Medical device

Patent metadata

Field	Value
Publication number	US-2023233804-A1
Application number	US-202318129461-A
Country	US
Kind code	A1
Filing date	Mar 31, 2023
Priority date	Oct 12, 2020
Publication date	Jul 27, 2023
Grant date	—

Abstract

A medical device, which is formed in an elongated outer shape and has a distal end side configured to be inserted inside a body when in use, includes a magnetized member in which a magnetized portion containing magnetized martensitic stainless steel is formed in a portion of the distal end side.

First claim

What is claimed is:

1 . A medical device comprising:
a magnetized member comprising at least one magnetized portion containing magnetized martensitic stainless steel,
wherein:
the medical device has an elongated outer shape with a distal end side configured to be inserted inside a body, and
the magnetized member is provided in a portion of the distal end side of the medical device.

2 . The medical device according to claim 1 , wherein:
the magnetized member is a core shaft, and the magnetized portion is provided in a distal end portion of the core shaft.

3 . The medical device according to claim 1 , further comprising:
a coercive force layer covering at least a portion of a surface of the magnetized member, and containing a material with a higher coercive force than martensitic stainless steel, wherein the magnetized portion comprises the coercive force layer magnetized together with the magnetized member.

4 . The medical device according to claim 2 , further comprising:
a coercive force layer covering at least a portion of a surface of the magnetized member, and containing a material with a higher coercive force than martensitic stainless steel, wherein the magnetized portion comprises the coercive force layer magnetized together with the magnetized member.

5 . The medical device according to claim 1 , wherein:
the at least one magnetized portion comprises a plurality of magnetized portions, and the plurality of magnetized portions are spaced apart from each other in an axial direction of the medical device.

6 . The medical device according to claim 2 , wherein:
the at least one magnetized portion comprises a plurality of magnetized portions, and the plurality of magnetized portions are spaced apart from each other in an axial direction of the medical device.

7 . The medical device according to claim 3 , wherein:
the at least one magnetized portion comprises a plurality of magnetized portions, and the plurality of magnetized portions are spaced apart from each other in an axial direction of the medical device.

8 . The medical device according to claim 4 , wherein:
the at least one magnetized portion comprises a plurality of magnetized portions, and the plurality of magnetized portions are spaced apart from each other in an axial direction of the medical device.

9 . The medical device according to claim 5 , wherein
at least two magnetized portions among the plurality of magnetized portions have lines of magnetic force extending in different directions from each other.

10 . The medical device according to claim 6 , wherein
at least two magnetized portions among the plurality of magnetized portions have lines of magnetic force extending in different directions from each other.

11 . The medical device according to claim 7 , wherein
at least two magnetized portions among the plurality of magnetized portions have lines of magnetic force extending in different directions from each other.

12 . The medical device according to claim 8 , wherein
at least two magnetized portions among the plurality of magnetized portions have lines of magnetic force extending in different directions from each other.

13 . The medical device according to claim 5 , further comprising:
a bent portion at which the medical device is bent in a predetermined direction, the bent portion being provided at a distal end portion of the medical device,
wherein the plurality of magnetized portions comprises:
a first magnetized portion provided further toward the distal end side of the medical device than the bent portion, and
a second magnetized portion provided further toward a proximal end side of the medical device than the bent portion.

14 . The medical device according to claim 6 , further comprising:
a bent portion at which the medical device is bent in a predetermined direction, the bent portion being provided at a distal end portion of the medical device,
wherein the plurality of magnetized portions comprises:
a first magnetized portion provided further toward the distal end side of the medical device than the bent portion, and
a second magnetized portion provided further toward a proximal end side of the medical device than the bent portion.

15 . The medical device according to claim 7 , further comprising:
a bent portion at which the medical device is bent in a predetermined direction, the bent portion being provided at a distal end portion of the medical device,
wherein the plurality of magnetized portions comprises:
a first magnetized portion provided further toward the distal end side of the medical device than the bent portion, and
a second magnetized portion provided further toward a proximal end side of the medical device than the bent portion.

16 . The medical device according to claim 8 , further comprising:
a bent portion at which the medical device is bent in a predetermined direction, the bent portion being provided at a distal end portion of the medical device,
wherein the plurality of magnetized portions comprises:
a first magnetized portion provided further toward the distal end side of the medical device than the bent portion, and
a second magnetized portion provided further toward a proximal end side of the medical device than the bent portion.

17 . The medical device according to claim 13 , wherein
the first magnetized portion and the second magnetized portion have lines of magnetic force extending in different directions from each other.

18 . The medical device according to claim 14 , wherein
the first magnetized portion and the second magnetized portion have lines of magnetic force extending in different directions from each other.

19 . The medical device according to claim 15 , wherein
the first magnetized portion and the second magnetized portion have lines of magnetic force extending in different directions from each other.

20 . The medical device according to claim 1 , further comprising:
a pair of permanent magnets having lines of magnetic force extending in the same direction as the magnetized portion, and provided on both sides of the magnetized portion.

Assignees

• Asahi Intecc Co Ltd

Inventors

• Ishikawa Masatomo
• Oshima Fumiyoshi

Classifications

• C22C38/00

  Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title

• C21D2211/005

  Ferrite · CPC title

• C21D7/00

  Modifying the physical properties of iron or steel by deformation (apparatus for mechanical working of metal B21, B23, B24) · CPC title

• A61B34/20

  Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis · CPC title

• A61B2034/2065

  Tracking using image or pattern recognition · CPC title