Implanted medical device

Abstract

The invention discloses an implanted medical device, which comprises at least one circle of bare stent and at least one anchor thorn, wherein the bare stent comprises a plurality of wave-shaped sections which are connected end to end, and at least one end of at least one of the plurality of wave-shaped sections is bent to form the anchor thorn. According to the implanted medical device disclosed by the invention, the anchor thorn, which is one part of the wave-shaped sections, is excellent in rigidity and bending strength, the anchor thorn, which is prevented from falling off from the wave-shaped section, is good in stability, and the anchor thorn is relatively good in fatigue tolerance so as to avoid bending and breaking when exerted by biomechanical action inside the lumen of a human body. The wave-shaped sections are mutually fixedly connected and a selectable range of fixed connecting contact (contact area and contact length) is relatively slightly limited, so that a relatively large contact area can be achieved by a relatively long contact length; and the medical device is high in stability of fixed connection, simple in process and is relatively low in influence on the materials of the wave-shaped sections.

Description

technical field [0001] The invention relates to a medical device, in particular to an implanted medical device. Background technique [0002] Implantable medical devices, especially lumen-implanted medical devices, such as luminal stents, filters, aortic valves, etc., are generally fixed in the lumen by close contact with the lumen wall through radial support force after expansion. In order to avoid device displacement, at least one circle of bare support can be set in the device to enhance the friction between the device and the lumen wall. Furthermore, an anchor thorn can also be provided on the bare stent, and the anchor thorn penetrates into the wall of the lumen so that the device can be stably anchored in the lumen. [0003] For instruments made of metal, if the bare stent is formed by cutting a metal pipe, the anchor thorns can be formed by integral cutting while cutting the pattern of the bare stent. The preparation process of the anchor thorn is relatively simple ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an implanted medical device with an anchor for the poor fatigue resistance of the anchor on the bare stent and the defects that the anchor is easy to fall off from the bare stent in the prior art

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