Device and method for treatment of heart valve regurgitation
First Claim
1. A device for treating mitral valve regurgitation comprising:
- a coaptation member having an elongated cross-sectional profile wherein a width in a first radial direction is substantially smaller than a length in a second radial direction, the elongated shape sized for placement at least partially between leaflets of a native mitral valve, said coaptation member adapted for expansion in said first radial direction for increasing said width while said length remains substantially constant and wherein said expansion of said coaptation member in said first radial direction restricts blood flow between said leaflets and said coaptation member and wherein a contraction of said coaptation member in said first radial direction allows blood to flow between said leaflets and said coaptation member;
a support structure coupled to said coaptation member, the support structure constructed to provide said coaptation member with said elongated cross-sectional profile, andan anchoring structure comprising an anchoring wire that comprises a plurality of loops formed of a shape memory material, said anchoring structure connected to said coaptation member, said anchoring structure having a compressed state sized to fit within a delivery catheter and an expanded state sized to conform to a left atrium for fixation along an inner wall of the left atrium.
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Accused Products
Abstract
In one embodiment, the present invention provides a prosthesis that can be implanted within a heart to at least partially block gaps that may be present between the two mitral valve leaflets. In one preferred embodiment, the prosthesis includes an anchoring ring that expands within the left atrium to anchor the prosthesis and a pocket member fixed to the anchoring ring. The pocket member is positioned within the mitral valve, between the leaflets so that an open end of the pocket member is positioned within the left ventricle. When the mitral valve is open, blood flows past the pocket member, maintaining the pocket member in a collapsed state. When the mitral valve closes, the backpressure of the blood pushes into the pocket member, expanding the pocket member to an inflated shape. The mitral valve leaflets contact the expanded pocket member, allowing the prosthesis to block at least a portion of the openings between the leaflets, thereby minimizing regurgitated blood flow into the left atrium.
285 Citations
12 Claims
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1. A device for treating mitral valve regurgitation comprising:
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a coaptation member having an elongated cross-sectional profile wherein a width in a first radial direction is substantially smaller than a length in a second radial direction, the elongated shape sized for placement at least partially between leaflets of a native mitral valve, said coaptation member adapted for expansion in said first radial direction for increasing said width while said length remains substantially constant and wherein said expansion of said coaptation member in said first radial direction restricts blood flow between said leaflets and said coaptation member and wherein a contraction of said coaptation member in said first radial direction allows blood to flow between said leaflets and said coaptation member; a support structure coupled to said coaptation member, the support structure constructed to provide said coaptation member with said elongated cross-sectional profile, and an anchoring structure comprising an anchoring wire that comprises a plurality of loops formed of a shape memory material, said anchoring structure connected to said coaptation member, said anchoring structure having a compressed state sized to fit within a delivery catheter and an expanded state sized to conform to a left atrium for fixation along an inner wall of the left atrium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification