Cellular Morphology Examination (Blood Smear Evaluation)

What Is a Blood Smear Used For?

A blood smear is primarily used to diagnose conditions like anemia (low red blood cells), infections (such as malaria or certain bacterial infections), or blood disorders like leukemia or thrombocytopenia. It can also help detect signs of bleeding disorders or unusual cell shapes that may indicate genetic conditions or exposure to certain medications.

How Is the Test Performed?

A small amount of blood is drawn from your arm and spread thinly on a microscope slide. The sample is then stained to highlight different cell types. A healthcare provider examines the slide under a microscope to assess cell morphology.

Sample Preparation and Specimen Requirements

For this test, a simple blood draw is needed. No special preparation is required, but fasting may not be necessary unless instructed by your provider. If you’re taking blood thinners or have a history of clotting issues, your provider may adjust your care plan before testing.

Possible Results and Interpretation

Results are qualitative (descriptive) rather than numerical. Your provider will look for normal cell shapes (e.g., red blood cells with uniform size and color) or signs of abnormalities like fragmented red cells, unusually large or small white cells, or low platelet counts. Abnormal findings may prompt further testing.