# US 2023/0404649 A1 · Puncturing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0404649 A1 - Document ID: US20230404649A1 - Status: Published application - Kind: A1 - Application number: 18/035,965 - Filed: 2021-10-12 - Published: 2023-12-21 - Earliest claimed: 2020-11-12 - Assignees: Kaneka Corporation - Applicants: Kaneka Corporation - Inventors: Takuya KANEKO - Web page: https://patentgrep.com/patent/US20230404649A1 ## CPC - 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)} - A61M 25/00: Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00}) - A61B 2017/00526: {Methods of manufacturing} - A61B 2018/00351: {Heart} - A61B 2018/00595: {Cauterization} - A61B 2018/00601: {Cutting} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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)} ## Abstract A puncturing device (1) comprising: a resin tube (10) having a distal end and a proximal end and extending in a longitudinal direction; a metal tube (20) disposed in a lumen of the resin tube (10); a metal core member (30) joined to a distal end portion of the metal tube (20); and a metal tip (40) joined to a distal end portion of the metal core member (30), wherein the puncturing device (1) has a flow path for a liquid, between an inner surface of the resin tube (10) and an outer surface of the metal core member (30), the flow path is in communication with a lumen of the metal tube (20), and the resin tube (10) has, in a side face thereof, an opening (11) that allows communication between the flow path and outside of the resin tube (10). ## Claims ### Claim 1 A puncturing device comprising: a resin tube having a distal end and a proximal end and extending in a longitudinal direction; a metal tube disposed in a lumen of the resin tube; a metal core member joined to a distal end portion of the metal tube; and a metal tip joined to a distal end portion of the metal core member, wherein the puncturing device has a flow path for a liquid, between an inner surface of the resin tube and an outer surface of the metal core member, the flow path is in communication with a lumen of the metal tube, and the resin tube has, in a side face thereof, an opening that allows communication between the flow path and outside of the resin tube. ### Claim 2 (depends on 1) The puncturing device according to claim 1, wherein in a section where the flow path is present, a portion of the outer surface of the metal core member is in contact with the inner surface of the resin tube along the longitudinal direction. ### Claim 3 (depends on 1) The puncturing device according to claim 1, wherein in a cross section perpendicular to the longitudinal direction, a cross-sectional area of the metal core member is larger than a cross-sectional area of the flow path. ### Claim 4 (depends on 1) The puncturing device according to claim 1, wherein the metal core member has a recessed portion extending in the longitudinal direction so that the flow path is formed along the recessed portion of the metal core member. ### Claim 5 (depends on 4) The puncturing device according to claim 4, wherein the metal core member has a plurality of the recessed portions so that the puncturing device has a plurality of the flow paths. ### Claim 6 (depends on 1) The puncturing device according to claim 1, wherein the metal tube and the metal core member are configured so that the outer surface of the metal core member is in contact, with an inner surface of the metal tube, and the outer surface of the metal core member contacts with and extends along the inner surface of the metal tube at a portion at which the outer surface of the metal core member is in contact with the inner surface of the metal tube. ### Claim 7 (depends on 6) The puncturing device according to claim 6, wherein in a cross section perpendicular to the longitudinal direction, the outer surface of the metal core member is in contact with the inner surface of the metal tube at a plurality of portions, so that at each of the plurality of portions, the outer surface of the metal core member contacts with and extends along the inner surface of the metal tube. ### Claim 8 (depends on 1) The puncturing device according to claim 1, wherein in a cross section perpendicular to the longitudinal direction, the outer surface of the metal core member is in contact with the inner surface of the resin tube at a plurality of portions, so that at each of the plurality of portions, the outer surface of the metal core member contacts with and extends along the inner surface of the resin tube. ### Claim 9 (depends on 1) The puncturing device according to claim 1, wherein on a distal side relative to a distal end of the metal tube, the metal core member has an outer surface that is in contact with the inner surface of the resin tube. ### Claim 10 (depends on 1) The puncturing device according to claim 1, wherein a proximal end of the metal core member is on a proximal side relative to a distal end of the metal tube, and a distal end of the metal core member is on a proximal side relative to the distal end of the resin tube. ### Claim 11 (depends on 1) The puncturing device according to claim 1, wherein a distance from a distal end of the metal tube to a proximal end of the metal core member is smaller than a distance from the distal end of the metal tube to a distal end of the metal core member. ### Claim 12 (depends on 1) The puncturing device according to claim 1, wherein a distal end of the metal tip is on a distal side relative to the distal end of the resin tube. ### Claim 13 (depends on 1) The puncturing device according to claim 1, wherein the metal tip has an inner cavity, and an X-ray opaque marker is disposed in the inner cavity of the metal tip. ### Claim 14 (depends on 1) The puncturing device according to claim 1, wherein the opening is on a distal side relative to a distal end of the metal tube.