Prosthetic valve
First Claim
Patent Images
1. A prosthetic valve comprising:
- an annular member defining a valve seat around an aperture; and
an obturating flap having a major area thereof in the form of a rigid sheet with a substantially straight edge portion, and having a minor area thereof in the form of a flexible sheet extending from along the whole length of said edge portion and connecting the flap to said member to serve as a hinge;
said flap being movable about said hinge between positions in which the flap is respectively engaged and disengaged with said seat to close and open said aperture, and said major area being of similar shape and extent to said seat so that the forces acting on said flap, when closed, are transmitted to said annular member predominantly through said rigid sheet.
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Abstract
A prosthetic valve, suitable for use as a mitral valve replacement, has a D-shaped annular seat-forming member and obturating flap, the flap having a major area formed by a rigid sheet of similar D-shape and extent for direct support on the seat when the valve is closed, and a flexible sheet hinge connecting the flap and annular member as a hinge along their straight edge portions. The rigid sheet is preferably scalloped around its free edge, with a flexible skirt being located across the incursions of this shaping, and is also preferably dished inwardly towards the valve.
209 Citations
11 Claims
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1. A prosthetic valve comprising:
- an annular member defining a valve seat around an aperture; and
an obturating flap having a major area thereof in the form of a rigid sheet with a substantially straight edge portion, and having a minor area thereof in the form of a flexible sheet extending from along the whole length of said edge portion and connecting the flap to said member to serve as a hinge;said flap being movable about said hinge between positions in which the flap is respectively engaged and disengaged with said seat to close and open said aperture, and said major area being of similar shape and extent to said seat so that the forces acting on said flap, when closed, are transmitted to said annular member predominantly through said rigid sheet. - View Dependent Claims (2, 3, 4, 5)
- an annular member defining a valve seat around an aperture; and
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6. A prosthetic valve comprising:
- an annular member defining a valve seat around an aperture; and
an obturating flap having a major area thereof in the form of a rigid sheet with a substantially straight edge portion and a scalloped remaining edge portion, a first minor area thereof in the form of a flexible sheet extending from along the whole length of said straight edge portion and connecting the flap to said annular member to serve as a hinge, and secondary minor areas of flexible sheet material extending across the incursions of said scalloped edge portion, said flap being movable about said hinge between positions in which the flap is respectively engaged and disengaged with said seat to close and open said aperture, and said major area being of similar overall shape and extent to said seat so that the forces acting on said flap, when closed, are transmitted to said annular member predominantly through said rigid sheet. - View Dependent Claims (7, 8)
- an annular member defining a valve seat around an aperture; and
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9. A prosthetic valve comprising:
- an annular member defining a valve seat around an aperture; and
an obturating flap having a major area thereof in the form of a rigid sheet with a substantially straight edge portion, and having a minor area thereof in the form of a flexible sheet extending from along the whole length of said edge portion and connecting the flap to said member to serve as a hinge, said hinge being formed with a plurality of transverse slits therethrough, said flap being movable about said hinge between positions in which the flap is respectively engaged and disengaged with said seat to close and open said aperture, and said major area being of similar shape and extent to said seat so that the forces acting on said flap, when closed, are transmitted to said annular member predominantly through said rigid sheet.
- an annular member defining a valve seat around an aperture; and
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10. A prosthetic valve comprising:
- an annular member defining a valve seat around an aperture;
an obturating flap having a major area thereof in the form of a dished rigid sheet with a straight edge portion and wholly coated with a flexible impermeable material; and
a hinge defined by an extension of said sheet coat material from along the whole length of said straight edge portion connecting said flap to said member with said dished major area providing opposed faces of convex and concave form respectively facing towards and away from said annular member;
said flap being movable about said hinge between positions in which the flap is respectively engaged and disengaged with said seat to close and open said aperture, and said major area being of similar shape and extent to said seat so that the forces acting on said flap, when closed, are transmitted to said annular member predominantly through said rigid sheet. - View Dependent Claims (11)
- an annular member defining a valve seat around an aperture;
Specification