Device and method for treatment of heart valve regurgitation
First Claim
1. A method of treating mitral valve regurgitation, comprising:
- loading a prosthesis within a delivery catheter, the prosthesis including an anchoring portion and a coaptation portion, the coaptation portion having a radial cross section with a long axis and a short axis, a length of the long axis substantially longer than a width of the short axis, the coaptation portion comprising a support structure;
advancing the delivery catheter into a heart;
deploying the coaptation portion between leaflets of a mitral valve and at least a portion thereof within a mitral valve annulus, with the long axis of the radial cross section of the coaptation portion substantially aligned with a length between commissures of the mitral valve and the support structure pressing against the commissures;
securing the anchoring portion to a septal wall of the heart, the coaptation portion being supported by the anchoring portion for maintaining the position of the coaptation portion between the leaflets of the mitral valve; and
allowing backpressure from blood in a left ventricle to move the leaflets of the mitral valve to a closed position during systole,wherein the coaptation portion is configured to block gaps between the leaflets of the mitral valve when the leaflets are in the closed position for reducing regurgitation through the mitral valve during systole, andwherein the coaptation portion comprises an expandable pocket member, the expandable pocket member having a length along the long axis of the coaptation portion and a width along the short axis of the coaptation portion, during systole, the expandable pocket member expanding along the width thereof and substantially not expanding along the length thereof, and during diastole, the expandable pocket member contracts, with an open lower end of the pocket expanding and contracting during systole and diastole.
1 Assignment
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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.
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Citations
17 Claims
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1. A method of treating mitral valve regurgitation, comprising:
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loading a prosthesis within a delivery catheter, the prosthesis including an anchoring portion and a coaptation portion, the coaptation portion having a radial cross section with a long axis and a short axis, a length of the long axis substantially longer than a width of the short axis, the coaptation portion comprising a support structure; advancing the delivery catheter into a heart; deploying the coaptation portion between leaflets of a mitral valve and at least a portion thereof within a mitral valve annulus, with the long axis of the radial cross section of the coaptation portion substantially aligned with a length between commissures of the mitral valve and the support structure pressing against the commissures; securing the anchoring portion to a septal wall of the heart, the coaptation portion being supported by the anchoring portion for maintaining the position of the coaptation portion between the leaflets of the mitral valve; and allowing backpressure from blood in a left ventricle to move the leaflets of the mitral valve to a closed position during systole, wherein the coaptation portion is configured to block gaps between the leaflets of the mitral valve when the leaflets are in the closed position for reducing regurgitation through the mitral valve during systole, and wherein the coaptation portion comprises an expandable pocket member, the expandable pocket member having a length along the long axis of the coaptation portion and a width along the short axis of the coaptation portion, during systole, the expandable pocket member expanding along the width thereof and substantially not expanding along the length thereof, and during diastole, the expandable pocket member contracts, with an open lower end of the pocket expanding and contracting during systole and diastole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14, 15)
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9. A method of treating mitral valve regurgitation, comprising:
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loading a prosthesis within a delivery catheter, the prosthesis including an anchoring portion and a coaptation portion, the anchoring portion comprising a positioning arm, the positioning arm comprising a first end coupled to the coaptation portion and a second end comprising a base anchorable to a septal wall of a heart; advancing the delivery catheter into the heart; deploying the coaptation portion between leaflets of a mitral valve and through an annulus thereof, a long axis of a radial cross section of the coaptation portion substantially aligned between commissures of the mitral valve, the long axis substantially longer than a short axis of the radial cross section of the coaptation portion; and securing the base of the anchoring portion to the septal wall of the heart, the coaptation portion being supported by the anchoring portion for maintaining the coaptation portion between the leaflets of the mitral valve; wherein the coaptation portion is configured to block gaps between the leaflets of the mitral valve when the leaflets are closed for reducing regurgitation through the mitral valve during systole, and to permit blood flow therearound during diastole, and wherein the coaptation portion comprises an expandable pocket member, the expandable pocket member having a length along the long axis of the coaptation portion and a width along the short axis of the coaptation portion, during systole, the expandable pocket member expanding along the width thereof and substantially not expanding along the length thereof, and during diastole, the expandable pocket member contracts, with an open lower end of the pocket expanding and contracting during systole and diastole. - View Dependent Claims (10, 11, 12, 13, 16, 17)
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Specification