American Association of Critical-Care Nurses (AACN) Certification Practice Test

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What is the normal RDW range in percentage?

  1. 10-12%

  2. 12-14.6%

  3. 14.6-16%

  4. 16-18%

The correct answer is: 12-14.6%

The normal range for Red Cell Distribution Width (RDW) is typically between 12% and 14.6%. RDW is a measure of the variation in the size of red blood cells, and it is an important parameter in evaluating an individual's blood health. A normal RDW indicates that the red blood cells are relatively uniform in size, which is a sign of normal erythropoiesis (the production of red blood cells). Elevated RDW values can indicate various conditions, including types of anemia or other hematological disorders, thus supporting the importance of knowing this normal range for clinical assessment and diagnosis.

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