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Test ID CACR3 Calcium/Creatinine Ratio, Random, Urine


Specimen Required


Supplies: Sarstedt Aliquot Tube 5 mL (T914)

Collection Container/Tube: Clean, plastic urine container with no metal cap or glued insert

Submission Container/Tube: Plastic, 5-mL tube or a clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 4 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


Secondary ID

610594

Useful For

Evaluation of calcium oxalate and calcium phosphate kidney stone risk

 

Calculation of urinary supersaturation

 

Evaluation of bone diseases, including osteoporosis and osteomalacia

Specimen Type

Urine

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  72 hours

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

CALCIUM/CREATININE:

1 month-<12 months: 0.03-0.81 mg/mg creatinine

12 months-<24 months: 0.03-0.56 mg/mg creatinine

24 months-<3 years: 0.02-0.50 mg/mg creatinine

3 years-<5 years: 0.02-0.41 mg/mg creatinine

5 years-<7 years: 0.01-0.30 mg/mg creatinine

7 years-<10 years: 0.01-0.25 mg/mg creatinine

10 years-<18 years: 0.01-0.24 mg/mg creatinine

18 years-83 years: 0.05-0.27 mg/mg creatinine

 

Reference values have not been established for patients who are younger than 1 month.

Reference values have not been established for patients who are older than 83 years.

 

CREATININE:

≥18 years old: 16-326 mg/dL

Reference values have not been established for patients who are younger than 18 years.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

82310

82570

Day(s) Performed

Monday through Sunday

Report Available

1 to 3 days

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.