Assembly for setting a valve prosthesis in a corporeal duct
The invention concerns an assembly comprising a valve prosthesis to be implanted and a support receiving said valve. The support comprises: at least a tubular portion made of a pliable material slightly stretchable in the circumferential direction; means for fixing said tubular portion to the wall of the corporeal duct; and a plurality of elongated reinforcing elements, arranged on the circumference of said tubular portion and linked to said tubular portion independently of one another; the valve is linked at least partly to said elongated reinforcing elements, in particular at the commissures of its leaflets, and said elongated reinforcing elements jointly form, in extended position, a structure having a predetermined diameter that ensures sufficient extension of said valve.
1. A heart valve prosthesis assembly having a longitudinal axis and comprising an implantable valve and a valve support for supportably receiving the implantable valve, the implantable valve and the valve support being configured to contract for delivery and deployment and expand for implantation, the valve support comprising:
a portion having an inner surface and an outer surface, said portion comprising a radially expandable pliable material, the radially expandable pliable material being slightly stretchable in the circumferential direction;
a plurality of radially positioned anchoring prongs configured to anchor the heart valve prosthesis assembly to anatomy of the implantation site, the plurality of radially positioned anchoring prongs being configured to be inserted into the anatomy of the implantation site upon deployment of the heart valve prosthesis assembly; and
a plurality of elongated reinforcing elements at least partially attached to the portion, the plurality of elongated reinforcing elements arranged on the outer surface of the portion, wherein each one of the plurality of elongated reinforcing elements are attached to the portion independently of one another.
2. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs are configured to not protrude outside of the outer radial surface of the portion before implantation of the heart valve prosthesis assembly.
3. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs are configured to be extendable for radial insertion into the anatomy of the implantation site.
4. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs are configured to be extendable for non-radial insertion into the anatomy of the implantation site.
5. The assembly of claim 4 , wherein the plurality of radially positioned anchoring prongs are configured to be non-radially extendable for oblique orientation insertion into the anatomy of the implantation site.
6. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs penetrate the portion.
7. The assembly of claim 1 , wherein the plurality of elongated reinforcing elements comprise at least two portions, wherein at least one of the portions defines a curved shape.
8. The assembly of claim 7 , wherein at least one of the portions defines a convex shape with respect to the longitudinal axis of the heart valve prosthesis assembly.
9. The assembly of claim 7 , wherein at least one of the remaining portions is substantially straight.
10. The assembly of claim 9 , wherein at least one of the remaining portions is substantially straight with respect to the longitudinal axis of the heart valve prosthesis assembly.
11. The assembly of claim 9 , wherein the plurality of elongated reinforcing elements are attached to the portion at the substantially straight portion of the plurality of elongated reinforcing elements.
12. The assembly of claim 9 , wherein the plurality of radially positioned anchoring prongs penetrate the substantially straight portion of the plurality of elongated reinforcing elements.
13. The assembly of claim 1 , wherein the plurality of elongated reinforcing elements are configured to expand to a predetermined diameter that substantially ensures sufficient expansion of the implantable valve.
14. The assembly of claim 1 , wherein at least one of the plurality of radially positioned anchoring prongs is attached to at least one of the plurality of elongated reinforcing elements.
15. The assembly of claim 1 , further comprising a second portion spaced from the portion by the plurality of elongated reinforcing elements.
16. The assembly of claim 15 , wherein the valve support further comprises a median zone located between the portion and the second portion, the median zone having a smaller diameter than the diameters of the portion and the second portion.
17. The assembly of claim 15 , wherein at least part of the implantable valve is located within the second portion, at least part of the second portion configured to be implanted in the proximal position with respect to the flow of blood through the assembly.
18. The assembly of claim 1 , wherein the portion is substantially tubular.
19. The assembly of claim 1 , wherein the heart valve prosthesis assembly is configured to permit lateral blood flow to the coronary ostia.
20. The assembly of claim 1 , wherein the portion is configured to be expanded at a target location to provide a seal between the portion and the anatomy of the implantation site.
21. The assembly of claim 1 , wherein the implantable valve is connected to the plurality of elongated reinforcing elements.
22. The assembly of claim 1 , wherein the plurality of elongated reinforcing elements are plastically deformable.
23. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs comprise a shape-retaining material.
24. The assembly of claim 1 , wherein the plurality of radially positioned anchoring prongs comprise a nickel and titanium alloy.
25. The assembly of claim 1 , wherein the plurality of elongated reinforcing elements comprise a rectilinear form at rest and wherein the assembly further comprises restraining means to limit the radial expansion of at least a portion of the plurality of elongated reinforcing elements when expanded in place.
26. The assembly of claim 1 , further comprising means for delivering and deploying said assembly.
27. The assembly of claim 26 , wherein the delivering and deploying means comprises a catheter.
28. The assembly of claim 27 , wherein the delivering and deploying means further comprises a sheath for maintaining the portion and the plurality of elongated reinforcing elements in a contracted configuration during delivery and at least one balloon for expanding the portion and the plurality of elongated reinforcing elements upon deployment.
29. The assembly of claim 27 , wherein the delivering and deploying means further comprises a proximal positioning means, dimensioned for bearing against the anatomy of the implantation site.
30. The assembly of claim 27 , wherein the catheter comprises a blood flow catheter, the blood flow catheter having a distal opening permitting blood flow past the assembly during implantation.