A 32-year-old woman is evaluated in the clinic for fatigue and pica. Laboratory studies confirm severe iron deficiency anemia with a hemoglobin of g/dL and a ferritin of ng/mL. The physician initiates treatment with daily oral ferrous sulfate. Arrange the following monitoring and treatment evaluation steps in the correct chronological sequence from earliest to latest.
- 1Evaluate the reticulocyte count to detect early bone marrow response
- 2Measure the hemoglobin concentration to confirm correction of anemia
- 3Measure serum ferritin to confirm replenishment of iron stores
- 4Discontinue oral ferrous sulfate therapy
Cevap
The correct sequence is: evaluate reticulocyte count (peaks at 1-2 weeks), measure hemoglobin concentration (normalizes at 4-8 weeks), measure serum ferritin (normalizes 3-6 months after hemoglobin correction), and finally discontinue oral ferrous sulfate therapy.
Following the initiation of oral iron therapy for iron deficiency anemia, the body prioritizes the creation of new red blood cells to address the oxygen-carrying deficit. The very first measurable response is an increase in immature red blood cells (reticulocytes), which peaks at 1 to 2 weeks. Following this reticulocytosis, the overall hemoglobin level slowly rises and typically normalizes within 4 to 8 weeks. Once the functional anemia is completely corrected, continued iron absorption goes toward replenishing the body's depleted iron stores, a process reflected by rising serum ferritin. This repletion phase takes 3 to 6 months of continuous therapy. Therefore, ferritin is measured last to confirm stores are full, after which the iron therapy can be safely discontinued.
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Anahtar Kavram
Chronological sequence of laboratory monitoring and treatment endpoints in iron deficiency anemia