US4719916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraintestinal bypass tube
Assignee: DR BIAGIO RAVO
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Filing: 1986-09-19
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Granted: 1988-01-19
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Expires: 2006-09-19
Abstract
Abstract The intestinal graft is a graft formed of a thin wall latex or silastic tube of various widths and lengths. The upper circular end of the tube and vertical seam are reinforced by fabric which contains a radiopaque filament. When the graft is joined to the submucosal layer of the bowel proximal to the usual anastomosis, it will prevent salivary esophago-gastrointestinal secretions, food, and fecal flow from coming in contact with the anastomotic closure site. The graft will thus prevent leakage from any intestinal anastomosis and will guarantee a healed anastomosis by the time the graft is naturally expelled from rectum.
Inventors
- 👤 Biagio Ravo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:03
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B17/1114; A61B90/00; A61B90/39
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
110 words
A bypass graft suitable for attachment in the lumen of a resectioned intestine or duct upstream of the anastomosis thereof, the bypass graft consisting essentially of (1) a tube having opposite ends and formed along its entire length of a thin, water-impervious wall material having sufficient flexibility to conform to the natural movements of said intestine or duct surrounding it, and (2) freely collapsible reinforcing means extending circumferentially around at least one of said ends rendering said at least one end stronger than said thin wall material but still sufficiently flexible to conform to said natural movements, with said graft being freely collapsible and freely bendable throughout its entire length.
Claim 2
Dependent Claim
110 words
A bypass graft suitable for attachment in the lumen of a resectioned intestine or duct upstream of the anastomosis thereof, the bypass graft consisting essentially of (1) a tube having opposite ends and formed along its entire length of a thin, water-impervious wall material having sufficient flexibility to conform to the natural movements of said intestine or duct surrounding it, and (2) freely collapsible reinforcing means extending circumferentially around at least one of said ends rendering said at least one end stronger than said thin wall material but still sufficiently flexible to conform to said natural movements, with said graft being freely collapsible and freely bendable throughout its entire length.
Claim 3
Dependent Claim
10 words
Apparatus according to claim 1 wherein said tube comprises latex.
Claim 4
Dependent Claim
18 words
Apparatus according to claim 1 wherein said material has thickness in the range of 0.005 to 0.050 mm.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 wherein said material has thickness of approximately 0.01 mm.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 1 wherein said reinforcing means comprises a cylindrical collar made of a woven fabric.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 1 wherein said reinforcing means comprises a cylindrical collar formed as a thickened end portion of said tube.
Claim 8
Dependent Claim
23 words
A bypass graft of claim 1 further comprising a radiopaque means extending along the length of said tube and defining a line thereon.
Claim 9
Dependent Claim
147 words
A bypass graft suitable for attachment in the lumen of a re-sectioned intestine of a mammal upstream of the anastomosis of said intestine in order to protect said anastomosis and capable of being naturally expelled in an intact condition from the mammal's intestine through the mammal's anus without significant risk of injury, said bypass graft consisting essentially of (1) a non-perforated cylindrical tube having opposite ends and formed along its entire length of a thin water-impervious wall material having sufficient flexibility to conform to the natural movements of the intestine surrounding it, and (2) freely collapsible reinforcing means extending circumferentially around at least one of said ends of said cylindrical tube for rendering said at least one end stronger than said thin wall material but still sufficiently flexible to conform to said natural movements, with said graft being freely collapsible and freely bendable throughout its entire length.
Claim 10
Dependent Claim
147 words
A bypass graft suitable for attachment in the lumen of a re-sectioned intestine of a mammal upstream of the anastomosis of said intestine in order to protect said anastomosis and capable of being naturally expelled in an intact condition from the mammal's intestine through the mammal's anus without significant risk of injury, said bypass graft consisting essentially of (1) a non-perforated cylindrical tube having opposite ends and formed along its entire length of a thin water-impervious wall material having sufficient flexibility to conform to the natural movements of the intestine surrounding it, and (2) freely collapsible reinforcing means extending circumferentially around at least one of said ends of said cylindrical tube for rendering said at least one end stronger than said thin wall material but still sufficiently flexible to conform to said natural movements, with said graft being freely collapsible and freely bendable throughout its entire length.
Claim 11
Dependent Claim
15 words
A bypass graft according to claim 8 wherein said reinforcing means comprises a reinforcing collar.
Claim 12
Dependent Claim
19 words
A bypass graft according to claim 9 wherein said reinforcing collar comprises a cloth material sewn to said tube.
Claim 13
Dependent Claim
30 words
A bypass graft according to claim 9 wherein said reinforcing collar comprises a plurality of layers or folds of the wall material of said cylindrical tube of said bypass graft.
Claim 14
Dependent Claim
24 words
A bypass graft according to claim 8 wherein said reinforcing means comprises a reinforcing collar of cloth sewn to each end of said tube.
Claim 15
Dependent Claim
18 words
A bypass graft according to claim 8 wherein said tube is seamless along its length between its ends.
Claim 16
Dependent Claim
12 words
A bypass graft according to claim 7 wherein said tube comprises latex.
Claim 17
Dependent Claim
12 words
A bypass graft according to claim 7 wherein said tube comprises silastic.
Claim 18
Dependent Claim
21 words
A bypass graft according to claim 7 wherein said wall material has thickness in the range of 0.005 to 0.050 mm.
Claim 19
Dependent Claim
17 words
A bypass graft according to claim 7 wherein said wall material has thickness of approximately 0.01 mm.
Claim 20
Dependent Claim
19 words
A bypass graft according to claim 7 wherein said reinforcing means comprises a cylindrical collar made of a fabric.
Claim 21
Dependent Claim
24 words
A bypass graft according to claim 7 wherein said reinforcing means comprises a cylindrical collar formed as a thickened end portion of said tube.
Claim 22
Dependent Claim
23 words
A bypass graft of claim 8 further comprising a radiopaque means extending along the length of said tube and defining a line thereon.
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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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |