Antithrombogenic hollow fiber membranes and filters
First Claim
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1. A hollow fiber membrane, said hollow fiber membrane comprising a base polymer admixed with from 0.005% to 10% (w/w) of a surface modifying macromolecule, wherein said base polymer is a polysulfone or a polyacrylonitrile and wherein said surface modifying macromolecule has a structure according to:
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(a1) formula (VII);
FT-[B-(Oligo)]n-B-FT
(VII),wherein Oligo is a soft oligomeric segment including polypropylene oxide or polytetramethylene oxide and having a theoretical molecular weight of from 500 to 3,000 Daltons;
B is a hard segment formed from hexamethylene diisocyanate;
FT is a polyfluoroorgano group; and
n is an integer from 1 to 10;
(a2) formula (VIII);
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Abstract
The invention relates to extracorporeal blood circuits, and components thereof (e.g., hollow fiber membranes, potted bundles, and blood tubing), including 0.005% to 10% (w/w) surface modifying macromolecule. The extracorporeal blood circuits have an antithrombogenic surface and can be used in hemofiltration, hemodialysis, hemodiafiltration, hemoconcentration, blood oxygenation, and related uses.
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22 Claims
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1. A hollow fiber membrane, said hollow fiber membrane comprising a base polymer admixed with from 0.005% to 10% (w/w) of a surface modifying macromolecule, wherein said base polymer is a polysulfone or a polyacrylonitrile and wherein said surface modifying macromolecule has a structure according to:
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(a1) formula (VII);
FT-[B-(Oligo)]n-B-FT
(VII),wherein Oligo is a soft oligomeric segment including polypropylene oxide or polytetramethylene oxide and having a theoretical molecular weight of from 500 to 3,000 Daltons;
B is a hard segment formed from hexamethylene diisocyanate;
FT is a polyfluoroorgano group; and
n is an integer from 1 to 10;(a2) formula (VIII); - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification