US3733776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid membrane artificial lung
Assignee: Individual
•
Filing: 1970-09-16
•
Granted: 1973-05-22
•
Expires: 1990-09-16
Abstract
Abstract An artificial lung is created by contacting liquid membrane encapsulated, oxygen containing gas bubbles with blood. The oxygen permeates the membrane rapidly going into the blood. The CO2 initially in the blood permeates the membrane going into the bubble where the initial CO2 partial pressure is lower. In this manner the blood is oxygenated and CO2 is simultaneously removed.
Inventors
- 👤 N Li
- 👤 W Asher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:10
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; B; B01; B01D; B01D61/00; B01D61/38; B01D61/40; A61M2202/00; A61M2202/04; A61M2202/0468; A61M2202/0476; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
15 words
The process of claim 1 wherein said membrane is a fluorocarbon or a derivative thereof.
Claim 2
Dependent Claim
36 words
The process of claim 1 wherein the concentration gradient of the CO2 in the blood is higher than in said bubble and at least a portion of the CO2 in said blood passes into said bubble.
Claim 3
Dependent Claim
14 words
The process of claim 3 wherein said membrane is a fluorinated surface active ether.
Claim 4
Dependent Claim
14 words
The process of claim 3 wherein said membrane is a C5 to C15 fluorocarbon.
Claim 5
Dependent Claim
83 words
A process for oxygenating human blood and removing carbon dioxide from said blood which comprises contacting said blood with gas bubbles said bubbles being coated with a liquid surfactant membrane and encompassing oxygen said membrane permitting the passage of oxygen into the bloodstream, maintaining a higher partial pressure of carbon dioxide in said bloodstream than in said bubble whereby oxygen permeates through said membrane into said bloodstream and carbon dioxide permeates into said bubble and removing a foam comprising carbon dioxide enriched bubbles.
Claim 6
Dependent Claim
13 words
The process of claim 6 wherein said surfactant is a surface active fluorocarbon.
Claim 7
Dependent Claim
14 words
The process of claim 7 wherein said fluorocarbon is a fluorinated surface active ether.
Claim 8
Dependent Claim
14 words
The process of claim 7 wherein said fluorocarbon is a C5 to C15 fluorocarbon.
Claim 9
Dependent Claim
18 words
The process of claim 6 wherein said contacting takes place at a temperature of 4* to 40* C.
Claim 10
Dependent Claim
16 words
The process of claim 6 wherein the contact between said blood and said bubbles is countercurrent.
Claim 11
Dependent Claim
159 words
A process for oxygenating blood and simultaneously removing carbon dioxide which comprises placing in a blood oxygenating zone, blood having an excess of carbon dioxide and insufficient oxygen dissolved therein, and a liquid membrane forming solution, said liquid membrane forming solution comprising a fluorinated surfactant, and characterized as being immiscible with said blood and of sufficiently higher density than said blood, whereby said blood and said liquid membrane solution form two cOntinuous immiscible phases, said blood being disposed above said liquid membrane forming solution and in contact with said liquid membrane forming solution, and introducing oxygen bubbles into said liquid membrane forming solution at a rate sufficient to form a foam, said foam being characterized as oxygen bubbles surrounded by liquid membranes, said liquid membranes being permeable to both oxygen and carbon dioxide, whereby said foam rises into said blood and oxygen permeates from said foam into said blood and carbon dioxide permeates from said blood into said foam.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |