Prosthetic valved conduits with mechanically coupled leaflets
Described embodiments are directed toward centrally-opening leaflet prosthetic valve devices having a leaflet frame and a non-sewn mechanically coupled leaflet. The described leaflet frames have projections that are configured to couple with apertures located within the leaflet attachment region of a leaflet. Some embodiments are further directed toward pulmonary valved conduits incorporating such leaflet and leaflet frame constructs. Methods of making and using such prosthetic valve devices are also described amongst others.
1. A prosthetic valve comprising:
at least one leaflet, each leaflet having a leaflet attachment region and a leaflet free edge;
a leaflet frame having one or more leaflet frame edges, the leaflet frame having a plurality of leaflet frame projections extending from at least one of the leaflet frame edges, each of the leaflet frame projections extending through the leaflet attachment region of the leaflet; and
one or more restraining elements configured to impede decoupling of the leaflet from the leaflet frame, wherein the leaflet frame defines an annular shape and wherein the one or more restraining elements extend in a direction that is substantially parallel with a central longitudinal axis of the prosthetic valve.
2. The prosthetic valve of claim 1 , wherein the plurality of leaflet frame projections are unitary with the leaflet frame.
3. The prosthetic valve of claim 1 , wherein the leaflet frame has a leaflet frame first edge, a leaflet frame second edge opposite the leaflet frame first edge, and at least one leaflet frame internal edge, and wherein a leaflet retention surface is one or more of the leaflet frame second edge, the leaflet frame first edge, and the at least one leaflet frame internal edge.
4. The prosthetic valve of claim 3 , wherein the leaflet retention surface is the leaflet frame second edge.
5. The prosthetic valve of claim 1 , wherein each of the leaflet frame projections comprises a projection base portion and the one or more restraining elements includes a projection head portion coupled to a respective projection base portion of a leaflet frame projection, wherein a transverse dimension of each projection head portion is greater than a transverse dimension of its respective projection base portion.
6. The prosthetic valve of claim 3 , wherein the leaflet frame has a plurality of commissure posts and a set of leaflet window frame elements flanking each side of each commissure post, wherein each set of leaflet window frame elements and two of the plurality of commissure posts defines one of a plurality of leaflet windows.
7. The prosthetic valve of claim 6 , wherein each commissure post has a post slot therethrough, wherein a portion of the leaflet attachment region that is adjacent to the leaflet free edge extends through the post slot adjacent thereto such that a portion of two of the leaflets extends through each post slot.
8. The prosthetic valve of claim 7 , wherein the set of leaflet window frame elements includes two leaflet window sides and a leaflet window base therebetween.
9. The prosthetic valve of claim 8 , wherein the leaflet window sides each define a side receiving slot therethrough and the leaflet window base defines a base receiving slot therethrough, wherein the leaflet window sides include a portion of the leaflet retention surface and wherein the leaflet window base includes a portion of the leaflet retention surface, and
wherein a first portion of the leaflet attachment region extends through one of the two side receiving slots with respective leaflet frame projections extending through the leaflet attachment region, a second portion of the leaflet attachment region extends through the other of the two side receiving slots with respective leaflet frame projections extending through the leaflet attachment region, and a third portion of the leaflet attachment region extends through the base receiving slot with respective leaflet frame projections extending through the leaflet attachment region.
10. The prosthetic valve of claim 9 , wherein the leaflet attachment region defines one or more notches.
11. The prosthetic valve of claim 9 , wherein the leaflet retention surface is the leaflet frame second edge.
12. The prosthetic valve of claim 9 , wherein the one or more of the leaflet window frame elements defines a leaflet frame opening therethrough that is adjacent to a respective receiving slot and is on the side opposite from the leaflet frame second edge, wherein the leaflet retention surface includes a portion of the leaflet frame internal edge defining each leaflet frame opening.
13. The prosthetic valve of claim 9 , wherein the set of leaflet window frame elements together defines three sides of an isosceles trapezoid, wherein the leaflet window base defines a leaflet window base second edge that is substantially straight.
14. A prosthetic valve of claim 1 , wherein the leaflet frame is operable to have a first diameter and a second diameter that is larger than the first diameter, wherein the prosthetic valve is configured for use as a transcatheter prosthetic valve.
15. The prosthetic valve of claim 1 , wherein the leaflet comprises a material that is synthetic or of animal origin.
16. The prosthetic valve of claim 1 , wherein the leaflet comprises at least one fluoropolymer membrane layer.
17. A prosthetic valve comprising:
at least one leaflet, each leaflet having a leaflet attachment region and a leaflet free edge; and
a leaflet frame comprising:
a leaflet frame first edge, a leaflet frame second edge opposite the leaflet frame first edge, and at least one leaflet frame internal edge;
a leaflet retention surface that is one or more of the leaflet frame second edge, the leaflet frame first edge, and the at least one leaflet frame internal edge;
a plurality of leaflet frame projections extending from at least one of the leaflet frame first edge, the leaflet frame second edge, or the at least one leaflet frame internal edge, wherein each of the leaflet frame projections extends through the leaflet attachment region of the leaflet;
a plurality of commissure posts and a set of leaflet window frame elements flanking each side of each commissure post, wherein each set of leaflet window frame elements and two of the plurality of commissure posts defines one of a plurality of leaflet windows, and wherein each commissure post has a post slot therethrough, wherein a portion of the leaflet attachment region that is adjacent to the leaflet free edge extends through the post slot adjacent thereto such that a portion of two of the leaflets extends through each post slot; and
one or more restraining elements configured to impede decoupling of the leaflet from the leaflet frame.
18. The prosthetic valve of claim 17 , wherein the set of leaflet window frame elements includes two leaflet window sides and a leaflet window base therebetween.
19. The prosthetic valve of claim 18 , wherein the leaflet window sides each define a side receiving slot therethrough and the leaflet window base defines a base receiving slot therethrough, wherein the leaflet window sides include a portion of the leaflet retention surface and wherein the leaflet window base includes a portion of the leaflet retention surface, and
wherein a first portion of the leaflet attachment region extends through one of the two side receiving slots with respective leaflet frame projections extending through the leaflet attachment region, a second portion of the leaflet attachment region extends through the other of the two side receiving slots with respective leaflet frame projections extending through the leaflet attachment region, and a third portion of the leaflet attachment region extends through the base receiving slot with respective leaflet frame projections extending through the leaflet attachment region.
20. The prosthetic valve of claim 18 , wherein the set of leaflet window frame elements together defines three sides of an isosceles trapezoid, wherein the leaflet window base defines a leaflet window base second edge that is substantially straight.