Sign in →

Test Code RAT10 Citrate/Creatinine Ratio, Urine


Specimen Required


Only orderable as part of a profile. For more information see CITRA / Citrate Excretion, Random, Urine.


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

Reporting Name

Citrate/Creatinine Ratio

Specimen Type

Urine

Specimen 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.

Clinical Information

Urinary citrate is a major inhibitor of kidney stone formation due in part to binding of calcium in urine. Low urine citrate levels are considered a risk for kidney stone formation. Several metabolic disorders are associated with low urine citrate. Any condition that lowers renal tubular pH or intracellular pH may decrease citrate (eg, metabolic acidosis, increased acid ingestion, hypokalemia, or hypomagnesemia).

 

Low urinary citrate is subject to therapy by correcting acidosis, hypokalemia, or hypomagnesemia by altering diet or using drugs such as citrate and potassium.

Reference Values

Only orderable as part of a profile. For more information see CITRA / Citrate Excretion, Random, Urine.

 

No established reference values

Day(s) Performed

Monday through Saturday

Report Available

Same day/1 day

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

Not Applicable

CPT Code Information

82507