Patent ID: 6416487
Filing Date: 2002-07-09
Classification: A61M,B01J,Y10S

Abstract:
A method of removing beta-2 microglobulin from blood, comprising the steps of removing blood from a patient, passing the blood through an adsorbent material with a size and a structure selected so as to remove beta-2 microglobulin from the blood, and re-entering the blood from which the beta-2 microglobulin is removed into the patient, wherein said material is a porous beaded polydivinylbenzene or polystyrene-co-polydivinylbenzene polymer with a surface of beads and of pores modified so as to prevent adsorption of large proteins and platelets and to minimize activation of blood complement system without affecting noticeably accessibility of an inner absorption space of the beads for beta-2 microglobulin and middle-sized toxicant molecules, in which polymer surface exposed vinyl groups are chemically modified so as to form different surface exposed functional groups with a greater hydrophilicity and greater biocompatibility than those of the vinyl groups, so that during contact of blood with the material the beaded polymer provides adsorption of beta-2 microglobulin while the different surface exposed functional groups provide the biocompatibility of the material.