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HelpTest Code CRCRUM Chromium/Creatinine Ratio, Random, Urine
Additional Codes
| Mayo | CRCRU |
| Epic ID | LAB3314 |
Special Instructions
Specimen Type
UrineOrdering Guidance
Specimen Required
Patient Preparation: High concentrations of gadolinium and iodine are known to potentially interfere with most inductively coupled plasma mass spectrometry-based metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Clean, plastic urine container with no metal cap or glued insert
Submission Container/Tube: Plastic vial or clean, plastic aliquot container with no metal cap or glued insert
Specimen Volume: 3 mL
Collection Instructions:
1. Collect a random urine specimen.
2. See Metals Analysis Specimen Collection and Transport for complete instructions.
Specimen Minimum Volume
2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 14 days |
Transport refrigerated.
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Performing Laboratory
Mayo Clinic Laboratories in Rochester
Method Name
CRCRR: Triple-Quadrupole Inductively Coupled Plasma Mass Spectrometry (ICP-MS/MS)
CRETR: Enzymatic Colorimetric Assay
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| CRCRR | Chromium/Creat Ratio, U | No | Yes |
| CRETR | Creatinine, Random, U | No | Yes |
Useful For
Detecting chromium exposure
Day(s) Performed
Monday
Report Available
2 to 8 daysReference Values
CHROMIUM/CREATININE RATIO
0-17 years: Not established
>17 years: <0.8 mcg/g Creatinine
CREATININE, RANDOM
≥18 years old: 16-326 mg/dL
Reference values have not been established for patients who are younger than 18 years of age.
CPT Code Information
82495
82570