# US 2021/0259840 A1 · Cardiac Valve Downsizing Device And Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0259840 A1 - Document ID: US20210259840A1 - Status: Published application - Kind: A1 - Application number: 17/246,640 - Filed: 2021-05-01 - Published: 2021-08-26 - Earliest claimed: 2007-12-21 - Assignees: Medtentia International Ltd Oy - Applicants: Medtentia International Ltd. Oy - Inventors: Olli Keränen; Per Antonsson - Web page: https://patentgrep.com/patent/US20210259840A1 ## CPC - A61F 2/2445: {Annuloplasty rings in direct contact with the valve annulus} - A61F 2/2466: {Delivery devices therefor} - A61F 2/2409: {Support rings therefor, e.g. for connecting valves to tissue (annuloplasty rings A61F2/2442)} - A61F 2/2448: {D-shaped rings} - A61F 2/2457: {Chordae tendineae prostheses} - A61F 2230/0091: helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section - A61F 2250/006: modular - 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 kit for repairing and/or replacing a mitral valve includes a mitral valve prosthesis and a loop-shaped element with a proximal end, a distal end, and a curved body. A proximal portion of the curved body is sized for positioning on an atrial side of the mitral valve and a distal portion of the curved body is sized for positioning on a ventricular side of the mitral valve. The distal portion has a first curved region with a radius of curvature that is larger than the radius of curvature of a second curved region so that the distal portion passes between heart muscle wall and chordae and circumflex the chordae of the mitral valve when the distal portion is rotated into place at the ventricular side of the native mitral valve. ## Claims ### Claim 1 A kit for repair and/or replacement of a native mitral valve, the kit comprising: a loop-shaped element comprising: a proximal end; a distal end; and a curved body extending between the proximal and distal ends, the curved body comprising a proximal portion, a distal portion, and a middle portion extending between the proximal portion and the distal portion, wherein: the proximal portion extends from the proximal end and is sized for positioning on an atrial side of the native mitral valve; the distal portion extends from the distal end and is sized for positioning on a ventricular side of the native mitral valve; the proximal portion, the distal portion, and the middle portion are formed continuously to form the curved body; the middle portion is configured to extend through a natural opening in the native mitral valve; the distal portion comprising first and second curved regions, the first curved region extending between the distal end and the second curved region, the first curved region having a first radius of curvature that is larger than a second radius of curvature of the second curved region; the first radius of curvature is sized so that during delivery of the loop-shaped element to the native mitral valve, the distal portion passes between native heart muscle wall and chordae of the native mitral valve so as to circumflex the chordae of the native mitral valve when the distal portion rotates into place at a ventricular side of the native mitral valve; the curved body comprising a substantially helical shaped portion having at least two full turns around a center axis that is substantially perpendicular to a plane diametric to the turns of the curved body, and a portion extending in parallel to the center axis and off-center from a center of the turns of the curved body; and a mitral valve prosthesis configured for fixation at the native mitral valve. ### Claim 2 (depends on 1) The kit according to claim 1, wherein the proximal end of the loop-shaped element comprises a connection interface configured to releasably attach to a delivery device. ### Claim 3 (depends on 1) The kit according to claim 1, wherein the distal portion of the loop-shaped element further includes a transition region arranged between the first curved region and the second curved region, wherein the transition region has a radius of curvature that gradually decreases from the first radius of curvature to the second radius of curvature. ### Claim 4 (depends on 1) The kit according to claim 1, wherein the distal end is arranged radially outwards or axially downwards from a diametric plane of the distal portion of the loop-shaped element, so as to circumflex the chordae. ### Claim 5 (depends on 1) The kit according to claim 1, wherein at least some of the distal portion has a non-circular shape. ### Claim 6 (depends on 1) The kit according to claim 1, wherein at least some of the proximal portion has a non-circular shape. ### Claim 7 (depends on 1) The kit according to claim 1, wherein the loop-shaped element is configured to be compressible for delivery in a catheter. ### Claim 8 (depends on 7) The kit according to claim 7, wherein the loop-shaped element is formed from a shape-memory material. ### Claim 9 (depends on 1) The kit according to claim 1, wherein the loop-shaped element includes sections of differing rigidity. ### Claim 10 (depends on 1) The kit according to claim 1, wherein the loop-shaped element includes sections of differing flexibility. ### Claim 11 (depends on 1) The kit according to claim 1, wherein the distal portion of the loop-shaped element is configured to reposition the chordae towards a center of the native mitral valve. ### Claim 12 (depends on 1) The kit according to claim 1, wherein the mitral valve prosthesis is configured to be attached to the loop-shaped element. ### Claim 13 (depends on 12) The kit according to claim 12, wherein the mitral valve prosthesis is configured to be inserted along the center axis of the loop-shaped element to place the mitral valve prosthesis into position at the native mitral valve. ### Claim 14 (depends on 1) The kit according to claim 1, wherein upon positioning the distal portion at the ventricular side of the native mitral valve and positioning the proximal portion at the atrial side of the native mitral valve, native valve tissue is arranged between the distal and proximal portions of the loop-shaped element. ### Claim 15 (depends on 14) The kit according to claim 14, wherein the distal portion and proximal portion are arranged to provide a releasable pinch. ### Claim 16 (depends on 1) The kit according to claim 1, wherein the substantially helical shaped portion has at least two and a half turns. ### Claim 17 (depends on 1) The kit according to claim 1, wherein the portion of the curved body extending in parallel to the center axis is arranged as part of the proximal portion of the loop-shaped element. ### Claim 18 (depends on 17) The kit according to claim 17, wherein the portion of the curved body extending in parallel to the center axis is arranged at the proximal end of the loop-shaped element. ### Claim 19 (depends on 1) The kit according to claim 1, wherein at least the middle portion of the curved body is included in the substantially helical shaped portion of the curved body. ### Claim 20 (depends on 19) The kit according to claim 19, wherein at least a part of the distal portion of the curved body is included in the substantially helical shaped portion of the curved body. ### Claim 21 (depends on 20) The kit according to claim 20, wherein at least a part of the proximal portion of the curved body is included in the substantially helical shaped portion of the curved body.