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Related Experiment Videos

Enumeration of platelets.

A P Abbey, R R Belliveau

    American Journal of Clinical Pathology
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    This study correlates peripheral smear platelet counts with direct methods. A ratio of 1 platelet per oil immersion field suggests a normal platelet range of 7-21 fields.

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    Area of Science:

    • Hematology
    • Clinical Pathology

    Background:

    • Accurate platelet enumeration is crucial for diagnosing and managing various hematological disorders.
    • Direct counting methods provide precise platelet counts, but peripheral smear examination is a common, rapid screening tool.

    Purpose of the Study:

    • To establish a correlation between platelet counts obtained from peripheral blood smears and those from a direct counting method.
    • To define a reliable visual estimation range for platelet counts on peripheral smears.

    Main Methods:

    • Peripheral blood smears were prepared and examined under oil immersion.
    • Platelet counts were performed using a direct chamber counting method.
    • A correlation was established by comparing the number of platelets per oil immersion field with the direct chamber count.

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    Main Results:

    • A ratio of 1 platelet per oil immersion field corresponds to approximately 21,000 platelets per cubic millimeter by direct count.
    • The normal average range of platelets observed per oil immersion field was determined to be 7-21.

    Conclusions:

    • Peripheral smear examination provides a practical method for estimating platelet counts.
    • The established ratio and normal range facilitate rapid and reasonably accurate platelet assessment in clinical practice.