| 摘要 |
<p>A leucocyte-separating filter is disclosed, which has a porous membrane having fine pores with substantially an oblong form of 3 to 30 νm in average shorter diameter and a long diameter-to-short diameter ratio (average) of 1.5 or more. Leucocytes contained in a leucocyte suspension are collected without passing through the fine pores since the short diameter of the porous membrane is small enough, whereas since the pores have an oblong form, suspension-passing rate is comparatively great to effectively separate leucocytes. In addition, since matrix of the porous membrane is of a continuous structure, it is stable, and problems of run-off of foreign matters from the porous body or channeling of flow path during the procedure do not substantially arise.</p> |
