US4372914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood oxygenator
Assignee: Baxter International Inc
•
Filing: 1981-04-27
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Granted: 1983-02-08
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Expires: 2001-04-27
Abstract
Abstract 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
2026-10-22 17:06
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; A61M1/325; A61M1/36; A61M1/369; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A bubble-type blood 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, and a heat exchange conduit helically disposed in the bubble column of said oxygenator.
Claim 2
Dependent Claim
88 words
A bubble-type blood 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, and a heat exchange conduit helically disposed in the bubble column of said oxygenator.
Claim 3
Dependent Claim
13 words
The oxygenator of claim 1 wherein said oxygenator is a hard shell oxygenator.
Claim 4
Dependent Claim
25 words
The oxygenator of claim 1 wherein said oxygenator is provided with a defoaming means and wherein said passageway is located upstream from said defoaming means.
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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) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |