US5069661A
Expired / Lapsed
US
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Circulatory support system
Assignee: HENODYNAMICS Inc
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Filing: 1988-05-18
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Granted: 1991-12-03
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Expires: 2008-05-18
Abstract
Abstract A low-pressure, low blood trauma hemodynamic support system is disclosed. The system may operate as a relatively static-volume, gravity-fed, extracorporeal blood circulation and oxygenation system that consists essentially of (1) a membrane-type blood oxygenator, (2) a non-occlusive roller pump, and (3) connecting tubes. The tubes connect the system components to create a compact system capable of supporting a patient in circulatory dysfunction who is to undergo a transplant operation, and is awaiting a donor organ.
Inventors
- 👤 Leonard A. Trudell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:06
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/14; A61M1/16; A61M1/1698; A61M1/3623; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
66 words
A fluid circulation and oxygenation system, comprising: a first cannulation; means for oxygenating a fluid circulating in said system, connected to said first cannulation; a pump, connected to said oxygenating means, said pump including a pump tube that is positioned higher than an inlet and an outlet of said pump to thereby trap air bubbles in the fluid; and a second cannulation, connected to said pump.
Claim 2
Dependent Claim
66 words
A fluid circulation and oxygenation system, comprising: a first cannulation; means for oxygenating a fluid circulating in said system, connected to said first cannulation; a pump, connected to said oxygenating means, said pump including a pump tube that is positioned higher than an inlet and an outlet of said pump to thereby trap air bubbles in the fluid; and a second cannulation, connected to said pump.
Claim 3
Dependent Claim
17 words
The system of claim 1, wherein: said pump is substantially incapable of generating a negative inlet pressure.
Claim 4
Dependent Claim
19 words
The system of claim 1, wherein: said pump is a non-occlusive roller pump employing a flat-profiled, elastic pump tube.
Claim 5
Dependent Claim
30 words
The system of claim 1, wherein said oxygenator further comprises: an integral housing and gas heater; and thermal insulating means, operative to thermally insulate said integral housing and gas heater.
Claim 6
Dependent Claim
26 words
The system of claim 1, further comprising: counterpulsation means, said counterpulsation means being operative to detect the patient's heartbeat and to time pump output pulses accordingly.
Claim 7
Dependent Claim
44 words
The system of claim 1, further comprising: an electrocardiogram, said electrocardiogram being operative to produce a signal corresponding to a patient's heartbeat; and timing means, said timing means being operative to control said pump's output pulses in accordance with the signal from said electrocardiogram.
Claim 8
Dependent Claim
24 words
The system of claim 1, further comprising: perfusion pressure transducer means, said means being operative to produce a signal corresponding to pump outlet pressure.
Claim 9
Dependent Claim
23 words
The system of claim 1, further comprising: a flow-probe, said flow-probe being operative to produce a signal corresponding to pump outlet flow rate.
Claim 10
Dependent Claim
90 words
A fluid circulation and oxygenation system, comprising: a first cannulation; means for oxygenating a fluid circulating in said system, connected to said first cannulation; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for sensing when the heart of said patient is being which indicates when the aortic valve of the heart is open and closed; means for causing said pump to operate in a counterpulsation fashion to pump said fluid only when said aortic valve is closed; and a second cannulation, connected to an outlet of said pump.
Claim 11
Dependent Claim
90 words
A fluid circulation and oxygenation system, comprising: a first cannulation; means for oxygenating a fluid circulating in said system, connected to said first cannulation; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for sensing when the heart of said patient is being which indicates when the aortic valve of the heart is open and closed; means for causing said pump to operate in a counterpulsation fashion to pump said fluid only when said aortic valve is closed; and a second cannulation, connected to an outlet of said pump.
Claim 12
Dependent Claim
14 words
The system of claim 9, wherein: said oxygenating means is a flat-sheet membrane-type oxygenator.
Claim 13
Dependent Claim
15 words
The system of claim 10, wherein: said oxygenator employs a fan-folded, interdigitated, porous flat-sheet membrane.
Claim 14
Dependent Claim
21 words
The system of claim 9, wherein: the rated flow-through capacity of said oxygenating means is approximately three times normal system flow.
Claim 15
Dependent Claim
30 words
The system of claim 9, further comprising: pressure transducer means, said pressure transducer means being operative to produce a signal corresponding to the fluid inlet pressure of said oxygenating means.
