Specialized hollow fiber membranes for in-vivo plasmapheresis and ultrafiltration
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United States of America Patent
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Oct 12, 2004
Issued Date -
N/A
app pub date -
Sep 17, 2003
filing date -
Apr 13, 2000
priority date (Note) -
Expired
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Abstract
An in-vivo plasmapheresis and/or in-vivo ultrafiltration membrane comprises a plurality of elongated hollow fibers each fiber having an interior lumen extending along the fiber length, the fiber wall having a plurality of zones between the inner and outer wall surfaces, each of the zones having a mass density different than the mass density of an adjacent zone. The fiber wall is characterized by having a lower mass density zone at the inner wall surface and a higher mass density zone at the outer wall surface.
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