Collapsible-expandable prosthetic heart valves with structures for clamping native tissue
First Claim
Patent Images
1. A prosthetic heart valve comprising:
- an annular structure that is annularly continuous and that has an annular perimeter that is changeable in length between (1) a first relatively small length suitable for delivery of the valve into a patient with reduced invasiveness, and (2) a second relatively large length suitable for use of the annular structure to engage tissue of the patient adjacent to the patient'"'"'s native valve annulus and thereby implant the valve in the patient; and
a flexible leaflet structure attached to the annular structure;
wherein the annular structure comprises an annular array of diamond-shaped cells, upstream apex portions of at least some of the cells being resiliently biased to deflect radially outwardly from at least some other portion of the annular structure forming a line circumscribing the annular structure, and downstream apex portions of at least some of the cells being resiliently biased to deflect radially outwardly from said at least some other portion of the annular structure forming the line circumscribing the annular structure;
whereby, in use, tissue of the patient adjacent to the patient'"'"'s native valve annulus is clamped between the upstream and downstream apex portions, with the upstream apex portions engaging tissue upstream from the annulus, and with the downstream apex portions engaging tissue downstream from the annulus.
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Abstract
A prosthetic heart valve is designed to be circumferentially collapsible for less invasive delivery into the patient. At the implant site the valve re-expands to a larger circumferential size, i.e., the size that it has for operation as a replacement for one of the patient'"'"'s native heart valves. The valve includes structures that, at the implant site, extend radially outwardly to engage tissue structures above and below the native heart valve annulus. These radially outwardly extending structures clamp the native tissue between them and thereby help to anchor the prosthetic valve at the desired location in the patient.
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Citations
29 Claims
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1. A prosthetic heart valve comprising:
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an annular structure that is annularly continuous and that has an annular perimeter that is changeable in length between (1) a first relatively small length suitable for delivery of the valve into a patient with reduced invasiveness, and (2) a second relatively large length suitable for use of the annular structure to engage tissue of the patient adjacent to the patient'"'"'s native valve annulus and thereby implant the valve in the patient; and a flexible leaflet structure attached to the annular structure;
wherein the annular structure comprises an annular array of diamond-shaped cells, upstream apex portions of at least some of the cells being resiliently biased to deflect radially outwardly from at least some other portion of the annular structure forming a line circumscribing the annular structure, and downstream apex portions of at least some of the cells being resiliently biased to deflect radially outwardly from said at least some other portion of the annular structure forming the line circumscribing the annular structure;
whereby, in use, tissue of the patient adjacent to the patient'"'"'s native valve annulus is clamped between the upstream and downstream apex portions, with the upstream apex portions engaging tissue upstream from the annulus, and with the downstream apex portions engaging tissue downstream from the annulus. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9)
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3. (canceled)
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10. A prosthetic aortic valve comprising:
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an annular structure that is annularly continuous and that has an annular perimeter that is changeable in length between (1) a first relatively small length suitable for delivery of the valve into a patient with reduced invasiveness, and (2) a second relatively large length suitable for use of the annular structure to engage tissue of the patient adjacent to the patient'"'"'s native aortic valve annulus and also downstream from ostia of the patient'"'"'s coronary arteries to thereby implant the valve in the patient, the annular structure including an annularly continuous annulus portion adapted for implanting adjacent the patient'"'"'s native aortic valve annulus upstream from the ostia of the patient'"'"'s coronary arteries, and an annularly continuous aortic portion adapted for implanting in the patient'"'"'s aorta downstream from the ostia of the patient'"'"'s coronary arteries, the annulus portion and the aortic portion being connected to one another only by a plurality of linking structures that are disposed to pass through at least a portion of the patient'"'"'s valsava sinus at locations that are spaced from the ostia of the patient'"'"'s coronary arteries in a direction that extends annularly around the valsalva sinus; and a flexible leaflet structure attached to the annulus portion;
wherein the annulus portion includes first and second tissue clamping structures that are spaced from one another along an axis that passes longitudinally through the valve, each of the clamping structures being resiliently biased to extend radially outwardly from the leaflet structure about a common pivot point, whereby, in use, tissue of the patient adjacent to the patient'"'"'s native aortic valve annulus is clamped between the first and second clamping structures, with the first clamping structure engaging tissue upstream from the annulus, and with the second clamping structure engaging tissue downstream from the annulus. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A prosthetic aortic valve comprising:
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an annular structure that is annularly continuous and that has an annular perimeter that is changeable in length between (1) a first relatively small length suitable for delivery of the valve into a patient with reduced invasiveness, and (2) a second relatively large length suitable for use of the annular structure to engage tissue of the patient adjacent to the patient'"'"'s native aortic valve annulus and thereby implant the valve in the patient; and a flexible leaflet structure attached to the annular structure;
wherein, when implanted in the patient, any non-leaflet part of the valve that is at the level of the patient'"'"'s native coronary artery ostia confined in a direction that is circumferential of the valve to areas that are adjacent to the patient'"'"'s aortic valve commissures or downstream projections of those commissures, each of said areas having an extent in the circumferential direction that less than the distance in the circumferential direction between circumferentially adjacent ones of those areas; and
wherein the annular structure includes first and second tissue clamping structures that are spaced from one another along an axis that passes longitudinally through the valve, each of the clamping structures being resiliently biased to extend radially outwardly from a common pivot point of the leaflet structure, whereby, in use, tissue of the patient adjacent to the patient'"'"'s native aortic valve annulus is clamped between the first and second clamping structures, with the first clamping structure engaging tissue upstream from the annulus, and with the second clamping structure engaging tissue downstream from the annulus. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification