Artery capturing and thrombus extraction stent and thrombus extraction device

An arterial and integrated technology, applied in the field of medical devices, can solve the problems of not being able to clearly observe the contact between the thrombus removal device and the thrombus, the location and shape of the thrombus, and poor clinical prognosis, so as to improve the capture rate of thrombus and improve clinical outcomes. Good prognosis, good for popularization and implementation

Pending Publication Date: 2018-07-13
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 capture rate of the thrombus
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 mo...

Method used

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  • Artery capturing and thrombus extraction stent and thrombus extraction device
  • Artery capturing and thrombus extraction stent and thrombus extraction device
  • Artery capturing and thrombus extraction stent and thrombus extraction device

Examples

Experimental program
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Effect test

Embodiment 1

[0043] see Figure 1-3, in the figure, the arterial capture plug stent of the present invention includes a mesh-shaped stent body 100 connected by a plurality of mesh holes 104. The stent body includes an integrally formed proximal end 101 and a middle body part 105 connected by a smooth transition. and the distal end 102, the stent body is folded under the action of external force, released and recovered after the external force is eliminated, in the released state, the proximal end of the stent body is a conical structure with a small diameter and a large diameter, the middle main part is a cylindrical structure, and the distal end is a tail Net-like structure with closed ends. The proximal end of the stent body is approximately triangular after being tiled and unfolded, the middle main body is approximately rectangular after being tiled and unfolded, and the distal end is in the shape of a hood. The proximal opening 103 of the stent body is in the shape of a shuttle.

[0...

Embodiment 2

[0047] Present embodiment figure is not drawn. The structure of the artery grabbing thrombus stent of this embodiment is similar to that of Example 1, and the structurally identical parts of the two will not be repeated here. The diameter gradually increases from the proximal end to the distal end, and the diameter of the material used gradually decreases from the proximal end to the distal end.

[0048] Compared with Embodiment 1, in this embodiment, the mesh of the stent body is designed to gradually become larger from the proximal end to the distal end, and the diameter of the material used is gradually reduced from the proximal end to the distal end, so that the surface of the stent body at different positions along the longitudinal direction The radial support force is adjustable, so it is suitable for removing thrombus in blood vessels with different diameters, especially for small blood vessel thrombus removal. Therefore, it is widely used and beneficial to popularizat...

Embodiment 3

[0050] see Figure 1-3 , in the figure, the structure of the arterial grabbing thrombus stent of this embodiment is similar to that of Example 1, and the same numbers in the figure represent the same meaning, which will not be repeated here. The mesh 104 is sequentially arranged with a plurality of developing marks 200 from the proximal end to the distal end of the stent body, so that the whole has developing properties. The developing marks are distributed continuously or at intervals along the mesh.

[0051] Compared with Embodiment 1, in this embodiment, a certain number of developing marking points are set on the thrombectomy bracket from the proximal end to the distal end, which effectively solves the problem of not being able to clearly observe the contact between the thrombus retrieval device and the thrombus during the thrombectomy process. As well as the technical problem that the position and shape of the thrombus cannot be clarified, thereby further improving the c...

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Abstract

The invention belongs to the technical field of medical devices and particularly relates to an artery capturing and thrombus extraction stent and a thrombus extraction device, wherein the thrombus extraction stent comprises a mesh-tube shaped stent body which is formed by connecting multiple meshes; the stent body comprises a proximal end, a middle main body part and a distal end which are integrally formed and are connected with one another in a smooth transition manner, folds under the action of an external force and the stent body is released and recovered after the external force is eliminated; the proximal end of the stent body is in an approximately triangular shape after being laid and spread; the middle main body part is in an approximately rectangular shape after being laid and spread; and the distal end is of a blast cap shaped structure after being laid and spread. When the stent body is in a releasing state, the proximal end is of a conical structure with smaller proximal portion and larger distal portion, the middle main body part is of a cylinder structure, and the distal end is of tuck net structure with closed tail end. The thrombus extraction device comprises the artery capturing and thrombus extraction stent and a push-pull guide wire; and the stent body can be recovered into a thrombus extraction micro-catheter under the action of the push-pull guide wire. The artery capturing and thrombus extraction stent and the thrombus extraction device provided by the invention can prevent thrombus from escaping, increases the thrombus capturing rate and thus improves clinical prognosis and the life quality of a patient.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an arterial grabbing thrombus bracket and a thrombus removal 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...

Claims

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Application Information

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IPC IPC(8): A61B17/22
CPCA61B17/22031A61B2017/22094A61B2017/22038A61B2017/22035
Inventor 宋朝阳朱良付马明李天晓冯光赵同源李钊硕杨博文
Owner 宋朝阳
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