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HelpTest 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.
Useful For
Evaluation of calcium oxalate and calcium phosphate kidney stone risk
Calculation of urinary supersaturation
Evaluation of bone diseases, including osteoporosis and osteomalacia
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| CCTR | Calcium/Creat Ratio, Random, U | No | Yes |
| CALC5 | Calcium, Random, U | No | Yes |
| CRETR | Creatinine, Random, U | No | Yes |
Method Name
CALC5: Photometric
CRETR: Enzymatic Colorimetric Assay
Reporting Name
Calcium/Creat Ratio, Random, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 14 days | |
| Frozen | 30 days | ||
| Ambient | 72 hours |
Reference Values
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 less than 1 month of age.
Reference values have not been established for patients who are greater than 83 years of age.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
82310
82570
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CACR3 | Calcium/Creat Ratio, Random, U | 9321-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CCTR | Calcium/Creat Ratio, Random, U | 9321-1 |
| CALC5 | Calcium, Random, U | 17862-4 |
| CRETR | Creatinine, Random, U | 2161-8 |
Day(s) Performed
Monday through Sunday
Report Available
1 to 3 daysForms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.