Red Blood Cell Morphology (Manual Peripheral Blood Smear Evaluation)

Why Is This Test Done?

Doctors perform a manual RBC smear evaluation to look for signs of abnormal cell shapes, sizes, or counts. This can help detect conditions such as anemia (low RBCs), iron deficiency, or blood disorders like sickle cell disease or thalassemia. It may also be used to evaluate responses to treatments or monitor chronic illnesses.

What to Expect Before the Test

No special preparation is needed. You’ll have a small blood sample drawn from your arm, similar to other blood tests. The sample is then spread thinly on a microscope slide and examined by a trained healthcare professional.

What Happens During the Test?

After your blood is drawn, it is spread evenly on a slide and allowed to dry. A healthcare worker or lab technician carefully examines the cells under a microscope, noting their appearance, including size, shape, color, and any signs of damage or unusual features. This process is done manually, unlike automated tests.

What Are the Possible Results?

Results are qualitative (descriptive) rather than numerical. They may describe normal RBCs, or they may highlight abnormalities such as anisocytosis (variation in size), poikilocytosis (variation in shape), or the presence of abnormal cells like spherocytes or Howell-Jolly bodies. Your doctor will interpret these findings in the context of your overall health.