Erythrocytosis

Erythrocytosis refers to an elevated red blood cell (erythrocyte) count in the blood. This condition results in an increase in the hematocrit (percentage of blood volume occupied by red blood cells) and hemoglobin levels. It can stem from various causes, including primary bone marrow disorders like polycythemia vera, or secondary factors such as chronic hypoxia (low oxygen levels), dehydration, or certain medications. Diagnosis typically involves a complete blood count (CBC) and additional tests to determine the underlying cause and rule out other conditions.

Erythrocytosis meaning with examples

• A patient living at high altitude showed erythrocytosis, a natural adaptation to the lower oxygen levels. Her body produced more red blood cells to compensate for the decreased oxygen saturation in the atmosphere, increasing her hematocrit and enabling her to function efficiently at altitude.
• Following severe dehydration, the blood test revealed erythrocytosis, causing a doctor to prescribe fluids. The reduced plasma volume made the blood more concentrated, artificially increasing the red blood cell count. Restoring fluid balance would correct the results.
• The diagnosis of erythrocytosis in this patient prompted investigation into the cause of the condition. Further testing excluded lung disease and confirmed a primary polycythemia vera as the source. A treatment plan was subsequently designed to manage the excessive blood cell production.
• A prolonged use of certain performance-enhancing drugs can sometimes induce erythrocytosis. This led to a medical assessment during a regular check-up when the high red blood cell count was detected, which raised concerns of a medication's effect.