# US 2024/0197299 A1 · Endoscopic treatment tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0197299 A1 - Document ID: US20240197299A1 - Status: Published application - Kind: A1 - Application number: 18/538,371 - Filed: 2023-12-13 - Published: 2024-06-20 - Earliest claimed: 2022-12-14 - Assignees: Olympus Medical Systems Corp. - Applicants: Olympus Medical Systems Corp. - Inventors: Yusuke SHIOTA; Chika Miyajima; Junichi Kogiso; Yuya Hidaka; Naoki Takizawa - Web page: https://patentgrep.com/patent/US20240197299A1 ## CPC - A61B 17/00234: {for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)} - A61B 1/00131: {Accessories for endoscopes} - A61B 18/14: Probes or electrodes therefor - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 1/018: for receiving instruments - A61B 2017/00269: {endoscopic mucosal resection EMR} - A61B 2018/00601: {Cutting} - A61B 2018/1475: {Electrodes retractable in or deployable from a housing} - A61B 2217/007: with irrigation system - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An endoscopic treatment may include a sheath extending in a longitudinal direction, a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction. The treatment tool may further include an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole. The electrode including a rod extending in the longitudinal direction and configured to be arranged in at least a part of the first conduit. ## Claims ### Claim 1 An endoscopic treatment tool, comprising: a sheath extending in a longitudinal direction; a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction; an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole; and a rod extending in the longitudinal direction and configured to be arranged in at least a part of the first conduit. ### Claim 2 (depends on 1) The endoscopic treatment tool according to claim 1, wherein, when a distal end of the rod is located at a first position, at which a distal end opening of the first conduit is located, in the longitudinal direction, the distal end opening is sealed to prevent biological tissue from entering the first conduit through the distal end opening. ### Claim 3 (depends on 1) The endoscopic treatment tool according to claim 1, further comprising: a hollow operation wire having a second conduit communicating with the first conduit in the longitudinal direction, wherein the hollow operation wire includes a distal end connected to the electrode; and an operation unit configured to advance and retract the hollow operation wire in the longitudinal direction. ### Claim 4 (depends on 3) The endoscopic treatment tool according to claim 3, wherein the operation unit includes: a slider connected to a proximal end of the hollow operation wire and configured to advance and retract the electrode in the longitudinal direction; and a slide lever configured to advance and retract the rod relative to the electrode in the longitudinal direction. ### Claim 5 (depends on 4) The endoscopic treatment tool according to claim 4, wherein when the slide lever is moved in a distal direction along the longitudinal direction, the distal end of the rod is disposed in the longitudinal direction at a first position where a distal end opening of the first conduit is located to seal the distal end opening, and when the slide lever is moved in a proximal direction along the longitudinal direction, the distal end of the rod is disposed in the longitudinal direction at a second position closer to the proximal end than the distal end opening to open the distal end opening and enable water to flow through the first conduit. ### Claim 6 (depends on 1) The endoscopic treatment tool according to claim 1, wherein the rod extends to be movable forward and backward in the longitudinal direction. ### Claim 7 (depends on 6) The endoscopic treatment tool according to claim 6, wherein the rod includes: a support column part extending in the longitudinal direction; and a distal end part provided on a distal end side of the support column part and having an outer diameter larger than that of the support column part, wherein the distal end part is configured to move distally relative to a distal end opening of the first conduit. ### Claim 8 An endoscopic treatment tool, comprising: a sheath extending in a longitudinal direction; a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction; an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole; and a rod extending in the longitudinal direction and arranged in at least a part of the first conduit, wherein the rod includes: a support column part extending in the longitudinal direction; and a distal end part provided on a distal end side of the support column part and having an outer diameter larger than that of the support column part, wherein the distal end part is configured to move distally relative to a distal end opening of the first conduit. ### Claim 9 (depends on 8) The endoscopic treatment tool according to claim 8, further comprising: a hollow operation wire having a second conduit communicating with the first conduit in the longitudinal direction, wherein the hollow operation wire includes a distal end connected to the electrode; and an operation unit configured to advance and retract the hollow operation wire in the longitudinal direction. ### Claim 10 (depends on 