| Test Name: |
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Beta 2-microglobulin
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| Test Code(s): |
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B2M / XB2MS
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| CPT Code(s): |
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82232
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| Methodology: |
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Nephelometry
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| Request Form: |
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UWHC Laboratory Request Form (UWH 1289220, 4004202); Write in test if not on form.
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour.
Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Container: |
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Preferred: Green cap with yellow ring (PST)
Also Acceptable:
Green top,
Red cap with yellow ring (SST),
Red top
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| Collection Volume: |
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Preferred: 1 mL
Pediatrics: 1 mL
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| Sample Analyzed: |
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Plasma or serum
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| Volume Required: |
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Preferred: 0.5 mL
Pediatrics: 0.3 mL
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| Specimen Processing: |
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Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Refrigerated: 8 days at 2-8°C
Frozen: 6 months at -20°C
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Interpretation
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Reference Interval:
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| Male |
mg/L |
| 0 day - 30 days |
1.6 - 5.1 |
| 1 month - 6 months |
1.4 - 3.6 |
| 7 months - 11 months |
0.9 - 3.4 |
| 12 months - 3 years |
0.7 - 2.6 |
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4 years - 6 years
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0.6 - 2.6 |
| 7 years - 17 years |
0.7 - 2.3 |
| 18 years and up |
1.3 - 2.8 |
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| Female |
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| 0 day - 30 days |
1.7 - 4.8 |
| 1 month - 6 months |
1.0 - 4.1 |
| 7 months - 11 months |
1.0 - 2.6 |
| 12 months - 3 years |
0.7 - 2.6 |
| 4 years - 6 years |
0.6 - 2.6 |
| 7 years - 17 years |
0.7 - 2.3 |
| 18 years and up |
1.3 - 2.8 |
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