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A nurse cares for a client with megaloblastic anemia who had a total gastrectomy three years ago. What statement will the nurse include in the client's teaching regarding the condition?
A. "The condition is likely caused by a folate deficiency."
B. "The condition is likely caused by a vitamin B12 deficiency."
C. "The condition causes abnormally rigid red blood cells."
D. "The condition causes abnormally small red blood cells."

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Answer:

The correct answer is B

Explanation:

Vitamin B12 requires intrinsic factor to be absorbed. This factor is secreted by parietal cells of the gastric mucosa. So it is common that patients who have had a gastrectomy develop this type of anemia.

Also Vitamin B12 is key to maturation of erythrocytes (red blood cells) and its deficiency leads to abnormal shapes (particularly more rounded erythrocytes). So options C and D can be rule out.

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