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Test Code B2MU Beta-2 Microglobulin (B2M), Random, Urine


Specimen Required


Supplies: Urine Tubes, 5 mL

Container/Tube: Plastic, urine tube

Specimen Volume: 3 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 NaOH as preservative to the collection. This preservative is intended to achieve a pH of between approximately 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, U

Specimen Type

Urine

Specimen Minimum Volume

1 mL

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

Day(s) and Time(s) Performed

Monday through Friday; 5 a.m.-3pm., Saturday; 6 a.m.-3pm

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared or approved by the U.S. 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.