Test Overview
Potentiometric (ISE)
Renal function, electrolyte balance studies
43 - 217 mEq/24 hrs (43-217 mMol/24 hrs). Random urine collections are reported in units of mmol/L, for which reference values are not established.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
8 hours
- Na, Urine
Specimen Requirements
Collect 24 hour urine specimen with no preservative. Aliquot 5 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.
Specimens collected with glacial acetic acid or HCl preservative are acceptable. If collected in container with acid preservative, indicate on container and requisition: "Collected in Acid".
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.