US4204525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for supplying venous pressure in a portal vein
Assignee: Individual
•
Filing: 1978-07-14
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Granted: 1980-05-27
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Expires: 1998-07-14
Abstract
Abstract A method and device for pressurizing the flow of venous blood in the portal vein to a diseased liver. The method comprises introducing arterial blood into the flow path of the venous blood in the portal vein. The device comprises an elongate chamber, the ends of which are adapted to be connected to the ends of the portal vein from which a section has been removed to provide a substitute flow path for the removed section, interiorly thereof a nozzle facing in the direction of flow and a conductor, one end of which is connected to the nozzle and the other end of which is connected to an arterial vein.
Inventors
- 👤 Edward A. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/064
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
The method of supplying venous blood to the liver at a pressure in excess of the back pressure tending to prevent delivery thereof by the portal vein thereto comprising introducing arterial blood to the flow path of the venous blood in the portal vein adjacent to the liver.
Claim 2
Independent Claim
48 words
The method of supplying venous blood to the liver at a pressure in excess of the back pressure tending to prevent delivery thereof by the portal vein thereto comprising introducing arterial blood to the flow path of the venous blood in the portal vein adjacent to the liver.
Claim 3
Independent Claim
63 words
The method of supplying venous blood to the liver comprising introducing arterial blood from an arterial vein close to the portal vein by connecting an arterial vein to the portal vein adjacent the liver and providing means for directing the flow of blood from the arterial vein into the stream of the venous blood in the direction of normal flow of the latter.
Claim 4
Independent Claim
63 words
The method of supplying venous blood to the liver comprising introducing arterial blood from an arterial vein close to the portal vein by connecting an arterial vein to the portal vein adjacent the liver and providing means for directing the flow of blood from the arterial vein into the stream of the venous blood in the direction of normal flow of the latter.
Claim 5
Independent Claim
64 words
The method of supplying venous blood to the liver comprising interposing a connector into the portal vein defining a flow chamber in line with the flow path of the venous blood and injecting arterial blood from an adjacent arterial vein into said chamber at the center line of flow of the venous blood therethrough and in the direction of flow of the venous blood.
Claim 6
Independent Claim
64 words
The method of supplying venous blood to the liver comprising interposing a connector into the portal vein defining a flow chamber in line with the flow path of the venous blood and injecting arterial blood from an adjacent arterial vein into said chamber at the center line of flow of the venous blood therethrough and in the direction of flow of the venous blood.
Claim 7
Independent Claim
65 words
The method of supplementing the flow pressure in a vein in the direction of flow comprising connecting an artery in which there is a higher flow pressure to the vein of lower flow pressure requiring supplemental pressure so as to introduce blood from the artery containing the higher pressure flow into the stream of blood of the lower flow pressure in the direction of flow.
Claim 8
Independent Claim
65 words
The method of supplementing the flow pressure in a vein in the direction of flow comprising connecting an artery in which there is a higher flow pressure to the vein of lower flow pressure requiring supplemental pressure so as to introduce blood from the artery containing the higher pressure flow into the stream of blood of the lower flow pressure in the direction of flow.
Claim 9
Independent Claim
109 words
A device for increasing the flow of venous blood to the liver comprising an elongate chamber and a tubular part entering the chamber defining an orifice concentric with the chamber and facing in the direction of one end of the chamber, said chamber having end portions designed to be received into the ends of the portal vein from which a section has been removed and tied to provide a substitute flow path for the removed section and the exterior end of the tubular portion being designed to be connected to an arterial vein to conduct arterial blood into the flow path of the venous blood in the portal vein.
Claim 10
Independent Claim
109 words
A device for increasing the flow of venous blood to the liver comprising an elongate chamber and a tubular part entering the chamber defining an orifice concentric with the chamber and facing in the direction of one end of the chamber, said chamber having end portions designed to be received into the ends of the portal vein from which a section has been removed and tied to provide a substitute flow path for the removed section and the exterior end of the tubular portion being designed to be connected to an arterial vein to conduct arterial blood into the flow path of the venous blood in the portal vein.
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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |