Adult-Gerontology Clinical Nurse Specialist (CNS) Practice Exam

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For a patient suspected of having iron deficiency anemia, which test would be LEAST likely to be ordered?

  1. CBC with differential or smear

  2. Blood glucose

  3. Ferritin

  4. TIBC

The correct answer is: Blood glucose

The least likely test to be ordered for a patient suspected of having iron deficiency anemia is the blood glucose test. When evaluating iron deficiency anemia, healthcare providers typically focus on specific laboratory tests that assess iron levels and availability in the body. A complete blood count (CBC) with differential or smear is essential because it provides valuable information about the overall blood composition, including hemoglobin levels and indications of anemia. Ferritin is a crucial test that measures stored iron in the body, making it significant for diagnosing iron deficiency. Total iron-binding capacity (TIBC) is another relevant test that evaluates the blood's ability to bind iron with transferrin, which is often elevated in iron deficiency anemia. In contrast, blood glucose testing is primarily used to assess carbohydrate metabolism and diagnose diabetes or monitor blood sugar levels rather than evaluate specific iron-related issues. Therefore, while it is an important test in various clinical scenarios, it does not align with the diagnostic focus on iron deficiency anemia.