TRANSAPICAL MITRAL CHORDAE REPLACEMENT

• US 20150250590A1
• Filed: 02/26/2015
• Published: 09/10/2015
• Est. Priority Date: 03/10/2014
• Status: Abandoned Application

• Current Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: St. Jude Medical Cardiology Division Incorporated (Abbott Laboratories Incorporated)
• Inventors: Gries, Sara Jane, Mertens, Jacob Paul
• Application Number:
  US14/632,300
• Publication Number:
  US 20150250590A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/00336 with a protective sleeve, e.g. retractable or slidable
• CPC Class Codes: A61B 2017/00862 elastic or resilient for sutures A61B2017/0618
• CPC Class Codes: A61B 2017/0404 Buttons
• CPC Class Codes: A61B 2017/0419 H-fasteners
• CPC Class Codes: A61B 2017/0458 Longitudinal through hole, e.g. suture blocked by a distal suture knot
• CPC Class Codes: A61F 2/2457 Chordae tendineae prostheses
• CPC Class Codes: A61F 2/2466 Delivery devices therefor
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2230/0063 Three-dimensional shapes
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped

Abstract

A chordae replacement device includes a first anchor for coupling to a native valve leaflet, a second anchor for coupling to heart tissue and a filament adapted for connection between the first anchor and the second anchor so as to limit the movement of the native valve leaflet away from the second anchor.

Claims

1. A chordae replacement device, comprising:

a first anchor for coupling to a native valve leaflet;

a second anchor for coupling to heart tissue; and

a filament adapted for connection between the first anchor and the second anchor so as to limit the movement of the native valve leaflet away from the second anchor.

2. The chordae replacement device of claim 1, wherein the first anchor comprises a first body and a second body configured to sandwich the native valve leaflet.

3. The chordae replacement device of claim 2, wherein the first body and second body are substantially disk-shaped.

4. The chordae replacement device of claim 1, wherein the second anchor comprises a third body and a fourth body configured to sandwich the heart tissue.

5. The chordae replacement device of claim 4, wherein the third body is substantially disk-shaped and the fourth-body is substantially conical.

6. The chordae replacement device of claim 1, wherein the first and second anchors comprise a shape-memory material that is self-expandable from a collapsed condition during delivery to a relaxed condition during use.

7. The chordae replacement device of claim 6, wherein the first and second anchors comprise braided strands.

8. The chordae replacement device of claim 6, wherein the shape-memory material is nitinol.

9. The chordae replacement device of claim 1, wherein the native valve leaflet is a mitral valve leaflet.

10. The chordae replacement device of claim 1, wherein the heart tissue is an apex of a heart wall.

11. The chordae replacement device of claim 1, wherein the filament comprises Teflon.

12. The chordae replacement device of claim 2, further comprising a hollow bar connecting the first body to the second body.

13. A delivery device for implanting a chordae replacement device having a first anchor, a second anchor and a filament at a deployment site in a patient, the delivery device comprising:

an outer shaft;

an inner sheath disposed within the outer shaft and translatable relative to the outer shaft, the inner sheath being coupleable to the first anchor; and

a piercing wire disposed within the inner sheath and translatable relative to the inner sheath.

14. The delivery device of claim 13, further comprising a retainer capable of supporting a native valve leaflet.

15. The delivery device of claim 14, wherein the retainer comprises a shape-memory material capable of forming a hook at an end of the retainer when deployed from the outer shaft.

16. The delivery device of claim 13, wherein the inner sheath includes a coupling mechanism adapted to mate with a complementary coupling mechanism on the first anchor.

17. A method of deploying a chordae replacement device at a target site, the chordae replacement device including a first anchor for coupling to a native valve leaflet, a second anchor for coupling to heart wall tissue and a filament having one end connected to the first anchor, and a free end, the method comprising:

introducing a delivery device to the target site, the delivery device including an outer shaft, an inner sheath disposed within the outer shaft and translatable relative to the outer shaft, and a piercing wire disposed within the inner sheath and translatable relative to the inner sheath;

penetrating the native valve leaflet with the piercing wire;

advancing the first anchor over the piercing wire to deploy the first anchor in engagement with the native valve leaflet;

withdrawing the delivery system toward the heart wall;

deploying the second anchor in engagement with the heart wall; and

connecting the filament to the second anchor to define a fixed length of filament between the first anchor and the second anchor.

18. The method of claim 17, further comprising supporting the native valve leaflet with a retainer prior to the penetrating step.

19. The method of claim 17, further comprising tensioning the filament by pulling the free end of the filament so that the filament is taut prior to the connecting step.

20. The method of claim 17, wherein the connecting step includes tying a knot in the filament outside the heart wall.