Patent FR847431A successfully refreshed from Google Patents.
Patent US4623518A successfully refreshed from Google Patents.
US4623518A
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US
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Blood oxygenator
Assignee: Baxter International Inc
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Filing: 1985-08-12
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Granted: 1986-11-18
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Expires: 2005-08-12
Abstract
Abstract A blood oxygenating device having an oxygenating chamber and a heat exchanger 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
2026-10-30 07:17
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: 12
Claim 1
Independent Claim
102 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in a bubble-type blood oxygenator which oxygenator contains 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 pair of undulate walls, each wall having a continuous series of projecting sections oriented into the serpentine passageway, said sections on said undulate walls 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 2
Independent Claim
102 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in a bubble-type blood oxygenator which oxygenator contains 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 pair of undulate walls, each wall having a continuous series of projecting sections oriented into the serpentine passageway, said sections on said undulate walls 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 3
Dependent Claim
16 words
The method of claim 1 wherein said blood containing said bubbles is subjected to heat transfer.
Claim 4
Independent Claim
113 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in a bubble-type blood 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 pair of undulate walls, each wall continuous series of arcuate sections, said sections on said undulate walls forming a plurality of opposing sets of spaced-apart protrusions extending into the serpentine passageway, each protrusion from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 5
Independent Claim
113 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in a bubble-type blood 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 pair of undulate walls, each wall continuous series of arcuate sections, said sections on said undulate walls forming a plurality of opposing sets of spaced-apart protrusions extending into the serpentine passageway, each protrusion from said opposing sets being offset from each other to form a substantially unrestricted passageway therethrough.
Claim 6
Independent Claim
15 words
The method of 3 wherein said blood containing said bubbles is subjected to heat transfer.
Claim 7
Independent Claim
15 words
The method of 3 wherein said blood containing said bubbles is subjected to heat transfer.
Claim 8
Independent Claim
103 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in 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 comprising a pair of undulate walls, each wall having a continuous series of arcuate sections with a plurality of turns so that said blood bubbles are continuously rotated throughout their passage through said passageway.
Claim 9
Independent Claim
103 words
A method of oxygenating blood which method comprises forming bubbles in blood with an oxygen-rich gas in 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 comprising a pair of undulate walls, each wall having a continuous series of arcuate sections with a plurality of turns so that said blood bubbles are continuously rotated throughout their passage through said passageway.
Claim 10
Dependent Claim
16 words
The method of claim 5 wherein said blood containing said bubbles is subjected to heat transfer.
Claim 11
Independent Claim
45 words
The method of claims 1,3, or 5 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 12
Independent Claim
46 words
The method of claims 2, 4 or 6 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.
References Cited (Backward Citations)
SU302125A1
Cited
US2833279A
Cited
US2934067A
Cited
US3175555A
Cited
US3204631A
Cited
US3468631A
Cited
US3488158A
Cited
US3578411A
Cited
US3615238A
Cited
US3870470A
Cited
US3927152A
Cited
US3769162A
Cited
US3994689A
Cited
US4203945A
Cited
US3770384A
Cited
US3764271A
Cited
US3978176A
Cited
US3898045A
Cited
US3892534A
Cited
US4248828A
Cited
US4065264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |