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Fetal Hemoglobin
Test Code513
Preferred Specimen
6 mL Lavender Top
Patient Preparation
BLOOD TRANSFUSIONS WITHIN THE LAST 4 MONTHS MAY AFFECT RESULTS
Minimum Volume
1 mL
Instructions
IF CBC IS ALSO ORDERED PLEASE SUBMIT SEPERATE LAVENDER TOP
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable
Refrigerated: 7 days
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis• Clotted
Methodology
Capillary Electrophoresis
Setup Schedule
A.M.
Reference Range
| 0-3 Months | 40.0-85.0 % |
| >3-6 Months | 8.0-40.0 % |
| >6 Months-1 Year | <8.0 % |
| >1 Year | <2.0 % |
Clinical Significance
Fetal hemoglobin is increased in sickle cell anemia, leukemias, beta-thalassemia and hereditary persistence of fetal hemoglobin. The production of fetal hemoglobin may be triggered as a response to sickle crisis.
