PROSTHETIC VALVE FOR REPLACING MITRAL VALVE
First Claim
1. A method for implanting a prosthetic valve at a mitral valve region of a heart, the mitral valve region having a native mitral annulus, the method comprising:
- delivering to the native mitral annulus a prosthetic valve comprising;
a frame having an expanded and a collapsed state, the frame having a longitudinal axis and comprising;
a main body having an atrial end and a ventricular end, the main body defining inner and outer surfaces;
a lower anchoring portion at the ventricular end of the main body that comprises a plurality of anchors, each of the anchors having a first end that is attached to the main body and a second end that is spaced from the first end; and
an upper anchoring portion at the atrial end of the main body that comprises an atrial portion configured to be positioned on an atrial side of the native mitral annulus, the atrial portion comprising a plurality of struts, the atrial portion having a first end that is attached to the main body and a second end that is spaced from the first end; and
a valve structure attached to the inner surface of the main body of the frame;
wherein when the frame is in the collapsed state, the upper and lower anchoring portions are oriented substantially along the longitudinal axis of the frame;
wherein when the frame transitions from the collapsed state to the expanded state, the lower anchoring portion transitions to a configuration that is no longer oriented substantially along the longitudinal axis of the frame; and
wherein the lower anchoring portion is configured to capture tissue at the ventricular side of the native mitral annulus between the lower anchoring portion and the outer surface of the main body as the frame transitions from the collapsed state to the expanded state; and
expanding the frame to anchor the prosthetic valve at the native mitral annulus.
1 Assignment
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Accused Products
Abstract
A prosthetic apparatus for implantation in a native mitral valve includes a main body for placement within the native mitral annulus. The main body is compressible to a radially compressed state for delivery into the heart and is self-expandable from the compressed state to a radially expanded state for implantation. A valve structure is mounted within a lumen of the main body and preferably forms three leaflets made of pericardium. An atrial sealing member is disposed along an atrial portion of the main body and ventricular anchors are coupled to a ventricular portion of the main body. The atrial sealing member impedes the flow of blood between the main body and the native annulus. The ventricular anchors are positioned outside the main body for capturing native mitral valve leaflets between the main body and the ventricular anchors.
86 Citations
45 Claims
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1. A method for implanting a prosthetic valve at a mitral valve region of a heart, the mitral valve region having a native mitral annulus, the method comprising:
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delivering to the native mitral annulus a prosthetic valve comprising; a frame having an expanded and a collapsed state, the frame having a longitudinal axis and comprising; a main body having an atrial end and a ventricular end, the main body defining inner and outer surfaces; a lower anchoring portion at the ventricular end of the main body that comprises a plurality of anchors, each of the anchors having a first end that is attached to the main body and a second end that is spaced from the first end; and an upper anchoring portion at the atrial end of the main body that comprises an atrial portion configured to be positioned on an atrial side of the native mitral annulus, the atrial portion comprising a plurality of struts, the atrial portion having a first end that is attached to the main body and a second end that is spaced from the first end; and a valve structure attached to the inner surface of the main body of the frame; wherein when the frame is in the collapsed state, the upper and lower anchoring portions are oriented substantially along the longitudinal axis of the frame; wherein when the frame transitions from the collapsed state to the expanded state, the lower anchoring portion transitions to a configuration that is no longer oriented substantially along the longitudinal axis of the frame; and wherein the lower anchoring portion is configured to capture tissue at the ventricular side of the native mitral annulus between the lower anchoring portion and the outer surface of the main body as the frame transitions from the collapsed state to the expanded state; and expanding the frame to anchor the prosthetic valve at the native mitral annulus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36)
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15. A method for implanting a prosthetic valve at a mitral valve region of a heart, the mitral valve region having a native mitral annulus, the method comprising:
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delivering to the native mitral annulus a prosthetic valve comprising; a frame having an expanded and a collapsed state, the frame having a longitudinal axis and comprising; a main body having an atrial end and a ventricular end, the main body defining inner and outer surfaces; a lower anchoring portion at the ventricular end of the main body that comprises a plurality of anchors, each of the anchors having a first end that is attached to the main body and a second end that is spaced from the first end; and an upper anchoring portion at the atrial end of the main body that comprises an atrial portion configured to be positioned on an atrial side of the native mitral annulus, the atrial portion comprising a plurality of struts, the atrial portion having a first end that is attached to the main body and a second end that is spaced from the first end; and a valve structure attached to the inner surface of the main body of the frame; wherein when the frame is in the collapsed state, the upper and lower anchoring portions are oriented substantially along the longitudinal axis of the frame; wherein when the frame transitions from the collapsed state to the expanded state, the lower anchoring portion transitions to a configuration having a different orientation than when the frame is in the collapsed state; and wherein the lower anchoring portion is configured to capture tissue at the ventricular side of the native mitral annulus between the lower anchoring portion and the outer surface of the main body as the frame transitions from the collapsed state to the expanded state; and expanding the frame to anchor the prosthetic valve at the native mitral annulus. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37)
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38. A method for replacing a damaged or diseased mitral valve in a subject comprising:
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delivering to the mitral valve annulus of said subject a valve prosthesis that comprises a stent having an expanded and an unexpanded state and that includes a long axis; a middle region having first and second ends and comprising a framework that defines inner and outer surfaces; a lower flange portion at the first end of the middle region that comprises a plurality of flange elements, each of said elements having a first end that is attached to the middle region and an opposed second end that is spaced from the first end; and, an upper flange portion at the second end of the middle region that comprises a plurality of flange elements, each of said elements having a first end that is attached to the middle region and an opposed second end that is spaced from the first end; and, a valve that is attached to the inner surface of the middle region of the stent, wherein, when said stent is in the unexpanded state, the upper and lower flange portions are oriented substantially along the long axis of the stent; when said stent transitions from the unexpanded state to the expanded state, the lower flange portion transitions in space so that it is no longer oriented substantially along the long axis of the stent; and
,the lower flange portion grasps tissue at the ventricular side of the annulus by enfolding it between the lower flange portion and the outer surface of the middle region as the stent transitions from the unexpanded state to the expanded state and, expanding said stent to anchor the prosthesis at the mitral valve annulus. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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Specification