Disk-based valve apparatus and method for the treatment of valve dysfunction
The present invention comprises a novel and safer mechanism of deployment using a self-positioning, self-centering, and self-anchoring method. To embody the present invention, a disk-based valve apparatus allowing the repositioning and retrieval of the implantable valve while working on a dysfunctional valve structure is disclosed. The disk-based valve apparatus may comprise one or more disks, either proximal or distal, a valve-housing component and a valve component. The one or more disks may be either proximal or distal, may be either connected to each other or disconnected from each other and may either be symmetrical or have different shapes and dimensions. The disk-based valve apparatus may be self anchoring, such as anchored by pressure from the one or more disk, or may be anchored using any anchoring.
1. A valve prosthesis having a constrained shape and an expanded shape, the valve prosthesis comprising a replacement valve attached to an anchor, the anchor comprising:
a proximal portion adapted and configured to self-expand from the constrained shape into the expanded shape, the proximal portion comprising a plurality of wire petals disposed in an overlapping arrangement and of shape memory material;
a distal portion adapted and configured to self-expand from the constrained shape to the expanded shape; and
a central portion disposed between, and connected to, the proximal portion and the distal portion, the central portion having a diameter in the expanded shape smaller than diameters of the proximal portion and the distal portion in their expanded shapes, the central portion being adapted to self-expand to move the proximal portion and the distal portion toward each other to compress native cardiac tissue between them.
2. The valve prosthesis of claim 1 wherein the distal portion comprises a plurality of wire petals of shape memory material.
3. The valve prosthesis of claim 2 wherein the plurality of wire petals of the distal portion are disposed in an overlapping arrangement.
4. The valve prosthesis of claim 1 wherein the distal portion comprises a notch or gap adapted to accommodate cardiac structures adjacent the native valve tissue.
5. The valve prosthesis of claim 1 wherein the anchor further comprises a plurality of hooks.
6. A valve prosthesis having a constrained shape and an expanded shape, the valve prosthesis comprising a replacement valve attached to an anchor, the anchor comprising:
a proximal portion adapted and configured to self-expand from the constrained shape into the expanded shape, the proximal portion comprising a plurality of wire petals disposed in an overlapping arrangement and of shape memory material;
a distal portion adapted and configured to self-expand from the constrained shape to the expanded shape, the distal portion comprising a plurality of wire petals disposed in an overlapping arrangement and of shape memory material; and
a central portion disposed between, and connected to, the proximal portion and the distal portion, the central portion having a diameter in the expanded shape smaller than diameters of the proximal portion and the distal portion in their expanded shapes, the central portion being adapted to self-expand to move the proximal portion and the distal portion toward each other to compress native cardiac tissue between them.
7. The valve prosthesis of claim 6 wherein the distal portion comprises a notch or gap adapted to accommodate cardiac structures adjacent the native valve tissue.
8. The valve prosthesis of claim 6 wherein the anchor further comprises a plurality of hooks.