Ligation apparatus

• US 8,690,899 B2
• Filed: 04/19/2011
• Issued: 04/08/2014
• Est. Priority Date: 12/24/2004
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation, Olympus Medical Systems Corporation (Olympus Corporation)
• Inventors: Kogiso, Junichi, Matsuno, Kiyotaka, Nakada, Mamoru, Murakami, Kazushi
• Primary Examiner(s): Tyson, Melanie
• Assistant Examiner(s): Scherbel, Todd J
• Application Number:
  US13/089,641
• Publication Number:
  US 20110196390A1
• Time in Patent Office: 1,085 Days
• Field of Search: 606/139, 606/142, 606/143, 606/151, 606/157, 606/158
• US Class Current: 606/151
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61B 17/1227 Spring clips
• CPC Class Codes: A61B 17/1285 for minimally invasive surgery
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter

Abstract

A ligation apparatus that ligatures living tissue using a clip and provides an optimal ligation apparatus for ligaturing living tissue in a body cavity. The ligation apparatus includes a clip with a clip claw member that is advanced and retreated relative to a pressing member to open and close, a sheath configured to accommodate the clip such that the clip claw member is not exposed to the outside, an advance and retreat restricting mechanism which restricts advance and retreat of the pressing member relative to the sheath at a distal end portion of the sheath and allows advance and retreat of the clip claw member relative to the pressing member according to advance and retreat of the operation wire relative to the sheath to allow the clip ligaturing living tissue, and a releasing mechanism which releases at least a portion of the clip when the clip ligatures the living tissue.

Claims

1. A ligation apparatus comprising:

a sheath including a distal end portion and a central axis;

a pressing member configured to engage with the distal end portion of the sheath and including a distal end and a proximal end;

a clip claw member which is provided at the pressing member, which is configured to be advanced and retreated relative to the pressing member and which includes relatively openable and closable ends protruding from the distal end of the pressing member;

an operation member inserted through the sheath, configured to be advanced and retreated relative to the sheath and including a distal end portion;

a connection member connecting the distal end portion of the operation member and the clip claw member to each other; and

an elastic member provided between the distal end and the proximal end of the pressing member configured to elastically deform based on the movement of an advance and a retreat of the elastic member along the central axis and configured to advance the clip claw member relative to the pressing member, the elastic member energizing the clip claw member so as to advance the clip claw member by an elastic deformation and so as to open the openable and closable ends of the clip claw member by an elastic force thereof, wherein the elastic member is provided separately from the clip claw member,

wherein;

the ligation apparatus is capable of re-grasping a living tissue a plurality of times at the openable and closable ends of the clip claw member,

the ligation apparatus grasping living tissue by the clip claw member pulling in the pressing member to resist energizing force of the elastic member so as to close the openable and closable ends of the clip claw member when the operation member and the connection member are pulled backwards relative to the pressing member along the central axis of the sheath, and

the ligation apparatus after grasping the living tissue by the openable and closable ends of the clip claw member, releasing the grasp of the living tissue with the clip claw member opening the openable and closable ends of the clip claw member protruded relative to the pressing member by an energizing force of the elastic member exerted when the pulling of the operation member and the connection member relative to the pressing member is released.

2. The ligation apparatus according to claim 1, wherein the elastic member is configured to produce a force for advancing the connection member relative to the pressing member.

3. The ligation apparatus according to claim 1, wherein the elastic member is a flat spring.

4. The ligation apparatus according to claim 1, wherein in the pressing member, a proximal end of the elastic member is on a further proximal side than the proximal end of the clip claw member.

5. The ligation apparatus according to claim 4, wherein the clip claw member is configured to be urged in a direction that the clip claw member expands in a radial direction and to open according to protrusion from the pressing member.

6. A ligation apparatus comprising:

a sheath including a distal end portion and a central axis;

a pressing member configured to engage with the distal end portion of the sheath and including a distal end and a proximal end;

a clip claw member which is provided at the pressing member, which is configured to be advanced and retreated relative to the pressing member and which includes relatively openable and closable ends protruding from the distal end of the pressing member;

an operation member inserted through the sheath, configured to be advanced and retreated relative to the sheath and including a distal end portion;

a connection member connecting the distal end portion of the operation member and the clip claw member to each other; and

an elastic member provided between the distal end and the proximal end of the pressing member, configured to elastically deform based on the movement of an advance and a retreat of the elastic member along the central axis and configured to advance the clip claw member relative to the pressing member, the elastic member energizing the clip claw member so as to advance the clip claw member by an elastic deformation and so as to open the openable and closable ends of the clip claw member by an elastic force thereof, wherein the elastic member is a coil spring, wherein;

the ligation apparatus is capable of re-grasping a living tissue a plurality of times at the openable and closable ends of the clip claw member, the ligation apparatus grasping living tissue by the clip claw member pulling in the pressing member to resist energizing force of the elastic member so as to close the openable and closable ends of the clip claw member when the operation member and the connection member are pulled backwards relative to the pressing member along the central axis of the sheath, and the ligation apparatus after grasping the living tissue by the openable and closable ends of the clip claw member, releasing the grasp of the living tissue with the clip claw member opening the openable and closable ends of the clip claw member protruded relative to the pressing member by an energizing force of the elastic member exerted when the pulling of the operation member and the connection member relative to the pressing member is released.