Patent US5225161A successfully refreshed from Google Patents.
US5225161A
Expired / Lapsed
US
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Integrated membrane blood oxygenator/heat exchanger
Assignee: Jostra Bentley Inc
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Filing: 1992-03-10
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Granted: 1993-07-06
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Expires: 2012-03-10
Abstract
Abstract A device including an integrally formed membrane oxygenator and heat exchange device positioned in a single housing. The device includes a thermally conductive body formed with a plurality of blood pathways on its surface, and a gas permeable membrane, or membranes positioned in the housing in substantial contact with the heat exchange body to cover or lie within a portion of each of the pathways. The membrane defines a gas pathway separate from the blood pathway through which a gas is directed. The blood is directed through the individual blood pathways. The device also includes various ports and passageways for delivering the blood to the individual channels, and for collecting and removing the blood from the device.
Inventors
- 👤 Wilfred F. Mathewson
- 👤 Richard L. Bringham
- 👤 Philip L. Ritger
- 👤 David L. Karshmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:07
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1621; A61M1/1623; A61M1/1625; A61M1/1629; A61M1/1698; A61M1/36; A61M1/3621; A61M1/3623; B01D2313/00; B01D2313/22; B01D2313/221; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
59 words
A blood oxygenator and heat exchange device comprising a body means for defining a plurality of pathways through which blood can be passed, with each of said pathways having disposed therein multiple gas permeable membranes and defined at least partially by a pair of heat exchange surfaces, each of said pathways being between said pair of heat exchange surfaces.
Claim 2
Dependent Claim
59 words
A blood oxygenator and heat exchange device comprising a body means for defining a plurality of pathways through which blood can be passed, with each of said pathways having disposed therein multiple gas permeable membranes and defined at least partially by a pair of heat exchange surfaces, each of said pathways being between said pair of heat exchange surfaces.
Claim 3
Dependent Claim
45 words
The device of claim 1 wherein said multiple gas permeable membranes are substantially contiguous to said pair of heat exchange surfaces so that said multiple gas permeable membranes and said pair of heat exchange surfaces are in intimate contact with blood flowing through said pathways.
Claim 4
Dependent Claim
75 words
A blood oxygenator and heat exchange device comprising: a housing formed to allow blood to pass there through; and heat and gas exchange means positioned in said housing for selectively exchanging heat and gas with blood passing through said housing, said exchange means at least partially forming a plurality of blood flow pathways, each pathway being formed between at least a pair of thermally conductive walls and having at least a first gas permeable membrane.
Claim 5
Dependent Claim
75 words
A blood oxygenator and heat exchange device comprising: a housing formed to allow blood to pass there through; and heat and gas exchange means positioned in said housing for selectively exchanging heat and gas with blood passing through said housing, said exchange means at least partially forming a plurality of blood flow pathways, each pathway being formed between at least a pair of thermally conductive walls and having at least a first gas permeable membrane.
Claim 6
Dependent Claim
38 words
The device of claim 3 wherein each of said pathways includes a plurality of gas permeable membranes, with each of said membranes being spatially separated from adjacently positioned membranes to allow for the flow of blood there between.
Claim 7
Dependent Claim
44 words
The device of claim 3 wherein each of said pathways includes a plurality of porous hollow tubular gas exchange membranes, with the internal portion of each of said porous hollow tubular membranes defining a passage through which may be directed an oxygen bearing gas.
Claim 8
Dependent Claim
29 words
The device of claim 5 wherein each of said porous hollow tubular membranes are spatially separated from adjacent tubular membranes to allow for the flow of blood there between.
Claim 9
Dependent Claim
63 words
The device of claim 3 wherein each of said at least a pair of thermally conductive walls is formed to define a channel through which blood can pass, with each of said gas permeable membranes being positioned between said at least a pair of thermally conductive walls in a respective one of said defined channels, and at least partially filling said respective channel.
