US6682559B2
Expired / Lapsed
US
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Prosthetic heart valve
Assignee: Medtronic 3F Therapeutics Inc
•
Filing: 2001-01-29
•
Granted: 2004-01-27
•
Expires: 2021-01-29
Abstract
Abstract A tubular prosthetic semilunar or atrioventricular heart valve is formed by cutting flat, flexible leaflets according to a pattern. The valve is constructed by aligning the side edges of adjacent leaflets so that the leaflet inner faces engage each other, and then suturing the leaflets together with successive stitches along a fold line adjacent the side edges. During operation, when the leaflets open and close, the leaflets fold along the fold line. Distal tabs extend beyond the distal end of each leaflet. The tab portions of adjacent leaflets are folded over each other and sewn together to form commissural attachment tabs. The commissural tabs provide commissural attachment points to accommodate sutures and the like in order to secure the tab to a vessel wall, if a semilunar valve, and papillary muscles and/or chordae tendineae, if an atrioventricular valve.
Inventors
- 👤 Keith Myers
- 👤 Christine Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; A61F2220/00; A61F2220/0025; A61F2220/0075; A61L; A61L2300/00; A61L2300/60; A61L2300/64
Claims Analysis
Total Claims: 80
Claim 1
Independent Claim
153 words
A stentless prosthetic heart valve, comprising: a plurality of thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, and side edges, the plurality of leaflets being sewn directly together along at least a portion of their side edges so as to form a substantially tubular valve structure having an in-flow end and an out-flow end, adjacent leaflets being arranged so that their side edges are substantially aligned and the inner faces of the leaflets engage each other adjacent the side edges, wherein the valve structure is movable between a closed position in which the out-flow edges of adjacent leaflets engage each other, and an open position in which the out-flow edges of adjacent leaflets are separated from each other except along the side edges, the sewn portions of the side edges of the leaflets biasing the leaflets toward a partially closed position.
Claim 2
Dependent Claim
153 words
A stentless prosthetic heart valve, comprising: a plurality of thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, and side edges, the plurality of leaflets being sewn directly together along at least a portion of their side edges so as to form a substantially tubular valve structure having an in-flow end and an out-flow end, adjacent leaflets being arranged so that their side edges are substantially aligned and the inner faces of the leaflets engage each other adjacent the side edges, wherein the valve structure is movable between a closed position in which the out-flow edges of adjacent leaflets engage each other, and an open position in which the out-flow edges of adjacent leaflets are separated from each other except along the side edges, the sewn portions of the side edges of the leaflets biasing the leaflets toward a partially closed position.
Claim 3
Dependent Claim
23 words
A heart valve as in claim 1 , wherein the aligned leaflet side edges extend generally outwardly from the substantially tubular valve structure.
Claim 4
Dependent Claim
22 words
A heart valve as in claim 1 , wherein each of the leaflets comprises a tab portion adjacent the leaflet out-flow edge.
Claim 5
Dependent Claim
21 words
A heart valve as in claim 3 , wherein each tab portion extends beyond the out-flow edge of a corresponding leaflet.
Claim 6
Dependent Claim
23 words
A heart valve as in claim 3 , wherein the tab portions are disposed adjacent at least one of the leaflet side edges.
Claim 7
Dependent Claim
19 words
A heart valve as in claim 5 , wherein a tab portion is formed adjacent each leaflet side edge.
Claim 8
Dependent Claim
25 words
A heart valve as in claim 6 , wherein the tab portions of adjacent leaflets are connected to each other to form commissural attachment tabs.
Claim 9
Dependent Claim
21 words
A heart valve as in claim 7 , wherein the connected tab portions are at least partially folded over each other.
Claim 10
Dependent Claim
16 words
A heart valve as in claim 7 additionally comprising reinforcement material over the commissural attachment tabs.
Claim 11
Dependent Claim
23 words
A heart valve as in claim 7 , wherein the commissural tabs extend distally beyond the out-flow end of the tubular valve structure.
Claim 12
Dependent Claim
33 words
A heart valve as in claim 6 , wherein each commissural tab substantially lies in a plane generally tangential to the tubular valve structure when the valve structure is in the open position.
