# US 2014/0194814 A1 · Catheter deflection anchor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194814 A1 - Document ID: US20140194814A1 - Status: Published application - Kind: A1 - Application number: 14/204,655 - Filed: 2014-03-11 - Published: 2014-07-10 - Earliest claimed: 2012-04-19 - Assignees: Medtronic Ablation Frontiers LLC - Applicants: Medtronic Ablation Frontiers LLC - Inventors: Mark Allen BENSCOTER; Stuart Brahm KOZLICK; Jeremy David DANDO - Web page: https://patentgrep.com/patent/US20140194814A1 ## CPC - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 1/0057: {Constructional details of force transmission elements, e.g. control wires} - A61B 1/0125: {Endoscope within endoscope} - A61M 25/0147: {with movable mechanical means, e.g. pull wires} - A61M 2025/015: {Details of the distal fixation of the movable mechanical means} - Y10T 156/1031: with preshaping of lamina - 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)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A system and method for anchoring a round catheter pull wire within the distal end of a catheter. A steering deflection mechanism includes a pull ring having a plurality of apertures and one or more receiving slots. The method includes affixing one or more round pull wires to the one or more receiving slots of the pull ring. The shape of the round wire and manner of affixing the wire to the pull ring provide a steering assembly that can withstand greater pull forces while maintaining design integrity. ## Claims ### Claim 1 A catheter steering device, the device comprising: a substantially annular band having an outer surface and an inner surface and defining a receiving slot that extends between the outer surface and the inner surface, the receiving slot being sized to longitudinally receive a portion of wire having a circular cross section. ### Claim 2 (depends on 1) The device of claim 1, wherein the wire is coupled to the receiving slot in two or more locations. ### Claim 3 (depends on 2) The device of claim 2, wherein the wire is welded to the band in four locations. ### Claim 4 (depends on 3) The device of claim 3, wherein the band further includes a thickness, a first edge, a second edge, and a height between the first edge and second edge, the height of the band being greater than the thickness of the band. ### Claim 5 (depends on 4) The device of claim 4, wherein the band includes a first aperture, a second aperture, and a third aperture, each of the first, second, and third apertures extending between the inner surface and the outer surface of the band. ### Claim 6 (depends on 5) The device of claim 5, wherein a center point of the first aperture is located approximately 180° from a center line of the receiving slot. ### Claim 7 (depends on 6) The device of claim 6, wherein a center point of the second aperture and a center point of the third aperture are each located between approximately 120° from either side of the center point of the first aperture. ### Claim 8 (depends on 7) The device of claim 7, wherein each of the apertures is circular in shape. ### Claim 9 (depends on 8) The device of claim 8, wherein the band includes a first, a second, a third, and a fourth aperture, and a first and second receiving slot. ### Claim 10 (depends on 9) The device of claim 9, wherein a center point of the first aperture and a center point of the second aperture are each located between approximately 40° and approximately 50° from either side of a center line of the first receiving slot, and a center point of the third aperture and a center point of the fourth aperture are each located between approximately 40° and approximately 50° from either side of a center line of the second receiving slot, and wherein the center points of the first and second apertures are located approximately 180° from each other. ### Claim 11 (depends on 10) The device of claim 10, wherein each receiving slot has a keyhole shape. ### Claim 12 (depends on 7) The device of claim 7, wherein the apertures are each equidistant from the first edge and second edge, the receiving slot continuing from the first edge to a distance from the second edge. ### Claim 13 (depends on 12) The device of claim 12, wherein the distance from the second edge is between approximately 10% to approximately 50% of the entire height of the band. ### Claim 14 (depends on 12) The device of claim 12, wherein the receiving slot has a keyhole shape, the widest part of the keyhole shape being located between the first edge and the second edge of the band. ### Claim 15 (depends on 12) The device of claim 12, wherein the receiving slot continues from the first edge to the second edge. ### Claim 16 A catheter steering assembly, the assembly including: a catheter pull wire having a distal end, a proximal end, and a length therebetween, the distal end, the proximal end, and the length each having a circular cross section; and a continuous annular band including an inner face and an outer face and defining at least one receiving slot extending between the inner face and the outer face, the at least one receiving slot being sized to receive the distal end of the catheter pull wire. ### Claim 17 (depends on 16) The assembly of claim 16, wherein the annular band includes a first edge, a second edge, and a height therebetween, each aperture being equidistant from the first edge and second edge, and the at least one receiving slot continuing from the first edge to a distance from the second edge. ### Claim 18 (depends on 17) The assembly of claim 17, wherein: the annular band defines a first aperture, a second aperture, and a third aperture, each of the first, second, and third apertures extending between the inner face and the outer face; a center point of the first aperture is located approximately 180° from the receiving slot; and a center point of the second aperture and a center point of the third aperture is each located approximately 120° from either side of the center point of the first aperture. ### Claim 19 (depends on 18) The assembly of claim 18, wherein: the distal end of the pull wire has a substantially spherical knob on the distal tip; and the receiving slot has a keyhole shape, the widest part of the keyhole shape being located between the first edge and the second edge of the band, the keyhole shape sized to receive the knobbed distal end of the pull wire. ### Claim 20 A catheter steering assembly, the assembly including: a catheter pull wire having a distal end, a proximal end, and a length therebetween, the distal end including a substantially spherical knob defining a maximum diameter, the proximal end and the length each having a circular cross section defining a diameter that is less than the maximum diameter of the substantially spherical knob; and a continuous annular band defining a keyhole-shaped receiving slot, a widest part of the keyhole-shaped receiving slot being sized to receive the substantially spherical knob of the distal end of the catheter pull wire.