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

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What normal range is classified for MCHC, which indicates the color of red blood cells?

  1. 28-32%

  2. 32-36%

  3. 36-40%

  4. 30-34%

The correct answer is: 32-36%

Mean Corpuscular Hemoglobin Concentration (MCHC) is a measure that indicates the concentration of hemoglobin in a given volume of packed red blood cells, effectively reflecting the color of the red blood cells. A normal MCHC range is typically between 32% and 36%. This range is significant because it helps determine whether red blood cells are normochromic (normal color), hypochromic (paler than normal, often due to iron deficiency), or hyperchromic (darker than normal, indicating potential spherocytosis or other abnormalities). In clinical practice, an MCHC within the normal range suggests that the red blood cells contain a healthy amount of hemoglobin, indicating adequate oxygen-carrying capacity. The other ranges provided do not accurately reflect the established normal values for MCHC, which is why they would not be considered correct. Thus, the answer correctly identifies the normal MCHC range as 32-36%.

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