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Intrinsic Factor Blocking Antibody : 568
Test CodeINTRIQ or 568
Alias/See Also
IF Blocking AB, IF Blocking Antibody, Intrinsic Factor AB, Intrinsic Factor Antibody
CPT Codes
86340
Instructions
Samples should not be collected from a patient who has received vitamin B12 injection therapy within the past week.
Serum separator tube or plain red.
Serum separator tube or plain red.
Transport Container
Centrifuge the serum separator tube and transport. If plain red, centrifuge and aliquot 1 mL serum (Min: 0.3 mL) into a standard transport tube.
Transport Temperature
Refrigerated.
Specimen Stability
Ambient: 7 days; Refrigerated: 7 days; Frozen: 28 days
Methodology
Immunoassay
Setup Schedule
Sunday & Tuesday & Thursday
Report Available
1-3 days (From receipt at performing laboratory)
Reference Range
Negative
Clinical Significance
Intrinsic Factor, produced by cells lining the stomach, binds vitamin B12 (cyanocobalamin) to facilitate absorption of the vitamin. Blocking antibody impedes the action of Intrinsic Factor as observed in approximately half of the patients who develop pernicious anemia.
Performing Laboratory
Quest Diagnostics
