Citrate Excretion, Random, Urine
Use
Diagnosing risk factors for patients with calcium kidney stones using random urine specimens. Monitoring results of therapy in patients with calcium stones or renal tubular acidosis.
Special Instructions
The test is a profile including three components (Citrate Concentration, Random, U; Creatinine, Random, U; Citrate/Creatinine Ratio) all performed together under the single Test ID CITRA; forms: Renal Diagnostics Test Request (T830) required if not ordering electronically.
Limitations
Patient preparation: any drug that causes alkalemia or acidemia may alter citrate excretion and should be avoided. No preservative is used. Random collections normalized to urinary creatinine may be of some clinical use when a 24‑hour collection cannot be obtained, typically in small children.
New York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 13722-4
- 2161-8
- 2128-7
- 13722-4
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
4 mL
Minimum Volume
1 mL
Container
Plastic, 5‑mL tube
Collection Instructions
Collect a random urine specimen. No preservative.
Patient Preparation
Any drug that causes alkalemia or acidemia may be expected to alter citrate excretion and should be avoided; the patient must avoid laxative use for 24 hours prior to collection.
Causes for Rejection
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 14 days |