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| Title | INTRINSIC FACTOR BLOCKING ANTIBODY |
| Specimen Requirement | <p>DRAW BLOOD IN A SST/1.0 mL. SPIN, SEPARATE SERUM FROM CELLS WITHIN 2 HOURS.</p>
<p>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 WITHIN THE PAST WEEK.</p> |
| Methodology | |
| Stability | ROOM TEMP 8 HOURS; REFRIGERATED 48 HOURS |
| Reference Range | BY REPORT |
| Turnaround | 3-5 DAYS pERFORMED SUN, TUES, THURS |
| Clinical Use | <p>Differentiation of pernicious anemia from other megaloblastic anemias. Intrinsic factor blocking autoantibodies are found in approximately 75% of patients with pernicious anemia. High serum concentrations of vitamin B12 (cobalamin) cause false positive results.</p> |
| Test Code | IFA |
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