Intravascular stent applied to interventional operation as well as use method, manufacturing method and manufacturing device of intravascular stent

Abstract

The invention provides an intravascular stent applied to interventional operation as well as a use method, a manufacturing method and a manufacturing device of the intravascular stent. The intravascular stent is formed by winding at least one nickel-titanium alloy wire and comprises a cylindrical body and convoluted round-angle parts, wherein the round-angle parts are arranged at the two ends of the body, the body is made from the nickel-titanium alloy wire in a positive-rotation and reverse-rotation staggered superposition manner and is formed by a group of rhombus-shaped grid units, each rhombus-shaped grid unit is formed by adjacent positively and reversely rotated nickel-titanium alloy wires in a surrounding manner, and a positive rotation and reverse rotation conversion part of each nickel-titanium alloy wire forms each of the convoluted round-angle parts at the two ends of the body. The intravascular stent applied to the interventional operation as well as the use method, the manufacturing method and the manufacturing device of the intravascular stent, which are disclosed by the invention, have the beneficial effects that the intravascular stent formed by winding one or more whole wires is not opened at a radial end, so that the radial rigidity and the axial flexibility of the intravascular stent are perfectly combined; and in addition, the resistance of radial pulsating load is mainly caused by the curvature of a metal wire, so that the fatigue safety of the intravascular stent is greatly improved due to the high radial resistance.

Description

technical field [0001] The invention relates to the technical field of minimally invasive medical devices, in particular to a vascular stent capable of arbitrarily adjusting the inner diameter and radial force used in interventional operations, and its use method, manufacturing method and manufacturing equipment. Background technique [0002] Compared with traditional peripheral vascular surgery, minimally invasive interventional surgery using stent therapy has less trauma and better effect, and has become the main method for the treatment of peripheral vascular stenosis. [0003] Existing vascular stents such as figure 1 As shown, it is generally made of laser-cut thin-walled metal tubes. Since the nodes of the intersecting metal tubes are relatively fixed, when the vascular stent is inserted into the blood vessel, its two ends will collapse inward, forming a relatively smaller The two bell mouths are similar to the shape of an hourglass, which will prevent the flow of blo...

AI Technical Summary

Problems solved by technology

[0003] Existing vascular stents such as figure 1 As shown, it is generally made of laser-cut thin-walled metal tubes. Since the nodes of the intersecting metal tubes are relatively fixed, when the vascular stent is inserted into the blood vessel, its two ends will collapse inward, forming a relatively smaller The two bell mouths are similar to the shape of an hourglass, which will prevent the flow of blood, and seriously cause the failure of the operation

[0004] In order to prevent the occurrence of the above situation, if figure 2 As shown, the existing vascular stents generally use metal wires to weave into a mesh shape, but due to the radial openings of the mesh structure, the radial rigidity of the vascular stent is relatively poor, and its durability is also relatively poor

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