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Publication Number
US-12588800-B2
Publication Date
2026-03-31
Expiration Date
Abstract
Provided is an endoscope treatment tool including: a tubular distal-end member that is attached to the distal end of an endoscope; an outer sheath having a channel extending in a direction along a longitudinal axis of the endoscope; a treatment-tool body; a linear connector that connects the distal-end member and the treatment-tool body. The treatment-tool body includes a bendable long insertion portion that is inserted through the channel, a treatment portion with which treatment is performed, and a rotating member. The rotating member includes a through-hole that extends along a plane intersecting the longitudinal axis and through which the connector is inserted. When the treatment-tool body is pushed in the longitudinal direction, the connector guides the treatment portion along a locus centered on an axis intersecting a plane including the axis of the distal-end member and the axis of the channel.
Core Innovation
The invention relates to an endoscope treatment tool having a tubular distal-end member configured to be attached to a distal end of an endoscope, and a rotating member. The rotating member includes a first through-hole extending along a direction of a longitudinal axis of the distal-end member and a second through-hole extending along an axis perpendicular to the first through-hole axis, and a linear connector connects the distal-end member and the rotating member.
A treatment-tool body is inserted into and rotatably held by the first through-hole, where a part of the treatment-tool body is configured to perform treatment on living tissue. The rotating member is configured to move in a direction along the axis of the second through-hole relative to the linear connector inserted in the second through-hole, and the treatment-tool body includes a first portion and a second portion located distally relative to the first portion.
A distal end of the rotating member is configured to abut a proximal end of the second portion. The structure provides a guided relative movement of the treatment-tool body along an arc-shaped locus centered on an axis defined by the distal-end member and channel, while allowing rotation of the treatment-tool body and relative connector movement along the through-hole axis.
Claims Coverage
The independent claim contains the core inventive concept with structural limitations defining through-hole geometry, relative motion along a perpendicular axis, and treatment-tool body diameter and abutting relationships. Dependent claims further refine connector structure and rotating member geometry features.
Perpendicular through-hole rotating member coupled by a linear connector
The endoscope treatment tool includes a tubular distal-end member, a rotating member having a first through-hole extending along a direction of a longitudinal axis of the distal-end member and a second through-hole extending along an axis perpendicular to an axis of the first through-hole, and a linear connector connecting the distal-end member and the rotating member.
Treatment-tool body rotatably held in the first through-hole while rotating member moves along the second through-hole axis
The treatment-tool body is inserted into and rotatably held by the first through-hole and includes a part configured to perform treatment on living tissue, wherein the rotating member is configured to move in a direction along the axis of the second through-hole relative to the linear connector inserted in the second through-hole.
Diameter step and abutting interface between treatment-tool portions and rotating member
The treatment-tool body includes a first portion and a second portion located distally relative to the first portion, and a distal end of the rotating member is configured to abut a proximal end of the second portion.
Flexible linear connector
The linear connector is a flexible linear member.
Resin thread connector
The linear member is a resin thread.
Flat-surface section aligned with second through-hole
The rotating member includes a flat-surface section on a part of its outer circumferential surface that runs parallel to an axis of the second through-hole and to the longitudinal axis of the insertion portion.
Offset center axes between first through-hole and rotating member
The first through-hole and the rotating member have longitudinally extending center axes that are offset radially in a first direction relative to each other.
Distal-end member channel accommodating the proximal portion of the treatment-tool body
The distal-end member has a channel arranged proximally to accommodate a portion of the treatment tool body proximal to the first portion.
The claims center on a rotating member defined by first and second through-holes arranged along perpendicular axes, a linear connector connecting the distal-end member and rotating member, and relative movement of the rotating member along the second through-hole axis while the treatment-tool body remains rotatably held in the first through-hole. The claims additionally constrain treatment-tool body geometry and a distal abutting interface, and refine connector structure and rotating member exterior and geometry features.
Stated Advantages
Allows rotation of the treatment-tool body while permitting relative connector movement along the through-hole axis.
Prevents connector twisting/entanglement.
Stabilizes rotating member orientation via a flat-surface section contacting the cap.
Documented Applications
Endoscopic submucosal dissection (ESD) treatment using an endoscope treatment tool with a treatment-tool body configured to perform treatment on living tissue.
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