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HelpTest Code CRU Chromium, 24 Hour, Urine
Reporting Name
Chromium, 24 Hr, UUseful For
Screening for occupational exposure to chromium
Monitoring metallic prosthetic implant wear
Method Name
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineOrdering Guidance
High concentrations of gadolinium and iodine are known to interfere with most metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Clean, plastic urine container with no metal cap or glued insert
Submission Container/Tube: Plastic, 10-mL urine tube or clean, plastic aliquot container with no metal cap or glued insert
Specimen Volume: 0.5 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. See Metals Analysis Specimen Collection and Transport for complete instructions.
Additional Information:
1. 24-Hour volume is required.
2. See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
An entire 24-hour urine collection is also acceptable.
Additional Information:
1. Starting and ending times of collection are required.
2. Follow instructions in Urine Collection in Specimen Collection and Preparation in General Information.
Specimen Minimum Volume
0.3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 28 days | |
| Ambient | 28 days | ||
| Frozen | 28 days |
Reject Due To
| All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Special Instructions
Reference Values
0-17 years: Not established
≥18 years: 0.1-1.2 mcg/24 hours
Day(s) Performed
Tuesday, Wednesday, Friday
CPT Code Information
82495
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CRU | Chromium, 24 Hr, U | 5624-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8593 | Chromium, 24 Hr, U | 5624-2 |
| TM44 | Collection Duration | 13362-9 |
| VL42 | Urine Volume | 3167-4 |