Neutrophil Segment Count in Whole Blood

What Neutrophil Segments Tell Us About Your Health

Neutrophils are a key part of your immune system. This test helps doctors evaluate whether your body is producing enough of these cells to fight infections effectively. Low counts may indicate immune suppression, while high counts can signal inflammation or infection.

When Might You Need This Test?

Your doctor may order this test if you have symptoms like frequent infections, unexplained fevers, or if you’re undergoing treatment that could affect your immune system (e.g., chemotherapy, certain medications). It’s also used to monitor conditions like leukemia or other blood disorders.

How Is This Test Performed?

A small sample of your blood is drawn, typically from a vein in your arm. The sample is then analyzed in a lab to determine the percentage of neutrophils among your white blood cells. This is usually done using automated blood testing technology.

What Do Results Mean?

Results are reported as a percentage of total white blood cells. While exact reference ranges can vary by lab, abnormal results may prompt further testing to investigate underlying causes, such as infections, autoimmune diseases, or blood disorders.