Casandra
Casandra Test Code MC85448Version 1 (DRAFT)
Performing Lab
Ammonium, Random, Urine
Clinical Use
Order TestUse
Measuring urine ammonium aids in diagnosing causes of acidosis using random urine specimens and assists in the diagnosis and treatment of kidney stones by interpreting urinary acid–base handling.
Special Instructions
Not provided.
Limitations
Presence of sulfasalazine, sulfapyridine, or temozolomide may cause false results. Ammonium concentrations may be falsely low in specimens with pH above 8.0 due to contamination or urease‑positive organisms.
Test Details
New York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
Targets not provided.
Result Turnaround Time
0-2 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Urine
Volume
4 mL
Minimum Volume
1 mL
Container
Plastic tube; Sarstedt 5 mL Aliquot Tube (T914)
Collection Instructions
Collect a random urine specimen. No preservative.
Causes for Rejection
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Ambient: 72 hours |
| Refrigerated | Refrigerated (preferred): 14 days |
| Frozen | Frozen: 14 days |