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Test Directory




Expected Turnaround

24 hours

Sodium is the major extracellular cation and functions to maintain fluid distribution and osmotic pressure. Some causes of decreased levels of sodium include prolonged vomiting or diarrhea, diminished reabsorption in the kidney and excessive fluid retention. Common causes of increased sodium include excessive fluid loss, high salt intake and increased kidney reabsorption.


Ion-selective electrode (ISE); enzymatic


Hemolysis and gross lipemia, urine with additives

Room Temperature: 14 days Refrigerated: 14 days


Serum, gel separator, SST, 24 hour Urine (no additives)

1 ML

0 - 999



136 mmol/L - 145 mmol/L

<121 mmol/L
>159 mmol/L

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