US5895420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bioresorbable heart valve support
Assignee: St Jude Medical LLC
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Filing: 1997-09-15
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Granted: 1999-04-20
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Expires: 2017-09-15
Abstract
Abstract This invention relates to bioprosthetic heart valve stents that are fashioned of bioresorbable materials. Such stents may be configured as sheaths or frames contoured to the shape of a valvular graft. The stents are eventually resorbed by the patent, leaving a functional "stentless" valve with improved hemodynamic characteristics compared to stented valve implants.
Inventors
- 👤 II M. William Mirsch
- 👤 Katherine S. Tweden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; A61F2/2412; A61L; A61L27/00; A61L27/50; A61L27/507; A61L31/00; A61L31/14; A61L31/148; A61F2/2418; A61F2210/00; A61F2210/0004; A61F2250/00; A61F2250/0014; A61F2250/003; A61F2250/0031; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
53 words
A bioprosthetic heart valve comprising a valvular tissue graft secured to a biocompatible, resorbable heart valve stent, said stent having an open, interconnected porosity, said bioprosthetic heart valve being appropriate for joining with cardiac tissue, wherein said stent is operably resorbed following substantially complete healing of said heart valve with said cardiac tissue.
Claim 2
Dependent Claim
53 words
A bioprosthetic heart valve comprising a valvular tissue graft secured to a biocompatible, resorbable heart valve stent, said stent having an open, interconnected porosity, said bioprosthetic heart valve being appropriate for joining with cardiac tissue, wherein said stent is operably resorbed following substantially complete healing of said heart valve with said cardiac tissue.
Claim 3
Dependent Claim
15 words
The bioprosthetic heart valve of claim 1, wherein said stent comprises a biocompatible, resorbable polymer.
Claim 4
Dependent Claim
37 words
The bioprosthetic heart valve of claim 1, wherein said polymer is selected from the group consisting of dextran, hydroxyethyl starch, gelatin, derivatives of gelatin, polyvinylpyrrolidone, polyvinyl alcohol, poly N-(2-hydroxypropyl)methacrylamide!, polyglycols, polyesters, poly (orthoesters), poly (ester-amides) and polyanhydrides.
Claim 5
Dependent Claim
34 words
The bioprosthetic heart valve of claim 3, wherein said polyesters are selected form the group consisting of poly (hydroxy acids) and copolymers thereof, poly ( epsilon!-caprolactone), poly (dimethyl glycolic acid) and poly (hydroxy butyrate).
Claim 6
Dependent Claim
33 words
The bioprosthetic heart valve of claim 2, wherein said polymer is selected from the group consisting of D,L-polylactic acid, L-polylactic acid, glycolic acid and copolymers of D,L-polylactic acid, L-polylactic acid, and glycolic acid.
Claim 7
Dependent Claim
22 words
The bioprosthetic heart valve of claim 1, wherein said stent comprises a frame contoured to the shape of said valvular tissue graft.
Claim 8
Dependent Claim
22 words
The bioprosthetic heart valve of claim 1, wherein said stent comprises a sheath contoured to the shape of said valvular tissue graft.
Claim 9
Dependent Claim
26 words
The bioprosthetic heart valve of claim 1, wherein said stent having nonuniform rigidity is selected such that the native compliance of adjacent host structures is maintained.
Claim 10
Dependent Claim
63 words
A bioprosthetic heart valve comprising a valvular tissue graft secured to a biocompatible, resorbable heart valve stent, said stent having nonuniform rigidity selected such that the native compliance of adjacent host structures is maintained, said bioprosthetic heart valve being appropriate for joining with cardiac tissue, wherein said stent is operably resorbed following substantially complete healing of said heart valve with said cardiac tissue.
Claim 11
Dependent Claim
63 words
A bioprosthetic heart valve comprising a valvular tissue graft secured to a biocompatible, resorbable heart valve stent, said stent having nonuniform rigidity selected such that the native compliance of adjacent host structures is maintained, said bioprosthetic heart valve being appropriate for joining with cardiac tissue, wherein said stent is operably resorbed following substantially complete healing of said heart valve with said cardiac tissue.
Claim 12
Dependent Claim
15 words
The bioprosthetic heart valve of claim 9, wherein said stent comprises a biocompatible, resorbable polymer.
Claim 13
Dependent Claim
37 words
The bioprosthetic heart valve of claim 9, wherein said polymer is selected from the group consisting of dextran, hydroxyethyl starch, gelatin, derivatives of gelatin, polyvinylpyrrolidone, polyvinyl alcohol, poly N-(2-hydroxypropyl)methacrylamide!, polyglycols, polyesters, poly (orthoesters), poly (ester-amides) and polyanhydrides.
Claim 14
Dependent Claim
34 words
The bioprosthetic heart valve of claim 11, wherein said polyesters are selected form the group consisting of poly (hydroxy acids) and copolymers thereof, poly ( epsilon!-caprolactone), poly (dimethyl glycolic acid) and poly (hydroxy butyrate).
Claim 15
Dependent Claim
33 words
The bioprosthetic heart valve of claim 10, wherein said polymer is selected from the group consisting of D,L-polylactic acid, L-polylactic acid, glycolic acid and copolymers of D,L-polylactic acid, L-polylactic acid, and glycolic acid.
Claim 16
Dependent Claim
22 words
The bioprosthetic heart valve of claim 9, wherein said stent comprises a frame contoured to the shape of said valvular tissue graft.
Claim 17
Dependent Claim
21 words
The bioprosthetic heart valve of claim 9, wherein said stent comprises a sheath contoured to the shape of said valvular tissue.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |