Test Details

Mnemonic

IFAB

Ordering Code

1012500

CPT-4 Code(s)

86340

Specimen Information

Patient Preparation

Very high serum levels of Vitamin B12 may give false positive results for intrinsic factor antibody. No sample should be collected from a patient who has received Vitamin B12 injection therapy within the past week.
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Collect

SST
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Specimen Preparation

Centrifuge, separate serum from cells within 2 hours of collection, and send 1.0 mL serum frozen in a screw-capped plastic vial.
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Alternate Specimen

Serum: Red-top
Plasma: Green sodium lithium, green lithium heparin
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Minimum Volume

0.5 mL
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Transport Temperature

Frozen
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Rejection Criteria

Hemolysis, lipemia, EDTA plasma
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Stability

Room temperature: 8 hours
Refrigerated: 48 hours
Frozen: 28 days
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Methodology

Chemiluminescence
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Reference Range

Negative
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Performing Laboratory

Warde Medical Laboratory
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