Patent US2845617A successfully refreshed from Google Patents.
US6019791A
Expired / Lapsed
US
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Buttress for cardiac valve reconstruction
Assignee: Individual
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Filing: 1996-07-17
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Granted: 2000-02-01
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Expires: 2016-07-17
Abstract
Abstract A buttress for cardiac valve reconstruction comprises an elongate member formed from two superimposed layers of a fabric. The layers are fastened together by longitudinally extending seams having inwardly extending opposing selvedges. The elongate member fits part-annularly against the base of the cusps of the cardiac valve. The fabric is longitudinally extendable to 105-150% of its non-extended length. An apparatus for cardiac valve reconstruction comprises a holder, including a buttress receiving area; and a buttress comprising a part-annularly shaped elongate member formed from a fabric. The buttress is removably mounted onto the buttress receiving area of the holder in an extended condition, the extended condition being 105-150% of the non-extended length of the elongate member. The buttress and apparatus can be used in the reconstruction of mitral and tricuspid cardiac valves.
Inventors
- 👤 Alfred E. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2442; A61F2/2445; A61F2/2466
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
63 words
A buttress for reconstructing a cardiac valve having cusps, the buttress comprising: two superimposed layers of a fabric forming an elongate member, the fabric partially-annularly fitting against a base of the cusps, the fabric being longitudinally extendable to 105-150% of a non-extended length of the elongate member; and, longitudinally extending seams for fastening the layers together, said seams having inwardly extending opposing selvedges.
Claim 2
Dependent Claim
63 words
A buttress for reconstructing a cardiac valve having cusps, the buttress comprising: two superimposed layers of a fabric forming an elongate member, the fabric partially-annularly fitting against a base of the cusps, the fabric being longitudinally extendable to 105-150% of a non-extended length of the elongate member; and, longitudinally extending seams for fastening the layers together, said seams having inwardly extending opposing selvedges.
Claim 3
Dependent Claim
34 words
A buttress according to claim 1, wherein free ends of the elongate member define an arcuate spacing therebetween, the arcuate spacing being more than one quarter of the non-extended length of the elongate member.
Claim 4
Dependent Claim
74 words
A buttress according to claim 1, wherein the buttress is adapted for reconstructing a mitral valve, the mitral valve having an anterior leaflet and a posterior leaflet, the leaflets meeting at a commissure; and, the buttress fitting against at least a base of the posterior mitral leaflet, the non-extended length approximating four times a maximum depth of the anterior leaflet from the base of the anterior leaflet to the commissure with the posterior leaflet.
Claim 5
Dependent Claim
33 words
A buttress according to claim 1, wherein the buttress is adapted for reconstructing a tricuspid valve; and, the buttress fitting against at least a base of an anterior leaflet of the tricuspid valve.
Claim 6
Dependent Claim
15 words
A buttress according to claim 1, wherein the fabric is extendable both longitudinally and transversely.
Claim 7
Dependent Claim
45 words
A buttress according to claim 5, wherein the fabric further comprises longitudinally extending ribs disposed on one side of the fabric and transversely extending ribs disposed on a reverse side of the fabric, whereby the ribs allow the fabric to be longitudinally and transversely extendable.
Claim 8
Dependent Claim
16 words
A buttress according to claim 1, wherein the fabric is woven or knitted from polymerized tetrafluoroethylene.
Claim 9
Dependent Claim
34 words
A buttress according to claim 1, wherein to form the two superimposed layers, the elongate member comprises a length of the fabric folded at each end of the elongate member in a reflex manner.
Claim 10
Dependent Claim
16 words
A buttress according to claim 1, wherein the elongate member comprises two superimposed lengths of fabric.
Claim 11
Dependent Claim
23 words
A buttress according to claim 1, wherein the buttress is impregnated with a radiopaque material comprising an inert, water insoluble, heavy metal compound.
Claim 12
Dependent Claim
22 words
A buttress according to claim 10, wherein the heavy metal compound is selected from the group comprising barium sulphate and titanium dioxide.
Claim 13
Dependent Claim
25 words
A buttress according to claim 1, further comprising a radiopaque filament within the buttress, the radiopaque filament including an inert, water insoluble heavy metal compound.
