Single wire for medical treatment tool, and medical treatment tool

Patent metadata

Field	Value
Publication number	US-2022015768-A1
Application number	US-202117488985-A
Country	US
Kind code	A1
Filing date	Sep 29, 2021
Priority date	Apr 2, 2019
Publication date	Jan 20, 2022
Grant date	—

Abstract

A single wire for a medical treatment tool, includes a main body portion formed from a material having an elastic limit stress equal to or more than 1400 MPa, a 0.2% yield strength equal to or mere than 2000 MPa, and a breaking stress equal to or more than 2100 MPa; and a locking portion formed at a distal end portion of the main body portion and being configured to lock the main body portion to the medical, treatment tool.

First claim

What is claimed is:

1 . A single wire for a medical treatment tool, comprising:
a main body portion formed from a material having an elastic limit stress equal to or more than 1400 MPa, a 0.2% yield strength equal to or more than 2000 MPa, and a breaking stress equal to or more than 2100 MPa; and a locking portion formed at a distal end portion of the main body portion and being configured to lock the main body portion to the medical treatment tool.

2 . The single wire for a medical treatment tool according to claim 1 , wherein the material forming the main body portion further has an elastic limit elongation equal to or more than 1.0%, and a breaking elongation equal to or more than 3.0%.

3 . The single wire for a medical treatment tool according to claim 1 , wherein the main body portion has a diameter equal to or less than 0.5 mm.

4 . The single wire for a medical treatment tool according to claim 1 , wherein the medical treatment tool is either of a clip, a pair of grasping forceps, a pair of biopsy forceps, or a papillotome knife.

5 . The single wire for a medical treatment tool according to claim 1 , wherein the main body portion of the single wire is formed by stainless steel that is reformed by at least one of a straightening process or a heat treatment.

6 . The single wire for a medical treatment tool according to claim 5 , wherein the stainless steel contains chromium in a mass ratio equal to or more than 16% and nickel in a mass ratio equal to or more than 6%.

7 . The single wire for a medical treatment tool according to claim 5 , wherein the stainless steel is formed from at least one of a group consisting from SUS301, SUS304, and SUS631.

8 . The single wire for a medical treatment tool according to claim 1 , wherein the main body portion of the single wire is formed by stainless steel that is reformed by a heat treatment after a straightening process.

9 . The single wire for a medical treatment tool according to claim 8 , wherein the stainless steel contains chromium in a mass ratio equal to or more than 16% and nickel in a mass ratio equal to or more than 6%.

10 . The single wire for a medical treatment tool according to claim 8 , wherein the stainless steel is formed from at least one of a group consisting from SUS301, SUS304, and SUS631.

11 . A medical treatment tool, comprising:
the single wire for a medical treatment tool according to claim 1 .

12 . A single wire for a medical treatment tool including a distal end function portion for performing medical treatment on living tissues, the single wire for a medical treatment tool comprising:
a distal end portion connected to the function portion; and a proximal end portion, wherein the single wire for a medical treatment tool is configured to transmit a rotation of the proximal end portion to the distal end portion, and the single wire is formed from a material having an elastic limit stress equal to or more than 1400 MPa, a 0.2% yield strength equal to or more than 2000 MPa, and a breaking stress equal to or more than 2100 MPa.

13 . A single wire for a medical treatment tool including a distal end function portion for performing medical treatment on living tissues, the single wire for a medical treatment tool comprising:
a distal end portion connected to the function portion, wherein a distal end portion of the single wire for a medical treatment tool is connected to the distal end function portion, and the single wire is formed from a material having an elastic limit stress equal to or more than 1400 MPa, a 0.2% yield strength equal to or more than 2000 MPa, and a breaking stress equal to or more than 2100 MPa.

Assignees

• Olympus Corp

Inventors

• Suda Nobuyuki
• Ito Hideyuki

Classifications

• A61B17/122

  Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)} · CPC title

• A61B2017/00725

  Calibration or performance testing · CPC title

• A61B17/1285 Primary

  for minimally invasive surgery · CPC title

• C21D9/52

  for wires; for strips {; for rods of unlimited length} · CPC title

• A61B17/1214 Primary

  Coils or wires · CPC title