US3907504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood oxygenation system including automatic means for stabilizing the flow rate of blood therethrough
Assignee: General Electric Co
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Filing: 1973-04-06
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Granted: 1975-09-23
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Expires: 1993-04-06
Abstract
Abstract An apparatus for sensing and signaling changes in the pressure and volume of a fluid passing therethrough, the apparatus comprising: (a) a hollow chamber; (b) a compliant reservoir for holding the fluid, the reservoir being located in the hollow chamber and being fitted with inlets and outlets for the fluid; and (c) a motion actuated means in the chamber for signaling changes in the size of the compliant reservoir. In one embodiment, the apparatus is used in an extracorporeal circuit to sense changes in the pressure and volume of blood and to signal the speed controller on a blood transfer pump in the blood circuit.
Inventors
- 👤 Gary W Hammond
- 👤 Donald R Ingenito
- 👤 Gunnar E Walmet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3639; A61M1/3623; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
198 words
AN APPARATUS FOR EXTRACORPOREALLY OXYGENATING THE BLOOD OF A LIVING PATIENT COMPRISING IN COMBINATION I. AT LEAST ONE PUMPING MEANS FOR THE BLOOD II. OXYGENATING MEANS FOR THE BLOOD, III. MEANS FOR SENSING AND SIGNALLING CHANGES IN THE PRESSURE AND VOLUME OF BLOOD PASSING THROUGH SAID APPARATUS, SAID SENSING AND SIGNALLING MEANS COMPRISING: A, A HOLLOW CHAMBER OF A SELECTIVELY FIXED AND ADJUSTALE VOLUME AND COMPRISING A BASE PIECE AND A COVER PIECE, B. A COMPLIANT RESERVOIR FOR HOLDING SAID BLOOD, SAID RESERVOIR BEING DISPOSED WITHIN SAID HOLLOW CHAMBER AND INCLUDING AN INLET AND AN OUTLET PORT FOR SAID BLOOD, SAID HOLLOW CHAMBER SUBSTANTIALLY LIMITING THE MAXIMUM EXPANSION VOLUME OF SAID COMPLAINT RESERVOIR AND C. MOTION ACTIVATED MEANS IN SAID HOLLOW CHAMBER FOR GENERATING AN ELECTRICAL SIGNAL PROPORTIONATE TO CHANGES IN THE SIZE OF SAID COMPLIANT RESERVOIR, AND D. ADJUSTING MEANS MOVABLY ATTACHING SAID COVER PIECE TO SAID BASE PIECE TO PERMIT SELECTIVE ADJUSTMENT OF THE VOLUME OF SAID HOLLOW CHAMBER BY MOVEMENT OF SAID COVER PIECE RELATIVE TO SAID BASE PIECE, AND IV. PUMP SPEED CONTROLLING MEANS BEING OPERATIVELY CONNECTED TO RECEIVE SAID SIGNAL FROM SAID MOTON ACTIVATED MEANS AND TO AUTOMATICALLY ADJUST THE OPERATION OF SAID
Claim 2
Independent Claim
198 words
AN APPARATUS FOR EXTRACORPOREALLY OXYGENATING THE BLOOD OF A LIVING PATIENT COMPRISING IN COMBINATION I. AT LEAST ONE PUMPING MEANS FOR THE BLOOD II. OXYGENATING MEANS FOR THE BLOOD, III. MEANS FOR SENSING AND SIGNALLING CHANGES IN THE PRESSURE AND VOLUME OF BLOOD PASSING THROUGH SAID APPARATUS, SAID SENSING AND SIGNALLING MEANS COMPRISING: A, A HOLLOW CHAMBER OF A SELECTIVELY FIXED AND ADJUSTALE VOLUME AND COMPRISING A BASE PIECE AND A COVER PIECE, B. A COMPLIANT RESERVOIR FOR HOLDING SAID BLOOD, SAID RESERVOIR BEING DISPOSED WITHIN SAID HOLLOW CHAMBER AND INCLUDING AN INLET AND AN OUTLET PORT FOR SAID BLOOD, SAID HOLLOW CHAMBER SUBSTANTIALLY LIMITING THE MAXIMUM EXPANSION VOLUME OF SAID COMPLAINT RESERVOIR AND C. MOTION ACTIVATED MEANS IN SAID HOLLOW CHAMBER FOR GENERATING AN ELECTRICAL SIGNAL PROPORTIONATE TO CHANGES IN THE SIZE OF SAID COMPLIANT RESERVOIR, AND D. ADJUSTING MEANS MOVABLY ATTACHING SAID COVER PIECE TO SAID BASE PIECE TO PERMIT SELECTIVE ADJUSTMENT OF THE VOLUME OF SAID HOLLOW CHAMBER BY MOVEMENT OF SAID COVER PIECE RELATIVE TO SAID BASE PIECE, AND IV. PUMP SPEED CONTROLLING MEANS BEING OPERATIVELY CONNECTED TO RECEIVE SAID SIGNAL FROM SAID MOTON ACTIVATED MEANS AND TO AUTOMATICALLY ADJUST THE OPERATION OF SAID
Claim 3
Dependent Claim
65 words
An apparatus as defined in claim 1 wherein two pumping means are utilized, one being a venous pumping means located upstream of said oxygenating means and the other being an arterial pumping means located downstream of said oxygenating means and wherein said pump speed controlling means is operatively connected to said arterial pumping means to automatically adjust the flow rate thereof responsive to said signal.
Claim 4
Dependent Claim
21 words
An apparatus as defined in claim 1 wherein said oxygenating means for the blood is a membrane type blood-gas exchanging means.
Claim 5
Dependent Claim
17 words
An apparatus as defined in claim 1 wherein a single pumping means is utilized in the apparatus.
Claim 6
Dependent Claim
23 words
An apparatus as defined in claim 4 wherein the single pumping means is a venous pumping means located upstream of said oxygenating means.
Claim 7
Dependent Claim
15 words
An apparatus as defined in claim 1 which also includes a blood heat exchanging means.
Claim 8
Dependent Claim
30 words
An apparatus as defined in claim 6 wherein said oxygenating means for the blood is a membrane type bood-gas exchanging means and the blood heat exchanging means is integral therewith.
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |