A medical assistant is labeling a blood sample for anemia. Which of the following tests should the assistant label on the requisition form?

Labeling a blood sample for anemia involves indicating the specific tests that will help in diagnosing the condition. The STAT-CRIT hematocrit test is critical because it specifically measures the proportion of red blood cells in a sample, which is an important factor in diagnosing various types of anemia. A low hematocrit level can suggest that a patient has anemia, providing valuable information about the patient's oxygen-carrying capacity.

In contrast, while a Complete Blood Count (CBC) is also essential for assessing anemia, it encompasses a broader range of measurements beyond just hematocrit levels, including hemoglobin concentration and red blood cell count. The iron level test focuses on iron deficiency but may not adequately represent other potential causes of anemia. The Basic Metabolic Panel (BMP) is unrelated to anemia as it assesses electrolyte and metabolic status rather than blood components. Thus, labeling the requisition with the STAT-CRIT hematocrit directly targets the anemia diagnosis with a specific and relevant test.