Patent ID: 6423231
Filing Date: 2002-07-23
Classification: A61M,Y10S

Abstract:
In a blood cleansing system, a hemodiafiltration device comprising:a first dialyzer including: a first semi-permeable membrane partitioning said first dialyzer into: a first blood compartment having a first blood inlet which receives blood to be cleaned and a first blood outlet which discharges at least partially diafiltered blood, the blood received within the first blood inlet being in an isosmotic state; and a first dialysate compartment having a first dialysate inlet and a first dialysate outlet; a second dialyzer including: a second semi-permeable membrane partitioning said second dialyzer into: a second blood compartment having a second blood inlet receives the partially diafiltered blood and a second blood outlet which discharges diafiltered blood; a second dialysate compartment having a second dialysate inlet and a second dialysate outlet; and a first dialysate fluid supply which supplies a first non-isosmotic dialysate fluid through a first conduit to the first dialysate inlet of said first dialyzer causing the blood discharged from the first blood outlet to be in a non-isosmotic state, and a second dialysate fluid supply which supplies a second dialysate fluid through a second conduit to the second dialysate inlet of said second dialyzer, the second dialysate fluid having an osmolarity opposite that of the first non-isosmotic dialysate fluid so that the blood being discharged from the second blood outlet is returned substantially to the isosmotic state.