Patent US5241969A successfully refreshed from Google Patents.
EP0299381A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Membrane-type artificial lung and method of using it
Assignee: DIC Corp
•
Filing: 1988-07-08
•
Granted: —
•
Expires: 2008-07-08
Abstract
Abstract To perform exchange of gases between blood and a gas through a membrane, blood is passed over one side of the membrane and oxygen or an oxygen-containing gas over the other side, said membrane being a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol.
Inventors
- 👤 Takanori Anazawa
- 👤 Kazutaka Murata
- 👤 Hiroyuki Akasu
- 👤 Rishichi Mimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/0025; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/313; B01D69/00; B01D69/02; B01D69/08; B01D71/00; B01D71/06; B01D71/26; B01D71/261; B01D71/262; B01F23/00; B01F23/20; B01F23/23; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23123; B01F23/23124; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; B01D2325/00; B01D2325/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A membrane-type artificial lung adapted to perform exchange of gases between blood and a gas through a membrane by passing blood over one side of the membrane and oxygen or an oxygen-containing gas over the other side, said membrane being a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol.
Claim 2
Dependent Claim
93 words
A membrane-type artificial lung adapted to perform exchange of gases between blood and a gas through a membrane by passing blood over one side of the membrane and oxygen or an oxygen-containing gas over the other side, said membrane being a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol.
Claim 3
Dependent Claim
13 words
The membrane-type artificial lung of claim 1 in which the polyolefin is poly(4-methylpentene-1).
Claim 4
Dependent Claim
29 words
The membrane-type artificial lung of claim 1 in which the hollow fiber membrane had an oxygen flux, Q(O₂), at 25 °C of at least 7 x 10⁻⁶ cm³ (STP)/(cm².sec.cmHg).
Claim 5
Dependent Claim
35 words
The membrane-type artificial lung of claim 1 in which the average thickness of a barrier layer in the membrane, calculated from the oxygen flux Q(O₂) and nitrogen flux Q(N₂), is not more than 10 micrometers.
Claim 6
Dependent Claim
20 words
The membrane-type artificial lung of claim 1 wherein the hollow fiber membrane has a porosity of 10 to 35 %.
Claim 7
Dependent Claim
20 words
The membrane-type artificial lung in which the ethanol flux of the hollow fiber membrane is not more than 30 ml/(min.m²).
Claim 8
Dependent Claim
20 words
The membrane-type artificial lung in which the ethanol flux of the hollow fiber membrane is not more than 30 ml/(min.m²).
Claim 9
Dependent Claim
30 words
The membrane-type artificial lung of claim 1 in which the hollow fiber membrane has an inside diameter of 100 to 300 micrometers and a thickness of 5 to 100 micrometers.
Claim 10
Dependent Claim
30 words
The membrane-type artificial lung of claim 1 in which the hollow fiber membrane is used in the form of an assembly of hollow fibers sparsely aligned lengthwise and tied crosswise.
Claim 11
Independent Claim
96 words
A method of using a membrane-type artificial lung in which the membrane is a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol; which method comprises passing an oxygen-containing gas over the inside of the membrane and blood over its outside, thereby performing exchange of gases between the blood and the oxygen-containing gas.
Claim 12
Independent Claim
96 words
A method of using a membrane-type artificial lung in which the membrane is a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol; which method comprises passing an oxygen-containing gas over the inside of the membrane and blood over its outside, thereby performing exchange of gases between the blood and the oxygen-containing gas.
Claim 13
Independent Claim
96 words
A method of using a membrane-type artificial lung in which the membrane is a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol; which method comprises passing an oxygen-containing gas over the outside of the membrane and blood over its inside, thereby performing exchange of gases between the blood and the oxygen-containing gas.
Claim 14
Independent Claim
96 words
A method of using a membrane-type artificial lung in which the membrane is a hollow fiber membrane which is composed mainly of a polyolefin, has an inside diameter of 10 to 500 micrometers, a thickness of 5 to 100 micrometers, a porosity of 7 to 50 % and an oxygen flux, Q(O₂), of at least 1 x 10⁻⁶ [cm³ (STP)/(cm².sec.cmHg)] and is substantially impermeable to ethanol; which method comprises passing an oxygen-containing gas over the outside of the membrane and blood over its inside, thereby performing exchange of gases between the blood and the oxygen-containing gas.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.