Complete Blood Count (CBC) with Differential and Platelet Count

What Does a CBC Measure?

A CBC typically includes: - **Red Blood Cells (RBCs):** Carry oxygen to your body’s tissues. - **Hemoglobin (Hb):** The protein in RBCs that carries oxygen. - **Hematocrit (Hct):** The percentage of blood volume made up of RBCs. - **White Blood Cells (WBCs):** Fight infections and inflammation. - **Platelets (PLT):** Help your blood clot to prevent excessive bleeding. - **Differential Count:** Breaks down WBCs into types (neutrophils, lymphocytes, etc.) to assess immune function. - **Mean Corpuscular Volume (MCV):** Average size of RBCs, which can indicate anemia types.

Why Might Your Doctor Order a CBC?

Doctors may recommend a CBC to: - Check for infections (e.g., high WBC counts). - Detect anemia (low RBCs, Hb, or Hct). - Evaluate bleeding disorders (low platelets). - Monitor chronic conditions like kidney disease or cancer. - Assess blood loss or blood cell production issues.

What to Expect Before or After the Test

No special preparation is usually needed, but you may fast for 8–12 hours before if your doctor specifies. A simple blood draw from a vein (often in your arm) is all it takes. The process is quick and painless, though you might feel a slight pinch. Results are ready within a few days.

Common Results and Their Meanings

Low or high values in any component can signal problems, but exact meanings depend on your symptoms and overall health. For example: - **Low RBCs/Hb/Hct:** Could mean anemia (e.g., from iron deficiency or chronic disease). - **High WBCs:** Might indicate infection or inflammation. - **Low platelets:** Could raise concerns about bleeding risks.