Evaluate electrolyte composition of urine, electrolyte balance studies
170 - 250 mEq/24 hours (170-250 mMol/24 hours). Random urine collections are reported in units of mmol/L, for which reference values are not established.
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.