Prosthetic mitral heart valve
First Claim
1. A prosthetic heart valve comprising:
- a support formed with a base ring defining a ring plane, of noncircular shape, and having a relatively long major axis and a relatively short minor axis perpendicular to the major axis and defined by short and long minor subaxes meeting at the major axis;
a pair of arcuate walls projecting transversely of the plane from the base ring generally to respective sides of the major axis, meeting at points directed away from the base ring, and having arcuate edges extending between the points, one of the walls forming a larger arc than the other of the walls, the walls being shaped such that a point plane including a line connecting the points and the major axis forms with a plane including the major axis and perpendicular to the ring plane an angle of between 10° and
20°
; and
respective flexible valve cusps attached to the edges, the valve cusp attached to the edge of the smaller-arc wall being of smaller surface area than and inclined at a more obtuse angle to the ring plane than the valve cusp attached to the edge of the larger-arc wall.
1 Assignment
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Accused Products
Abstract
The invention relates to a prosthetic mitral heart valve consisting of a support housing (10) comprising a base ring (15) supporting two posts which point essentially in the direction of the ring axis and which are connected by arc-shaped walls (13, 14), these walls being used to fix two flexible leaflets. The free ends of said posts form an inner support for the leaflet. The base ring, as seen from above, has a closed, noncircular shape with a common longitudinal axis but two different-sized semi lateral axes. The posts lie on the longitudinal axis and form the transitional point from one half of the shape to the other. The invention provides that in order to avoid undercuts which can contribute to turbulence, the plane in which the connection line (17) between the tips of the posts (18, 19), and the common longitudinal axis of the post base ring shape lie is tilted at an angle (α) of 10° to 20°, preferably 15°, in relation to the plane that leads through the common longitudinal axis and lies vertically in relation to the surface (21) formed by the base ring; and the wall with the greater curvature supports the leaflet with the smaller surface (the mural leaflet), positioned at a greater angle to the surface formed by the base ring compared to the wall with the greater curvature.
196 Citations
8 Claims
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1. A prosthetic heart valve comprising:
-
a support formed with a base ring defining a ring plane, of noncircular shape, and having a relatively long major axis and a relatively short minor axis perpendicular to the major axis and defined by short and long minor subaxes meeting at the major axis;
a pair of arcuate walls projecting transversely of the plane from the base ring generally to respective sides of the major axis, meeting at points directed away from the base ring, and having arcuate edges extending between the points, one of the walls forming a larger arc than the other of the walls, the walls being shaped such that a point plane including a line connecting the points and the major axis forms with a plane including the major axis and perpendicular to the ring plane an angle of between 10° and
20°
; and
respective flexible valve cusps attached to the edges, the valve cusp attached to the edge of the smaller-arc wall being of smaller surface area than and inclined at a more obtuse angle to the ring plane than the valve cusp attached to the edge of the larger-arc wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification