# US 12,178,437 B2 · Medical device for dilating an endovascular lumen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,437 B2 - Document ID: US12178437B2 - Status: Granted - Kind: B2 - Application number: 18/014,213 - Filed: 2020-07-03 - Published: 2023-06-22 - Granted: 2024-12-31 - Earliest claimed: 2020-07-03 - Assignees: Clearstream Technologies Limited - Applicants: Clearstream Technologies Limited - Inventors: Allan Ronan; Lauren Keogh; Ciaran Giles - Web page: https://patentgrep.com/patent/US12178437B2 ## CPC - A61B 17/12: for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord - A61M 25/04: in the body, e.g. expansible {(A61M25/10, A61M16/0488 take precedence)} - A61M 29/02: Dilators made of swellable material {(balloon catheters for angioplasty A61M25/104)} - A61F 2002/016: {made from wire-like elements} - A61M 25/0662: {Guide tubes} - 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)} - 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 medical device (10) for dilating an endovascular lumen and having a collapsed configuration and an expanded configuration, the medical device comprising a stem (20) extending along a longitudinal axis of the device; a first plate (30) disposed partly around the stem (20); a second plate (40) disposed partly around the stem (20) angularly separated in a circumferential direction from the first plate (30); and an expansion mechanism (50) configured to move each of the first plate (30) and/or the second plate (40) radially outwardly when the medical device (10) is expanded from the collapsed configuration to the expanded configuration. ## Claims ### Claim 1 A medical device for dilating an endovascular lumen and having a collapsed configuration and an expanded configuration, the medical device comprising: a stem extending along a longitudinal axis of the medical device; a first plate disposed partly around the stem; a second plate disposed partly around the stem angularly separated in a circumferential direction from the first plate; and an expansion mechanism configured to move each of the first plate and/or the second plate radially outwardly when the medical device is expanded from the collapsed configuration to the expanded configuration, wherein each of the first plate and/or the second plate comprises at least one ridge disposed on a radial outside surface of the plate, the at least one ridge includes a focus point that extends along a longitudinal length in a longitudinal direction and along a circumferential length in the circumferential direction, and wherein the longitudinal length is longer than the circumferential length, and wherein each of the first plate and/or the second plate is connected to the stem using at least two connection struts. ### Claim 2 (depends on 1) The medical device of claim 1, wherein the expansion mechanism is a mechanically driven leverage mechanism. ### Claim 3 (depends on 1) The medical device of claim 1, wherein the expansion mechanism is configured to move each of the first plate and/or the second plate radially outwardly by moving the at least two connection struts relative to each other. ### Claim 4 (depends on 1) The medical device of claim 1, wherein the at least two connection struts each comprise a first end and a second end, and wherein the first ends are connected to the stem and the second ends are connected to the plate. ### Claim 5 (depends on 4) The medical device of claim 4, wherein the expansion mechanism is configured to move the first ends of the at least two connection struts relative to each other to move each of the first plate and/or the second plate radially outwardly. ### Claim 6 (depends on 1) The medical device of claim 1, wherein the at least two connection struts comprise a first connection strut and a second connection strut. ### Claim 7 (depends on 6) The medical device of claim 6, wherein a first end of the first connection strut is fixed to the stem to restrict longitudinal movement of the first end relative to the stem. ### Claim 8 (depends on 7) The medical device of claim 7, wherein the expansion mechanism is configured to move the first end of the first connection strut and the first end of the second connection strut towards each other to cause the first and second plates to move radially outwardly when the medical device is expanded from the collapsed configuration to the expanded configuration. ### Claim 9 (depends on 6) The medical device of claim 6, wherein a first end of the second connection strut is movably connected to the stem such that the first end can move longitudinally relative to the stem. ### Claim 10 (depends on 1) The medical device of claim 1, wherein the second plate is disposed opposite the first plate. ### Claim 11 (depends on 10) The medical device of claim 10, wherein the expansion mechanism is configured to move the plates radially outwardly in opposite directions when the medical device is expanded from the collapsed configuration to the expanded configuration. ### Claim 12 (depends on 1) The medical device of claim 1, wherein the expansion mechanism comprises the stem having a tubular member and a pull wire. ### Claim 13 (depends on 1) The medical device of claim 1, wherein the expansion mechanism comprises a hydraulic actuator. ### Claim 14 (depends on 13) The medical device of claim 13, wherein actuation of the hydraulic actuator will cause the at least two connection struts to move relative to one another. ### Claim 15 (depends on 13) The medical device of claim 13, wherein actuation of the hydraulic actuator will cause each of the first plate and/or the second plate to move radially outwardly and the medical device to expand from the collapsed configuration to the expanded configuration. ### Claim 16 (depends on 1) The medical device of claim 1, wherein the at least one ridge extends longitudinally along each of the first plate and/or the second plate. ### Claim 17 A medical device for dilating an endovascular lumen and having a collapsed configuration and an expanded configuration, the medical device comprising: a stem extending along a longitudinal axis of the medical device; a first plate disposed partly around the stem; a second plate disposed partly around the stem angularly separated in a circumferential direction from the first plate; and an expansion mechanism configured to move each of the first plate and/or the second plate radially outwardly when the medical device is expanded from the collapsed configuration to the expanded configuration, wherein each of the first plate and/or the second plate comprises at least one ridge disposed on a radial outside surface of the plate, the at least one ridge includes a focus point that extends at least partially along the longitudinal axis, the ridge extends along the full longitudinal length of the first plate and/or the second plate, and wherein each of the first plate and/or the second plate is connected to the stem using at least two connection struts.