US3849071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood-gas separating system for perfusate circulation
Assignee: CR Bard Inc
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Filing: 1973-08-27
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Granted: 1974-11-19
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Expires: 1993-08-27
Abstract
Abstract A blood-gas separating chamber provides an inlet for receiving oxygenated blood along with undissolved gas from an oxygenator unit through a constant displacement pump and further provides an outlet for supplying oxygenated blood free of undissolved gas for corporeal perfusate circulation. A liquid-gas separating element connected between the inlet and the outlet liberates undissolved gas from the blood while a second outlet located at the upper portion of the separating chamber is connected to return blood and separated gas from the upper portion of the chamber back to the oxygenator unit. A freely movable valve member is positioned within the chamber to be responsive to the liquid and gas and moves between a fully open position for permitting the free flow of gas and liquid through the second outlet and a plurality of modulating positions including a position of maximum restriction of the second outlet for permitting a controlled flow of liquid and gas therethrough. One embodiment employs a valve seat at the second outlet having three inwardly protruding projections for permitting a continuous flow of blood and gas through the second outlet while another embodiment employs three projections on the movable valve member.
Inventors
- 👤 K Kayser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M2206/00; A61M2206/10; A61M2206/16; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
A BLOOD-GAS SEPARATING SYSTEM FOR PERFUSATE CIRCULATIO, COMPRISING A BLOOD SUPPLY, BLOOD TRANSFER MEANS CONNECTED TO SAID SUPPLY FOR ADDING A GAS TO BE DISSOLVED BY THE BLOOD RECEIVED FROM SAID SUPPLY AND SUPPLYING BLOOD CONTAINING THE DISSOLVED GAS, AND A BLOOD-GAS SEPARATING MEANS INCLUDING A BLOOD CONDUCTING FIRST OUTLET SUPPLYING BLOOD FOR PERFUSATE CIRCULATION AND A SECOND OUTLET, SAID SEPARATING MEANS RECEIVING BLOOD CONTAINING DISSOLVED GAS AND ANY UNDISSOLVED GAS FROM FROM SAID TRANSFER MEANS AND SEPARATING UNDISSOLVED GAS FROM THE BLOOD CONTAINING DISSOLVED GAS AND PASSING BLOOD FREE OF UNDISSOLVED GAS THROUGH SAID BLOOD CONDUCTING FIRST OUTLET OF PERFUSATE CIRCULATION AND INCLUDING VALVE MEANS RESPONSIVE TO THE PRESENCE OF BLOOD AND UNDISSOLVED GAS WITHIN SAID SEPARATING MEANS, SAID VALVE MEANS CONTROLLING THE FLOW THROUGH SAID SECOND OUTLET AND PROVIDING A MAXIMUM OPEN VALVE POSITION WHEN LARGE ACCUMULATIONS OF UNDISSOLVED GAS IS PRESENT IN SAID SEPERATING MEANS THEREBY PERMITTING THE FREE FLOW OF UNDISSOLVED GAS THROUGH SAID SECOND OUTLET AND A POSITION FOR MAXIMUN RESTRICTION OF SAID SECOND OUTLET WHEN LARGER ACCUMULATIONS OF BLOOD FREE OF UNDISSOLVED GAS IS PRESENT IN SAID SEPARAT ING MEANS THEREBY PERMITTING A CONTROLLED FLOW OF GAS AND BLOOD THROUGH SAID SECOND OUTLET.
Claim 2
Dependent Claim
199 words
A BLOOD-GAS SEPARATING SYSTEM FOR PERFUSATE CIRCULATIO, COMPRISING A BLOOD SUPPLY, BLOOD TRANSFER MEANS CONNECTED TO SAID SUPPLY FOR ADDING A GAS TO BE DISSOLVED BY THE BLOOD RECEIVED FROM SAID SUPPLY AND SUPPLYING BLOOD CONTAINING THE DISSOLVED GAS, AND A BLOOD-GAS SEPARATING MEANS INCLUDING A BLOOD CONDUCTING FIRST OUTLET SUPPLYING BLOOD FOR PERFUSATE CIRCULATION AND A SECOND OUTLET, SAID SEPARATING MEANS RECEIVING BLOOD CONTAINING DISSOLVED GAS AND ANY UNDISSOLVED GAS FROM FROM SAID TRANSFER MEANS AND SEPARATING UNDISSOLVED GAS FROM THE BLOOD CONTAINING DISSOLVED GAS AND PASSING BLOOD FREE OF UNDISSOLVED GAS THROUGH SAID BLOOD CONDUCTING FIRST OUTLET OF PERFUSATE CIRCULATION AND INCLUDING VALVE MEANS RESPONSIVE TO THE PRESENCE OF BLOOD AND UNDISSOLVED GAS WITHIN SAID SEPARATING MEANS, SAID VALVE MEANS CONTROLLING THE FLOW THROUGH SAID SECOND OUTLET AND PROVIDING A MAXIMUM OPEN VALVE POSITION WHEN LARGE ACCUMULATIONS OF UNDISSOLVED GAS IS PRESENT IN SAID SEPERATING MEANS THEREBY PERMITTING THE FREE FLOW OF UNDISSOLVED GAS THROUGH SAID SECOND OUTLET AND A POSITION FOR MAXIMUN RESTRICTION OF SAID SECOND OUTLET WHEN LARGER ACCUMULATIONS OF BLOOD FREE OF UNDISSOLVED GAS IS PRESENT IN SAID SEPARAT ING MEANS THEREBY PERMITTING A CONTROLLED FLOW OF GAS AND BLOOD THROUGH SAID SECOND OUTLET.
