Patent EP0076665A2 successfully refreshed from Google Patents.
EP0076665A2
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EP
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Method and apparatus for plasmapheresis
Assignee: EIDP Inc
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Filing: 1982-10-01
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Granted: —
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Expires: 2002-10-01
Abstract
Abstract Plasmapheresis by filtration can be carried out with high efficiency for long periods by conducting blood over a surface of a membrane and passing plasma at an accelerating rate until the threshold level is attained, maintaining the rate of passing plasma until the ceiling system transmembrane pressure difference is attained and then reducing the passing of plasma and the system transmembrane pressure difference and allowing the membrane to clear before repeating the cycle.
Inventors
- 👤 Joseph Michael Ramstack
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:45
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/14; B01D61/147; A; A61; A61M; A61M1/00; A61M1/34; A61M1/3496; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/279; A61M60/30; A61M60/36; A61M60/37; A61M60/50; A61M60/508; A61M60/562; B01D61/22; B01D65/00; B01D65/08; B01D2321/00; B01D2321/20; B01D2321/2066; B01D2321/2083
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
Process for plasmapheresis by filtration which comprises conducting blood over a surface of a membrane and, in a cyclic manner, (a) passing plasma through the membrane and, when the ceiling system transmembrane pressure difference is attained, (b) reducing the flow of plasma through the membrane and reducing the system transmembrane pressure difference.
Claim 2
Dependent Claim
52 words
Process for plasmapheresis by filtration which comprises conducting blood over a surface of a membrane and, in a cyclic manner, (a) passing plasma through the membrane and, when the ceiling system transmembrane pressure difference is attained, (b) reducing the flow of plasma through the membrane and reducing the system transmembrane pressure difference.
Claim 3
Dependent Claim
15 words
Process of Claim 1 which comprises reducing the system transmembrane pressure difference to about zero.
Claim 4
Dependent Claim
57 words
Process of Claim 1 or Claim 2 which comprises passing plasma at an accelerating rate until the threshold level is attained, and which comprises reducing the rate of acceleration after the threshold level is attained and substantially terminating the passing of plasma and reducing system transmembrane pressure difference to about zero when the ceiling pressure is attained.
Claim 5
Dependent Claim
14 words
Process of Claim 3 which comprises reducing the rate of acceleration to about zero.
Claim 6
Dependent Claim
25 words
Process of any one of Claims 1 to 4 which comprises electronically controlling the passing of plasma in response to the system transmembrane pressure difference.
Claim 7
Dependent Claim
56 words
Apparatus for plasmapheresis by filtration through a membrane which comprises a membrane, means for conducting blood over a surface of the membrane and means for passing plasma through the membrane, and means for reducing the flow of plasma through the membrane and reducing system transmembrane pressure difference when the ceiling system transmembrane pressure difference is attained.
Claim 8
Dependent Claim
56 words
Apparatus for plasmapheresis by filtration through a membrane which comprises a membrane, means for conducting blood over a surface of the membrane and means for passing plasma through the membrane, and means for reducing the flow of plasma through the membrane and reducing system transmembrane pressure difference when the ceiling system transmembrane pressure difference is attained.
Claim 9
Dependent Claim
17 words
Apparatus of Claim 6 which comprises means for reducing the system transmembrane pressure difference to about zero.
Claim 10
Dependent Claim
61 words
Apparatus of Claim 6 or Claim 7 which comprises means for passing plasma at an accelerating rate until the threshold level is attained, and which comprises means for reducing the rate of acceleration after the threshold level is attained and substantially terminating the passing of plasma and reducing system transmembrane pressure difference to about zero when the ceiling pressure is attained.
Claim 11
Dependent Claim
16 words
Apparatus of Claim 8 which comprises means for reducing the rate of acceleration to about zero.
Claim 12
Dependent Claim
28 words
Apparatus of any one of Claims 6 to 9 which comprises an electronic device which controls the passing of plasma in response to the system transmembrane pressure difference.
References Cited (Backward Citations)
No citation records indexed.
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