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US4568327A
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Method and apparatus for the removal of gases physically dissolved by dialysis in the blood
Assignee: Université de Sherbrooke
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Filing: 1984-02-27
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Granted: 1986-02-04
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Expires: 2004-02-27
Abstract
Abstract The disclosure herein describes a method and apparatus for the removal, by dialysis, of gases physically dissolved in the blood of a person, more particularly a diver or an aviator; the blood is brought into contact, in an exchange cell, with a membrane permeable to gases only; a liquid having high solubility for gases is circulated on the side of the membrane so that the gases dissolved in the blood are made to follow their chemical potential gradient across the membrane into the liquid.
Inventors
- 👤 Wolf D. Seufert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:03
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M1/14; A61M1/16; A61M2202/00; A61M2202/02; A61M2202/04; A61M2202/0413; A61M2202/0468; A61M2202/0476
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A method for the removal, by dialysis, of gases physically dissolved in the blood of a person, such as a diver or an aviator, comprising the steps of: bringing the blood from a cannulated vein of the person into contact in an exchange cell with a membrane permeable to gases only; and circulating a liquid having high solubility for gases on the side of said membrane whereby the gases dissolved in the blood are made to follow their chemical potential gradient across said membrane into said liquid.
Claim 2
Independent Claim
87 words
A method for the removal, by dialysis, of gases physically dissolved in the blood of a person, such as a diver or an aviator, comprising the steps of: bringing the blood from a cannulated vein of the person into contact in an exchange cell with a membrane permeable to gases only; and circulating a liquid having high solubility for gases on the side of said membrane whereby the gases dissolved in the blood are made to follow their chemical potential gradient across said membrane into said liquid.
Claim 3
Dependent Claim
20 words
A method as defined in claim 1, wherein the circulation of the liquid is done countercurrent to the blood flow.
Claim 4
Dependent Claim
14 words
A method as defined in claim 1, wherein said liquid is a perfluorocarbon liquid.
Claim 5
Dependent Claim
12 words
A method as defined in claim 3, wherein said liquid is perfluorodecalin.
Claim 6
Dependent Claim
12 words
A method as defined in claim 3, wherein said liquid is perfluorotributylamine.
Claim 7
Dependent Claim
13 words
A method as defined in claim 1, wherein said liquid is a silicone.
Claim 8
Dependent Claim
19 words
A method as defined in claim 1, wherein the blood and the liquid are pumped through the exchange cell.
Claim 9
Dependent Claim
24 words
A method as defined in claim 1, further comprising the step of monitoring the flow of blood between the cannulated vein and the membrane.
Claim 10
Dependent Claim
24 words
A method as defined in claim 1, further comprising the step of monitoring the liquid as it circulates on the side of the membrane.
Claim 11
Dependent Claim
22 words
A method as defined in claim 9, further comprising heating said liquid to a temperature corresponding substantially to that of said blood.
References Cited (Backward Citations)
US4001141A
Cited
US3994799A
Cited
US4003554A
Cited
US4127481A
Cited
US4303068A
Cited
US4410338A
Cited
US4439217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |