Heart valve sealing devices and delivery devices therefor
An implantable prosthetic has a coaption portion, paddles, and clasps. The paddles are extendable from a folded closed position to an open position. A clasp has a fixed arm attached to the paddle. The clasps also have a moveable arm having a barbed portion and an end that is rounded. A hinge portion connects the fixed arm to the moveable arm.
1. An implantable prosthetic device comprising:
an anchor portion comprising a plurality of paddles, the paddles having an outer and inner portion and being extendable from a folded closed position to an open position; and
a clasp attached to each of the plurality of paddles, the clasp comprising:
a fixed arm fixedly attached to the inner portion of the paddle;
a moveable arm having a barbed portion and an end that is rounded; and
a hinge portion directly connecting the fixed arm to the moveable arm.
2. The implantable prosthetic device according to claim 1 , wherein edges of the moveable arm are rounded.
3. The implantable prosthetic device according to claim 1 , wherein the end of the moveable arm has a semi-elliptical shape.
4. The implantable prosthetic device according to claim 1 , wherein the hinge portion comprises a plurality of spring segments, wherein each spring segment is connected to a plurality of spring segments.
5. The implantable prosthetic device according to claim 4 , wherein the spring segments are torsional spring segments.
6. The implantable prosthetic device according to claim 1 , wherein:
the spring segments comprise a first end and a second end; and
the first end of one spring segment is connected to at least one of the first and second end of another spring segment.
7. The implantable prosthetic device according to claim 1 , wherein:
the spring segments comprise a first end, a second end, a first side, and a second side;
a first side joining location is adjacent the first end;
a first end joining location is adjacent the first side;
a second side joining location is adjacent the second end; and
a second end joining location is adjacent the second side.
8. The implantable prosthetic device according to claim 6 , wherein:
the spring segments are arranged into a plurality of rows and columns;
the first or second ends of spring segments proximate a side edge of the clasp are joined to one other spring segment; and
the first or second ends of spring segments proximate an adjacent column are joined to at least one other spring segment.
9. The implantable prosthetic device according to claim 1 , wherein:
the spring segments are arranged in a pattern having three columns and seven rows of spring segments.
10. The implantable prosthetic device according to claim 1 , wherein the clasp is formed from shape memory material and the fixed and moveable arms are shape set in a preloading position so that a pinch force exists between the fixed and moveable arms when the fixed arm is approximately parallel with the moveable arm.
11. The implantable prosthetic device according to claim 10 , wherein the fixed arm is bent in the closing direction beyond the closed position to the preloading position.
12. The implantable prosthetic device according to claim 11 , wherein the fixed arm is bent in the closing direction to about 45 degrees beyond the closed position to the preloading position.
13. The implantable prosthetic device according to claim 11 , wherein the fixed arm is bent in the closing direction to about 90 degrees beyond the closed position to the preloading position.
14. The implantable prosthetic device according to claim 11 , wherein after shape setting, the fixed arm is prohibited from returning to the preloading position by a cross-member.
15. The implantable prosthetic device according to claim 14 , wherein the cross-member is an integral cross-member.
16. The implantable prosthetic device according to claim 1 , wherein a plastic limit of the material of the clasp is not exceeded when the moveable arm is opened to a fully open position about 140 degrees from the fixed arm.
17. The implantable prosthetic device according to claim 1 , wherein barbs of the barbed portion are tapered in the direction of the length of the clasp.
18. The implantable prosthetic device according to claim 1 , wherein the movable arm comprises a plurality of independent arms transitionable between a wide, spread-out configuration and a narrow configuration in which the arms are closer together, and wherein barbs of the barbed portion end in a point.
19. A clasp comprising:
a fixed arm;
a moveable arm;
a hinge portion directly connecting the fixed arm to the moveable arm to enable the clasp to be moved between open and closed positions; and
a barbed portion of the moveable arm comprising a plurality of barbs that extend toward the fixed arm when the clasp is in the closed position.
20. The clasp according to claim 19 , wherein edges of the moveable arm are rounded.
21. The clasp according to claim 19 , wherein the end of the moveable arm has a semi-elliptical shape.
22. The clasp according to claim 19 , wherein the hinge portion comprises a plurality of spring segments, wherein each spring segment is connected to a plurality of spring segments.
23. The clasp according to claim 22 , wherein the spring segments are torsional spring segments.
24. The clasp according to claim 22 , wherein:
the spring segments comprise a first end and a second end; and
the first end of one spring segment is connected to at least one of the first and second end of another spring segment.
25. The clasp according to claim 22 , wherein:
the spring segments comprise a first end, a second end, a first side, and a second side;
a first side joining location is adjacent the first end;
a first end joining location is adjacent the first side;
a second side joining location is adjacent the second end; and
a second end joining location is adjacent the second side.
26. The clasp according to claim 24 , wherein:
the spring segments are arranged into a plurality of rows and columns;
the first or second ends of spring segments proximate a side edge of the clasp are joined to one other spring segment; and
the first or second ends of spring segments proximate an adjacent column are joined to at least one other spring segment.
27. The clasp according to claim 22 , wherein:
the spring segments are arranged in a pattern having three columns and seven rows of spring segments.
28. The clasp according to claim 19 , wherein the clasp is formed from shape memory material and the fixed and moveable arms are shape set in a preloading position so that a pinch force exists between the fixed and moveable arms when the fixed arm is approximately parallel with the moveable arm.
29. The clasp according to claim 28 , wherein the fixed arm is bent in the closing direction beyond the closed position to the preloading position.
30. The clasp according to claim 29 , wherein the fixed arm is bent in the closing direction to about 45 degrees beyond the closed position to the preloading position.
31. The clasp according to claim 29 , wherein the fixed arm is bent in the closing direction to about 90 degrees beyond the closed position to the preloading position.
32. The clasp according to claim 29 , wherein after shape setting, the fixed arm is prohibited from returning to the preloading position by a cross-member.
33. The clasp according to claim 32 , wherein the cross-member is an integral cross-member.
34. The clasp according to claim 19 , wherein a plastic limit of the material of the clasp is not exceeded when the moveable arm is opened to a fully open position about 140 degrees from the fixed arm.
35. The clasp according to claim 19 , wherein barbs of the barbed portion are tapered in the direction of the length of the clasp.
36. The clasp according to claim 19 , wherein the barbs of the barbed portion end in a point.
37. The clasp according to claim 19 , wherein the moveable arm has an end that is rounded.
38. The clasp according to claim 19 , wherein the clasp is formed from a single piece.
39. The clasp according to claim 19 , wherein the moveable arm comprises a plurality of independent arms transitionable between a wide, spread-out configuration and a narrow configuration in which the arms are closer together.
40. An implantable prosthetic device comprising:
an anchor portion comprising a plurality of paddles; and
a clasp attached to each of the plurality of paddles, the clasp comprising:
a fixed arm fixedly attached to one of the plurality of paddles;
a moveable arm having and an end that is rounded; and
a hinge portion directly connecting the fixed arm to the moveable arm.