Patent ID: 6013182
Filing Date: 2000-01-11
Classification: B01D

Abstract:
A selectively permeable hollow fiber membrane for blood dialysis consisting substantially of a cellulose derivative, which has at least a dense layer on the innermost side and a porous layer of greater void percentage on the outside, which has an ultrafiltration rate (UFR) of at least 50 ml/mmHg.multidot.hr.multidot.m.sup.2 as measured with purified water at 37.degree. C., which has an overall mass transfer coefficient (K.sub.0) for dextran of at least 2.0.times.10.sup.-5 cm/sec when measured using a 0.1 wt % aqueous solution of dextran of molecular weight 10,000 and a sieving coefficient for albumin (SC.sub.Alb) of 0.1 or lower after one hour perfusion of bovine plasma, when the measurement is made with the hollow fiber membrane incorporated into a dialyzer.