Claim 13
Dependent Claim
16 words
A heart valve as in claim 1 , wherein each of the leaflets are substantially identical.
Claim 14
Dependent Claim
39 words
A heart valve as in claim 1 comprising a first leaflet and a second leaflet, and a width of the in-flow edge of the first leaflet is greater than a width of the in-flow edge of the second leaflet.
Claim 15
Dependent Claim
34 words
A heart valve as in claim 13 , wherein a width of the out-flow edge of the first leaflet is substantially the same as a width of the out-flow edge of the second leaflet.
Claim 16
Dependent Claim
19 words
A heart valve as in claim a additionally comprising a cloth reinforcement member attached to the valve in-flow end.
Claim 17
Dependent Claim
105 words
A stentless semilunar heart valve, comprising: three thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, side edges, and tab portions extending outwardly beyond the side edges and positioned adjacent the out-flow edge, the leaflets being sewn directly to each other along their side edges so as to form a substantially tubular valve structure having an in-flow and an out-flow end; wherein the tab portions of adjacent leaflets engage each other to form commissural attachment tabs, at least a portion of each commissural attachment tab being adjacent the outer faces of the adjacent leaflets.
Claim 18
Dependent Claim
105 words
A stentless semilunar heart valve, comprising: three thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, side edges, and tab portions extending outwardly beyond the side edges and positioned adjacent the out-flow edge, the leaflets being sewn directly to each other along their side edges so as to form a substantially tubular valve structure having an in-flow and an out-flow end; wherein the tab portions of adjacent leaflets engage each other to form commissural attachment tabs, at least a portion of each commissural attachment tab being adjacent the outer faces of the adjacent leaflets.
Claim 19
Dependent Claim
19 words
A semilunar heart valve as in claim 16 , wherein the three leaflets are substantially identical to each other.
Claim 20
Dependent Claim
49 words
A semilunar heart valve as in claim 16 , wherein adjacent leaflets are arranged so that their side edges are substantially aligned and the leaflet inner faces engage each other adjacent the side edges, and a plurality of stitches are disposed along a line adjacent the aligned side edges.
Claim 21
Dependent Claim
26 words
A semilunar heart valve as in claim 18 , wherein a portion of a line adjacent the out-flow edges of the leaflets has no stitches therein.
Claim 22
Dependent Claim
27 words
A semilunar heart valve as in claim 16 , wherein the tab portions of adjacent leaflets overlap each other so that each commissural tab has multiple layers.
Claim 23
Dependent Claim
20 words
A semilunar heart valve as in claim 20 additionally comprising a cloth reinforcement member attached to the commissural attachment tabs.
Claim 24
Dependent Claim
33 words
A semilunar heart valve as in claim 16 , wherein a diameter of the inflow end of the valve structure is greater than a diameter of the out-flow end of the valve structure.
Claim 25
Dependent Claim
24 words
A semilunar heart valve as in claim 16 , wherein the in-flow edge and out-flow edge of each leaflet has a substantially scalloped shaped.
Claim 26
Dependent Claim
36 words
A semilunar heart valve as in claim 23 , wherein a center portion of the in-flow edge of each leaflet extends a distance proximal of a position at which the side edge meets the in-flow edge.
Claim 27
Dependent Claim
34 words
A semilunar heart valve as in claim 24 , wherein a center portion of the out-flow edge of each leaflet extends a proximal of a position which the side edge meets the out-flow edge.
Claim 28
Dependent Claim
197 words
A stentless heart valve, comprising: a first leaflet comprising a leaflet main body having an inner face, an outer face, a proximal end, a distal end, a first side edge, and a first tab portion adjacent the distal end and extending outwardly from the first side edge, the first tab portion connected to the first leaflet main body through a first neck portion; and a second leaflet comprising a leaflet main body having an inner face, an outer face, a proximal end, a distal end, a second side edge, and a second tab portion adjacent the distal end extending from the second side edge, the second tab portion having a longitudinal slot and connected to the second leaflet main body through a second neck portion; the first side edge of the first leaflet and the second side edge of the second leaflet being substantially aligned with and attached to one another and the inner faces of the first leaflet and the second leaflet engaging each other adjacent the aligned side edges; and wherein the second tab portion is folded so that the first and second neck portions extend through the longitudinal slot of the second tab portion.
Claim 29
Dependent Claim
197 words
A stentless heart valve, comprising: a first leaflet comprising a leaflet main body having an inner face, an outer face, a proximal end, a distal end, a first side edge, and a first tab portion adjacent the distal end and extending outwardly from the first side edge, the first tab portion connected to the first leaflet main body through a first neck portion; and a second leaflet comprising a leaflet main body having an inner face, an outer face, a proximal end, a distal end, a second side edge, and a second tab portion adjacent the distal end extending from the second side edge, the second tab portion having a longitudinal slot and connected to the second leaflet main body through a second neck portion; the first side edge of the first leaflet and the second side edge of the second leaflet being substantially aligned with and attached to one another and the inner faces of the first leaflet and the second leaflet engaging each other adjacent the aligned side edges; and wherein the second tab portion is folded so that the first and second neck portions extend through the longitudinal slot of the second tab portion.
Claim 30
Dependent Claim
20 words
A heart valve as in claim 26 , wherein the first tab portion is folded over the second tab portion.
Claim 31
Dependent Claim
18 words
A heart valve as in claim 26 , wherein the first and second neck portions are not stitched.
Claim 32
Dependent Claim
24 words
A heart valve as in claim 26 , wherein the first and second tab portions are sewn together to form a commissural attachment tab.
Claim 33
Dependent Claim
26 words
A heart valve as in claim 29 , wherein the commissural attachment tab is adapted to be attached to an inner wall of a blood vessel.
Claim 34
Dependent Claim
21 words
A heart valve as in claim 26 , wherein the tabs, neck and main body of each leaflet are unitarily formed.
Claim 35
Dependent Claim
19 words
A heart valve as in claim 26 , wherein the proximal and distal ends of he leaflet are scalloped.
Claim 36
Independent Claim
106 words
A method for making a stentless tubular prosthetic hear valve, comprising: providing a section of substantially flat, flexible material; cutting a plurality of leaflets out of the flat material, each of the leaflets having an inner face, an outer face, a proximal end, a distal end, side edges, and tab portions adjacent the distal end and tending from the side edges; aligning the side edges of adjacent leaflets together so that the inner faces of adjacent leaflets engage each other adjacent the side edges; and sewing aligned side edges together so as to form a substantially tubular valve structure having an in-flow and an out-flow end.
Claim 37
Independent Claim
106 words
A method for making a stentless tubular prosthetic hear valve, comprising: providing a section of substantially flat, flexible material; cutting a plurality of leaflets out of the flat material, each of the leaflets having an inner face, an outer face, a proximal end, a distal end, side edges, and tab portions adjacent the distal end and tending from the side edges; aligning the side edges of adjacent leaflets together so that the inner faces of adjacent leaflets engage each other adjacent the side edges; and sewing aligned side edges together so as to form a substantially tubular valve structure having an in-flow and an out-flow end.
Claim 38
Dependent Claim
25 words
The method of claim 33 , wherein providing a section of substantially flat, flexible material involves providing a section of pericardium and fixing the pericardium.
Claim 39
Dependent Claim
12 words
The method of claim 34 , wherein the material is equine pericardium.
Claim 40
Dependent Claim
19 words
The method of claim 33 , wherein cutting a plurality of leaflets is accomplished using a non-contact cutting apparatus.
Claim 41
Dependent Claim
17 words
The method of claim 36 , wherein cutting a plurality of leaflets is accomplished using a laser.
Claim 42
Dependent Claim
19 words
The method of claim 33 additionally comprising folding the tab portions of the leaflets to form a commissural tab.
Claim 43
Independent Claim
79 words
A method of manufacturing a stentless prosthetic heart valve comprising: providing a first valve leaflet and a second valve leaflet, the leaflets being formed separately from each other; placing a portion of an inward face of the first valve leaflet against a corresponding portion of an inward face of the second valve leaflet; and attaching the inward face portions to each other wherein the inward face portions of the leaflets are attached at the side edges of the leaflets.
