Heart valve sealing devices and delivery devices therefor
An implantable prosthetic device includes a coaption portion, paddles, and clasps. The paddles are extendable from a folded closed position to an open position. The clasps each have a fixed arm and a plurality of moveable arms each having a barbed portion. A plurality of hinge portions connect the moveable arms to the fixed arm.
1. An implantable prosthetic device comprising:
a coaption portion;
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 comprising:
a fixed arm;
a plurality of moveable arms each having a barbed portion; and
a hinge portion hingeably connecting the moveable arms to the fixed arm, the hinge portion comprising a plurality of spring segments arranged into a plurality of rows and columns with each spring segment being connected to a plurality of spring segments, wherein:
the spring segments comprises a first end and a second end;
the first end of one spring segment is connected to at least one of the first and second end of another spring segment;
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.
2. The implantable prosthetic device according to claim 1 , wherein the spring segments are torsional spring segments.
3. The implantable prosthetic device according to claim 1 , wherein:
the spring segments comprise 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.
4. 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.
5. 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.
6. The implantable prosthetic device according to claim 5 , wherein the fixed arm is bent in the closing direction beyond the closed position to the preloading position.
7. The implantable prosthetic device according to claim 6 , wherein the fixed arm is bent in the closing direction to about 45 degrees beyond the closed position to the preloading position.
8. The implantable prosthetic device according to claim 6 , wherein the fixed arm is bent in the closing direction to about 90 degrees beyond the closed position to the preloading position.
9. 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.
10. 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.
11. The implantable prosthetic device according to claim 1 , wherein the barbs of the barbed portion end in a point.
12. A clasp comprising:
a fixed arm;
a plurality of moveable arms each having a barbed portion; and
a hinge portion connecting the moveable arms to the fixed arm, the hinge portion comprising a plurality of spring segments arranged into a plurality of rows and columns with each spring segment being connected to a plurality of spring segments, wherein:
the spring segments comprises a first end and a second end;
the first end of one spring segment is connected to at least one of the first and second end of another spring segment;
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.
13. The clasp according to claim 12 , wherein the spring segments are torsional spring segments.
14. The clasp according to claim 12 , wherein:
the spring segments comprise 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.
15. The clasp according to claim 12 , wherein:
the spring segments are arranged in a pattern having three columns and seven rows of spring segments.
16. The clasp according to claim 12 , 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.
17. The clasp according to claim 16 , wherein the fixed arm is bent in the closing direction beyond the closed position to the preloading position.
18. The clasp according to claim 17 , wherein the fixed arm is bent in the closing direction to about 45 degrees beyond the closed position to the preloading position.
19. The clasp according to claim 17 , wherein the fixed arm is bent in the closing direction to about 90 degrees beyond the closed position to the preloading position.
20. The clasp according to claim 12 , 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.
21. The clasp according to claim 12 , wherein barbs of the barbed portion are tapered in the direction of the length of the clasp.
22. The clasp according to claim 12 , wherein the barbs of the barbed portion end in a point.
23. An implantable device clasp, comprising:
a fixed arm;
a plurality of moveable arms each having a barbed portion; and
a hinge portion hingeably connecting the moveable arms to the fixed arm, the hinge portion comprising a plurality of spring segments arranged into a plurality of rows and columns with each spring segment being connected to a plurality of spring segments, wherein:
the spring segments comprises a first end and a second end;
the first end of one spring segment is connected to at least one of the first and second end of another spring segment;
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.