Patent ID: 6629613
Filing Date: 2003-10-07
Classification: A61M,B01D

Abstract:
A leukocyte filter comprising:a prefilter portion; and a multilayered membrane filter portion downstream of the prefilter portion, said membrane filter portion employing at least one generally homogeneous membrane and having a pore size distribution having a median pore size between 5 and 12 microns and having at least 40% of the pore volume being constituted by pores having a pore cross section diameter of between 3 and 10 microns and having at least 5% of the pore volume being constituted by pores having a pore cross section diameter larger than 10 microns, wherein the pore volume of pores having a diameter between 1-30 microns is less than 90% of the total pore volume.