# US 2025/0082903 A1 · Method of Accessing A Vascular Site With A Multi-Directional Steerable Catheter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0082903 A1 - Document ID: US20250082903A1 - Status: Published application - Kind: A1 - Application number: 18/774,349 - Filed: 2024-07-16 - Published: 2025-03-13 - Earliest claimed: 2015-10-19 - Assignees: BioCardia, Inc. - Applicants: BioCardia, Inc. - Inventors: Wai Hsueh; Ken Vien; James B. Ross - Web page: https://patentgrep.com/patent/US20250082903A1 ## CPC - A61M 25/0136: {Handles therefor} - 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)} - A61F 2/2427: {Devices for manipulating or deploying heart valves during implantation} - 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) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A bi-directional steerable catheter adapted for delivery into a patient's vasculature. The pull wires which are used to tension the deflectable segment of the steerable catheter are wound in parallel around the axis of the steerable catheter on opposite sides of the steerable catheter. ## Claims ### Claim 1 A method of accessing a target site in a first iliac artery of a patient, said method comprising the steps of: providing a steerable catheter comprising: a tube (2) having a proximal end (4), a distal end (5), and a lumen extending therebetween, said tube (2) having a first segment (2d) proximate said distal end and a second segment (2w) that extends proximally from said first segment (2d) toward said proximal end, a first pull wire (12) disposed within a first side lumen of the tube (2) and a second pull wire (13) disposed within a second side lumen of the tube (2), and extending from the distal end (5) to the proximal end (4) of the tube (2), said first and second pull wires comprising first and second wound segments (12w, 13w) which are wound about a longitudinal axis of the tube in the second segment (2w) of the tube, with the first wound segment (12w) and the second wound segment (13w) dispersed circumferentially about the longitudinal axis of the tube (2); wherein the wound segments (12w, 13w) are configured to reduce whipping when the tube (2) is rotated around the longitudinal axis of the tube (2), a handle (3) fixed to the tube (2), said handle comprising: means for selectively tensioning the first pull wire without tensioning the second pull wire, or tensioning the second pull wire without tensioning the first pull wire, to provide bidirectional steering of the deflectable segment; inserting the steerable catheter through a second iliac artery of the patient and over an iliac bifurcation of the patient until the first segment of the tube is disposed proximate the target site in the first iliac artery of the patient, in a curved configuration; and operating one or both of the pull wires to deflect the first segment of the tube around the iliac bifurcation to advance the first segment into the first iliac artery and toward the target site. ### Claim 2 (depends on 1) The method of claim 1, further comprising a step of: rotating the tube about the long axis of the tube (2) while the steerable catheter is disposed in the first or second iliac artery. ### Claim 3 (depends on 1) The method of claim 1, wherein: the steerable catheter is provided in a form in which the first pull wire (12) is wound in a first direction and the second pull wire (13) is wound in the first direction, substantially in parallel with the first pull wire. ### Claim 4 (depends on 1) The method of claim 1, wherein: the steerable catheter is provided in a form in which the first pull wire and second pull-wire are counter-wound. ### Claim 5 (depends on 1) The method of claim 1, wherein: the steerable catheter is provided in a form in which the first pull wire (12) extends proximally from the first wound segment (12w) in a straight proximal segment of the first pull wire (12p) and the second pull wire (13) extends proximally from the second wound segment (13w), in a straight proximal segment of the second pull wire (13p), and said straight proximal segment of the first pull wire (12p) and said straight proximal segment of the second pull wire (13p) extend proximally on opposite sides of the tube (2). ### Claim 6 (depends on 1) The method of claim 1, wherein the steerable catheter is provided in a form in which the steerable catheter comprises at least two pull wires, and the wound segments are dispersed about the circumference of the steerable catheter. ### Claim 7 (depends on 1) The method of claim 1, wherein the steerable catheter is provided in a form further characterized in that: the first pull wire (12) extends distally within the first segment (2d) of the tube (2) from the first wound segment (12w) in a straight distal segment of the first pull wire (12d) and the second pull wire (13) extends distally within the first segment (2d) of the tube (2) from the second wound segment (13w), in a straight distal segment of the second pull wire (13d), and said straight distal segment of the first pull wire (12d) and said straight distal segment of the second pull wire (13d) extend distally on opposite sides of the tube (2).