Treatment device for endoscope

• US 20030139750A1
• Filed: 12/11/2002
• Published: 07/24/2003
• Est. Priority Date: 04/12/2001
• Status: Active Grant

• Current Assignee: Asahi Intecc Company Limited, Olympus Corporation
• Original Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Inventors: Matsumoto, Munechika, Shinozuka, Minoru, Kato, Tomihisa, Takahashi, Ichiro
• Granted Patent: US 8,157,811 B2
• Time in Patent Office: Days
• US Class Current: 606/113
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

There is disclosed a treatment device for an endoscope, comprising a treatment portion in which an operation wire is forward/backward moveably inserted into a main tube of an elongated flexible tube to be inserted into a body, a tip end of the operation wire forms a loop for treatment by itself in a projection state from the main tube, and the loop is adapted to be retractable and storable in the main tube, wherein the treatment portion is formed with a wire rope obtained by integrally intertwining a plurality of side strand wires with a core strand wire, and spiral convex or concave portions continuously disposed along the outer periphery of the wire rope are formed with the side strand wires.

Claims

1. A treatment device for an endoscope, comprising:

a treatment portion in which an operation wire is forward/backward moveably inserted into a main tube of an elongated flexible tube to be inserted into a body, a tip end of the operation wire forms a loop for treatment by itself in a projection state from the main tube, and the loop is adapted to be retractable and storable in the main tube,

wherein the treatment portion is formed with a wire rope obtained by integrally intertwining a plurality of side strand wires with a core strand wire, and spiral convex or concave portions continuously disposed along an outer periphery of the wire rope are formed with the side strand wires.

2. A treatment device for the endoscope according to claim 1, further comprising:

a combination of a large-diameter side strand wire and small-diameter side strand wire, wherein the large-diameter side strand wire forms the spiral convex portion.

3. A treatment device for the endoscope according to claim 1 wherein an empty space from which the side strand wire is omitted is formed into the spiral concave portion.

4. A treatment device for the endoscope according to claim 2 wherein the spiral convex portion is disposed only in a front half portion of the loop for treatment.

5. A treatment device for the endoscope according to claim 3 wherein the spiral concave portion is disposed only in a front half portion of the loop for treatment.

9. A treatment device for the endoscope according to any one of claims 1 to 5 and 8 wherein the wire rope is subjected to a diameter reduction wire drawing processing, and an edge-shaped end is formed in at least one strand wire in the outer periphery of the wire rope.

6. A treatment device for an endoscope, comprising:

a treatment portion in which an operation wire is forward/backward moveably inserted into a main tube of an elongated flexible tube to be inserted into a body, a tip end of the operation wire forms a loop for treatment by itself in a projection state from the main tube, and the loop is adapted to be retractable and storable in the main tube,

wherein the treatment portion is formed with a wire rope obtained by winding a side strand wire around a core strand wire, and a wave-form portion, which is formed by the core strand wire or the side strand wire, projects from an outer periphery of the wire rope, and has a circular-arc shape, is continuously disposed in a longitudinal direction of the wire rope.

7. A treatment device for the endoscope according to claim 6 wherein the wave-form portion projects only inside the loop for treatment.

8. A treatment device for an endoscope, comprising:

a treatment portion in which an operation wire is forward/backward moveably inserted into a main tube of an elongated flexible tube to be inserted into a body, a tip end of the operation wire forms a loop for treatment by itself in a projection state from the main tube, and the loop is adapted to be retractable and storable in the main tube,

wherein the treatment portion is formed with a wire rope obtained by integrally intertwining at least two strand wires having different outer diameters, and spiral convex or concave portions continuously disposed along an outer periphery of the wire rope are formed by the strand wires.