Claim 3
Dependent Claim
216 words
A blood-gas separating system for perfusate circulation, comprising a blood supply, blood transfer means connected to said supply for adding an oxygen gas to be dissolved by the blood received from said supply and supplying oxygenated blood to a blood transfer means outlet, and a blood-gas separator including a housing defining a chamber having an inlet receiving oxygenated blood including dissolved and undissolved gas from said transfer means outlet and a blood conducting first outlet supplying blood for perfusate circulation and a second outlet including return means supplying gas and blood to said transfer means, said separator including means located within said chamber for separating undissolved gas from the oxygenated blood and passing blood free of undissolved gas through said first outlet and a valve means responsive to the presence of blood and undissolved gas within said separator chamber, said valve means controlling the flow through said second outlet and providing a maximum open valve position when large accumulations of undissolved gas is present in said chamber thereby permitting the free flow of undissolved gas through said second outlet and a position for maximum restriction of said second outlet when large accumulations of blood free of undissolved gas is present in said chamber thereby permitting a controlled flow of gas and blood through said second outlet.
Claim 4
Dependent Claim
216 words
A blood-gas separating system for perfusate circulation, comprising a blood supply, blood transfer means connected to said supply for adding an oxygen gas to be dissolved by the blood received from said supply and supplying oxygenated blood to a blood transfer means outlet, and a blood-gas separator including a housing defining a chamber having an inlet receiving oxygenated blood including dissolved and undissolved gas from said transfer means outlet and a blood conducting first outlet supplying blood for perfusate circulation and a second outlet including return means supplying gas and blood to said transfer means, said separator including means located within said chamber for separating undissolved gas from the oxygenated blood and passing blood free of undissolved gas through said first outlet and a valve means responsive to the presence of blood and undissolved gas within said separator chamber, said valve means controlling the flow through said second outlet and providing a maximum open valve position when large accumulations of undissolved gas is present in said chamber thereby permitting the free flow of undissolved gas through said second outlet and a position for maximum restriction of said second outlet when large accumulations of blood free of undissolved gas is present in said chamber thereby permitting a controlled flow of gas and blood through said second outlet.
Claim 5
Dependent Claim
52 words
The system of claim 2, wherein said valve means includes a float operating to said position of maximum restriction in response to the accumulation of blood free of undissolved gas within said chamber so that blood and dissolved gas passes through said second outlet and said return means to said transfer means.
Claim 6
Dependent Claim
34 words
The system of claim 2, wherein said transfer means includes an input means connected to said return means and operates to provide a pressure differential between said second output and said transfer means input.
Claim 7
Dependent Claim
34 words
The system of claim 2, wherein said valve means includes a float having a specific gravity which is 95 percent of the specific gravity of blood for providing proper modulation of said second outlet.
Claim 8
Dependent Claim
31 words
The sysTem of claim 2, wherein said return means connecting said second outlet to said transfer means includes a translucent material providing a visual indication of the return flow of blood.
Claim 9
Dependent Claim
41 words
The system of claim 2, wherein said separator inlet is acutely connected to said housing and permits a circular flow of blood and gas-containing bubbles within said chamber so that the bubbles may concentrate at a central portion of said chamber.
Claim 10
Dependent Claim
49 words
The system of claim 2, wherein said valve means includes a float operating to said maximum open valve position in response to large accumulations of undissolved gas within said chamber and permits maximum flow of undissolved gas through said second outlet and said return means to said transfer means.
Claim 11
Dependent Claim
58 words
The system of claim 8, wherein said transfer means includes a constant displacement pumping means operating to reduce the pressure within said chamber in response to the supply of large accumulations of undissolved gas within said chamber and permitting blood to cease flow through said first outlet and preventing the flow of undissolved gas through said first outlet.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |