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HelpTest Code B2MU Beta-2 Microglobulin, Random, Urine
Reporting Name
Beta-2 Microglobulin, UUseful For
Evaluation of renal tubular damage
Monitoring exposure to cadmium and mercury
Method Name
Automated Chemiluminescent Immunometric Assay
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineSpecimen Required
Patient Preparation: For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Container/Tube: Plastic, urine tube
Specimen Volume: 1 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 1M sodium hydroxide (NaOH) as preservative to the collection. This preservative is intended to achieve an approximate pH of between 6 and 8.
Reject Due To
| Specimen with pH <6 | Reject |
Specimen Minimum Volume
0.5mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Frozen (preferred) | 14 days |
| Refrigerated | 48 hours |
Reference Values
≤300 mcg/L
Day(s) Performed
Monday, Wednesday, Friday
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 |
Secondary ID
602026Report Available
1 to 3 daysForms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.