Hemodialysis systems

摘要

A dialysis system (500) is described. The system comprises: an extracorporeal circuit (50) that includes a dialyzer (20, 30), an arterial line (44a), a venous line (44b) and a blood pump (48); and a dialysis fluid flow path (60) that includes a first balance chamber (340a), a second balance chamber (340b), a fresh dialysis fluid pump (370) and a spent dialysis fluid pump (390). The fresh dialysis fluid pump (370) is in fluid communication with first and second fresh compartments (344a, 344b) of the first and second balance chambers (340a, 340b), respectively. The first and second fresh compartments (344a, 344b) are in fluid communication with a fresh dialysate fluid inlet of the dialyzer (20, 30). The spent dialysis fluid pump (390) is in fluid communication with first and second spent compartments (342a, 342b) of the first and second balance chambers (340a, 340b), respectively. The spent dialysis fluid pump (390) is also in fluid communication with a spent dialysis fluid outlet of the dialyzer (20, 30). The system is configured to run a priming sequence that uses at least one of the fresh and spent dialysis fluid pumps to pump dialysis fluid through the dialyzer and into the extracorporeal circuit.