Patent ID: 6280632
Filing Date: 2001-08-28
Classification: A61M

Abstract:
Apparatus for providing a sterile substitution solution from a dialysis fluid used in connection with the treatment of a patient's blood, said apparatus comprising an extracorporeal circuit for handling said patient's blood, said extracorporeal circuit including blood treatment apparatus for treating said patient's blood with fresh dialysis fluid and for providing a spent dialysis fluid therefrom, balancing means for comparing a flow of said fresh dialysis fluid prior to said treatment of said patient's blood and flow of said spent dialysis fluid after said treatment of said patient's blood, a fresh dialysis circuit for handling said fresh dialysis fluid prior to said blood treatment apparatus, a throttle dividing said fresh dialysis circuit into a positive pressure portion and a negative pressure portion, at least one sterile filter including a membrane in said fresh dialysis circuit, whereby said at least one sterile filter is not in contact with said patient's blood, said at least one sterile filter being disposed in said positive pressure portion of said fresh dialysis circuit, and pressure control means for controlling the pressure in said positive pressure portion in order to pass a predetermined amount of said fresh dialysis fluid through said membrane in said at least one sterile filter in order to provide a predetermined amount of said sterile substitution solution for addition to said extracorporeal circuit.