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HelpTest Code LAB67 Vitamin B12, Serum or Plasma
Reporting Title
Vit B12
Methodology
Roche Diagnostics, Elecsys®/Electrochemiluminescence Immunoassay
Vitamin B12 deficiencies lead to macrocytic and megaloblastic anemia and irreversible central nervous system degeneration.
Performing Laboratory
OhioHealth Laboratory Services-RMH ,GMC, OBH, MH, MGH Core Laboratories
Specimen Requirements
Due to interference, patients receiving high doses of biotin (>5 mg/day) should wait at least 8 hours after dose before having blood drawn.
Collection Instructions:
1. Serum and Plasma gel tubes should be centrifuged and separated within 2 hours of collection.
2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.
Draw blood in a gold-top serum gel tube(s) from a fasting patient (preferred). Spin down and send 1 mL of serum refrigerated.
Note: A speckled-top serum gel tube (s), a plain, red-top tube(s), lithium or sodium heparin are also acceptable.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated | 2 days |
| Ambient | 24 hours | |
| Frozen | >48 hours |
Specimen Transport Temperature
Refrigerate/Ambient OK/Frozen OK
Reference Values
RMH, OBH, MGH, and GMC 232-1245 pg/mL
Day(s) Test Set Up
Monday through Sunday; Continuously
Test Classification and CPT Coding
82607