US3648295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide for growing blood vessels or the like
Assignee: Individual
•
Filing: 1970-10-12
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Granted: 1972-03-14
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Expires: 1990-10-12
Abstract
Abstract A device for guiding growth of blood vessels or the like for use in the surgical repair of impaired blood vessels or like tissues. A flexible inner perforated tube having an outside diameter approximately equal to the inside diameter of the severed blood vessel is located inside an outer imperforate flexible tube having an inside diameter approximately equal to the outside diameter of the severed blood vessel. The severed ends of the blood vessel are positioned between the inner and outer tube ends in spaced relationship, whereby blood can flow through the perforated tube to the space between the inner and outer tubes to promote growth and subsequent joining of the several blood vessel ends.
Inventors
- 👤 James R Palma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:35
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/062
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
A device for guiding and promoting growth of a severed blood vessel in a living body, said device comprising a first thinwalled and flexible imperforate tube having an inside diameter about the same as the outside diameter of the blood vessel and having end portions adapted to fit closely over the outside of the blood vessel, a second thin-walled and flexible tube having an outside diameter about the same as the inside diameter of the blood vessel and having end portions adapted to fit closely inside the blood vessel, said second tube being located inside said first tube in use and separated therefrom by a space equal to or slightly larger than the thickness of the blood vessel, said first and second tubes being made from a material suitable for contact with a blood vessel, and said second tube having aperture means therein for supplying blood from the severed blood vessel to the space between said tubes to promote growth of the ends of the severed blood vessel through said space until said ends join.
Claim 2
Independent Claim
175 words
A device for guiding and promoting growth of a severed blood vessel in a living body, said device comprising a first thinwalled and flexible imperforate tube having an inside diameter about the same as the outside diameter of the blood vessel and having end portions adapted to fit closely over the outside of the blood vessel, a second thin-walled and flexible tube having an outside diameter about the same as the inside diameter of the blood vessel and having end portions adapted to fit closely inside the blood vessel, said second tube being located inside said first tube in use and separated therefrom by a space equal to or slightly larger than the thickness of the blood vessel, said first and second tubes being made from a material suitable for contact with a blood vessel, and said second tube having aperture means therein for supplying blood from the severed blood vessel to the space between said tubes to promote growth of the ends of the severed blood vessel through said space until said ends join.
Claim 3
Dependent Claim
37 words
The guide device as claimed in claim 1 in which said end portions of said first tube taper down from a central portion of said tube to a substantially thinner dimension at the tips of said tube.
Claim 4
Dependent Claim
19 words
The guide device as claimed in claim 1 in which said first and second tubes are made of plastic.
Claim 5
Dependent Claim
14 words
The guide device as claimed in claim 3 in which said plastic comprises nylon.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |