Granulocyte Count in Cerebrospinal Fluid (Manual Count)

Why This Test Is Done

Your doctor may order this test if you have symptoms like severe headaches, neck stiffness, fever, or neurological issues that suggest possible infections (e.g., meningitis), autoimmune diseases, or other conditions affecting the brain or spinal cord. It’s often performed alongside other tests like a lumbar puncture to collect CSF for analysis.

How the Test Works

A small sample of CSF is collected through a procedure called a lumbar puncture (spinal tap). The sample is then examined under a microscope by a trained professional to count the granulocyte cells manually. This method provides detailed information about cell types and their presence in the fluid.

What to Expect Before the Test

You may need to fast for a few hours before the test, depending on your doctor’s instructions. Wear comfortable clothing with loose-fitting bottoms, as you’ll need to bend over slightly during the procedure. Inform your doctor about any medications you’re taking, especially blood thinners, to avoid unnecessary risks.

What to Expect During the Test

The procedure involves inserting a needle into your lower back to collect CSF. You’ll feel a brief pinch, but the process is usually quick. You may experience mild discomfort or pressure, but it’s temporary. Afterward, you’ll rest for a short time to avoid headaches.