Test Overview
Enzymatic
Monitoring therapy for kidney stones using 24-hour urine collections. Identifying increased urinary oxalate as a risk factor for stone formation. Diagnosis of primary or secondary hyperoxaluria
0.11-0.46 mmol/24 h
9.7-40.5 mg/24 h
The reference value is for a 24-hour collection. Specimens collected for other than a 24-hour period are reported in unit of mmol/L for which reference values are not established.
Reference values have not been established for patients who are younger than 16 years.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
Specimen Requirements
Patient Preparation: For 24 hours before, as well as during the collection process, patient should not take large doses (>2 g orally/24 hours) of vitamin C.
Collect urine for 24 hours, maintain refrigeration for entire collection. Mix well and aliquot into a plastic vial. Send to Specimen Processing refrigerated.
24 hour urine preserved with Diazolidinyl Urea (Germall) 5.0 mL (Mayo supply item #T822)
4 mL urine
1 mL urine
Additional Information
Test performed by Mayo Clinic Laboratories