Claim 44
Independent Claim
79 words
A method of manufacturing a stentless prosthetic heart valve comprising: providing a first valve leaflet and a second valve leaflet, the leaflets being formed separately from each other; placing a portion of an inward face of the first valve leaflet against a corresponding portion of an inward face of the second valve leaflet; and attaching the inward face portions to each other wherein the inward face portions of the leaflets are attached at the side edges of the leaflets.
Claim 45
Dependent Claim
14 words
The method of claim 39 additionally comprising forming the valve leaflets from equine pericardium.
Claim 46
Independent Claim
91 words
The method of manufacturing a stentless prosthetic valve comprising providing first and second valve leaflets each having an integral tab portion at an end thereof; and folding the tab portions relative to each other to provide a commissural tab, the commissural tab being attached to the leaflets along a commissural tab line such that free ends of the tabs extend substantially radially outwardly from the line; and additionally comprising attaching side edges of the valve leaflets to each other along an attachment line which is coextensive with the commissural tab line.
Claim 47
Independent Claim
91 words
The method of manufacturing a stentless prosthetic valve comprising providing first and second valve leaflets each having an integral tab portion at an end thereof; and folding the tab portions relative to each other to provide a commissural tab, the commissural tab being attached to the leaflets along a commissural tab line such that free ends of the tabs extend substantially radially outwardly from the line; and additionally comprising attaching side edges of the valve leaflets to each other along an attachment line which is coextensive with the commissural tab line.
Claim 48
Dependent Claim
81 words
A stentless prosthetic comprising: a plurality of valve leaflets comprised of a flexible material, each leaflet having an inner surface and an outer surface, each leaflet sewn directly to another leaflet along an attachment line, a portion of an inner surface face of one leaflet being in facing relationship with a portion of an inner surface of another leaflet at the attachment line; and a commissural tab at an end of each attachment line, said tab configured for attachment to tissue.
Claim 49
Dependent Claim
81 words
A stentless prosthetic comprising: a plurality of valve leaflets comprised of a flexible material, each leaflet having an inner surface and an outer surface, each leaflet sewn directly to another leaflet along an attachment line, a portion of an inner surface face of one leaflet being in facing relationship with a portion of an inner surface of another leaflet at the attachment line; and a commissural tab at an end of each attachment line, said tab configured for attachment to tissue.
Claim 50
Dependent Claim
16 words
The valve of claim 42 , wherein the commissural tab is comprised of a flexible material.
Claim 51
Dependent Claim
16 words
The valve of claim 42 , wherein the commissural tab is integral with the valve leaflet.
Claim 52
Dependent Claim
14 words
The valve of claim 42 , wherein the leaflets are comprised of pericardial tissue.
Claim 53
Dependent Claim
14 words
The valve of claim 45 , wherein the leaflets are comprised of equine pericardium.
Claim 54
Dependent Claim
87 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line.
Claim 55
Dependent Claim
87 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line.
Claim 56
Dependent Claim
17 words
The valve of claim 47 , comprising a third leaflet joined to the first and second leaflets.
Claim 57
Dependent Claim
11 words
The valve of claim 47 , wherein said leaflets are scalloped.
Claim 58
Dependent Claim
17 words
The valve of claim 49 , wherein the scallops are on the outflow end of the valve.
Claim 59
Dependent Claim
17 words
The valve of claim 49 , wherein the scallops are on the inflow end of the valve.
Claim 60
Dependent Claim
16 words
The valve of claim 49 , wherein the scallops are on both ends of the valve.
Claim 61
Dependent Claim
17 words
The valve of claim 47 , wherein the leaflets are joined along the attachment line by stitches.
Claim 62
Dependent Claim
34 words
The valve of claim 47 , wherein said neck portions are disposed in a slot in said commissural tab, said slot retaining said neck portions in said juxtaposed relationship without attachment to each other.
Claim 63
Dependent Claim
19 words
The valve of claim 54 , wherein a distal end of the slot is rounded to avoid stress concentrations.
