US4818490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral blood oxygenator
Assignee: Gambro Renal Products Inc
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Filing: 1987-08-13
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Granted: 1989-04-04
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Expires: 2007-08-13
Abstract
Abstract A membrane type blood oxygenating system with the membrane device, blood heater and blood reservoir constructed as an integral unit with the membrane device located lower than the blood reservoir.
Inventors
- 👤 Gary A. Carson
- 👤 Roger J. Elgas
- 👤 Timothy M. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; A61M1/1621; A61M1/1629; A61M1/36; A61M1/3621; A61M1/3623; A61M5/00; A61M5/44; A61M1/369; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
Blood oxygenating apparatus for oxygenating venous blood removed from a patient, said apparatus comprising a membrane oxygen-to-blood transfer portion and a venous blood reservoir portion, said reservoir portion being of such rigidity that change of contents volume causes no corresponding change of reservoir portion volume, being so oriented that with change in contents volume a generally horizontal surface of contents rises or falls in said blood reservoir portion, and being disposed above said transfer portion, and means for delivering to and maintaining in said reservoir portion a substantial but varying volume of venous blood.
Claim 2
Dependent Claim
94 words
Blood oxygenating apparatus for oxygenating venous blood removed from a patient, said apparatus comprising a membrane oxygen-to-blood transfer portion and a venous blood reservoir portion, said reservoir portion being of such rigidity that change of contents volume causes no corresponding change of reservoir portion volume, being so oriented that with change in contents volume a generally horizontal surface of contents rises or falls in said blood reservoir portion, and being disposed above said transfer portion, and means for delivering to and maintaining in said reservoir portion a substantial but varying volume of venous blood.
Claim 3
Dependent Claim
17 words
The blood oxygenating apparatus of claim 1 which includes also within said reservoir portion a blood defoamer.
Claim 4
Dependent Claim
20 words
The blood oxygenating apparatus of claim 1 in which a wall defining said blood reservoir portion therearound is rigid throughout.
Claim 5
Dependent Claim
35 words
The apparatus of claim 3 further comprising a blood heater, said transfer portion, said wall, and said heater being constructed as an integral unit to avoid placing the reservoir portion lower than the transfer portion.
Claim 6
Dependent Claim
60 words
The apparatus of claim 4 wherein said wall is made of clear material, and further comprising a light colored member fixedly mounted within said blood reservoir portion and having an upper surface within said reservoir portion so that when blood contained in the reservoir portion drops below the upper surface, the light colored member is exposed, indicating low blood level.
Claim 7
Dependent Claim
18 words
The apparatus of claim 5 wherein said heater is provided in a lower portion under said reservoir portion.
References Cited (Backward Citations)
US4620965A
Cited
US4698207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |