# US 10,478,597 B2 · Medical catheter with deflection pull ring and distal tip attachment apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,597 B2 - Document ID: US10478597B2 - Status: Granted - Kind: B2 - Application number: 15/585,195 - Filed: 2017-05-03 - Published: 2017-10-19 - Granted: 2019-11-19 - Earliest claimed: 2007-12-21 - Assignees: St. Jude Medical, Atrial Fibrillation Division, Inc. - Applicants: St. Jude Medical, Atrial Fibrillation Division, Inc. - Inventors: Daniel J. Potter - Web page: https://patentgrep.com/patent/US10478597B2 ## CPC - A61M 25/0147: {with movable mechanical means, e.g. pull wires} - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 2017/003: {Steerable} - A61B 2018/1472: {for use with liquid electrolyte, e.g. virtual electrodes} - A61M 2025/015: {Details of the distal fixation of the movable mechanical means} - 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 catheter includes a deflectable and compressible catheter shaft; a pull ring near a distal end of the catheter shaft; a distal tip that includes a tip element and a mounting shaft; and an attachment apparatus for securely attaching the distal tip to the catheter shaft, the attachment apparatus including a compression ring which compresses the catheter shaft and the mounting shaft together. The compression ring can be located around the catheter shaft to compress the catheter shaft against an outer surface of the mounting shaft, or within the catheter shaft to compress the catheter shaft outwardly against an inner surface of the mounting shaft. The catheter can be a non-irrigated ablation catheter, with the tip element being a tip electrode, and it can be an irrigated ablation catheter, with the distal tip including a fluid manifold. ## Claims ### Claim 1 A catheter assembly, comprising: a distal tip having an axis and including a tip element and a mounting shaft wherein said mounting shaft has an axial passageway extending therethrough and an inner surface that includes a protrusion; an elongate member having a distal end thereof extending into said axial passageway of said mounting shaft wherein said elongate member bears against said protrusion of said mounting shaft; and a reinforcement element positioned within a hollow interior of said elongate member that compresses said elongate member against said inner surface of said mounting shaft. ### Claim 2 (depends on 1) The catheter assembly of claim 1 wherein said elongate member is coupled to said mounting shaft by said protrusion. ### Claim 3 (depends on 1) The catheter assembly of claim 1 wherein said protrusion comprises a plurality of barbs on said inner surface of said mounting shaft that grip said distal end of said elongate member extending into said axial passageway. ### Claim 4 (depends on 1) The catheter assembly of claim 1 wherein said tip element includes a discharge orifice on an external surface thereof and wherein said elongate member comprises a fluid lumen, said tip element being configured to deliver a fluid from said fluid lumen to said discharge orifice. ### Claim 5 (depends on 4) The catheter assembly of claim 4 wherein said tip element comprises a plurality of discharge orifices on said external surface wherein said tip element is configured to deliver said fluid from said fluid lumen to said plurality of discharge orifices. ### Claim 6 (depends on 5) The catheter assembly of claim 5 wherein said discharge orifices are distributed around a circumference of said external surface. ### Claim 7 (depends on 5) The catheter assembly of claim 5 wherein said tip element comprises a manifold in fluid communication with said fluid lumen. ### Claim 8 (depends on 7) The catheter assembly of claim 7 wherein said plurality of discharge orifices are in fluid communication with said manifold through a respective plurality of fluid delivery channels. ### Claim 9 (depends on 1) The catheter assembly of claim 1 wherein said mounting shaft is integral with said tip element. ### Claim 10 (depends on 1) The catheter assembly of claim 1 wherein said protrusion is integral with said mounting shaft. ### Claim 11 (depends on 1) The catheter assembly of claim 1 wherein said reinforcement element comprises a cylindrical body positioned in said hollow interior of said elongate member. ### Claim 12 (depends on 11) The catheter assembly of claim 11 wherein said reinforcement element further comprises a rim extending from said cylindrical body to form a T-shaped reinforcement element. ### Claim 13 (depends on 1) The catheter assembly of claim 1 wherein said tip element comprises a tip electrode. ### Claim 14 A medical device comprising: a handle; an elongate member having a proximal end and a distal end wherein said proximal end is coupled to said handle, said elongate member comprising a fluid lumen; a distal tip including a tip element and a mounting shaft, said mounting shaft having a passageway extending therethrough and an outer surface that includes a protrusion, said mounting shaft extending into a hollow interior of said distal end of said elongate member such that said protrusion bears against said elongate member, said tip element having at least one discharge orifice on an outer surface thereof that is in fluid communication with said fluid lumen. ### Claim 15 (depends on 14) The medical device of claim 14 including a fluid delivery tube having said fluid lumen that is sealingly connected to said mounting shaft to deliver fluid to said passageway of said mounting shaft. ### Claim 16 (depends on 14) The medical device of claim 14 wherein said distal tip further includes a manifold, said manifold being in fluid communication with said fluid lumen through said passageway of said mounting shaft. ### Claim 17 (depends on 16) The medical device of claim 16 wherein said manifold is cylindrical in shape and wherein a fluid channel extends from said manifold to said at least one discharge orifice. ### Claim 18 (depends on 16) The medical device of claim 16 wherein said tip element comprises a plurality of fluid channels extending from said manifold to a respective one of a plurality of discharge orifices positioned around a circumference of said tip element. ### Claim 19 (depends on 14) The medical device of claim 14 wherein said protrusion comprises a barb on said outer surface of said mounting shaft which grips said distal end of said elongate member. ### Claim 20 (depends on 19) The medical device of claim 19 wherein said protrusion comprises a plurality of barbs. ### Claim 21 (depends on 14) The medical device of claim 14 wherein said protrusion comprises an outwardly-projecting annular lip on said mounting shaft.