9) The endoscopic treatment tool according to claim 9, wherein the operation unit includes: a slider connected to a proximal end of the hollow operation wire and configured to advance and retract the electrode in the longitudinal direction; and a slide lever configured to advance and retract the rod relative to the electrode in the longitudinal direction. ### Claim 11 (depends on 10) The endoscopic treatment tool according to claim 10, wherein when the slide lever is moved in a distal direction along the longitudinal direction, the distal end of the rod is disposed in the longitudinal direction at a first position where a distal end opening of the first conduit is located to seal the distal end opening, and when the slide lever is moved in a proximal direction along the longitudinal direction, the distal end of the rod is disposed in the longitudinal direction at a second position closer to the proximal end than the distal end opening to open the distal end opening and enable water to flow through the first conduit. ### Claim 12 (depends on 11) The endoscopic treatment tool according to claim 11, wherein the operation unit includes: a stopper configured to regulate movement of the slide lever so as to limit a position of the distal end of the rod within a range between a distal end opening of the first conduit and the proximal end of the electrode. ### Claim 13 (depends on 12) The endoscopic treatment tool according to claim 12, wherein the distal end part is configured to seal the distal end opening to prevent biological tissue from entering the first conduit through the distal end opening. ### Claim 14 (depends on 13) The endoscopic treatment tool according to claim 13, wherein, when the slide lever is located proximally relative to the stopper, the distal end of the rod is located within the first conduit. ### Claim 15 An endoscopic treatment tool, comprising: a sheath extending in a longitudinal direction; a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction; an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole; a rod extending in the longitudinal direction and configured to be arranged in at least a part of the first conduit, wherein the rod includes a plug that seals a distal end opening of the first conduit; a hollow operation wire having a second conduit communicating with the first conduit in the longitudinal direction, wherein the hollow operation wire includes a distal end connected to the electrode; and an operation unit configured to advance and retract the hollow operation wire in the longitudinal direction. ### Claim 16 (depends on 15) The endoscopic treatment tool according to claim 15, wherein the operation unit includes: a slider connected to a proximal end of the hollow operation wire and configured to advance and retract the electrode in the longitudinal direction; and a slide lever configured to advance and retract the rod relative to the electrode in the longitudinal direction. ### Claim 17 (depends on 16) The endoscopic treatment tool according to claim 16, wherein, the operation unit further includes a stopper configured to regulate advancement and retraction of the slide lever along the longitudinal direction, wherein the distal end of the rod is located within the first conduit when the slide lever is located proximally relative to the stopper, and wherein the slide lever further includes a positioning surface configured to generate a resistance force between the slide lever and the operation unit when the distal end of the rod protrudes from a distal end opening of the first conduit. ### Claim 18 (depends on 15) The endoscopic treatment tool according to claim 15, wherein the rod includes: a support column part extending in the longitudinal direction; a distal end part provided on a distal end side of the support column part and having an outer diameter larger than that of the support column part, wherein the distal end part is configured to move distally relative to a distal end opening of the first conduit; and a protrusion configured to remove biological tissue adhered to the first conduit. ### Claim 19 (depends on 18) The endoscopic treatment tool according to claim 18, wherein the distal end part is configured to seal the distal end opening to prevent biological tissue from entering the first conduit through the distal end opening. ### Claim 20 (depends on 17) The endoscopic treatment tool according to claim 17, wherein the operation unit includes: a stopper detachably attached to the operation unit and configured to regulate movement of the slide lever so as to limit a position of the distal end of the rod within a range between a distal end opening of the first conduit and the proximal end of the electrode, wherein, when the slide lever is located proximally relative to the stopper, the distal end of the rod is located within the first conduit, wherein when the stopper is attached to the operation unit, the rod is in a regulated state in which a range in which the distal end of the rod advances or retracts is limited to a range located between the distal end opening and the proximal end of the electrode, and wherein when the stopper is detached from the operation unit, the rod is in a protruding state in which the distal end of the rod protrudes distally relative to the distal end opening.