How is the absolute neutrophil count (ANC) calculated?

The calculation of the absolute neutrophil count (ANC) is performed by multiplying the total white blood cell (WBC) count by the percentage of neutrophils present in the blood. This method is crucial in clinical settings as it provides a precise measurement of the number of neutrophils available, which are essential for fighting infections.

Neutrophils are a type of white blood cell vital for the body's immune response, and their count can significantly impact the patient's health status, particularly in conditions such as infections, bone marrow disorders, or during chemotherapy. By expressing the ANC in absolute numbers rather than percentages, healthcare providers can more effectively assess a patient's risk of infection or help guide treatment decisions.

The other options presented do not correctly define how ANC is calculated. This precision in understanding and calculating ANC is critical for medical technologists and healthcare professionals involved in patient care, particularly in hematology and oncology settings.