Guide wire holder

Patent metadata

Field	Value
Publication number	US-12201793-B2
Application number	US-202017112003-A
Country	US
Kind code	B2
Filing date	Dec 4, 2020
Priority date	Jul 20, 2018
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A guide wire holder includes a sheath having a lumen, an operation wire inserted into the lumen and configured to be able to advance and retract in the lumen, and a hook continuous with a distal end of the operation wire, being formed to be bent in a convex shape toward a distal side, and protrudes from a distal end of the sheath. The sheath has a side surface extending from the distal end of the sheath to a proximal end side in a direction of the longitudinal axis. The hook intersects a ridge line of the side surface and forms a closed region closed by the hook and the ridge line in a front view. The guide wire holder is configured to hold the guide wire located outside the sheath in the closed region in a state that the hook is disposed at a retracted position at which the hook is retracted.

First claim

What is claimed is:

1. A guide wire holder, comprising:
a sheath including a lumen, a central axis of the sheath extending along a longitudinal axis;
an operation wire configured to be inserted into the lumen and configured to advance and retract in the lumen along the longitudinal axis; and
a hook that is continuous with a distal end of the operation wire and protrudes from a distal end of the sheath,
wherein:
the sheath has a side surface that extends from the distal end of the sheath to a proximal side in a direction of the longitudinal axis,
the side surface includes a groove that is formed in a concave shape at a part of an outer periphery of the sheath,
the groove is recessed in a radial direction of the sheath so as to have a groove depth along the radial direction of the sheath and an opening formed between opposing surfaces of the sheath in a width direction orthogonal to the groove depth and orthogonal to the longitudinal axis, and
an opening width of the groove between the opposing surfaces of the sheath in the width direction widens from a bottom portion of the groove outwardly along the radial direction at least at a distal end portion of the sheath.

2. The guide wire holder according to claim 1 , wherein:
the hook is bent at a right angle with respect to the central axis of the lumen from a side view, and
the hook is configured to be able to capture the guide wire in a state in which the guide wire is arranged from the side surface toward the proximal end side of the sheath along the direction of the longitudinal axis.

3. The guide wire holder according to claim 1 , wherein:
the hook includes a first end portion that is connected to the distal end of the operation wire, and a second end portion which extends along the longitudinal axis toward a proximal end side of the sheath;
the hook is configured to be positioned in an advanced position and a retracted position;
the second end portion is spaced from the distal end of the sheath in the advanced position;
the second end portion intersects the distal end of the sheath in the retracted position;
the sheath includes a hook-accommodating lumen, the hook-accommodating lumen defining an inner diameter larger than an outer diameter of the second end portion,
the second end portion can fit in the hook-accommodating lumen by retracting the operation wire, and
when the second end portion is accommodated in the hook-accommodating lumen, the hook protrudes from the sheath and is configured to hold the guide wire between the side surface and a portion protruding from the sheath.

4. The guide wire holder according to claim 1 , wherein the side surface at a part of an outer periphery of a distal end surface of the sheath includes a cut out and the cut out extends from the distal end toward a proximal end of the sheath.

5. The guide wire holder according to claim 1 , wherein the hook and the side surface are disposed so that the guide wire is configured to advance and retract between the hook and the side surface.

6. The guide wire holder according to claim 1 , wherein the side surface which forms the groove is a curved surface.

7. The guide wire holder according to claim 1 , wherein the hook and the groove are disposed so that the guide wire is configured to advance and retract between the hook and the groove.

8. The guide wire holder according to claim 1 , wherein:
the sheath has inclined surfaces formed on both sides of the groove, and
the inclined surfaces incline from the distal end of the sheath toward a proximal side of the sheath.

9. The guide wire holder according to claim 1 , wherein, when the guide wire is held between the hook and the groove, at least a part of the hook does not contact a distal end of the groove.

10. The guide wire holder according to claim 1 , wherein the side surface is a flat surface.

11. The guide wire holder according to claim 1 , comprising a rotation-preventing portion including a restricting portion provided in at least a part of the lumen in the direction of the longitudinal axis and in which an opening shape of the lumen in a cross section orthogonal to the longitudinal axis is an elliptical, and a restricted portion which is provided in at least a part of the operation wire in an axis direction, has an elliptical cross-sectional shape orthogonal to the longitudinal axis and configured to advance and retract in the restricting portion, the rotation-preventing portion being configured so that a direction around the longitudinal axis of the operation wire is restricted.

12. The guide wire holder according to claim 11 , wherein:
the restricting portion is provided at a distal end portion of the lumen, and
a proximal end of the restricted portion is disposed in the lumen.

13. The guide wire holder according to claim 1 , wherein:
the hook extends to the distal end of the operation wire,
the sheath includes a restricting portion provided in at least a part of the lumen in the direction of the longitudinal axis and in which an opening shape of the lumen in a cross section orthogonal to the longitudinal axis is an elliptical,
the hook has a restricted portion formed by bending a rod-shaped member, and
rotation of the operation wire around the axis is restricted by locking the restricting portion to the restricted portion.

14. The guide wire holder according to claim 13 , wherein:
a distal end portion of the sheath has a pre-curved portion in which the longitudinal axis is curved,
a portion of the hook that fits in the lumen has a first portion which extends further toward a distal side than the restricted portion and a second portion which extends toward a proximal side further than the restricted portion,
the first portion is located further outward with respect to a curve of the pre-curved portion from the second portion, and
the second portion is located further inward with respect to the curve of the pre-curved portion from the first portion.

15. The guide wire holder according to claim 3 , wherein:
the distal end of the sheath has an inclined surface which is inclined from the proximal side toward the distal side in a tapered shape, and
the second end portion of the hook is folded back in a direction intersecting the longitudinal axis of the hook-accommodating lumen.

16. The guide wire holder according to claim 1 , wherein the hook is bent at an obtuse angle with respect to the central axis of the lumen from a side view.

17. The guide wire holder according to claim 1 , wherein:
the hook intersects a ridge line of the side surface and forms a closed region in a front view of the distal end of the sheath and the hook when viewed from a distal side to proximal side along the longitudinal axis, and
the guide wire holder is configured to hold guide wire located outside the sheath in the closed region in a state in which the hook is disposed at a retracted position.

18. The guide wire holder according to claim 17 , wherein:
when viewed from the front view, a boundary of the groove is the ridge line,
when viewed from the front view, the closed region is defined by a boundary of the hook and the ridge line, and
when viewed from the front view, the hook is curved toward the groove along the radial direction of the sheath.

19. The guide wire holder according to claim 1 , wherein:
the hook is curved to form a U-shape in a front view of the distal end of the hook when viewed from a distal side to proximal side along the longitudinal axis.

20. The guide wire holder according to claim 1

Assignees

• Olympus Corp

Inventors

• Suzuki Takahiro
• Katayama Tomofumi

Classifications

• A61M2025/09183

  having tools at the distal tip · CPC title

• A61M2025/015

  Details of the distal fixation of the movable mechanical means · CPC title

• A61F2002/041

  Bile ducts · CPC title

• A61F2/966

  with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod · CPC title

• A61M2210/1057

  Duodenum · CPC title