US3960657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for oxygenating blood
Assignee: BWXT Intech Inc
•
Filing: 1975-07-24
•
Granted: 1976-06-01
•
Expires: 1995-07-24
Abstract
Abstract A method for oxygenating blood by combining blood and oxygen in a receptacle to form a foam, the foam flowing upwardly through a bead bed having a multitude of tortuous paths and contact surfaces. The oxygenated blood is then defoamed and collected for recirculation to the patient.
Inventors
- 👤 Wallace W. Bowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:45
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0031; A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; A61M1/325; Y; Y10; Y10S; Y10S435/00; Y10S435/818
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A method for oxygenating blood employing an elongated lattice chamber having a multiplicity of immovable rounded surfaces disposed throughout its volume thereby creating a plurality of tortuous paths through said lattice chamber, said method comprising the steps of: flowing a supply of venous blood into a receptacle adjacent one end of said lattice chamber; introducing oxygen bubbles into the blood in said receptacle; mixing the blood and oxygen bubbles together to form a blood foam comprising bubbles formed of a blood surface surrounding a volume of oxygen; flowing the blood foam substantially unidirectionally through said lattice chamber whereby said blood surfaces of said blood foam bubbles collide with a multiplicity of said rounded surfaces in moving, frictional, wiping contact therewith, thereby resulting in the transfer of oxygen to said blood surfaces from the oxygen contained within said blood foam bubbles, whereby oxygenation of the venous blood is achieved; and breaking down the oxygenated blood foam into oxygenated fluid blood and gases.
Claim 2
Independent Claim
161 words
A method for oxygenating blood employing an elongated lattice chamber having a multiplicity of immovable rounded surfaces disposed throughout its volume thereby creating a plurality of tortuous paths through said lattice chamber, said method comprising the steps of: flowing a supply of venous blood into a receptacle adjacent one end of said lattice chamber; introducing oxygen bubbles into the blood in said receptacle; mixing the blood and oxygen bubbles together to form a blood foam comprising bubbles formed of a blood surface surrounding a volume of oxygen; flowing the blood foam substantially unidirectionally through said lattice chamber whereby said blood surfaces of said blood foam bubbles collide with a multiplicity of said rounded surfaces in moving, frictional, wiping contact therewith, thereby resulting in the transfer of oxygen to said blood surfaces from the oxygen contained within said blood foam bubbles, whereby oxygenation of the venous blood is achieved; and breaking down the oxygenated blood foam into oxygenated fluid blood and gases.
Claim 3
Dependent Claim
32 words
The method for oxygenating blood according to claim 1 and further comprising the steps of: venting said gases from the vicinity of said oxygenated fluid blood; and collecting said oxygenated fluid blood.
Claim 4
Dependent Claim
37 words
The method for oxygenating blood according to claim 1 wherein said breaking down step includes the step of bringing said blood foam into simultaneous contact with a multiplicity of adjacent, alternately fluid attracting and fluid repelling fibers.
Claim 5
Dependent Claim
80 words
The method for oxygenating blood according to claim 1 wherein said step of introducing oxygen bubbles into said receptacle comprises the steps of: injecting said oxygen bubbles into said venous blood at a flow velocity greater than the flow velocity of the flow of said blood into said receptacle and in the same direction as said blood flow to form a mixture of blood and oxygen; and expanding said mixture of oxygen and venous blood to form a blood foam.
Claim 6
Dependent Claim
34 words
A method for oxygenating blood according to claim 1 and further comprising the steps of: adjusting the temperature of said oxygenated fluid blood; and measuring and storing a supply of said oxygenated fluid blood.
Claim 7
Dependent Claim
35 words
The method for oxygenating blood according to claim 1 and further comprising the step of spreading the bubbles of said blood foam substantially uniformly over the cross-section of the inlet end of said lattice chamber.
References Cited (Backward Citations)
SU302125A1
Cited
US2934067A
Cited
DE1089125B
Cited
US3175555A
Cited
US3204631A
Cited
US3291568A
Cited
US3468631A
Cited
US3513845A
Cited
US3488158A
Cited
US3547591A
Cited
US3578411A
Cited
US3729377A
Cited
US3769162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |