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fractional excretion of potassium
Defined as: excreted K+/filtered K+
Indications:
- evaluation of hypokalemia
Procedure:
Measured as:
(urine potassium/serum potassium) / (urine creatinine/serum creatinine)
Clinical significance:
- uncertain
Related
hypokalemia
General
urinary indices
References
Loinc