Otsuka Pharmaceutical Factory, Inc.

Motoki Yonekawa

Hiroshi Kamogawa

Eiji Sakashita

Akio Kawamura

Akio Kawakura

Osamu Kaneko

Method of washing secondary filter in process for filtering plasma

In a process for filtering plasma by separating blood into blood cells and plasma by a primary filter and filtering the separated plasma by a secondary filter to remove macromolecules from the plasma as harmful components, the loss of plasma to be discarded from the system by a procedure for eliminating plugging of the secondary filter can be diminished by opening an inner chamber of the secondary filter to the atmosphere to thereby lower the internal pressure of the chamber every time increase of the pressure to an upper limit value due to an increasing plugging tendency of the secondary filter is detected, and washing the interior of the secondary filter from the inner and outer chamber sides after the internal pressure has lowered.

Apparatus for filtering plasma

Process for filtering plasma and regenerating a secondary filter therefor

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Sapporo, Japan

Motoki Yonekawa