Which of the following is the best test to distinguish iron deficiency anemia from ACI?
a. Serum iron
b. Hemoglobin
c. Free erythrocyte protoporphyrin (FEP)
d. Ferritin
ANS: D
Of the tests listed, only ferritin distinguishes between iron deficiency anemia and ACI; in iron deficiency anemia, it is low, whereas in ACI it is normal to elevated. Serum iron and hemoglobin (if the patient is anemic) are decreased in both; FEP is increased in both.
Health Professions
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