# US 12,213,695 B2 · Medical device and treatment method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,695 B2 - Document ID: US12213695B2 - Status: Granted - Kind: B2 - Application number: 17/360,225 - Filed: 2021-06-28 - Published: 2021-10-21 - Granted: 2025-02-04 - Earliest claimed: 2014-11-04 - Assignees: Terumo Kabushiki Kaisha - Applicants: Terumo Kabushiki Kaisha - Inventors: Junichi Kobayashi; Tomonori Hatta; Taiga Nakano - Web page: https://patentgrep.com/patent/US12213695B2 ## CPC - 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 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - A61B 90/39: {Markers, e.g. radio-opaque or breast lesions markers} - A61F 2/013: {Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting} - 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 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 2017/320741: {for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy} - A61B 2017/320775: {Morcellators, impeller or propeller like means} - A61B 2090/3904: {specially adapted for marking specified tissue} - A61B 2090/3966: {Radiopaque markers visible in an X-ray image} - A61F 2002/016: {made from wire-like elements} - A61F 2002/018: {made from tubes or sheets of material, e.g. by etching or laser-cutting} - 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 treatment method and medical device are disclosed for cutting a substance inside a body lumen. The medical device includes a drive shaft that is rotatable; a cutting unit configured to be rotatably connected to a distal side of the drive shaft; a filter device configured to be inserted in a contracted state, the filter device having an elongated shaft, which interlocks with a filter portion of the filter device; a distal tube, the distal tube being on a distal side of the cutting unit and configured to receive the elongated shaft of the filter device; and a housing on a proximal portion of the drive shaft, the housing including a first drive gear connected to the drive shaft, a second drive gear connected to a motor and meshing with the first drive gear, and a first partition wall arranged between the motor and the second drive gear. ## Claims ### Claim 1 A medical device for cutting substances inside a body lumen, the medical device comprising: a drive shaft that is rotatable; a cutting unit configured to be rotatably connected to a distal side of the drive shaft; a linear motion shaft configured to adjust a deformation amount of the cutting unit; a filter device configured to be inserted in a contracted state into the body lumen, the filter device having an elongated shaft, which interlocks with a filter portion of the filter device; a distal tube, the distal tube being on a distal side of the cutting unit, and wherein the distal tube is configured to receive the elongated shaft of the filter device; a housing containing a motor; and a first drive gear connected to the drive shaft, a second drive gear connected to the motor via a rotary shaft and meshing with the first drive gear, a first partition wall arranged between the motor and the second drive gear, a second partition wall arranged proximal to the first partition wall, and wherein the rotary shaft fixed to the motor extends through the first partition wall to the second drive gear, and the first drive gear and the second drive gear are between the first partition wall and the second partition wall. ### Claim 2 (depends on 1) The medical device according to claim 1, further comprising: an outer sheath configured to accommodate the cutting unit. ### Claim 3 (depends on 1) The medical device according to claim 1, further comprising: an aspiration catheter configured to be insertable into the body lumen, and to aspirate the collected debris in the filter portion with the aspiration catheter. ### Claim 4 (depends on 1) The medical device according to claim 1, wherein the filter portion is formed by braiding multiple element wires, and the filter portion is a configured to be self-expanding when released from a sheath. ### Claim 5 (depends on 1) The medical device according to claim 1, wherein a distal side of the filter portion of the filter device is configurable into a closed cage. ### Claim 6 (depends on 1) The medical device according to claim 1, further comprising: a cover portion configured to cover the drive shaft, and wherein the cover portion is configured with braided wires such that a plurality of hole portions are formed by meshes of the braided wires. ### Claim 7 (depends on 1) The medical device according to claim 1, wherein the first drive gear is smaller than the second drive gear. ### Claim 8 (depends on 1) The medical device according to claim 1, wherein the distal tube has a tubular shape, whose outer peripheral surface has multiple convex portions formed on the outer peripheral surface of the distal tube. ### Claim 9 (depends on 1) The medical device according to claim 1, wherein the distal tube is configured to be rotated together with the drive shaft. ### Claim 10 A medical device for cutting substances inside a body lumen, the medical device comprising: a drive shaft that is rotatable; a cutting unit configured to be rotatably connected to a distal side of the drive shaft; a linear motion shaft configured to adjust a deformation amount of the cutting unit; a filter device configured to be inserted in a contracted state into the body lumen, the filter device having an elongated shaft, which interlocks with a filter portion of the filter device; and a distal tube, the distal tube being on a distal side of the cutting unit and separate from the cutting unit, the distal tube being configured to receive the elongated shaft of the filter device, and wherein a distal end portion of the cutting unit is configured to come into contact with a proximal portion of the distal tube by moving the linear motion shaft in a proximal direction with respect to the cutting unit, and the distal tube is configured to be rotated together with the drive shaft. ### Claim 11 (depends on 10) The medical device according to claim 10, further comprising: an outer sheath configured to accommodate the cutting unit. ### Claim 12 (depends on 10) The medical device according to claim 10, further comprising: an aspiration catheter configured to be insertable into the body lumen, and to aspirate the collected debris in the filter portion with the aspiration catheter. ### Claim 13 (depends on 10) The medical device according to claim 10, wherein the filter portion is formed by braiding multiple element wires, and the filter portion is a configured to be self-expanding when released from a sheath. ### Claim 14 (depends on 10) The medical device according to claim 10, wherein a distal side of the filter portion of the filter device is configurable into a closed cage. ### Claim 15 (depends on 10) The medical device according to claim 10, further comprising: a cover portion configured to cover the drive shaft, and wherein the cover portion is configured with braided wires such that a plurality of hole portions are formed by meshes of the braided wires. ### Claim 16 (depends on 10) The medical device according to claim 10, wherein the distal tube has a tubular shape, whose outer peripheral surface has multiple convex portions formed on the outer peripheral surface of the distal tube. ### Claim 17 (depends on 10) The medical device according to claim 10, wherein the distal tube is interlocked with a distal side of the linear motion shaft. ### Claim 18 (depends on 10) The medical device according to claim 10, further comprising: a support portion, which supports the cutting unit; and wherein the distal end portion of the cutting unit is not fixed to the support portion and the linear motion shaft. ### Claim 19 (depends on 18) The medical device according to claim 18, wherein the support portion is configured to move from a contraction state where the support portion has a tubular shape to an expansion state where the support portion is deformed so that a central portion of the support portion is bent radially outward when a distal end portion and a proximal end portion of the support portion are moved towards one another.