Final answer:
The total WBC count is counted in thousands per microliter of blood, with normal values from 1,000 to 11,000. Neutrophils, comprising 50-70% of total leukocytes, are the most common white blood cells. A specific ANC test is needed to determine an exact neutrophil count for clinical assessment.
Step-by-step explanation:
The total WBC (White Blood Cell) count is typically measured within a range of approximately 1,000 to 11,000 cells per microliter (µl) of blood. Neutrophils are the most common leukocytes, comprising about 50-70% of the total leukocyte count. Therefore, if a patient has a total WBC count within the normal range, you can estimate the neutrophil count by calculating this percentage. However, to provide an exact neutrophil count, a specific blood test, known as an Absolute Neutrophil Count (ANC), is necessary.
For instance, if a patient has a WBC count of 7,000 cells per µl and neutrophils comprise 60% of this number, the neutrophil count would be approximately 4,200 cells per µl. Calculated as 7,000 cells per µl × 0.60 = 4,200 cells per µl. This range can vary due to factors such as age, sex, and health status. In cases of treatment, like chemotherapy, an ANC of less than 1,500 cells per µl is considered neutropenic, which can potentially postpone or modify treatment due to increased infection risk.