How-to Calculate the Filtration Fraction (FF) in CKRT

 • The FF is the ratio of fluid being REMOVED from the filter 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



FF = Fluid removed from the filter / Fluid entering the filter

     = Ultrafiltration (ml/hr) / (Pre-Filter RF+ Plasma Flow Rate (ml/hr))



Calculator Here: https://nephsim.com/calculators/



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