Suture needle

Abstract

Provided is a suture needle configured so that the strength of the tip portion thereof where a sharp point is formed is ensured and so that resistance when the suture needle is passed through tissue is reduced. A suture needle having a triangular cross-section and consisting of austenite stainless steel having a structure elongated in a fiber-like form has two first sloped surfaces (11) which are ground and which have a ridge (20) therebetween; and one bottom surface (13) which is located between the two first sloped surfaces and which is ground. The ridge is formed to have a first cutting edge (1) which is formed by the two intersecting first sloped surfaces (11); a ridge section (20) which is located closer to a body than the first cutting edge and where the first sloped surfaces (11) do not intersect; and a second cutting edge (2) which is located closer to the front end side than the first cutting edge (1) and which is formed by two intersecting second sloped surfaces (12) which are ground, the two second sloped surfaces (12) being formed on both sides of the first cutting edge (1). The length L2 of the first cutting edge is in the range of three to twenty times the length L1 of the second cutting edge (2), and the tip (3) of the second cutting edge (2) is located at a position offset from the center of the material.

Description

technical field [0001] The present invention relates to a medical suturing needle with a triangular cross-section used in suturing living tissues, in particular to a medical suturing needle with small piercing resistance and high strength. Background technique [0002] With regard to medical suture needles, there are provided various kinds of suture needles having an optimal shape corresponding to a target suture site. Among them, there is a medical suture needle called a triangular needle having a blade having a sharp tip and a cutting edge continuous with the tip, and the blade has a triangular cross section. A general triangular needle is constituted to have: a blade portion whose thickness increases from the tip to the main body portion, and the blade portion is formed with a cutting edge at least at one ridge line; and a main body portion which is continuous with the blade portion. formed, to be held by the needle holder; and a base end (yuan end) portion, which is for...

AI Technical Summary

Problems solved by technology

[0012] Especially in the case of a triangular needle, if the increase rate of the thickness at the blade portion is reduced, the resistance when passing through the tissue can be reduced, but the following problem occurs: the sharp point formed at the end is inserted and Deforms easily when passing through tissue

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