Device and process for preparing a treatment fluid by filtration

摘要

The blood processing circuit comprises an extra-corporal circuit (7) and a dialysis liquid circuit. The dialysis circuit includes supply and extraction channels (9a,9b) associated with a filter (21) having first and second chambers (22,23) separated by a filtration membrane (24). The supply channel is connected to a supply (10) of dialysis fluid and linked to the first chamber (22) of the filter. The output channel (9b) has one end connected to the output of the second chamber (23), and one end connected to the input of a compartment (3) in an exchanger (1) with a semi-permeable membrane (4). A loop connection (25) links the output an input of the first chamber (22) of the filter (21). A pump (26) ensures the circulation of fluid through this route, and the cleaning of the membrane (24) by tangential fluid brushing.