US4364126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart valve with removable cusp protector band
Assignee: Medtronic Inc
•
Filing: 1981-07-28
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Granted: 1982-12-21
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Expires: 2001-07-28
Abstract
Abstract A plastic band is secured around the outside of a prosthetic heart valve adjacent the sewing cushion to protect the valve leaflet material against inadvertent needle punctures and tears while sutures are being placed through the sewing cushion. The band is held in place by a single retention suture which passes through the band and sewing cushion of the valve and extends across the valve orifice. The protector is especially desirable for use with pericardial tissue valves having the tissue mounted on the outside of the valve stent where the tissue is particularly exposed and susceptible to needle damage.
Inventors
- 👤 Jonathan J. Rosen
- 👤 George M. Acosta
- 👤 Christopher J. Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; A61F2/0095; A61F2250/00; A61F2250/0058; A61F2250/0059; Y; Y10; Y10S; Y10S623/00; Y10S623/90
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
58 words
In a prosthetic heart valve comprising a cylindrical stent, sheet material overlying the stent and extending inwardly to form a closure within the confines of said stent, and a sewing cushion encircling the stent at one end thereof, the improvement comprising a removable protective band circumscribing the stent and overlying the sheet material immediately adjacent said sewing cushion.
Claim 2
Dependent Claim
58 words
In a prosthetic heart valve comprising a cylindrical stent, sheet material overlying the stent and extending inwardly to form a closure within the confines of said stent, and a sewing cushion encircling the stent at one end thereof, the improvement comprising a removable protective band circumscribing the stent and overlying the sheet material immediately adjacent said sewing cushion.
Claim 3
Dependent Claim
35 words
The valve of claim 1 wherein said protective band is secured to said valve by means of a single retention suture passing through the band and sewing cushion and traversing the orifice of the valve.
Claim 4
Dependent Claim
14 words
The valve of claim 1 wherein the band is fabricated of a polymeric material.
Claim 5
Dependent Claim
13 words
The valve of claim 3 wherein said protective band is molded of polypropylene.
Claim 6
Dependent Claim
21 words
The valve of claim 2 wherein said protective band includes depressions at locations where the suture is passed through the band.
Claim 7
Dependent Claim
20 words
The valve of claim 2 wherein said band includes openings at locations where the suture is passed through the band.
Claim 8
Dependent Claim
25 words
The valve of claim 2 wherein the protective band comprises an elongated strip formed into a cylinder with the ends secured by said retention suture.
Claim 9
Dependent Claim
16 words
The valve of claim 1 wherein said protective band is at least about 0.25 inches wide.
Claim 10
Dependent Claim
14 words
The valve of claim 1 wherein said sheet material is a natural tissue material.
Claim 11
Dependent Claim
23 words
The valve of claim 8 wherein said natural tissue material is selected from the group consisting of pericardium, fascia lata and dura matter.
Claim 12
Dependent Claim
11 words
The valve of claim 1 wherein said sheet material is polyurethane.
Claim 13
Dependent Claim
64 words
A protective band adapted to circumscribe a prosthetic heart valve constructed of natural or synthetic sheet material and comprising a flat, elongated strip having a length corresponding to the circumference of said valve a width of at least about 0.25 inches, said band having a plurality of suture guide means at each end thereof and at least one suture guide means intermediate said ends.
Claim 14
Dependent Claim
64 words
A protective band adapted to circumscribe a prosthetic heart valve constructed of natural or synthetic sheet material and comprising a flat, elongated strip having a length corresponding to the circumference of said valve a width of at least about 0.25 inches, said band having a plurality of suture guide means at each end thereof and at least one suture guide means intermediate said ends.
Claim 15
Dependent Claim
16 words
A protective band of claim 12 wherein said strip is fabricated of a nontoxic polymeric material.
Claim 16
Dependent Claim
14 words
The protective band of claim 13 wherein said protective band is molded of polypropylene.
Claim 17
Dependent Claim
16 words
The protective band of claim 12 wherein said suture guide means comprise openings through said strip.
Claim 18
Dependent Claim
19 words
The protective band of claim 12 wherein said suture guide means comprise depressions in one surface of said strip.
Claim 19
Dependent Claim
31 words
The protective band of claim 16 wherein the thickness of said strip is about 0.02 inches, and the thickness at the base of said depressions is less than about 0.01 inches.
Claim 20
Dependent Claim
53 words
The protective strip of claim 12 wherein said strip includes a double row of suture guide means centrally disposed about the major axis of said strip at each end thereof and a pair of elongated suture guide means aligned with one of said rows and equidistantly spaced between the ends of said strip.
References Cited (Backward Citations)
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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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |