Sodium, 24h Urine

Alternative Names/Synonyms	Na
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Urine
Test Code	NAUM

Clinical Significance (If applicable)

Assisting in the diagnosis and monitoring of electrolyte and/or fluid balance disorders.

Specimen Requirements (Sample Type)

Urine

Specimen Requirements (Volume (mL))

5 mL

Specimen Requirements (Tube Type)

24h Urine Collection Container (No Additive)

Collection Requirements

Collection Instructions

Sample Stability

Freezer: N/A

Room Temperature: 14 days

Fridge: 14 days @ 2-8°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas ISE, indirect selective electrode

Test Availability

24 hours a day, 7 days a week

Routine Turnaround Time

3 hours

Reference Ranges

80 - 220 mmol/day
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688