Hematocrit
Hematocrit (Hct) is the percentage of red blood cells (RBCs) in your blood. It helps assess overall blood health and detect conditions like anemia or dehydration. A hematocrit test is commonly included in a complete blood count (CBC).

Importance of Hematocrit?

Red blood cells carry oxygen throughout the body. The hematocrit level reflects how well oxygen is delivered to tissues. Abnormal levels can indicate underlying health conditions, making it an essential marker in diagnosing blood disorders.


Normal Hematocrit Levels?

Hematocrit levels vary based on age, sex, and altitude. General reference ranges include:

  • Men: 38.3% – 48.6%
  • Women: 35.5% – 44.9%
  • Children: 31% – 41%


Causes of High Hematocrit Levels?

A high hematocrit level may indicate:

  • Dehydration – Reduced plasma volume increases RBC concentration
  • Lung disease or smoking – Chronic hypoxia triggers more RBC production
  • Polycythemia vera – A rare blood disorder causing excessive RBC production
  • Living at high altitudes – The body compensates for lower oxygen levels


Causes of Low Hematocrit Levels?

A low hematocrit level may indicate:

  • Anemia – Due to iron deficiency, vitamin B12 deficiency, or chronic disease
  • Blood loss – From surgery, injury, or internal bleeding
  • Bone marrow disorders – Affecting RBC production
  • Overhydration – Dilutes RBC concentration in the blood


When to Seek Medical Advice?

If your hematocrit levels are too high or too low, consult a doctor to determine the cause. Additional tests may be needed to diagnose underlying conditions and recommend appropriate treatment.


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