Medical Surgical Labs CBC #1

Question

The diagnosis of iron deficiency anemia correlates with which labs? Select all that apply.

Answers

  1. Hemoglobin 10 g/dL
    • Rationale:

      This answer is correct because the hemoglobin is low. Iron deficiency anemia will show low hemoglobin. A hemoglobin between 8-11 g/dL is risky and must be reported to the HCP. Anything below 7 g/dL is deadly and is a medical emergency.

  2. Hematocrit 30 g/dL
    • Rationale:

      This answer is correct because the hematocrit is low. Iron deficiency anemia will show low hematocrit. Hematocrit levels should be between 36-54 g/dL.

  3. Hemoglobin 14 g/dL
    • Rationale:

      This answer is not correct because the hemoglobin is within normal range. Hemoglobin should be between 12-18 g/dL.

  4. Hematocrit 42 g/dL
    • Rationale:

      This answer is not correct because the hematocrit is within normal range. Hematocrit should be between 36-54 g/dL.

  5. Red blood cells 2 million
    • Rationale:

      This answer is correct because the red blood cells are too low. Red blood cell count should be between 4-6 million. When it is low, it is due to anemia or renal failure.

Overview

Iron deficiency anemia occurs when there is insufficient iron in the blood. Hemoglobin and hematocrit will be low, as well as the red blood cells.

Explanation

Learning Outcomes

Insufficient iron in the blood is a result of iron deficiency anemia. Excessive bleeding is the most common cause. Other causes may include malnutrition and cancer. Normal hemoglobin and hematocrit levels are between 12-18 g/dL and 36-54 g/dL. Normal red blood cell count should be between 4-6 million. Low red blood cell counts are due from anemia or renal failure. Signs of low H & H and RBC include pallor, dusky skin color, cool, and clammy skin, fatigue, and/or weakness.

Test Taking Tip

Think about how anemia is caused, usually bleeding. Blood carries oxygen. So the hemoglobin will be low. If the hemoglobin is low, then the hematocrit will also be low, around 3 times as much. Also, if there is bleeding, there will be loss of red blood cells, so that will be low also.

Video Rationale