Seamless stent and manufacturing method thereof

Abstract

The invention discloses a seamless stent and a manufacturing method of the seamless stent; the seamless stent is used for being intervened in a blood vessel and is formed by weaving at least one weaving thread; each weaving thread has an even number of free ends, and the free ends of the weaving thread are in butt joint in pairs; after being wound by the weaving threads, the stent has a cylindrical structure; all the free ends of each weaving thread are respectively provided with a cutting part; the cutting parts of every two free ends which are in butt joint are spliced in a seamless way, so that a splicing part is formed, and the diameter of the splicing part is equal to that of the corresponding weaving thread; a connecting pipe sleeves outside each splicing part; the inner walls of the connecting pipes are connected with the outer walls of the splicing parts in a seamless way. According to the seamless stent, the splicing parts formed by the free ends of the weaving threads are connected with the connecting pipes in a seamless way; the free ends of the weaving threads are provided with the cutting parts, and the diameters of the splicing parts formed by splicing the free ends are equal to those of the weaving threads, so that the diameters of the splicing parts are reduced, and the radial force and the axial force of the free ends are evenly distributed; the contact area among the free ends are enlarged by the cutting parts of the free ends, so that laser welding is conveniently carried out; the seamless stent is good in flexibility and excellent in attractiveness.

Description

technical field [0001] The invention relates to the field of minimally invasive medical devices, in particular to a seamless stent for intervening inside blood vessels and a manufacturing method. Background technique [0002] Peripheral vascular surgery is a traditional method for treating peripheral vascular stenosis. Compared with traditional peripheral vascular surgery, stent therapy is a minimally invasive interventional operation with less trauma, fewer complications, and better results. It has become the current treatment for peripheral vascular stenosis. main method. [0003] In the prior art, the bracket is made of braided wire, and there is no relevant limitation on the connection method of the free end of the braided wire. The connection method in the traditional stent is that the two free ends of the braided wire are facing each other and have a superimposed part juxtaposed together. A tube is sheathed on the superimposed part, so that the free ends are exposed t...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of traditional stents are that the free end is connected with a seam, and blood will seep into the gap, which will affect the service life of the stent; the diameter of the connecting part of the stent increases, resulting in uneven distribution of radial force and axial force at the free end of the stent; the softness of the stent Poor performance, and affect the aesthetics of the bracket

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