Phlebotomy is a common treatment for polycythemia vera, a blood disorder characterized by the overproduction of red blood cells. The excess red blood cells can cause blood clots and other complications, so the goal of treatment is to reduce the number of red blood cells in the body.

During phlebotomy for polycythemia vera, a healthcare professional will draw a certain amount of blood from the patient's vein, typically about 500 milliliters, which is equivalent to about one pint. This process is similar to donating blood but is done more frequently and with smaller amounts of blood taken each time.

Phlebotomy is typically performed on a regular basis, usually every few weeks or as needed to maintain a target hematocrit level. Hematocrit is the percentage of red blood cells in the blood, and the target level is typically around 45%.

Phlebotomy can help reduce the risk of complications associated with polycythemia vera, such as blood clots, and can improve symptoms such as headache, dizziness, and shortness of breath. It is important to work closely with a healthcare professional to determine the appropriate frequency and duration of phlebotomy treatment for polycythemia vera.