Percutaneously-deliverable mechanical valve
Apparatus for regulating blood flow of a subject is provided, the apparatus comprising a prosthetic valve ( 20 ) that comprises a tubular element ( 22 ), shaped to define a lumen ( 23 ) therethrough, and a valve member ( 24 ), configured to be coupled to the tubular element ( 22 ) and to be disposed within the lumen ( 23 ). The prosthetic valve ( 20 ) has (1) a compressed configuration in which the lumen ( 23 ) has a compressed width, the valve member ( 24 ) is generally cylindrical, and the prosthetic valve ( 20 ) is configured to be percutaneously delivered into the subject, and (2) an expanded configuration in which the lumen ( 23 ) has an expanded width that is greater than the compressed width, and the valve member ( 24 ) is generally disc-shaped, is coupled to the tubular element ( 22 ), and is disposed within the lumen ( 23 ). Other embodiments are also described.
1. Apparatus for regulating blood flow of a subject, the apparatus comprising:
a transluminally-implantable tilting-disc valve, the tilting-disc valve comprising:
a frame:
defining an arrangement of cells that shape the frame as a tubular element having a first end and a second end;
having a compressed state in which the frame is generally cylindrical, has a compressed width, and is transluminally deliverable into the subject, and
having an expanded state in which the frame is generally cylindrical, has an expanded width that is greater than the compressed width, and defines a lumen between the first end and the second end; and
a valve member:
coupled to the frame,
disposed within the lumen in both the compressed and expanded states of the first frame,
having a compressed state, and
having an expanded state in which the valve member:
is disc-shaped, and
provides directional fluid flow through the lumen by tilting in response to changes in relative fluid pressure between the first end and the second end, such that at least part of the valve member moves toward the first end and at least part of the valve member moves toward the second end.
2. The apparatus according to claim 1 , wherein the valve member provides directional fluid flow through the lumen without changing shape in response to changes in relative fluid pressure between the first end and the second end.
3. The apparatus according to claim 1 , wherein the prosthetic valve further comprises a valve seat that protrudes into the lumen and facilitates sealing between the tubular element and the valve member.
4. The apparatus according to claim 3 , wherein the valve seat is annular.
5. The apparatus according to claim 3 , wherein the valve seat is a first arc-shaped valve seat, and wherein the prosthetic valve further comprises a second arc-shaped valve seat.
6. The apparatus according to claim 1 , wherein the valve member is coupled to the first frame at two coupling points.
7. The apparatus according to claim 6 , wherein the coupling points lie on a central transverse axis of the tubular element.
8. The apparatus according to claim 6 , wherein the coupling points lie on a non-central transverse axis of the tubular element.
9. The apparatus according to claim 6 , wherein the valve member provides directional fluid flow by the valve member rotating around an axis between the two coupling points in response to changes in relative fluid pressure between the first end and the second end.
10. The apparatus according to claim 6 , wherein each of the coupling points comprises a hinge.
11. The apparatus according to claim 10 , wherein each hinge is formed by a protrusion defined by the valve member protruding into a slot defined by the frame.
12. The apparatus according to claim 1 , wherein the valve member is unevenly rigid.
13. The apparatus according to claim 1 , wherein:
the frame is a first frame,
the valve member comprises a second frame and a covering,
in the expanded state of the valve member, the second frame has an inner edge that defines an opening, and the covering covers the second frame and the opening.