Claim 64
Dependent Claim
36 words
The valve of claim 54 , wherein said tab is stitched on opposite sides of said slot along respective lines that are spaced relative to said slot such that no stitches are in said neck portions.
Claim 65
Dependent Claim
29 words
A prosthetic valve, comprising: a valve body having an inlet portion comprising an annulus and an outlet portion, said annulus having a periphery comprised of edges which are scalloped.
Claim 66
Dependent Claim
29 words
A prosthetic valve, comprising: a valve body having an inlet portion comprising an annulus and an outlet portion, said annulus having a periphery comprised of edges which are scalloped.
Claim 67
Dependent Claim
17 words
The valve of claim 57 , wherein the outlet portion includes at least two commissural attachment locations.
Claim 68
Dependent Claim
15 words
The valve of claim 57 , wherein the edges of the outlet portion bare scalloped.
Claim 69
Dependent Claim
27 words
The valve of claim 57 , wherein said valve body comprises at least two leaflets joined to each other by seams extending longitudinally along the valve body.
Claim 70
Dependent Claim
26 words
The valve of claim 60 , wherein the seams retain an interior side of one leaflet in facing relationship with an interior side of another leaflet.
Claim 71
Dependent Claim
217 words
A stentless prosthetic heart valve, comprising: a plurality of thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, and side edges, the plurality of leaflets being sewn together along at least a portion of their side edges so as to form a substantially tubular valve structure having an in-flow end and an out-flow end, adjacent leaflets being arranged so that their side edges are substantially aligned and the inner faces of the leaflets engage each other adjacent the side edges, wherein the valve structure is movable between a closed position in which the out-flow edges of adjacent leaflets engage each other, and an open position in which the out-flow edges of adjacent leaflets are separated from each other except along the side edges, the sewn portions of the side edges of the leaflets biasing the leaflets toward a partially closed position, wherein the leaflets comprises a tab portion adjacent the leaflet out-flow edge, the tab portions are disposed adjacent at least one of the leaflet side edges, the tab portion is formed adjacent each leaflet side edge, the tab portions of adjacent leaflets are connected to each other to form commissural attachment tabs; wherein the connected tab portions are at least partially folded over each other.
Claim 72
Dependent Claim
217 words
A stentless prosthetic heart valve, comprising: a plurality of thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, and side edges, the plurality of leaflets being sewn together along at least a portion of their side edges so as to form a substantially tubular valve structure having an in-flow end and an out-flow end, adjacent leaflets being arranged so that their side edges are substantially aligned and the inner faces of the leaflets engage each other adjacent the side edges, wherein the valve structure is movable between a closed position in which the out-flow edges of adjacent leaflets engage each other, and an open position in which the out-flow edges of adjacent leaflets are separated from each other except along the side edges, the sewn portions of the side edges of the leaflets biasing the leaflets toward a partially closed position, wherein the leaflets comprises a tab portion adjacent the leaflet out-flow edge, the tab portions are disposed adjacent at least one of the leaflet side edges, the tab portion is formed adjacent each leaflet side edge, the tab portions of adjacent leaflets are connected to each other to form commissural attachment tabs; wherein the connected tab portions are at least partially folded over each other.
Claim 73
Dependent Claim
170 words
A stentless semilunar heart valve, comprising: three thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, side edges, and tab portions extending outwardly beyond the side edges and positioned adjacent the out-flow edge, the leaflets being attached to each other along their side edges so as to form a substantially tubular valve structure having an in-flow and an out-flow end; wherein the tab portions of adjacent leaflets engage each other to form commissural attachment tabs, at least a portion of each commissural attachment tab being adjacent the outer faces of the adjacent leaflets; wherein the in-flow edge and out-flow edge of each leaflet has a substantially scalloped shaped, a center portion of the in-flow edge of each leaflet extends a distance proximal of a position at which the side edge meets the in-flow edge; wherein a center portion of the out-flow edge of each leaflet extends a proximal of a position which the side edge meets the out-flow edge.
