Cardiac valve leaflet enhancer devices and systems
The disclosure relates to a device that is configured to be implanted on the native leaflet of a heart valve to increase its length and/or thickness and thereby to improve the valve function and reduce regurgitation. The device may include a leaflet section. The leaflet section may include a central member. The central member may include a first portion, a second portion that opposes the first portion, and a base portion disposed between the first portion and the second portion. The first section may extend from the first portion and the second section may extend from the second portion. The device may include one or more engaging members extending from the central member at an angle with respect to the first section and the second section. The second section may be larger than the first section. The leaflet section may define a three-dimensional region or a bulge.
1. An implant for reducing heart valve regurgitation, comprising:
a leaflet section including one or more engaging members at least in part defining an internal leaflet section volume, wherein the internal leaflet section volume is configured to receive at least a portion of a native valve leaflet therein, the one or more engaging members including a free end;
first and second arms each extending from the leaflet section, wherein the first arm is moveable relative to the second arm and wherein the first and second arms are configured to clamp the native valve leaflet therebetween, the one or more engaging members extending laterally relative to at least one of the first or second arms; and
a cover coupled to the leaflet section and enclosing the internal leaflet section volume.
2. The implant of claim 1 , wherein the first arm is smaller than the second arm.
3. The implant of claim 2 , wherein the second arm comprises an opening configured to receive the first arm.
4. The implant of claim 3 , wherein the first arm is configured to be positioned on a ventricular side of the native valve leaflet and the second arm is configured to be positioned on an atrial side of the native valve leaflet.
5. The implant of claim 1 , wherein the first and second arms assume a coplanar alignment when in an unbiased, default configuration.
6. The implant of claim 1 , wherein the implant is configured to be retained on the native valve leaflet without an additional securing mechanism.
7. The implant of claim 6 , wherein the first and second arms are biased toward a closed configuration, and wherein a biasing force between the first and second arms is sufficient to retain the implant on the native valve leaflet without the additional securing mechanism.
8. The implant of claim 1 , wherein the leaflet section has a curved shape.
9. The implant of claim 8 , wherein the leaflet section further comprises a first portion on a first side of the internal leaflet section volume and a second portion on a second, opposite side of the internal leaflet section volume, wherein the first portion and the second portion each have a convex curvature.
10. The implant of claim 9 , wherein a radius of curvature of the first portion is different from a radius of curvature of the second portion.
11. The implant of claim 1 , wherein the leaflet section further includes a central spine spaced from the first and second arms.
12. The implant of claim 1 , wherein at least one of the one or more engaging members comprises a curved segment.
13. The implant of claim 1 , wherein a longitudinal axis of the leaflet section is transverse to a longitudinal axis of the first arm.
14. The implant of claim 1 , wherein one or more of the first arm and the second arm comprises a tissue gripping member positioned on a surface configured to face the native valve leaflet.
15. The implant of claim 14 , wherein the tissue gripping member is formed separately on a plate and then coupled to the first arm or the second arm.
16. The implant of claim 15 , wherein the plate extends into the internal leaflet section volume.
17. The implant of claim 1 , wherein the cover extends over at least a part of one or more of the first arm and the second arm.
18. An implant for reducing heart valve regurgitation, the implant comprising:
a leaflet section comprising an internal leaflet section volume, wherein the leaflet section is configured to modify one or more of a leaflet length, a leaflet curvature, and a leaflet thickness of a native valve leaflet;
first and second arms each extending from the leaflet section, wherein the first and second arms have a closed configuration in which the first arm is disposed within an opening defined by the second arm and an open configuration, and wherein the first and second arms are configured to clamp the native valve leaflet therebetween in the closed configuration; and
a cover coupled to the leaflet section and enclosing the internal leaflet section volume.
19. The implant of claim 18 , wherein the leaflet section is configured to modify the leaflet length of the native valve leaflet.
20. The implant of claim 18 , wherein the leaflet section is configured to modify the leaflet curvature of the native valve leaflet.
21. An implant for reducing heart valve regurgitation, the implant comprising:
a leaflet section comprising an internal leaflet section volume, wherein the leaflet section is configured to reduce a gap between first and second native valve leaflets;
first and second arms each extending from the leaflet section, wherein the first and second arms have a closed configuration and an open configuration, and wherein the first and second arms are configured to clamp the first native valve leaflet therebetween in the closed configuration, with a free end of the first native valve leaflet disposed within the internal leaflet section volume;
a tissue gripping member extending into the internal leaflet section volume when the first and second arms are in the closed configuration and such that the tissue gripping member engages a portion of the first native valve leaflet that is disposed within the internal leaflet section volume; and
a cover coupled to the leaflet section and enclosing the internal leaflet section volume.
22. The implant of claim 21 , wherein the leaflet section further comprises a central spine.
23. The implant of claim 21 , wherein the first and second arms are biased toward the closed configuration, and wherein a biasing force between the first and second arms is sufficient to retain the implant on the first native valve leaflet without an additional securing mechanism.
24. The implant of claim 21 , wherein the leaflet section further comprises a first portion on a first side of the internal leaflet section volume and a second portion on a second, opposite side of the internal leaflet section volume, wherein the first portion and the second portion each have a convex curvature.
25. The implant of claim 1 , wherein the one or more engaging members extend laterally relative to and beyond the first and second arms.
26. The implant of claim 1 , wherein the one or more engaging members include a linear segment and a curvature segment.
27. The implant of claim 1 , wherein the leaflet section further includes a hinge disposed between the first and second arms, the one or more engaging members extending laterally relative to the hinge.
28. The implant of claim 1 , wherein a longitudinal axis of the leaflet section is transverse to a longitudinal axis of at least one of the first arm or the second arm.
29. The implant of claim 1 , wherein the one or more engaging members includes at least two engaging members.
30. The implant of claim 1 , further comprising a tissue gripping member extending from at least one of the first arm, the second arm, or the leaflet section, and into the internal leaflet section volume, the tissue gripping member configured to engage the native valve leaflet within the internal leaflet section volume.
31. The implant of claim 18 , wherein in the closed configuration the first and second arms assume a coplanar alignment with the first arm disposed within the opening of the second arm.
32. The implant of claim 18 , wherein the leaflet section includes one or more engaging members at least in part defining the internal leaflet section volume, the one or more engaging members extending laterally relative to at least one of the first arm or the second arm, and terminating at a free end.
33. The implant of claim 18 , wherein the first arm has a cross-sectional area less than a cross-sectional area of the second arm.
34. The implant of claim 18 , wherein the implant is configured to be retained on the native valve leaflet without an additional securing mechanism.
35. The implant of claim 21 , wherein the leaflet section further includes (1) a central spine disposed between the first and second arms, and (2) engaging members each terminating a free end.
36. The implant of claim 35 , wherein the engaging members extend laterally relative to and beyond the first and second arms.
37. The implant of claim 21 , wherein the second arm defines an opening to receive the first arm such that the first arm and the second arm are at least partially in a coplanar alignment.
38. The implant of claim 21 , wherein a longitudinal axis of the leaflet section is transverse to a longitudinal axis of at least one of the first arm or the second arm.
39. The implant of claim 21 , wherein the tissue gripping member is a first tissue gripping member, the implant further comprising:
a second tissue gripping member extending from the first arm and a third tissue gripping member extending from the second arm.
40. The implant of claim 21 , wherein the leaflet section further includes a central spine disposed between the first and second arms, the tissue gripping member extending towards the central spine.
41. The implant of claim 21 , wherein the tissue gripping member is axially spaced from at least one of the first arm or the second arm.