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Series connection type thrombus extraction stent and thrombus extraction device

A tandem, stent-on technology, applied in the field of medical devices, can solve the problems of thrombus escape, few developing points, and damage to the vessel wall, etc., and achieve the effect of increasing the ability to capture thrombus, good clinical prognosis, and avoiding damage to the vessel wall

Pending Publication Date: 2018-10-19
宋朝阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as far as the mechanical thrombectomy device is concerned, there are still many problems in the process of thrombectomy: for example, most of the thrombectomy devices are designed with fewer development points, and the contact between the thrombectomy device and the thrombus cannot be clearly observed during the thrombectomy process. The position and shape of the thrombus cannot be clarified, resulting in a low thrombus capture rate and thrombus escape
And the existing device type is fixed, and the size of the stent mesh and the diameter of the nickel-titanium alloy wire that constitutes the stent are also fixed between different models and in the same stent, which will cause the radial support force to be fixed, which cannot adapt to the brain. The specific requirements of different diameters and different anatomical parts of blood vessels in the vascular system will lead to failure of thrombectomy and damage to the vessel wall
The focus and difficulty of this treatment method lies in the capture and capture of the thrombus by the thrombus retrieval device used in the operation and how to avoid the damage to the vessel wall during the operation, because the damage to the vessel wall will lead to the reocclusion of the vessel, thus making clinical poor prognosis

Method used

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  • Series connection type thrombus extraction stent and thrombus extraction device
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  • Series connection type thrombus extraction stent and thrombus extraction device

Examples

Experimental program
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Effect test

Embodiment 1

[0053] see figure 1 , in the figure, the tandem thrombectomy bracket of the present invention includes front and rear thrombectomy brackets connected in series along the same axis after release, wherein the front and back thrombectomy brackets all include a network tubular bracket connected by a plurality of mesh holes 204, 104 The main body 200, 100, the bracket main body is folded under the action of external force, released and recovered after the external force is removed. The overall length of the front thrombectomy bracket is less than or equal to the length of the rear thrombectomy bracket; and in the released state, the overall outer diameter of the front thrombectomy bracket is smaller than the overall inner diameter of the rear thrombectomy bracket.

[0054] Moreover, the stent body 100 included in the post-thrombosis retrieval stent includes a proximal end 101 and a distal end 102 that are integrally formed and connected through a smooth transition. In the released...

Embodiment 2

[0059] see Figure 1-4 , in the figure, the structure of this embodiment is similar to that of Embodiment 1, and the same numbers in the figure represent the same meaning, which will not be repeated here. The size of the mesh 104 on the thrombectomy bracket, and the material used for the back thrombectomy bracket is thinner than the front thrombectomy bracket material.

[0060] Compared with Embodiment 1, in this embodiment, in the released state, the mesh size on the front thrombectomy bracket is designed to be larger than the mesh size on the rear thrombectomy bracket, that is, the rear thrombectomy bracket is larger than the front thrombectomy bracket. It is denser, which can further prevent thrombus from escaping in the radial direction. Moreover, the material used for the rear thrombectomy bracket is thinner than that of the front thrombectomy bracket, and can be made into different specifications and models according to needs, that is, different mesh sizes and material ...

Embodiment 3

[0062] see Figure 1-4 , in the figure, the structure of this embodiment is similar to that of Embodiment 1. The same numbers in the figure represent the same meaning and will not be repeated here. A plurality of developing marks 300 are arranged sequentially from the proximal end to the distal end, so that the combined thrombectomy bracket has the overall visibility. In addition, the developing marks 300 are distributed continuously or at intervals along the mesh holes 104 and 204 .

[0063] Compared with Embodiment 1, this embodiment sets a certain number of development marking points on the front and rear thrombectomy brackets from the proximal end to the distal end, so that the combined thrombectomy bracket can be visualized as a whole, effectively solving the problem that neither Clearly observe the contact between the thrombus removal device and the thrombus, as well as the technical problems that cannot clarify the position and shape of the thrombus, thereby further im...

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Abstract

The invention belongs to the technical field of medical apparatuses and instruments and particularly relates to a series connection type thrombus extraction stent and a thrombus extraction device. Theseries connection type thrombus extraction stent comprises a front thrombus extraction stent and a back thrombus extraction stent which are serially connected along the same axis in a front-back wayafter being released, wherein each of the front thrombus extraction stent and the back thrombus extraction stent comprises a network tube shaped stent body formed by connecting multiple net holes, andthe stent bodies are closed up under the effect of an external force and are released for restoration after the external force disappears. The stent body included by the back thrombus extraction stent comprises a near end and a far end which are integrally formed and connected through smooth transition, the near end of the stent body in a released state is of a conical structure with a smaller near portion and a bigger far portion, and the far end is of a cylindrical structure. The stent body included by the front thrombus extraction stent comprises a near end, a middle main body portion anda far end which are integrally formed and connected through smooth transition, the near end of the stent body in a released state is of a conical structure with a smaller near portion and a bigger farportion, the middle main body portion is of a cylindrical structure, and the far end is a net bag shaped structure with a closed tail end. The overall outer diameter of the front thrombus extractionstent in the released state is smaller than the overall inner diameter of the back thrombus extraction stent. The series connection type thrombus extraction stent effectively extracts thrombus, prevents the thrombus from escaping, is high in thrombus extraction rate and good in clinical prognosis effect.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a tandem thrombus retrieval bracket and a thrombus retrieval device. Background technique [0002] Thrombus is a clot formed by blood in the heart of the cardiovascular system or on the surface of a blood vessel outside the heart under pathological conditions. It is generally composed of red blood cells, fibrin, platelets, and white blood cells in different proportions. Ischemic stroke caused by thrombosis in the cerebral vessels is a refractory disease that seriously endangers human health and life safety. According to statistics, there are 3 million stroke patients in China every year, and 1.2 million stroke patients die every year. At present, the number of stroke patients in my country is The incidence rate is increasing at an annual rate of 8.7%. The number of deaths due to stroke in China has surpassed tumors and cardiovascular diseases and has become the first cause...

Claims

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Application Information

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IPC IPC(8): A61B17/22
CPCA61B17/22031A61B2017/22094A61B2017/22038A61B2017/22035
Inventor 宋朝阳朱良付马英李天晓高不郎白卫星李立邵秋季
Owner 宋朝阳
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