Claim 16
Dependent Claim
30 words
The system of claim 9, further comprising: pressure transducer means, said pressure transducer means being operative to produce a signal corresponding to the fluid outlet pressure of said oxygenating means.
Claim 17
Dependent Claim
27 words
The system of claim 9, further comprising: gas pressure regulator means, said gas pressure regulator means being operative to regulate inlet gas pressure to said oxygenating means.
Claim 18
Dependent Claim
56 words
The system of claim 9, further comprising: inlet gas pressure transducer means, said inlet gas pressure transducer means being operative to produce a signal corresponding to gas pressure into said oxygenating means; and a servo-mechanism, said servo-mechanism being operative to adjust the oxygenator ventilation rate in accordance with the signal from said inlet gas pressure transducer.
Claim 19
Dependent Claim
49 words
The system of claim 9, further comprising: shim pressure transducer means, said shim pressure transducer means being operative to produce a signal corresponding to shim pressure; and a servo-mechanism, said servo-mechanism being operative to adjust the shim pressure in accordance with the signal from said shim pressure transducer means.
Claim 20
Dependent Claim
100 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; oxygenating means connected to said venous cannulation for oxygenating blood flowing through said system, said oxygenating means having sufficient flow-through capacity in excess of the flow from said venous cannulation that said oxygenating means functions as its own venous reservoir; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for causing said pump to operate in a counterpulsation fashion; and an arterial cannulation, connected to said pump, through which blood may be returned by said pump to a patient.
Claim 21
Dependent Claim
100 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; oxygenating means connected to said venous cannulation for oxygenating blood flowing through said system, said oxygenating means having sufficient flow-through capacity in excess of the flow from said venous cannulation that said oxygenating means functions as its own venous reservoir; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for causing said pump to operate in a counterpulsation fashion; and an arterial cannulation, connected to said pump, through which blood may be returned by said pump to a patient.
Claim 22
Dependent Claim
94 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; a non-occlusive, pulsatile pump, connected to said venous cannulation; means for causing said pump to operate in a counterpulsation fashion; means for oxygenating blood, connected to said pump, said oxygenating means having sufficient flow-through capacity in excess of the flow from said pump that said oxygenating means functions as its own venous reservoir; and an arterial cannulation, connected to said oxygenating means, through which blood may be returned by said pump to a patient.
Claim 23
Dependent Claim
94 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; a non-occlusive, pulsatile pump, connected to said venous cannulation; means for causing said pump to operate in a counterpulsation fashion; means for oxygenating blood, connected to said pump, said oxygenating means having sufficient flow-through capacity in excess of the flow from said pump that said oxygenating means functions as its own venous reservoir; and an arterial cannulation, connected to said oxygenating means, through which blood may be returned by said pump to a patient.
Claim 24
Dependent Claim
108 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; oxygenating means connected to said venous cannulation for oxygenating blood flowing through said system; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for sensing when the heart of said patient is beating which indicates when the aortic valve of the heart is open and closed; means for causing said pump to operate in a counterpulsation fashion to pump blood only when said aortic valve is closed; and an arterial cannulation, connected to said pump, through which blood may be returned by said pump to said patient.
Claim 25
Dependent Claim
108 words
An extracorporeal blood circulation and oxygenation system, comprising: a venous cannulation through which blood may be drawn from a patient; oxygenating means connected to said venous cannulation for oxygenating blood flowing through said system; a non-occlusive, pulsatile pump, connected to said oxygenating means; means for sensing when the heart of said patient is beating which indicates when the aortic valve of the heart is open and closed; means for causing said pump to operate in a counterpulsation fashion to pump blood only when said aortic valve is closed; and an arterial cannulation, connected to said pump, through which blood may be returned by said pump to said patient.
Claim 26
Dependent Claim
62 words
A blood circulation and oxygenation system, having a fluid circulation path consisting essentially of: a first cannulation; means for oxygenating blood circulating in said system, connected to said first cannulation; a non-occlusive, pulsatile pump, connected to said oxygenating means; including means for causing said pump to operate in a counter-pulsation fashion and a second cannulation, connected to an outlet of said pump.
Claim 27
Dependent Claim
62 words
A blood circulation and oxygenation system, having a fluid circulation path consisting essentially of: a first cannulation; means for oxygenating blood circulating in said system, connected to said first cannulation; a non-occlusive, pulsatile pump, connected to said oxygenating means; including means for causing said pump to operate in a counter-pulsation fashion and a second cannulation, connected to an outlet of said pump.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |