# US 11,298,504 B2 · Medical device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,504 B2 - Document ID: US11298504B2 - Status: Granted - Kind: B2 - Application number: 16/005,893 - Filed: 2018-06-12 - Published: 2018-12-13 - Granted: 2022-04-12 - Earliest claimed: 2017-06-13 - Assignees: Kawasumi Laboratories, Inc.; Dai Yamanouchi - Applicants: Kawasumi Laboratories, Inc.; Dai Yamanouchi - Inventors: Dai Yamanouchi; Akira Bonkohara - Web page: https://patentgrep.com/patent/US11298504B2 ## CPC - A61M 25/0023: {by the form of the lumen, e.g. cross-section, variable diameter} - A61B 17/22: Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for - 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)} - A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure} - A61M 25/0082: {Catheter tip comprising a tool} - A61B 2017/00867: {shape memory effect} - A61B 2017/22082: {after introduction of a substance} - A61B 2017/2212: {having a closed distal end, e.g. a loop} - A61M 25/09: Guide wires - A61M 2025/0024: {Expandable catheters or sheaths} - A61M 2025/0096: {being laterally outward extensions or tools, e.g. hooks or fibres} - A61M 2025/0681: {Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A medical device is configured to treat a body cavity. The medical device includes a tubular sheath portion, a foreign substance capturing catheter configured to be movable inside the sheath portion, the foreign substance capturing catheter having a capturing portion configured to capture a foreign substance inside the body cavity, a treatment catheter configured to be movable inside the foreign substance capturing catheter, the treatment catheter having a treatment portion configured to treat the body cavity. The medical device is configured to be inserted into the body cavity in a state in which the treatment catheter is set inside the foreign substance capturing catheter and the foreign substance capturing catheter is set inside the sheath portion. ## Claims ### Claim 1 A medical device configured to treat a body cavity, the medical device comprising: a sheath portion having a tubular shape; a foreign substance capturing catheter configured to be movable inside the sheath portion, and comprising a capturing portion configured to capture a foreign substance inside the body cavity; and a treatment catheter configured to be movable inside the foreign substance capturing catheter, and comprising: a treatment portion configured to treat the body cavity, the treatment portion comprising a plurality of metal wires and being configured to expand and contract, and a distal end tip disposed at a distal end portion of the treatment catheter and configured to prevent blood from entering the sheath portion from the body cavity, wherein the medical device is configured to be inserted into the body cavity in a state in which the treatment catheter is set inside the foreign substance capturing catheter and the foreign substance capturing catheter is set inside the sheath portion, wherein the treatment portion and the distal end tip are separated from each other by a distance along the treatment catheter, wherein a first valve is provided at a proximal end portion of the sheath portion and is configured to prevent the foreign substance capturing catheter from falling off from the sheath portion and to prevent blood from leaking from the sheath portion, and wherein a second valve is provided at a proximal end portion of the foreign substance capturing catheter, and is configured to prevent a displacement of the treatment catheter and to prevent blood from leaking from the foreign substance capturing catheter. ### Claim 2 (depends on 1) The medical device according to claim 1, wherein the distal end tip of the treatment catheter is configured to close an open end of the sheath portion in a state in which the treatment catheter is set inside the foreign substance capturing catheter and the foreign substance capturing catheter is set inside the sheath portion, and wherein the distal end tip of the treatment catheter is configured to unclose the open end of the sheath portion with a movement of the treatment catheter in a distal direction relative to the sheath portion. ### Claim 3 (depends on 1) The medical device according to claim 1, wherein a distal end of the sheath portion is configured to be closed in a state in which the treatment catheter is set inside the foreign substance capturing catheter and the foreign substance capturing catheter is set inside the sheath portion, and wherein the distal end of the sheath portion is configured be unclosed with a movement of one of the foreign substance capturing catheter and the treatment catheter in a distal direction relative to the sheath portion. ### Claim 4 (depends on 1) The medical device according to claim 1, wherein the treatment catheter is configured to remove the foreign substance inside the body cavity. ### Claim 5 (depends on 1) The medical device according to claim 1, wherein the treatment catheter is configured to dissolve the foreign substance inside the body cavity. ### Claim 6 (depends on 1) The medical device according to claim 1, wherein the treatment catheter is further configured to stop bleeding from a blood vessel wall. ### Claim 7 (depends on 1) The medical device according to claim 1, wherein the treatment portion is disposed between the distal end tip and the capturing portion.