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Vanderbilt Pathology Laboratory Services

Test Directory



SODIUM 24 HR URINE (NAU)

Department: Chemistry
Test Synonym(s): NAU
CPT Codes: 84300
Methodology: Ion-Selective Electrode Diluted (Indirect)
Reference Range: 0-150 yrs: 40-220 mmol/day
Tube Type: 24 hr urine container - no additive
Specimen: 24 hour urine
Alternate Specimen: 24 hour urine container - Plain, No Additive
Minimum Volume: 15 uL
Stability: 20-25 C: 45 days; 2-8 C: 45 days; -20 C: 1 year
Reasons for Rejection: Improper collection, QNS
Special Instructions: Refrigerate during collection - label with beginning and ending collection times and dates. Indicate total volume if an aliquot is sent. Mix specimen well before aliquoting.

Click here to print the 24 Hour Urine Collection Guide.

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