What common laboratory test is used to evaluate red blood cell count?

The Complete Blood Count (CBC) is a fundamental laboratory test that provides comprehensive information about the various components of blood, including red blood cells (RBCs), white blood cells (WBCs), and platelets. Specifically, the CBC assesses the quantity and quality of red blood cells, measuring parameters such as hemoglobin concentration, hematocrit levels, and the total number of red blood cells. This test is crucial in diagnosing and monitoring conditions like anemia, infection, and other hematological disorders.

In contrast, a bone marrow biopsy is primarily used to examine the bone marrow for diseases such as leukemia or lymphoma and is not a routine test for evaluating red blood cell count. A coagulation panel focuses on assessing the blood's clotting ability, while a blood glucose test measures the level of glucose in the blood and does not provide information on red blood cell counts. Thus, the CBC is the appropriate and standard test used to evaluate the red blood cell count.