Hemodialysis Adequacy Using a Heparin-grafted Dialyzer and a Citrate-enriched Dialysate

After providing informed consent, patients will be randomized to either the intervention treatment ("EvoCit procedure") or the control treatment ("EvoHep procedure"). After randomization, each study arm consists of four weeks of 3x4 hours hemodialysis treatments according to the allocated protocol. After the last dialysis treatment of the fourth treatment week and after a long interdialytic interval, patients will crossover to the alternative hemodialysis procedure. After crossover, the study will be completed with, again, four weeks of 3x4 hours hemodialysis treatments according to the allocated protocol.