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HelpTest Code B2MU Beta-2 Microglobulin, Random, Urine
Specimen Required
Patient Preparation: For 12 hours before specimen collection, do not take multivitamins or dietary supplements containing biotin (vitamin B7) which is commonly found in hair, skin, and nail supplements and multivitamins.
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Container/Tube: Plastic, urine tube
Specimen Volume: 1.0 mL
Collection Instructions:
1. Patient should empty bladder.
2. Have patient drink at least 0.5 liters of water.
3. Within 1 hour, collect a random urine specimen.
4. Add 1 M sodium hydroxide (NaOH) as preservative to the collection. This preservative is intended to achieve an approximate pH of between 6 and 8.
Useful For
Evaluation of renal tubular damage
Monitoring exposure to cadmium and mercury
Method Name
Automated Chemiluminescent Immunometric Assay
Reporting Name
Beta-2 Microglobulin, USpecimen Type
UrineSpecimen Minimum Volume
0.5mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Frozen (preferred) | 14 days | |
| Refrigerated | 48 hours |
Reference Values
≤300 mcg/L
Day(s) Performed
Monday, Wednesday, Friday
Report Available
1 to 3 daysPerforming 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
82232
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| B2MU | Beta-2 Microglobulin, U | 1953-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| B2MU | Beta-2 Microglobulin, U | 1953-9 |
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.