Claim 10
Dependent Claim
128 words
A blood oxygenator and heat exchange device comprising: housing; a thermally conductive heat exchange body disposed within said housing; said thermally conductive body having an external surface formed to define a plurality of blood receiving channels; blood ports formed in said housing for selectively distributing blood through each said blood receiving channels; heat exchange means for selective heating or cooling of said thermally conductive heat exchange body, said plurality of blood receiving channels and the blood flowing therethrough; at least a first gas permeable membrane which is positioned in said housing to define a gas flow pathway and which is formed to be partially received in each of said blood receiving channels; and gas ports formed in said housing for directing a gas through said gas flow pathway.
Claim 11
Dependent Claim
128 words
A blood oxygenator and heat exchange device comprising: housing; a thermally conductive heat exchange body disposed within said housing; said thermally conductive body having an external surface formed to define a plurality of blood receiving channels; blood ports formed in said housing for selectively distributing blood through each said blood receiving channels; heat exchange means for selective heating or cooling of said thermally conductive heat exchange body, said plurality of blood receiving channels and the blood flowing therethrough; at least a first gas permeable membrane which is positioned in said housing to define a gas flow pathway and which is formed to be partially received in each of said blood receiving channels; and gas ports formed in said housing for directing a gas through said gas flow pathway.
Claim 12
Dependent Claim
36 words
The device of claim 8 wherein said heat exchange means is an internal chamber formed in said thermally conductive body for receiving a heat exchange fluid for selective cooling or heating of said thermally conductive body.
Claim 13
Dependent Claim
31 words
The device of claim 9 wherein said at least a first gas permeable membrane is a plurality of individual gas permeable membranes selectively positioned in each of said blood receiving channels.
Claim 14
Dependent Claim
26 words
The device of claim 10 wherein said individual gas permeable membranes are a plurality of porous hollow fibers positioned in each of said blood receiving channels.
Claim 15
Dependent Claim
34 words
The device of claim 11 wherein said plurality of hollow fibers positioned in each of said blood receiving channels are spatially separated from each other to allow for the flow of blood there between.
Claim 16
Dependent Claim
15 words
A device of claim 10 wherein said individual gas permeable membranes are porous hollow fibers.
Claim 17
Dependent Claim
29 words
The device of claim 8 wherein said heat exchange means is positioned in said thermally conductive body and is constructed and arranged operable for heating or cooling said body.
Claim 18
Dependent Claim
178 words
A blood oxygenator and heat exchange device comprising: a housing; a thermally conductive body positioned in said housing to subdivide said housing into first and second separate chambers, said thermally conductive body having a first surface facing into said second chamber which is formed with a plurality of blood receiving channels; blood delivery and receiving ports formed in said housing for delivering and receiving blood from said plurality of blood receiving channels; heat exchange means positioned in said housing first chamber, said heat exchange means being constructed and arranged for heating or cooling said thermally conductive body, said plurality of blood receiving channels and the blood flowing therethrough; at least a first gas permeable membrane means positioned in said second chamber and partially within each of said blood receiving channels, said at least a first membrane means and said second chamber defining a gas passageway separated from said plurality of blood receiving channels by said at least a first membrane means; and a gas delivery port formed in said housing for directing a gas into said second chamber.
Claim 19
Dependent Claim
178 words
A blood oxygenator and heat exchange device comprising: a housing; a thermally conductive body positioned in said housing to subdivide said housing into first and second separate chambers, said thermally conductive body having a first surface facing into said second chamber which is formed with a plurality of blood receiving channels; blood delivery and receiving ports formed in said housing for delivering and receiving blood from said plurality of blood receiving channels; heat exchange means positioned in said housing first chamber, said heat exchange means being constructed and arranged for heating or cooling said thermally conductive body, said plurality of blood receiving channels and the blood flowing therethrough; at least a first gas permeable membrane means positioned in said second chamber and partially within each of said blood receiving channels, said at least a first membrane means and said second chamber defining a gas passageway separated from said plurality of blood receiving channels by said at least a first membrane means; and a gas delivery port formed in said housing for directing a gas into said second chamber.
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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) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |