Test Directory

3301 Sodium, Random Urine

Specimen Type
Specimen Stability
Reference Range
Random Urine
7 Days 2 - 8°C
20-110 mmol/L

Specimen Requirements

Specimen Type: Random Urine
Container: Sterile Container
Temperature: Refrigerated


Ion-Selective Electrode (ISE)



Turn-Around Time



5 ml random urine in sterile urine container

Clinical Utility

The excretion of sodium varies with dietary intake. There is a diurnal variation of sodium excretion with excretion being greater during daytime than during the night. Decreased levels are seen in congestive heart failure, excessive sweating, diarrhea, pyloric obstruction, malabsorption and primary aldosteronism. Increased levels may be due to increased salt intake, failure of the adrenal glands, diabetic acidosis, salt losing renal disease, diuretic therapy and water deprivation dehydration.

CPT Codes


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