Treatment instrument

Patent metadata

Field	Value
Publication number	US-11638604-B2
Application number	US-201916515632-A
Country	US
Kind code	B2
Filing date	Jul 18, 2019
Priority date	Jan 18, 2017
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A treatment instrument includes a grasping piece that is openable and closable to a treatment portion, and includes an electrode member. An electrode inclination surface facing a side on which the treating portion is located is provided on an outer surface of the electrode member of the grasping piece, and the electrode inclination surface extends from an inner side to an outer side in a width direction so as to be inclined in a direction away from the treatment portion.

First claim

What is claimed is:

1. A treatment instrument comprising:
a rod that extends from a proximal side to a distal side in an extending direction, and includes, on the distal side, a treatment portion having electrical conductivity; and
a grasping piece that is openable and closable relative to the treatment portion, and includes an electrode member having electrical conductivity,
wherein:
the treatment instrument extends in: a longitudinal direction along the extending direction of the rod, a width direction orthogonal to the longitudinal direction, and a height direction that extends from a treatment portion side to a grasping piece side, the longitudinal direction and the height direction being orthogonal to each other and defining a virtual plane that is orthogonal to the width direction,
the treatment portion includes a rod outer surface that faces the grasping piece,
the rod outer surface includes:
a first rod inclination surface that is inclined with respect to the virtual plane so as to extend from a first end to a second end in a direction moving: (i) towards the grasping piece side in the height direction and (ii) inward in the width direction, the first end being on an outer side of the second end in the width direction, and the second end being closer to the grasping piece side in the height direction than the first end is to the grasping piece side in the height direction,
a second rod inclination surface that is inclined with respect to the virtual plane so as to extend from a first end to a second end in the direction moving: (i) towards the grasping piece side in the height direction and (ii) inward in the width direction, the first end being on an outer side of the second end in the width direction, and the second end being closer to the grasping piece side in the height direction than the first end is to the grasping piece side in the height direction, and
a rod intermediate surface that is provided between the first rod inclination surface and the second rod inclination surface in the width direction, and extends in the width direction,

the electrode member includes:
an electrode inclination surface that faces a side on which the treatment portion is located, and is inclined with respect to the virtual plane, the electrode inclination surface including:
a first electrode inclination surface provided on a side on which the first rod inclination surface is located with respect to a central position in the width direction, the first electrode inclination surface extending from a first end to a second end in a direction moving: (i) away from the treatment portion side in the height direction and (ii) outward in the width direction, the first end being on an inner side of the second end in the width direction, and being closer to the treatment portion side in the height direction than the second end is to the treatment portion side in the height direction, and
a second electrode inclination surface provided on a side on which the second rod inclination surface is located with respect to the central position in the width direction, the second electrode inclination surface extending from a first end to a second end in the direction moving (i) away from the treatment portion side in the height direction, and (ii) outward in the width direction, the first end being on an inner side of the second end in the width direction, and being closer to the treatment portion side in the height direction than the second end is to the treatment portion side in the height direction,

an electrode facing surface that is disposed between the first electrode inclination surface and the second electrode inclination surface in the width direction, and is inclined with respect to the virtual plane so as to extend from a first end to a second end in a direction moving: (i) towards the treatment portion side in the height direction and (ii) outward in the width direction, the first end being on an inner side of the second end in the width direction, and the second end being closer to the treatment portion side in the height direction than the first end is to the treatment portion side in the height direction, the electrode facing surface including:
a first electrode facing surface that faces the first rod inclination surface, and
a second electrode facing surface that faces the second rod inclination surface,

a first apex that is provided between the first electrode inclination surface and the first electrode facing surface in the width direction and faces the first rod inclination surface, and
a second apex that is provided between the second electrode inclination surface and the second electrode facing surface in the width direction and faces the second rod inclination surface, the first apex and the second apex each being a planar surface that extends along the width direction,

a first distance between the first apex and the second apex in the width direction is shorter than a second distance from the first end of the first rod inclination surface of the treatment portion to the first end of the second rod inclination surface of the treatment portion in the width direction,
the grasping piece includes a pad member that is provided between the first electrode facing surface and the second electrode facing surface in the width direction, and has electrical insulation, and
the pad member includes a pad abutment surface that abuts against the rod intermediate surface, and extends along the width direction.

2. The treatment instrument according to claim 1 , wherein:
the grasping piece further includes a support body that supports the electrode member,
the support body includes a side wall that is provided outside and adjacent to the electrode member in the width direction, and
a part or an entirety of the electrode inclination surface protrudes from the side wall in a direction toward the treatment portion.

3. The treatment instrument according to claim 1 , wherein in a state where a living tissue is grasped between the grasping piece and the treatment portion, a first region of the living tissue grasped between the first and second electrode facing surfaces and the first and second rod inclination surfaces is compressed at a high pressure compared to a second region of the living tissue that is in contact with the electrode inclination surface.

4. The treatment instrument according to claim 1 , wherein in a state where a living tissue is grasped between the grasping piece and the treatment portion, a distance between the first and second electrode facing surface and the first and second rod inclination surfaces, respectively, is shorter than a distance between the first and second electrode inclination surface and the first and second rod inclination surfaces, respectively.

5. The treatment instrument according to claim 1 , wherein the grasping piece is configured to move in a direction along the virtual plane.

6. The treatment instrument according to claim 5 , wherein the virtual plane passes through a central position in the width direction of the grasping piece.

7. The treatment instrument according to claim 1 , wherein:
the electrode member includes a base member and first and second side plates extending from the base member;
the first and second side plates are separated from each other in the width direction such that the pad member is disposed between the side plates; and
the first electrode inclination surface and the first electrode facing surface are disposed on the first side plate, and the second electrode inclination surface and the second electrode facing surface are disposed on the second side plate.

8. The treatment instrument according to claim 1 , wherein
when the grasping piece is closed relative to the treatment portion, each

Assignees

• Olympus Corp

Inventors

• Kobayashi Marina
• Hirai Yuji
• Murakami Eiji
• Kitayama Tadashi
• Miyajiri Satoshi
• Ide Katsushi
• Oshiro Takahito

Classifications

• A61B2017/320095

  with sealing or cauterizing means · CPC title

• A61B2018/00678

  upper · CPC title

• A61B2018/00607

  Coagulation and cutting with the same instrument · CPC title

• A61B2018/00845

  Frequency · CPC title

• A61B17/320092 Primary

  with additional movable means for clamping or cutting tissue, e.g. with a pivoting jaw · CPC title