Valve apparatus, system and method
A venous valve with a frame and a cover on the frame for unidirectional flow of a liquid through the valve.
1. A valve having an inflow end, an outflow end, and a longitudinal axis extending therebetween, the valve comprising:
a valve frame comprising:
a first tubular ring proximate the inflow end;
a second tubular ring proximate the outflow end and longitudinally spaced apart from the first tubular ring; and
a plurality of frame members extending between the first tubular ring and the second tubular ring, the plurality of frame members defining openings through the valve frame; and
at least two valve leaflets coupled to the valve frame, the at least two valve leaflets being configured to reversibly shift between an open configuration wherein free ends of the at least two valve leaflets are spread apart thereby permitting fluid flow through the valve and a closed configuration wherein the free ends of the at least two valve leaflets converge thereby limiting fluid flow through the valve;
wherein the plurality of valve leaflets move through the openings defined by the plurality of frame members when shifting between the open configuration and the closed configuration.
2. The valve of claim 1 , wherein the first tubular ring includes one or more anchoring elements projecting therefrom.
3. The valve of claim 2 , wherein the one or more anchoring elements project from the inflow end of the first tubular ring.
4. The valve of claim 1 , wherein the second tubular ring includes one or more anchoring elements projecting therefrom.
5. The valve of claim 4 , wherein the one or more anchoring elements project from the outflow end of the first tubular ring.
6. The valve of claim 1 , wherein the plurality of frame members includes a first frame member and a second frame member, the first frame member and the second frame member merging together at a longitudinal position between the first tubular ring and the second tubular ring such that the first frame member and the second frame member attach to one of the first tubular ring and the second tubular ring at a single location.
7. The valve of claim 6 , wherein the first frame member and the second frame member merge together adjacent the second tubular ring to form a leaflet connection region.
8. The valve of claim 7 , wherein at least one of the at least two leaflets is coupled to the leaflet connection region.
9. The valve of claim 1 , wherein the at least two leaflets each include integrated support members embedded therein.
10. The valve of claim 9 , wherein the integrated support members are oriented circumferentially relative to the longitudinal axis.
11. The valve of claim 9 , wherein the at least two leaflets are formed of a first material and the integrated support members are formed of a second material different from the first material.
12. The valve of claim 1 , wherein the first tubular ring includes a plurality of first end portions that lay on a common plane.
13. The valve of claim 1 , wherein the second tubular ring includes a plurality of second end portions that lay on a common plane.
14. The valve of claim 1 , wherein the valve frame is a unitary structure.
15. The valve of claim 14 , wherein the valve frame is self-expanding.
16. The valve of claim 1 , wherein the valve frame is configured to move between a radially collapsed state and a radially expanded state.
17. The valve of claim 1 , wherein the at least two leaflets each having a concave structure in the closed configuration.