Methods and machine based on blood separation by filtration for plasma exchange treatment, plasma donation and cytapheresis such as platelet apheresis

Claim 1

Machine for plasma exchange treatment, plasma donation and cytapheresis, such as platelet apheresis, using filtration as the blood separation principle, comprising a donor tubing to be connected to a donor/patient for the drawing of blood therefrom and subsequent return of blood thereto; separating means for separation of blood by filtration into various components of which plasma is one, wherein said separating means has a reservoir for blood cells; a pump capable of operating in two opposite directions; a first connection between said pump and said donor tubing; a second connection between said pump and said separating means; a third connection between said pump and said reservoir; and a container for liquid; characterized by a fourth connection from said container to said third connection and a control means for admixture of liquid from said container through said fourth connection to flow of blood passing through said third connection.