# US 12,178,466 B2 · Medical device and treatment method for crushing object in body lumen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,466 B2 - Document ID: US12178466B2 - Status: Granted - Kind: B2 - Application number: 17/680,025 - Filed: 2022-02-24 - Published: 2022-07-28 - Granted: 2024-12-31 - Earliest claimed: 2016-03-09 - Assignees: Terumo Kabushiki Kaisha - Applicants: Terumo Kabushiki Kaisha - Inventors: Yuki Masubuchi; Masaomi Imai; Takashi Kitaoka; Takahiro Chida; Kazuaki Kanamoto; Yukitoshi Kato - Web page: https://patentgrep.com/patent/US12178466B2 ## CPC - A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - 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)} - A61B 17/3207: Atherectomy devices {working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions (A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016)} - A61B 17/320758: {with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002)} - A61B 17/320783: {through side-hole, e.g. sliding or rotating cutter inside catheter} - A61F 2/013: {Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting} - A61B 2017/22039: {eccentric} - A61B 2017/2212: {having a closed distal end, e.g. a loop} - A61B 2017/320716: {comprising means for preventing embolism by dislodged material} - A61B 2017/320733: {with a flexible cutting or scraping element, e.g. with a whip-like distal filament member} - A61B 2017/320775: {Morcellators, impeller or propeller like means} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A medical device for crushing an object in a body lumen, the medical device including: an elongated shaft portion rotatably driven; a crushing unit provided with bendable wire rods and rotatable together with the shaft portion; and a sliding unit fixed to each of end portion of the wire rods on at least one of a distal side of and a proximal side of the wire rods and is interlocked with the shaft portion so as to be slidable in an axial direction of the shaft portion. The shaft portion is provided with contact portions that come into contact with the sliding unit during rotation and limit relative rotation of the shaft portion and the sliding unit. After the sliding unit is attached to the contact portions, the sliding unit rotates in the same direction as the shaft portion along with the rotation of the shaft portion. ## Claims ### Claim 1 A medical device for crushing an object in a body lumen when inserted into the corresponding body lumen, the device comprising: an elongated shaft portion; a crushing unit located on the shaft portion and provided with a plurality of bendable wire rods; and a sliding unit fixed to end portions of the wire rods on at least one of a distal side or a proximal side thereof, the sliding unit being slidable in an axial direction of the shaft portion, wherein the sliding unit comprises a central sliding portion and an inner sliding portion provided radially inward of the central sliding portion, the central sliding portion including a first slit and a plurality of concave portions, the end portions of the wire rods being accommodated in the plurality of concave portions, the inner sliding portion including a second slit, and the first and second slits being aligned with one another to define a slit in an axial direction of the sliding unit. ### Claim 2 (depends on 1) The medical device according to claim 1, wherein an outer peripheral surface of the shaft portion and an inner peripheral surface of the sliding unit have a noncircular shape. ### Claim 3 (depends on 1) The medical device according to claim 1, further comprising a cover unit fixed to at least one part of an outer peripheral surface of the crushing unit. ### Claim 4 (depends on 1) The medical device according to claim 1, wherein the shaft portion includes a plurality of tubular bodies, and at least one of said plurality of tubular bodies is accommodated in the slit. ### Claim 5 (depends on 1) The medical device according to claim 1, wherein the central sliding portion is fixed to the inner sliding portion by an adhesive. ### Claim 6 A medical device for crushing an object in a body lumen when inserted into the corresponding body lumen, the device comprising: an elongated shaft portion; a crushing unit located on the shaft portion and provided with a plurality of bendable wire rods; and a sliding unit fixed to an end portion of the wire rods on at least one of a distal side or a proximal side thereof, the sliding unit being slidable in an axial direction of the shaft portion, wherein the sliding unit comprises a central sliding portion and an outer sliding portion provided radially outward of the central sliding portion, the central sliding portion including a first slit and a plurality of concave portions, the end portions of the wire rods being accommodated in the plurality of concave portions, the outer sliding portion including a second slit, and the first and second slits being aligned with one another to define a slit in an axial direction of the sliding unit. ### Claim 7 (depends on 6) The medical device according to claim 6, wherein an outer peripheral surface of the shaft portion and an inner peripheral surface of the sliding unit have a noncircular shape. ### Claim 8 (depends on 6) The medical device according to claim 6, further comprising a cover unit fixed to at least one part of an outer peripheral surface of the crushing unit. ### Claim 9 (depends on 6) The medical device according to claim 6, wherein the shaft portion includes a plurality of tubular bodies, and at least one of said plurality of tubular bodies is accommodated in the slit. ### Claim 10 (depends on 6) The medical device according to claim 6, wherein the central sliding portion is fixed to the outer sliding portion by an adhesive. ### Claim 11 A medical device for crushing an object in a body lumen when inserted into the corresponding body lumen, the device comprising: an elongated shaft portion; a crushing unit located on the shaft portion and provided with a plurality of bendable wire rods; and a sliding unit fixed to an end portion of the wire rods on at least one of a distal side or a proximal side thereof, the sliding unit being slidable in an axial direction of the shaft portion, wherein the sliding unit comprises a central sliding portion, an inner sliding portion provided radially inward of the central sliding portion, and an outer sliding portion provided radially outward of the central sliding portion, the central sliding portion including a first slit and a plurality of concave portions, the end portions of the wire rods being accommodated in the plurality of concave portions, the inner sliding portion including a second slit, the outer sliding portion including a third slit, and the first, second and third slits being aligned with one another to define a slit in an axial direction of the sliding unit. ### Claim 12 (depends on 11) The medical device according to claim 11, wherein an outer peripheral surface of the shaft portion and an inner peripheral surface of the sliding unit have a noncircular shape. ### Claim 13 (depends on 11) The medical device according to claim 11, further comprising a cover unit fixed to at least one part of an outer peripheral surface of the crushing unit. ### Claim 14 (depends on 11) The medical device according to claim 11, wherein the shaft portion includes a plurality of tubular bodies, and at least one of said plurality of tubular bodies is accommodated in the slit. ### Claim 15 (depends on 11) The medical device according to claim 11, wherein the central sliding portion is fixed to the inner sliding portion and the outer sliding portion by an adhesive.