Description

Hematocrit Overview:

Hematocrit (Hct) is a blood test that measures the proportion of blood volume occupied by red blood cells (RBCs). It is an essential component of a complete blood count (CBC) and is used to assess an individual’s overall health and detect various medical conditions.

Key Points:

  • Normal Range:
    • Men: Approximately 38.3% to 48.6%
    • Women: Approximately 35.5% to 44.9%
    • Values can vary based on age, sex, and altitude.
  • Clinical Significance:
    • High Hematocrit: May indicate dehydration, polycythemia vera, or lung diseases that lead to chronic low oxygen levels.
    • Low Hematocrit: Can be a sign of anemia, blood loss, bone marrow disorders, or nutritional deficiencies (e.g., iron, vitamin B12, folate).
  • Measurement:
    • Hematocrit is typically determined by centrifuging a blood sample in a capillary tube, allowing the separation of blood components. The height of the RBC layer is measured and expressed as a percentage of the total blood volume.

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