Beta-2-Microglobulin
Label Mnemonic: B2M
Epic Lab Code: LAB49
Downtime Form: A-1a General Laboratory Requisition
Chemistry
6240 RCP
356-3527
Specimen(s):
Plasma
Collection Medium:
Plasma Separator Tube 4.5 mL
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
Adult Minimum: 3 mL whole blood from one light green plasma separator tube (PST) Pediatric Minimum: ONE light green top Microtainer®
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
1.1-2.4 mg/L
Test Limitations:
Icterus: No significant interference up to an I index of 60 corresponding to approximately 60 mg/dL of conjugated and unconjugated bilirubin.

Hemolysis: No significant interference up to an H index of 1000 (approximate hemoglobin concentration: 1000 mg/dL).

Lipemia (Intralipid): No significant interference up to an L index of 1000 (approximate triglycerides concentration: 3000 mg/dL). There is poor correlation between turbidity and triglycerides concentration.
Methodology:
Immunoturbidimetric
CPT Code:
82232