Claim 74
Dependent Claim
170 words
A stentless semilunar heart valve, comprising: three thin, flexible leaflets, each of the leaflets having an inner face, an outer face, an in-flow edge, an out-flow edge, side edges, and tab portions extending outwardly beyond the side edges and positioned adjacent the out-flow edge, the leaflets being attached to each other along their side edges so as to form a substantially tubular valve structure having an in-flow and an out-flow end; wherein the tab portions of adjacent leaflets engage each other to form commissural attachment tabs, at least a portion of each commissural attachment tab being adjacent the outer faces of the adjacent leaflets; wherein the in-flow edge and out-flow edge of each leaflet has a substantially scalloped shaped, a center portion of the in-flow edge of each leaflet extends a distance proximal of a position at which the side edge meets the in-flow edge; wherein a center portion of the out-flow edge of each leaflet extends a proximal of a position which the side edge meets the out-flow edge.
Claim 75
Dependent Claim
98 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein the leaflets are joined along the attachment line by stitches.
Claim 76
Dependent Claim
98 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein the leaflets are joined along the attachment line by stitches.
Claim 77
Dependent Claim
128 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein said neck portions are disposed in a slot in said commissural tab, said slot retaining said neck portions in said juxtaposed relationship without attachment to each other; wherein a distal end of the slot is rounded to avoid stress concentrations.
Claim 78
Dependent Claim
128 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein said neck portions are disposed in a slot in said commissural tab, said slot retaining said neck portions in said juxtaposed relationship without attachment to each other; wherein a distal end of the slot is rounded to avoid stress concentrations.
Claim 79
Dependent Claim
145 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein said neck portions are disposed in a slot in said commissural tab, said slot retaining said neck portions in said juxtaposed relationship without attachment to each other; wherein said tab is stitched on opposite sides of said slot along respective lines that are spaced relative to said slot such that no stitches are in said neck portions.
Claim 80
Dependent Claim
145 words
A prosthetic valve comprising: a valve body comprising at least first and second leaflets joined along a leaflet attachment line, said valve body comprising an inlet and an outlet, said leaflet attachment line extending from the inlet towards said outlet and terminating at a location short of the outlet, said valve body including a commissural tab comprised of neck portions juxtaposed along a neck line that extends from the attachment line termination to said outlet, said neck portions being at least substantially unattached along said neck line; wherein said neck portions are disposed in a slot in said commissural tab, said slot retaining said neck portions in said juxtaposed relationship without attachment to each other; wherein said tab is stitched on opposite sides of said slot along respective lines that are spaced relative to said slot such that no stitches are in said neck portions.
References Cited (Backward Citations)
US3608097A
Cited
US3671979A
Cited
US4106129A
Cited
US4056854A
Cited
US4297749A
Cited
GB1599407A
Cited
US4261342A
Cited
US4222126A
Cited
US4274437A
Cited
EP0051451A2
Cited
US4388735A
Cited
US4470157A
Cited
US4501030A
Cited
EP0103546B1
Cited
US4624822A
Cited
US4626255A
Cited
US4629459A
Cited
US4787901A
Cited
FR2591100A1
Cited
EP0276975A1
Cited
US4790844A
Cited
US4960424A
Cited
US5032128A
Cited
US5037434A
Cited
WO1991017720A1
Cited
US5411552A
Cited
WO1991019465A1
Cited
US5415667A
Cited
US5163955A
Cited
US5326370A
Cited
US5489298A
Cited
US5344442A
Cited
WO1992020303A1
Cited
US5500015A
Cited
US5713953A
Cited
EP0515324A1
Cited
US5370685A
Cited
US5332402A
Cited
US5824063A
Cited
US6092529A
Cited
US5480424A
Cited
US5713950A
Cited
US6350282B1
Cited
US6129758A
Cited
US5824065A
Cited
US5824067A
Cited
US5928281A
Cited
US5961549A
Cited
US6254636B1
Cited
WO2000042950A2
Cited
US6338740B1
Cited
WO2001076510A2
Cited
US6454799B1
Cited
WO2002024118A1
Cited
US6461382B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-01-26 | 2007-07-28 | 2008-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-26 | 2011-07-28 | 2012-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-26 | 2015-07-28 | 2016-01-27 | $7700.00 | Window Closed / Lapsed |