Plasma natrium mmol/l Urine natrium mmol/l Plasma creatinine micromol/l Urine creatinine micromol/l Referentiewaarden FENa <1% prerenaal FENa >1% renaal FENa >4% postrenaal Referenties Espinel et al. Differential diagnosis of acute renal failure. Clin Nephrol 1980 Feb;13(2):73-7.
