What lab values indicate polycythemia?

The characterization of polycythemia is primarily identified through elevated levels of red blood cells (RBCs), hemoglobin, and hematocrit. In this condition, the body produces an excessive amount of red blood cells, often in response to chronic hypoxia or other stimuli, leading to increased hemoglobin levels and a higher hematocrit percentage.

This increased production is a compensatory mechanism aimed at enhancing oxygen delivery to tissues, as seen in conditions like chronic lung disease or residing at high altitudes.

In summary, elevated counts of RBCs, hemoglobin, and hematocrit are key indicators that clearly define polycythemia, supporting the notion that the body is attempting to improve oxygenation.