US3835863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T tube
Assignee: Uresil Corp
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Filing: 1973-05-15
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Granted: 1974-09-17
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Expires: 1993-05-15
Abstract
Abstract A flexible surgical T tube with a continuous open slit extending across the top of the cross tube is disclosed. This improved T tube allows the tube to be removed from a duct after surgical implantation by simple non-surgical withdrawal while minimizing wound stress and trauma in the duct.
Inventors
- 👤 E Goldberg
- 👤 S Bazell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:29
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61M; A61M27/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
In a flexible surgical T tube for surgical insertion into an internal duct of a patient such as the hepatic duct having a flexible base tube and a flexible cross tube interconnected thereto to provide a T tube having communicating openings on all ends of the T, the improvement which comprises a continuous open slit across the top of the cross tube extending from one end of the cross tube to the other end of the cross tube and an outwardly facing U-shaped notch positioned above the top opening of the base tube and in the side walls of the cross tube, said slit further characterized in that the portions of the slit in the cross tube on either side of the notch are partially misaligned wherein the edge of one slit portion telescopes between the edges of the slit of the other slit portion when the cross tube is folded together on withdrawal thereby facilitating the removal of the tube from the duct by minimizing wound stress and trauma.
Claim 2
Dependent Claim
170 words
In a flexible surgical T tube for surgical insertion into an internal duct of a patient such as the hepatic duct having a flexible base tube and a flexible cross tube interconnected thereto to provide a T tube having communicating openings on all ends of the T, the improvement which comprises a continuous open slit across the top of the cross tube extending from one end of the cross tube to the other end of the cross tube and an outwardly facing U-shaped notch positioned above the top opening of the base tube and in the side walls of the cross tube, said slit further characterized in that the portions of the slit in the cross tube on either side of the notch are partially misaligned wherein the edge of one slit portion telescopes between the edges of the slit of the other slit portion when the cross tube is folded together on withdrawal thereby facilitating the removal of the tube from the duct by minimizing wound stress and trauma.
Claim 3
Dependent Claim
18 words
An improved T tube according to claim 1 wherein said tube is an integrally formed silicone rubber tube.
Claim 4
Dependent Claim
17 words
An inproved T tube according to claim 1 wherein each end of the cross tube is rounded.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |