— 健康促進與維護 · MEDIUM · MCQ —
護理師正在評估一位病人的營養狀況。下列何種實驗室數值最能指示缺鐵性貧血？
A nurse is assessing a client's nutritional status. Which laboratory value is most indicative of iron-deficiency anemia?
- ALow serum ferritin level✓ 正解低血清鐵蛋白濃度
- BNormal hemoglobin level正常血紅素濃度
- CElevated white blood cell count白血球計數升高
- DHigh platelet count血小板計數升高
— Explanation · 中文詳解 —
缺鐵性貧血（Iron-deficiency anemia）的診斷核心在於體內鐵儲存量的耗竭。血清鐵蛋白（Serum ferritin）是反映體內鐵儲存狀態最準確且最敏感的指標。當鐵蛋白數值降低，表示身體已開始動用儲存的鐵，這是貧血最早期的變化，甚至早於血紅素（Hemoglobin）下降。臨床上評估貧血時，應優先檢視鐵蛋白，而非僅依賴血紅素。
Low serum ferritin is the most indicative laboratory value for iron-deficiency anemia because it reflects depleted iron stores, which is the earliest sign of the condition. Hemoglobin levels may remain normal until iron stores are significantly exhausted, making ferritin a more sensitive and accurate marker for diagnosis.