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HelpTest Code CITR Citrate Excretion, 24 Hour, Urine
Necessary Information
Patient's age and 24-hour volume (in milliliters) are required.
Specimen Required
Patient Preparation: Any drug that causes alkalemia or acidemia may be expected to alter citrate excretion and should be avoided, if possible. The patient must avoid laxative use for 24 hour collection period.
Supplies:
-Diazolidinyl Urea (Germall) 5.0 mL (T822)
-Sarstedt 5 mL Aliquot Tube (T914)
Container/Tube: Plastic tube
Specimen Volume: 4 mL
Collection Instructions:
1. Add 5 mL of diazolidinyl urea (Germall) as preservative at start of collection or refrigerate specimen during and after collection.
2. Collect urine for 24 hours.
3. Mix well before taking 4-mL aliquot.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Useful For
Diagnosing risk factors for patients with calcium kidney stones
Monitoring results of therapy in patients with calcium stones or renal tubular acidosis
Special Instructions
Method Name
Enzymatic
Reporting Name
Citrate Excretion, 24 Hr, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 14 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Day(s) Performed
Monday through Saturday
Report Available
Same day/1 dayPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
82507
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CITR | Citrate Excretion, 24 Hr, U | 6687-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CITRT | Citrate Excretion, 24 Hr, U | 6687-8 |
| TM51 | Collection Duration | 13362-9 |
| VL49 | Urine Volume | 3167-4 |