US4268476A
Expired / Lapsed
US
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Blood oxygenator
Assignee: Baxter International Inc
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Filing: 1976-05-26
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Granted: 1981-05-19
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Expires: 1996-05-26
Abstract
Abstract There is disclosed a blood oxygenating device having an oxygenating chamber and a heat exchange chamber. The oxygenating chamber consists of a bubbler chamber and a mixing chamber. Oxygen is introduced into the bubbler chamber through a porous diffusion means situated near the inlet of the bubbler chamber. Bubbles pass from the bubbler chamber into a mixing chamber which is provided with a plurality of secondary flow-producing deflectors to promote secondary flow of blood bubbles passing therethrough. The secondary flow results in a highly efficient oxygen-carbon dioxide transfer. The blood bubbles are then passed through a heat exchange chamber and a defoaming means prior to exiting the oxygenating device.
Inventors
- 👤 Donald A. Raible
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; A61M1/325; A61M1/36; A61M1/3621; A61M1/3623; A61M1/369; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with at least one segment having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said serpentine passageway comprising a series of arcuate sections, said sections being contiguous to the wall of said passageway and forming a plurality of opposing sets of spaced-apart protrusions extending outwardly, each protrusion from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 2
Dependent Claim
90 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with at least one segment having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said serpentine passageway comprising a series of arcuate sections, said sections being contiguous to the wall of said passageway and forming a plurality of opposing sets of spaced-apart protrusions extending outwardly, each protrusion from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 3
Dependent Claim
36 words
The oxygenator of claim 1 wherein said oxygenator is further provided with a porous diffusion means capable of introducing oxygen into said column in a direction counter to the flow of blood to form blood bubbles.
Claim 4
Dependent Claim
20 words
The oxygenator of claim 2 wherein said porous diffusion means has pore sizes from approximately 10 to approximately 30 microns.
Claim 5
Dependent Claim
38 words
The oxygenator of claim 2 wherein said diffusion means is centrally positioned within said column to cause blood bubbles to flow in a divergent path around said diffusion means to promote secondary flow of blood bubbles passing therearound.
Claim 6
Dependent Claim
39 words
The oxygenator of claim 1 wherein said oxygenator is further provided with a heat exchange chamber, said column opening into said heat exchange chamber to enable the passage of blood bubbles from said column into said heat exchange chamber.
Claim 7
Dependent Claim
17 words
The oxygenator of claim 5 wherein said heat exchange chamber has a heating conduit helically disposed therein.
Claim 8
Dependent Claim
66 words
The oxygenator of claim 6 wherein said oxygenator is further provided with a defoamer, said defoamer being disposed about said heat exchange chamber, said heat exchange chamber being provided with a defoamer support means to support said defoamer spaced apart from said heat exchange chamber, said heat exchange chamber being positioned to exchange heat with blood flow prior to the passage of blood into said defoamer.
Claim 9
Dependent Claim
25 words
The oxygenator of claim 7 wherein said support means is comprised of a plurality of ribs positioned between said defoamer and said heat exchange chamber.
Claim 10
Dependent Claim
39 words
The oxygenator of claim 1 wherein said oxygenator is further provided with a defoamer, said defoamer being disposed around said column, said column being provided with a defoamer support means to support said defoamer spaced apart from said column.
Claim 11
Dependent Claim
92 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with three sinuously arranged segments in end to end relationship serially disposed, a first segment extending from said first end and communicating with the second segment, said second segment extending from said first segment and communicating with the third segment, and said third segment extending from said second segment to said second end, said second segment having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough.
Claim 12
Dependent Claim
92 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with three sinuously arranged segments in end to end relationship serially disposed, a first segment extending from said first end and communicating with the second segment, said second segment extending from said first segment and communicating with the third segment, and said third segment extending from said second segment to said second end, said second segment having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough.
Claim 13
Dependent Claim
65 words
A bubble-type oxygenator comprising a bubble column, a portion of said column having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said serpentine passageway comprising a series of outwardly projecting sections, said sections forming a plurality of opposing sets of protrusions, said protrusions from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 14
Dependent Claim
65 words
A bubble-type oxygenator comprising a bubble column, a portion of said column having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said serpentine passageway comprising a series of outwardly projecting sections, said sections forming a plurality of opposing sets of protrusions, said protrusions from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 15
Dependent Claim
75 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with a plurality of segments in end to end relationship, at least one of said segments having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said passageway being provided with a plurality of turns so that said blood bubbles are continuously rotated throughout their passage through said passageway.
Claim 16
Dependent Claim
75 words
A bubble-type oxygenator having therein a bubble column having a first end and a second end, said bubble column being provided with a plurality of segments in end to end relationship, at least one of said segments having a serpentine passageway formed therein to promote secondary flow of blood bubbles passing therethrough, said passageway being provided with a plurality of turns so that said blood bubbles are continuously rotated throughout their passage through said passageway.
Claim 17
Dependent Claim
80 words
A bubble-type oxygenator comprising a bubble column having a diffusion means for effecting blood to flow in a divergent path and for producing secondary flow of blood bubbles passing therearound said diffusion means comprising a substantially conical, porous diffusion surface, said diffusion means positioned within said column to enable said diffusion surface to introduce substantially all of the oxygen into said chamber into the flow of blood in a direction counter to the flow of blood to form blood bubbles.
Claim 18
Dependent Claim
80 words
A bubble-type oxygenator comprising a bubble column having a diffusion means for effecting blood to flow in a divergent path and for producing secondary flow of blood bubbles passing therearound said diffusion means comprising a substantially conical, porous diffusion surface, said diffusion means positioned within said column to enable said diffusion surface to introduce substantially all of the oxygen into said chamber into the flow of blood in a direction counter to the flow of blood to form blood bubbles.
Claim 19
Dependent Claim
35 words
The oxygenator of claim 13 wherein said column is provided with a conically shaped wall, said wall spaced apart from said diffusion surface to form a passageway therebetween causing blood to flow through said passageway.
Claim 20
Dependent Claim
47 words
The oxygenator of claims 1, 10, 11 or 12 wherein said oxygenator has a blood inlet and a blood outlet, a defoaming means positioned between said blood inlet and said blood outlet, and wherein said serpentine passageway is positioned between said blood inlet and said defoaming means.
Claim 21
Dependent Claim
13 words
The oxygenator of claim 15 wherein said oxygenator is a hard-shell bubble oxygenator.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |