# US 8,540,695 B2 · Catheter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,695 B2 - Document ID: US8540695B2 - Status: Granted - Kind: B2 - Application number: 12/575,032 - Filed: 2009-10-07 - Published: 2010-04-15 - Granted: 2013-09-24 - Earliest claimed: 2008-10-11 - Assignees: Asahi Intecc Co., Ltd. - Applicants: Manabu Shimogami; Nobuyoshi Watanabe - Inventors: Manabu Shimogami; Nobuyoshi Watanabe - Web page: https://patentgrep.com/patent/US8540695B2 ## CPC - A61M 25/005: {with embedded materials for reinforcement, e.g. wires, coils, braids} - A61M 25/0053: {having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid} - A61B 2017/22094: {for crossing total occlusions, i.e. piercing} - A61M 25/0108: {using radio-opaque or ultrasound markers} - A61M 2025/0059: {having means for preventing the catheter, sheath or lumens from collapsing due to outer forces, e.g. compressing forces, or caused by twisting or kinking} - A61M 2025/0081: {Soft tip} - 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 catheter body includes a hollow coil whose outer and inner surfaces are coated with outer and inner resin layers. A resin tip is provided at a distal end of the catheter body. The tip has a tapered section at a distal end of the tip. Also, an axially extending braid is embedded in the catheter body and the tip to extend from the catheter body to the tip. ## Claims ### Claim 1 A catheter comprising: a catheter body including a hollow coil in which a plurality of metal strands are wound or stranded, an inner resin layer arranged on an inner surface of the hollow coil, the inner resin layer defining a lumen, and an outer resin layer arranged on an outer surface of the hollow coil; a tip made of resin that is provided at a distal end of the catheter body, the tip having a tapered section with an outer diameter that continuously decreases from the distal end of the catheter body to a distal end of the tip, the tip having an inner bore communicating with the lumen of the inner resin layer, wherein the inner resin layer is made of at least two different layers and the tip is made of a material that is softer than a material of the at least two different layers; and a braid extending in an axial direction of the catheter body across a boundary between a proximal end of the tip and the distal end of the catheter body, the braid also extending into the tapered section of the tip and being positioned between the inner resin layer and the hollow coil in the catheter body, wherein the hollow coil does not extend across the boundary. ### Claim 2 (depends on 1) The catheter according to claim 1, further comprising: a second coil extending from the boundary toward the distal end of the tip, wherein a distance between a distal end of the second coil and the boundary is shorter than a distance between a distal end of the braid and the boundary. ### Claim 3 (depends on 2) The catheter according to claim 2, wherein the tapered section of the tip does not contain the second coil. ### Claim 4 (depends on 1) The catheter according to claim 1, wherein a distal end of the braid is distant from the distal end of the tip. ### Claim 5 A catheter comprising: a catheter body including a hollow coil in which a plurality of metal strands are wound or stranded, an inner resin layer arranged on an inner surface of the hollow coil, the inner resin layer defining a lumen, and an outer resin layer arranged on an outer surface of the hollow coil; a tip made of resin that is provided at a distal end of the catheter body, the tip having: i) a tapered section with an outer diameter that decreases toward a distal end of the tip, and ii) an inner bore communicating with the lumen of the inner resin layer; and a braid extending in an axial direction of the catheter body across a boundary between a proximal end of the tip and the distal end of the catheter body, wherein the hollow coil does not extend across the boundary, the inner resin layer includes an innermost layer and a middle layer that is positioned between the innermost layer and the hollow coil, a distal end of the innermost layer: i) extends across the boundary toward the distal end of the tip, and ii) is closer to the distal end of the tip than is a distal end of the middle layer, the braid is embedded within the middle layer in the catheter body, and a distal portion of the braid projects from the distal end of the middle layer toward the distal end of the tip, so that the distal portion of the braid is embedded within the tapered section tip. ### Claim 6 (depends on 5) The catheter according to claim 5, further comprising: a second coil extending from the boundary toward the distal end of the tip, wherein a distance between a distal end of the second coil and the boundary is shorter than a distance between a distal end of the braid and the boundary. ### Claim 7 (depends on 6) The catheter according to claim 6, wherein a portion of the tip does not contain the second coil. ### Claim 8 (depends on 5) The catheter according to claim 5, wherein a distal end of the braid is distant from the distal end of the tip. ### Claim 9 (depends on 5) The catheter according to claim 5, wherein the tip is made of a material that is softer than a material of the innermost layer and a material of the middle layer.