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HelpTest Code RAT10 Citrate/Creatinine Ratio, Urine
Reporting Name
Citrate/Creatinine RatioPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Calculating the citrate concentration per creatinine
Diagnosing risk factors for patients with calcium kidney stones
Monitoring results of therapy in patients with calcium stones or renal tubular acidosis
Method Name
Only orderable as part of a profile. For more information see CITRA / Citrate Excretion, Random, Urine.
Calculation
Specimen Required
Only orderable as part of a profile. For more information see CITRA / Citrate Excretion, Random, Urine.
Specimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 14 days | |
| Frozen | 14 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
Only orderable as part of a profile. For more information see CITRA / Citrate Excretion, Random, Urine.
No established reference values
Interpretation
A low citrate value represents a potential risk for kidney stone formation/growth. Patients with low urinary citrate and new or growing stone formation may benefit from adjustments in therapy known to increase urinary citrate excretion.
Very low citrate levels suggest investigation for the possible diagnosis of metabolic acidosis (eg, renal tubular acidosis).
For children ages 5 to 18, a ratio of less than 0.176 mg citrate/ mg creatinine is below the 5% reference range and considered low.(1)
Day(s) Performed
Monday through Saturday
Report Available
Same day/1 dayTest Classification
Not ApplicableCPT Code Information
82507
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| RAT10 | Citrate/Creatinine Ratio | 13722-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| RAT10 | Citrate/Creatinine Ratio | 13722-4 |