Replacement heart valve
First Claim
Patent Images
1. A mitral valve prosthesis configured to be deployed within a native mitral valve, the prosthesis comprising:
- an expandable frame configured to radially expand and collapse for deployment within the native mitral valve, the expandable frame having a proximal end, a distal end, and a transition portion between the proximal and the distal ends, the expandable frame comprising a row of diamond-shaped foreshortening cells configured to foreshorten upon radial expansion of the expandable frame, wherein, in an expanded configuration;
the proximal end has a first cross-sectional dimension;
the distal end has a second cross-sectional dimension greater than the first cross-sectional dimension; and
the transition portion increases in cross-sectional dimension between the first cross-sectional dimension and the second cross-sectional dimension, the transition portion forming a frustoconical shape;
a proximal anchoring portion sized to contact tissue on an atrial side of the native mitral valve when the prosthesis is deployed within the native mitral valve, the proximal anchoring portion comprising a plurality of free apices each connected to the expandable frame at a first base and at a second base, the first base and the second base spaced apart from one another and separated by a gap, the first and the second bases located distal of the proximal end of the expandable frame, wherein, in the expanded configuration, each free apex is positioned radially outwardly from the expandable frame;
a plurality of distal anchors sized to be positioned on a ventricular side of the native mitral valve when the prosthesis is deployed within the native mitral valve, each distal anchor connected to a distal apex of an individual cell of the row of diamond-shaped foreshortening cells, the transition portion positioned between the first and the second bases of the proximal anchoring portion and the distal apices of the individual cell of the row of diamond-shaped foreshortening cells connected to the distal anchor, wherein, in the expanded configuration;
each distal anchor extends from a portion of the expandable frame having a greater cross-sectional dimension than the portion of the expandable frame from which the proximal anchoring portion extends; and
an end of each distal anchor extends proximally and is positioned radially outwardly from the expandable frame; and
a valve body configured to open to allow flow in a direction from the proximal end to the distal end of the expandable frame and close so as to inhibit flow in a direction from the distal end to the proximal end of the expandable frame, the valve body extending along an entire length of the transition portion of the expandable frame, the valve body comprising a valve skirt extending circumferentially around an interior of the expandable frame and a plurality of valve leaflets positioned within the valve skirt,wherein;
the number of free apices and the number of distal anchors are the same;
the free apices of the proximal anchoring portion are circumferentially offset from ends of the plurality of distal anchors; and
when the prosthesis is deployed within the native mitral valve, a portion of the expandable frame having a cross-sectional dimension greater than the first cross-sectional dimension is configured to engage tissue of the native mitral valve.
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Accused Products
Abstract
A replacement heart valve can have an expandable frame configured to engage a native valve annulus. A valve body can be mounted onto the expandable frame to provide functionality similar to a natural valve. The valve body has an upstream end and a downstream end, and a diameter at the downstream end is greater than a diameter at the upstream end.
