Film-covered woven body system for embolic arterial aneurysms

Abstract

The invention discloses a film-covered woven body system for embolic arterial aneurysms in the field of medical appliances. The film-covered woven body system comprises a meshed woven body and a delivery system connected with the woven body, the woven body is of a gourd-shaped double-layer spherical structure after being released, the bottom of the woven body is flat, and a connection part of the woven body and the delivery system is arranged inside the woven body, that is, the connection part is arranged not to protrude out of the woven body. The inner surface or the outer surface of the woven body is covered by a film. The film is made of polytetrafluoroethylene and the like and is arranged in one layer or a plurality of layers. Complete film coverage or partial film coverage can be adopted, but the bottom of the woven body needs be fully covered by the film. Compared with a woven body with no covering film, blood can be prevented more effectively from entering the arterial aneurysm to cause impact on the aneurysm wall. Effects can be improved along with increase of the number of film layers. Meanwhile, since the inner side of the woven body is covered by the film, meshes of the surface of the woven body can be made relatively sparse, the number of woven yarns for the woven body can be decreased, the size of the external contour can be reduced, and resistance in in-vivo delivery can also be reduced.

Description

technical field [0001] The present invention relates to a medical device, and more specifically, the present invention relates to a novel covering braid system for embolizing aneurysms. Background technique [0002] Aneurysm is a common vascular disease. Currently, regarding how to treat aneurysms, clinically foreign doctors have begun to use mesh braids to embolize aneurysms. [0003] The patent of Arturo et al. (CN 102014769 A) describes a braided aneurysm embolization device. However, due to its structural limitations, it is difficult to make the mesh on the surface of this device very dense, otherwise it will cause an excessively large outline and affect the conveying performance. However, if the mesh surface is not dense enough, it will affect the embolization effect of the aneurysm to a certain extent. [0004] In view of the above-mentioned deficiencies about the mesh braid, it is necessary to invent a more ideal device, which will not cause an excessively large ou...

AI Technical Summary

Problems solved by technology

However, due to its structural limitations, it is difficult to achieve a very dense mesh on the surface of this device, otherwise it will cause an excessively large outline and affect the conveying performance

However, if the surface is not dense enough, it will affect the embolization effect of the aneurysm to a certain extent.

[0004] In view of the above-mentioned deficiencies about the mesh braid, it is necessary to invent a more ideal device, which will not cause an excessively large outline, and can also improve the lack of curative effect caused by the insufficient density of the surface mesh.

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