US5755782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stents for autologous tissue heart valve
Assignee: PFG AUTOGENICS INVESTMENTS LLC
•
Filing: 1993-12-17
•
Granted: 1998-05-26
•
Expires: 2013-12-17
Abstract
Abstract An improved set of stents for autologous tissue heart valves is provided. The stents are designed with the aid of a computer-aided-design (CAD) system, and nest within each other to securely clamp a piece of tissue which forms the leaflets of the heart valve. The geometrical features of the stents are designed to provide uniform nesting between the stents to prevent the formation of stress raisers on the tissue. Additionally, the windows in the stent posts are narrowed to prevent the suturing needle used during implantation of the valve from becoming lodged in the garter springs which clamp the outer stent to the inner stent. Finally, the sock covering the outer stent is bonded to the stent base at both upper and lower locations to isolate the bonds from the patient's blood flow.\!
Inventors
- 👤 Charles S. Love
- 👤 Jack W. Love
- 👤 John H. Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:57
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; A61F2/2409; A61F2/2472; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed around said base; a plurality of posts extending upwardly from said base, said posts adapted to register with said inner stent when said inner and outer stents are secured together, at least one of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
Claim 2
Dependent Claim
164 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed around said base; a plurality of posts extending upwardly from said base, said posts adapted to register with said inner stent when said inner and outer stents are secured together, at least one of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
Claim 3
Dependent Claim
17 words
The outer stent of claim 1 further comprising a plurality of scalloped portions disposed between said posts.
Claim 4
Dependent Claim
18 words
The outer stent of claim 2 wherein each of said scalloped portions contains a cusp at its midsection.
Claim 5
Dependent Claim
34 words
The outer stent of claim 1 wherein said posts and said base are shaped so as to prevent said tissue from being pinched when said inner stent has been inserted into said outer stent.
Claim 6
Dependent Claim
168 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed around said base; a plurality of posts extending upwardly from said base, said posts connected by scalloped portions, said posts adapted to register with said inner stent when said inner and outer stents are secured together, each of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
Claim 7
Dependent Claim
168 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed around said base; a plurality of posts extending upwardly from said base, said posts connected by scalloped portions, said posts adapted to register with said inner stent when said inner and outer stents are secured together, each of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
Claim 8
Dependent Claim
208 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a frame having an annular lower portion and an upper portion, said lower portion having a plurality of slots, said upper portion integrally formed with and extending upwardly from said lower portion to form a plurality of posts, at least one of said posts having a window to allow the insertion of the posts of said inner stent therein; a tensioning spring disposed in a circumferential groove formed in an outer surface of said lower portion, said spring causing said lower portion of said frame to clamp said tissue between said inner and outer stents when formed as said heart valve; an elastic ring disposed around said lower portion for allowing the securing of said outer stent to said patient; and a covering emplaced around said frame and said ring and bonded to said lower portion of said frame at a plurality of locations.
Claim 9
Dependent Claim
208 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a frame having an annular lower portion and an upper portion, said lower portion having a plurality of slots, said upper portion integrally formed with and extending upwardly from said lower portion to form a plurality of posts, at least one of said posts having a window to allow the insertion of the posts of said inner stent therein; a tensioning spring disposed in a circumferential groove formed in an outer surface of said lower portion, said spring causing said lower portion of said frame to clamp said tissue between said inner and outer stents when formed as said heart valve; an elastic ring disposed around said lower portion for allowing the securing of said outer stent to said patient; and a covering emplaced around said frame and said ring and bonded to said lower portion of said frame at a plurality of locations.
Claim 10
Dependent Claim
195 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed in a groove formed around said base for providing a radially compressive force about said base and configured to clamp said tissue between said inner and outer stents when formed as said heart valve; a plurality of posts extending upwardly from said base, said posts adapted to register with said inner stent when said inner and outer stents are secured together, at least one of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
Claim 11
Dependent Claim
195 words
An outer stent for securing an inner stent having a base and a plurality of posts extending therefrom and spaced around the base and tissue wrapped thereon, said outer stent spreadable from a relaxed position to a spread position, said outer and inner stents cooperating to form a heart valve implanted into a patient by use of sutures and needles, said outer stent comprising: a base having a plurality of slots; a tensioning spring disposed in a groove formed around said base for providing a radially compressive force about said base and configured to clamp said tissue between said inner and outer stents when formed as said heart valve; a plurality of posts extending upwardly from said base, said posts adapted to register with said inner stent when said inner and outer stents are secured together, at least one of said posts including a window to allow the insertion of the posts of said inner stent therein; an elastic ring disposed around said base for allowing the securing of said outer stent to said patient; and a covering emplaced around said base and said posts and bonded to said base at a plurality of locations.
References Cited (Backward Citations)
US1266423A
Cited
FR766025A
Cited
US2708950A
Cited
US2822819A
Cited
US3022802A
Cited
GB1189399A
Cited
GB1264471A
Cited
US3548418A
Cited
US3570014A
Cited
US3532016A
Cited
GB1264472A
Cited
US3714671A
Cited
US3755823A
Cited
US3824140A
Cited
US4192020A
Cited
US4035849A
Cited
FR2337543A1
Cited
US4106129A
Cited
US4084268A
Cited
US4297749A
Cited
US4172295A
Cited
US4247292A
Cited
US4441216A
Cited
US4388735A
Cited
US4478661A
Cited
US4470157A
Cited
US4501030A
Cited
US4427470A
Cited
US4490859A
Cited
US4597767A
Cited
SU1116573A1
Cited
US4605407A
Cited
US4512471A
Cited
US4687483A
Cited
EP0179562B1
Cited
US4725274A
Cited
US4851000A
Cited
US4838288A
Cited
US5036312A
Cited
US5060716A
Cited
US5037434A
Cited
WO1991015167A1
Cited
US5147391A
Cited
US5197979A
Cited
US5163955A
Cited
US5326371A
Cited
US5326370A
Cited
US5423887A
Cited
US5488789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |