Urinary sodium and potassium together provide important information about how kidneys handle electrolytes and about underlying causes of abnormal blood values. Patterns help distinguish between primary kidney problems, hormonal disorders (such as hyperaldosteronism), volume depletion, and other causes of electrolyte disturbances.
This test is used in evaluation of unexplained hypokalemia or hyponatremia, suspected hyperaldosteronism, certain hormonal disorders, and chronic diuretic use. It is typically interpreted alongside serum electrolytes and clinical findings. Sample type is a random urine specimen or 24-hour collection.
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