A stent weaving method and a stent made by the method

Abstract

The invention discloses a bracket weaving method and a bracket made by the method. The method uses a cylindrical fixture, takes any position point as a reference as a starting point, and makes the wire alternately bend up and down along a diagonal direction through a positioning pin. Folding movement and winding movement up and down through the positioning pin along the direction of the circumferential dividing line, and through the crossing between the wires to form a woven net with a combination of benzene ring structure and rhombus structure. The vertical straight rods in the benzene ring structure are parallel to the axis of the stent. After the stent is released from the sheath to the human cavity, due to the existence of the vertical straight rods, compared with the prior art, the stent will not be shortened too much in the longitudinal direction. The point on the vertical straight rod is only subjected to the force along the axis of the stent, thereby reducing the transverse stretch of the whole stent and reducing the shortening rate of the stent.

Description

technical field [0001] The invention relates to a bracket braiding method and a bracket made by the method. Background technique [0002] Stents woven from materials with good flexibility and expansion properties are widely used in the medical field. They are mainly used to prevent narrowing of narrowed parts by expanding the diameter of various organs in the body and to make the flow of substances in the body more stable. Smooth, such as dilation of the digestive tract, dilation of extrahepatic bile ducts, etc. [0003] In the prior art, the above-mentioned stents are often braided in a zigzag shape, and the wires form a certain angle with the longitudinal axis of the stent. Therefore, when the stent is accommodated in the sheath, the wires are basically parallel to the longitudinal axis, and when the stent is pushed out of the sheath After outside the tube ( Figure 25 A schematic diagram of the force analysis of the wire is shown in , for easy distinction, Figure 25 The...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that each point on the wire weaving path of the medical stent in the prior art is subjected to a force along the axis of the stent, resulting in a high shortening rate of the stent and increasing the difficulty of accurate positioning of the stent, the present invention A stent weaving method and a stent made by the method are provided to solve the above problems

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