Peripheral Blood Smear

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The Peripheral Blood Smear is a diagnostic test in which a drop of blood is spread on a glass slide, stained with special dyes (such as Wright or Giemsa stain), and examined under a microscope by a pathologist or hematologist. This test provides detailed information about the number, shape, size, and appearance of red blood cells (RBCs), white blood cells (WBCs), and platelets.

It is a simple but powerful tool that helps detect a wide range of hematological conditions and systemic diseases by visualizing the actual cells in the bloodstream.

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    Description

    Why It’s Done:
    A Peripheral Blood Smear is commonly used to:
    • Diagnose blood disorders such as anemia, leukemia, lymphoma, and myelodysplastic syndromes.
    • Evaluate abnormal findings from a complete blood count (CBC), such as low or high white/red blood cell counts or platelet counts.
    • Identify infections like malaria or other parasitic diseases by visualizing the organism in blood.
    • Detect abnormal cell shapes (e.g., sickle cells, schistocytes, spherocytes) to help diagnose specific types of anemia or other disorders.
    • Monitor the effects of chemotherapy, bone marrow diseases, or certain medications on blood cells.
    • Investigate unexplained symptoms such as fatigue, bruising, fever, or bleeding.

    Preparation:
    • No special preparation is required for the test.
    • Fasting is not needed.
    • A simple blood sample will be collected from a vein, typically from the arm.
    • Inform your doctor of any ongoing medications, recent infections, or chronic illnesses that may affect blood cell counts or morphology.