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HelpTest Code B2MU Beta-2 Microglobulin, Random, Urine
Additional Codes
CNE Order Code: UB2 Microglob
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 |
Reject Due To
| Specimen with pH <6 | Reject |
Reference Values
≤300 mcg/L
Interpretation
Increased excretion is consistent with renal tubular damage.
Beta-2 microglobulin excretion is increased 100 to 1000 times the upper limit of the reference interval in cadmium-exposed workers.
Day(s) Performed
Monday, Wednesday, Friday
Report Available
1 to 3 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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.