Filter apparatus for selectively removing leukocytes

摘要

Disclosed is a filter material for selectively removing leukocytes from a leukocyte-containing suspension, which comprises a porous element having an average pore diameter of 1 to 25 mu m and a total pore volume of 0.40 to 0.95 ml/ml of the porous element, and wherein the sum of respective pore volumes of pores of the porous element which have a pore diameter of 1 to 30 mu m is 90% or more, based on said total pore volume. Also disclosed is a filter apparatus for selectively removing leukocyte from a leukocyte-containing suspension which is packed with the above-mentioned filter material. By virtue of the filter material, the filter apparatus not only can remove leukocytes from a leukocyte-containing suspension at a leukocyte removal efficiency as excellent as 10-4 or less in terms of a leukocyte residual ratio without suffering from a pressure loss increase, but also can be rendered compact.