Fractional Excretion of Potassium

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the fractional excretion of potassium that is computed based upon the concentrations of potassium and creatinine in both blood and urine.

**Synonyms:** - FEK - FEK - Fractional Excretion of K - Fractional Potassium Excretion - Fractional Potassium Excretion