Mani, Inc.

Shinichi Akutsu

Takashi Ishida

Kanji Matsutani

Masaaki Matsutani

Yoshimasa Tochimura

Motoichi Sugino

Masato Mizui

Masayuki Watanabe

A medical suture needle made of stainless steel includes a cutting blade component and a body part continuing to the cutting blade component. The cutting blade component, whose degree of thickness decreases from the body part to a sharp point, includes a first cutting blade part and a second cutting blade part continuing from the first cutting blade part. The first cutting blade part includes two first slanted surfaces formed sandwiching an apex and a first bottom surface sandwiched by the two first slanted surfaces. Cutting blades are formed at an edge constituting the apex and at edges where the first bottom surface and the two first slanted surfaces intersect. The second cutting blade part includes first slanted surfaces, second slanted surfaces having rims approximately parallel to the apex and formed on the respective first slanted surfaces, and a second bottom surface sandwiched by the second slanted surfaces.

Medical suture needle

Strength of a front end part having a sharp point of a medical suture needle is maintained and resistance when piercing tissue is reduced. There is provided a medical suture needle having a triangular cross section made of austenitic stainless steel having a fibrously extending structure, having two first slanted surfaces () ground and sandwiching a ridge (), and a bottom surface () sandwiched between the two first slanted surfaces and ground. The ridge is formed comprising a first cutting blade () that is formed by the two first slanted surfaces () intersecting, a ridge part () that is formed on a body part side of the first cutting blade without the first slanted surfaces () intersecting, and a second cutting blade () that is formed by two second slanted surfaces () ground, intersecting and sandwiching the first cutting blade () on a front end side of the first cutting blade (). Length Lof the first cutting blade is within a range of 3 to 20 times length Lof the second cutting blade (), and a front end () of the second cutting blade () is positioned deviating from the material center.

Suture needle

A suturing needle, comprising needle tip portion () having needle tip (), tapered portion () continuing to needle tip portion (), trunk portion () continuing to tapered portion (), and thread attaching portion () continuing to trunk portion (); needle tip portion () has circular section continuing to sharp needle tip (), angular section continuing to sharp needle tip (), circular section continuing to blunt needle tip () or angular section continuing to blunt needle tip (): wherein trunk portion () has the relations R&#x2267;R&#x2267;R, when peak () or joint portion between the two flat faces has diameter R, crest of ridges has a roundness of R, and a valley () has roundness R; and valley () is formed to correspond partially to peak (), and the thickness becomes continuously larger from tapered portion () to trunk portion ().

Suturing needle

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Utsunomiya, Japan

Shinichi Akutsu