Claim 14
Dependent Claim
22 words
A buttress according to claim 12, wherein the heavy metal compound is selected from the group comprising barium sulphate and titanium dioxide.
Claim 15
Dependent Claim
18 words
A buttress according to claim 1, wherein the fabric is longitudinally extendable to 105-125% of the non-extended length.
Claim 16
Dependent Claim
18 words
A buttress according to claim 1, wherein the fabric is longitudinally extendable to 105-108% of the non-extended length.
Claim 17
Independent Claim
67 words
An apparatus for cardiac valve reconstruction, the apparatus comprising: a holder including a buttress receiving area having a partially-annular configuration; a buttress comprising an elongate member and being of a fabric, the fabric being longitudinally extendable to an extended condition being 105-150% of a non-extended length of the elongate member; and, mounting means for removably mounting the buttress on the buttress receiving area in the extended condition.
Claim 18
Independent Claim
67 words
An apparatus for cardiac valve reconstruction, the apparatus comprising: a holder including a buttress receiving area having a partially-annular configuration; a buttress comprising an elongate member and being of a fabric, the fabric being longitudinally extendable to an extended condition being 105-150% of a non-extended length of the elongate member; and, mounting means for removably mounting the buttress on the buttress receiving area in the extended condition.
Claim 19
Dependent Claim
35 words
An apparatus according to claim 16, wherein respective free ends of the elongate member define an arcuate spacing therebetween, the arcuate spacing being more than one quarter of the non-extended length of the elongate member.
Claim 20
Dependent Claim
16 words
An apparatus according to claim 16, further comprising an arcuate rim providing the buttress receiving area.
Claim 21
Dependent Claim
19 words
An apparatus according to claim 18, wherein the rim includes a groove, the groove defining the buttress receiving area.
Claim 22
Dependent Claim
27 words
An apparatus according to claim 18, further comprising a scalloped flange extending from the rim and defining a buttress receiving area between the flange and the rim.
Claim 23
Dependent Claim
18 words
An apparatus according to claim 18, wherein the rim is supported by a plurality of radially extending spokes.
Claim 24
Dependent Claim
53 words
An apparatus according to claim 18, wherein the mounting means is a length of suture thread, the suture thread being removably connected to respective free ends of the buttress, and free ends of the length of the suture thread being secured, under tension, so as to stretch the buttress into the extended condition.
Claim 25
Dependent Claim
48 words
An apparatus according to claim 22, wherein the rim includes an aperture intermediate free ends of the buttress receiving area, both free ends of the suture thread extending through the aperture and being secured together, under such tension so as to stretch the buttress to the extended condition.
Claim 26
Dependent Claim
18 words
A buttress according to claim 16, wherein the fabric is longitudinally extended to 105-125% of the non-extended length.
Claim 27
Dependent Claim
18 words
A buttress according to claim 16, wherein the fabric is longitudinally extended to 105-108% of the non-extended length.
Claim 28
Independent Claim
80 words
A method for cardiac valve reconstruction, the cardiac valve having cusps, comprising the steps of: reversibly mounting a buttress onto a holder to form an apparatus for cardiac valve reconstruction, the buttress comprising an elongate member of a fabric, the fabric being longitudinally extended to 105-150% of a non-extended length of the elongate member; fixing the buttress to a base of the cusps; and detaching the buttress from the holder thereby allowing the buttress to contract towards the non-extended length.
Claim 29
Independent Claim
80 words
A method for cardiac valve reconstruction, the cardiac valve having cusps, comprising the steps of: reversibly mounting a buttress onto a holder to form an apparatus for cardiac valve reconstruction, the buttress comprising an elongate member of a fabric, the fabric being longitudinally extended to 105-150% of a non-extended length of the elongate member; fixing the buttress to a base of the cusps; and detaching the buttress from the holder thereby allowing the buttress to contract towards the non-extended length.
Claim 30
Dependent Claim
18 words
A buttress according to claim 26, wherein the fabric is longitudinally extended to 105-125% of the non-extended length.
Claim 31
Dependent Claim
18 words
A buttress according to claim 26, wherein the fabric is longitudinally extended to 105-108% of the non-extended length.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-31 | 2003-08-02 | 2004-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-31 | 2007-08-02 | 2008-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-31 | 2011-08-02 | 2012-02-01 | $7700.00 | Window Closed / Lapsed |