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Mayo Clinic Laboratories

Test Code LAB12631 Beta-2 Microglobulin - Random Urine

Department

CHEMISTRY

Collection Requirements

Urine: First void the urinary bladder, then drink a large glass of water and collect a urine sample within 1 hour.

Primary Collection Container

Yellow Urine Vacutainer (No Additive)

Transport

Urine Frozen

Preferred Transport Temperature

Frozen

Processing

Outpatient: Pour off Aliquot and Freeze Immediately.

InPatient: Send to lab Immediately after collection.

IN LAB Processing:
If urine arrives Refrigerated - Adjust the pH immediately (with 1N NaOH) between 7-9 pH.

If urine arrives Frozen - Deliver to Chemsitry department. Thaw and run Immediately.

Stability

Room Temp: 5 days
Refrigerated: 14 days
Frozen: 3 months

Minimum Testing Volume

1.0 mL

Reference Range

<0.2 mg/L

Methodology

Roche c503 Immunoturbidimetric assay

Performed

Sunday – Saturday

Reported

2-3 days

CPT Codes

82232

Additional Information

Beta-2 Microglobumin is unstable in acidic urine.