Final answer:
The mean corpuscle volume (MCV) measurement is the lab test used to differentiate the cause of normocytic/normochromic anemia. It measures the size of red blood cells (RBCs) and can provide valuable insights into the underlying cause of the anemia. Depending on the MCV value, healthcare providers can further investigate conditions such as iron deficiency anemia, thalassemia, vitamin B12 deficiency, or liver disease.
Step-by-step explanation:
The lab test that can help differentiate the cause of normocytic/normochromic anemia is the mean corpuscle volume (MCV) measurement. This test measures the size of red blood cells (RBCs). Normal-sized cells are referred to as normocytic, smaller-than-normal cells are referred to as microcytic, and larger-than-normal cells are referred to as macrocytic. By analyzing the MCV, healthcare providers can gain insights into the underlying cause of the anemia.
For example, if the MCV value is within the normal range, it suggests that the anemia is not due to abnormal cell size, and further investigation is required to determine the cause. On the other hand, if the MCV is lower than normal, it may indicate iron deficiency anemia or thalassemia, while a higher-than-normal MCV value may point to vitamin B12 deficiency or liver disease.
It's important to note that the MCV test is just one component of a thorough diagnostic evaluation, and healthcare providers may perform additional tests to confirm the cause of the anemia.