Patent ID: 8580110

Claim:
A blood treatment apparatus, comprising: a blood treatment unit configured to receive untreated blood and fresh blood treatment fluid, and emit treated blood and used blood treatment fluid, the blood being passed on a blood side of a semi-permeable membrane structure and the blood treatment fluid being passed on a fluid side of said structure, first and second fluid pumps configured to pass blood treatment fluid through the blood treatment unit, and first and second blood pumps configured to extract untreated blood from a blood source, pass extracted blood through the blood treatment unit, and deliver treated blood to a target vessel, wherein the first fluid pump is arranged to pump blood treatment fluid into the first blood pump and the second fluid pump is arranged to pump blood treatment fluid into the second blood pump; a control unit configured to operate the apparatus according to a cyclic process of which during a first phase the untreated blood is extracted from the blood source, and during a second phase the treated blood is delivered to the target vessel, and a flow control device configured to control a trans-membrane flow between the blood side and the fluid side of the blood treatment unit.