A compact dialysis unit having a dialysis membrane forming a partition between a liquid to be dialyzed and a dialysate, at least that surface of the membrane facing the liquid to be dialyzed having a selectively chemically active therapeutic substance fixed thereon and a selectively acting adsorbent...http://www.google.ca/patents/US4192748?utm_source=gb-gplus-sharePatent US4192748 - Dialysis apparatus with selective chemical activity
