Three (3) Mayo Screw Cap Transfer Vials, banded together
1. Divide specimen into 3 plastic vials, 1 containing 1.0 mL, 2 containing 1.5 mL each
2. Band specimens together.
Frozen - 14 days
Mayo Clinic Laboratories (ACASM/83632); R-MM
Days Set Up:
Mo - Fr and Sa
1 - 4 days (Vitamin B12)
Vitamin B12: 180 - 914 ng/L
Collection/ Processing Details:
Note: Patient should fast (8 hours) prior to collection.
Diagnosis of pernicious anemia
Diagnosis of vitamin B12 deficiency-associated neuropathy
If B12 <150 ng/L, then Intrinsic Factor Blocking Ab (IFBA) is performed.
If IFBA is negative or indeterminate, then the Gastrin is performed.
If the B12 is 150 - 400ng/L, then the methylmalonic acid (MMA) is performed.
If the MMA is >0.4 µmol/L, then the IFBA is performed.