Oxalate, 24h, Urine

Alternative Names/Synonyms	n/a
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Urine
Test Code	UOXAT

Clinical Significance (If applicable)

Evaluating risk for kidney stone formation and monitoring therapy for kidney stones.

Specimen Requirements (Sample Type)

Urine

Specimen Requirements (Volume (mL))

5 mL

Specimen Requirements (Tube Type)

24h Urine Collection Container (Acid Preservative)

Collection Requirements

Must be collected in an acidified container (6N HCl).
Collection Instructions

Sample Stability

Room Temperature: N/A

Fridge: 7 days @ 2-8°C

Freezer: 7 days @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas c 502, enzymatic

Test Availability

24 hours a day, 7 days a week

Routine Turnaround Time

5 - 7 days

Reference Ranges

Females: 46 - 368 µmol/day
Males: 92 - 564 µmol/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

Patient Preparation

Avoid excessive amounts of vitamin C rich supplements or food for 48 hours prior to collection.