Casandra
Casandra Test Code QD05867Version 1 (DRAFT)
Performing Lab
Oxalic Acid, 24‑Hour Urine without Creatinine (11318)
Clinical Use
Order TestUse
This quantitative test, performed with a 24‑hour urine specimen, may help screen for hyperoxaluria, determine the cause of kidney stones, and monitor treatment compliance and outcomes.
Special Instructions
Patient should refrain from taking excessive amounts of ascorbic acid or oxalate‑rich foods (e.g., spinach, coffee, tea, chocolate, rhubarb) for at least 48 hours prior to the collection period.
Limitations
Not provided.
Test Details
Methodology
Other
Biomarkers
Oxalic Acid
AnalyteOxalic Acid • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
4-7 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Urine
Volume
10 mL 24‑hour urine
Minimum Volume
2 mL 24‑hour urine
Container
24‑Hour Urine Container
Collection Instructions
Collect urine with 25 mL 6N HCl to maintain a pH below 3. Refrigerate during and after collection.
Patient Preparation
Refrain from excessive ascorbic acid or oxalate‑rich foods for 48 hours prior to collection.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 6 Days |
| Refrigerated | 7 Days |
| Frozen | 4 Months |