Guided Venous Blood Collection for Complete Blood Count (CBC) with Differential and Platelet Count

What Does the CBC Test Measure?

The CBC includes several key measurements: **Red Blood Cells (RBCs)** – Carry oxygen throughout your body; **Hemoglobin** – The protein in RBCs that carries oxygen; **Hematocrit** – The percentage of blood volume made up of RBCs; **White Blood Cells (WBCs)** – Fight infections and inflammation; **Platelets** – Help with blood clotting; **Differential Count** – Breaks down WBCs into types (e.g., neutrophils, lymphocytes) to assess immune function.

Why Might You Need This Test?

A CBC may be ordered to diagnose or monitor conditions like anemia, infections, blood clotting disorders, or to check for signs of cancer or other systemic diseases. It’s also used before surgeries or during treatments like chemotherapy.

Sample Collection and Preparation

A small amount of blood is drawn from a vein in your arm. The sample is sent to a lab where it’s analyzed to count and identify different blood cells. No special preparation is needed, but avoid eating or drinking for a short time before the test if instructed.

What to Expect After the Test

After the blood draw, you may feel a slight pinch or bruising at the site. Most people recover quickly, but if you experience excessive bleeding or pain, contact your healthcare provider. Results are typically ready within a few days.