Patent ID: 7387734

Claim:
A method of priming or rinsing back an extracorporeal circuit using a dialysis machine comprising a dialysis liquid preparation system having, a source of water, separate sources of bicarbonate concentrate and sodium chloride concentrate, said extracorporeal circuit comprises an arterial line, connectable to a patient, for drawing blood from the patient, a venous line, connectable to the patient, for returning the blood to the patient, and a blood side compartment of a dialyser, said method comprising the steps of: preparing a saline solution from said source of water and said source of sodium chloride concentrate to obtain a saline solution, wherein bicarbonate is absent from the saline solution; connecting said arterial line to an outlet of the dialysis liquid preparation system of the dialysis machine by means of a coupling during priming; and filling the extracorporeal circuit with said saline solution, wherein said saline solution is conducted from the outlet of the dialysis liquid preparation system of the dialysis machine to the arterial line.