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Vitamin B12
Alternative Names/Synonyms
B12, Cobalamin
Laboratory
Core Laboratory & Transfusion Medicine
Sub-section
Biochemistry
Specimen Type
Blood
Test Code
B12S, B12P
Clinical Significance (If applicable)
Assessing macrocytic anemia, peripheral neuropathy and patients with malabsorptive disorders.
Specimen Requirements (Sample Type)
Serum, Plasma
Specimen Requirements (Volume (mL))
0.5 mL
Specimen Requirements (Tube Type)
Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types
Collection Requirements
Collection Instructions
Storage / Shipment Details
Avoid exposure to light
Sample Stability
Room Temperature
: 2 hours
Fridge
: 2 days @ 2-8°C
Freezer
: 2 months @ -20°C
Cause for Rejection
Specimen Acceptability and Transport Guidance
Instrument, Methodology
Roche cobas e 602, immunoassay
Test Availability
24 hours a day, 7 days a week
STAT Turnaround Time
1 hour
Routine Turnaround Time
3 hours
Reference Ranges
145 - 569 pmol/L
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.
Laboratory Contact Information
416-586-4800 extension 4688
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