How-to Calculate the Filtration Fraction (FF) in CKRT FF = Fluid removed from the filter / Fluid entering the filter - The FF is the ratio of fluid being REMOVED from the fluid to the fluid ENTERING the filter - The target FF to reduce the risk of filter clotting is < 20-25% - Dialysate (in CVVHD or CVVHDF) does NOT affect the FF https://nephsim.com/calculators/#Fi #Filtration #Fraction #FF #CKRT #nephrology #calculation