysm by curling th...

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Abstract

The invention relates to an intracranial aneurysm blood flow guide support. The guide support comprises a main body part and an encryption part, wherein the main body part is of a cylindrical structure which is formed by weaving stent wires manually or by a weaving machine and is provided with an overlapping part through curling and shaping, the encryption part is arranged at the overlapping partfor mesh encryption, and the overlapping part and the encryption part cover an aneurysm opening. By means of the structural design, normal blood circulation of nearby side branch blood vessels is keptwhile blood flowing into the aneurysm is blocked, and in addition, due to the fact that axial stretching and retracting are reduced when the stent is pressed and held, the release difficulty is lowered.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an intracranial aneurysm blood flow guiding stent. Background technique [0002] Intracranial aneurysm is a cerebrovascular disease with high disability rate and high fatality rate, and it is the main cause of subarachnoid hemorrhage. Intracranial aneurysms are abnormal protrusions at the weak points of intracranial blood vessels, which can be divided into cystic, fusiform and dissection according to morphology. Among them, saccular aneurysm is the most common, and it is more common in the bifurcation of aneurysm. There are two clinical methods for the treatment of intracranial aneurysms: surgical clipping and endovascular interventional therapy. Surgical operation has the advantages of low recurrence rate and low probability of complications, but the trauma is large and the recovery period is long, so it is not suitable for aneurysms in some complicated locations and p...

Claims

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Application Information

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IPC IPC(8): A61F2/91A61B17/12
CPCA61B17/12031A61B17/12118A61B17/12159A61B17/12168A61F2/91
Inventor 王盛章蔡云寒冯勇颜文涛
Owner FUDAN UNIV
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