Machine for cytapheresis such as platelet apheresis, and for plasma exchange treatment having control means (13, 27) for admixture of a liquid to flow of blood passing through a connection (29) between a pump (10) and a separating means (14) for separation of blood by centrifugation into various components....http://www.google.ca/patents/US5147290?utm_source=gb-gplus-sharePatent US5147290 - Method and machine based on the principle of centrifugation for cytapheresis such as platelet apheresis, and for plasma exchange treatment
