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HelpTest ID CRCRU Chromium/Creatinine Ratio, Random, Urine
Ordering 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.
Secondary ID
607758Useful For
Detecting chromium exposure
Special Instructions
Specimen Type
UrineSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 28 days |
| Frozen | 28 days | |
| Ambient | 14 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference 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.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82495
82570
Day(s) Performed
Monday