Patent ID: 7291269

Claim:
A device for the extracorporeal treatment of blood comprising: at least one exchanger comprising a semi-permeable membrane dividing said exchanger into a first chamber and a second chamber, at least one first inlet for blood to be treated being in fluid communication with the first chamber of the exchanger, a first fluid outlet being in fluid communication with the first chamber of the exchanger and a second fluid outlet being in fluid communication with the second chamber of the exchanger; an input line for blood to be treated connected to the first inlet of the exchanger; a blood output line connected to the first outlet of the exchanger; at least one treatment unit comprising a semi-permeable membrane dividing the treatment unit into a first chamber and a second chamber, the treatment unit having at least one first fluid inlet in fluid communication with the second chamber of the treatment unit and at least one first fluid outlet in fluid communication with the first chamber of the treatment unit; the second outlet of the exchanger being in fluid communication with the first inlet of the treatment unit; and the first outlet of the treatment unit being in fluid communication with the input line; wherein: the treatment unit includes a second fluid outlet in fluid communication with the second chamber of the treatment unit; and the second outlet of the treatment unit is in fluid communication with a first waste liquid discharge line, the first waste liquid discharge line having a first end and a second end, the first end of said first waste liquid discharge line being connected with the second outlet of the treatment unit and the second end of said first waste liquid discharge line not being connected with any other outlet or inlet of the same treatment unit.