481 Citations
20 Claims
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1. A mitral valve prosthesis configured to be deployed within a native mitral valve, the prosthesis comprising:
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an expandable frame configured to radially expand and collapse for deployment within the native mitral valve, the expandable frame having a proximal end, a distal end, and a transition portion between the proximal and the distal ends, the expandable frame comprising a row of diamond-shaped foreshortening cells configured to foreshorten upon radial expansion of the expandable frame, wherein, in an expanded configuration; the proximal end has a first cross-sectional dimension; the distal end has a second cross-sectional dimension greater than the first cross-sectional dimension; and the transition portion increases in cross-sectional dimension between the first cross-sectional dimension and the second cross-sectional dimension, the transition portion forming a frustoconical shape; a proximal anchoring portion sized to contact tissue on an atrial side of the native mitral valve when the prosthesis is deployed within the native mitral valve, the proximal anchoring portion comprising a plurality of free apices each connected to the expandable frame at a first base and at a second base, the first base and the second base spaced apart from one another and separated by a gap, the first and the second bases located distal of the proximal end of the expandable frame, wherein, in the expanded configuration, each free apex is positioned radially outwardly from the expandable frame; a plurality of distal anchors sized to be positioned on a ventricular side of the native mitral valve when the prosthesis is deployed within the native mitral valve, each distal anchor connected to a distal apex of an individual cell of the row of diamond-shaped foreshortening cells, the transition portion positioned between the first and the second bases of the proximal anchoring portion and the distal apices of the individual cell of the row of diamond-shaped foreshortening cells connected to the distal anchor, wherein, in the expanded configuration; each distal anchor extends from a portion of the expandable frame having a greater cross-sectional dimension than the portion of the expandable frame from which the proximal anchoring portion extends; and an end of each distal anchor extends proximally and is positioned radially outwardly from the expandable frame; and a valve body configured to open to allow flow in a direction from the proximal end to the distal end of the expandable frame and close so as to inhibit flow in a direction from the distal end to the proximal end of the expandable frame, the valve body extending along an entire length of the transition portion of the expandable frame, the valve body comprising a valve skirt extending circumferentially around an interior of the expandable frame and a plurality of valve leaflets positioned within the valve skirt, wherein; the number of free apices and the number of distal anchors are the same; the free apices of the proximal anchoring portion are circumferentially offset from ends of the plurality of distal anchors; and when the prosthesis is deployed within the native mitral valve, a portion of the expandable frame having a cross-sectional dimension greater than the first cross-sectional dimension is configured to engage tissue of the native mitral valve. - View Dependent Claims (2, 3, 4, 5)
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6. A mitral valve prosthesis configured to be deployed within a native mitral valve, the prosthesis comprising:
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an expandable frame configured to radially expand and collapse for deployment within the native mitral valve, the expandable frame having a proximal end, a distal end, and a transition portion between the proximal and the distal ends, the expandable frame comprising a row of foreshortening cells configured to foreshorten upon radial expansion of the expandable frame, wherein, in an expanded configuration; the proximal end has a first cross-sectional dimension; the distal end has a second cross-sectional dimension greater than the first cross-sectional dimension; and the transition portion increases in cross-sectional dimension between the first cross-sectional dimension and the second cross-sectional dimension; a proximal anchoring portion sized to contact tissue on an atrial side of the native mitral valve when the prosthesis is deployed within the native mitral valve, the proximal anchoring portion comprising a plurality of free apices each connected to the expandable frame at a first base and at a second base, the first base and the second base spaced apparat from one another and separated by a gap, the first and the second bases located distal of the proximal end of the expandable frame, wherein, in the expanded configuration, each free apex is positioned radially outwardly from the expandable frame; a plurality of distal anchors sized to be positioned on a ventricular side of the native mitral valve when the prosthesis is deployed within the native mitral valve, each distal anchor connected to a distal portion of an individual cell of the row of diamond-shaped foreshortening cells, wherein, in the expanded configuration, an end of each distal anchor extends proximally and is positioned radially outwardly from the expandable frame; and a valve body configured to open to allow flow in a direction from the proximal end to the distal end of the expandable frame and close so as to inhibit flow in a direction from the distal end to the proximal end of the expandable frame, the valve body extending along an entire length of the transition portion of the expandable frame, the transition portion positioned between the first and the second bases of the proximal anchoring portion and distal ends of the distal anchors, wherein the valve body has a frustoconical shape such that a cross-sectional dimension of a distal end of the valve body is greater than a cross-sectional dimension of the proximal end of the valve body, the valve body comprising a valve skirt extending circumferentially around an interior of the frame and a plurality of valve leaflets positioned within the valve skirt, wherein, when the prosthesis is deployed within the native mitral valve, a portion of the expandable frame having a cross-sectional dimension greater than the first cross-sectional dimension is configured to engage tissue of the native mitral valve. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification