Why do doctors venesection?

To remove excess blood from the body. Bloodletting has been used for centuries to treat a variety of medical conditions, although its use has declined in recent years. However, venesection is still occasionally used today to remove excess blood in certain situations, such as:

- Blood transfusions: If a person has too much blood, either due to a blood transfusion or another condition, venesection may be necessary to remove the excess blood and reduce the risk of complications.

- Polycythemia vera: This is a condition in which the body produces too many red blood cells. This can lead to a number of symptoms, including headaches, dizziness, and fatigue. Venesection can help to reduce the number of red blood cells and improve symptoms.

- Hemochromatosis: This is a condition in which the body absorbs too much iron from food. This can lead to a build-up of iron in the body and damage to various organs. Venesection can help to remove excess iron from the body and reduce the risk of complications.

- Severe head injuries: In some cases, venesection may be used to relieve pressure on the brain after a severe head injury.

To collect blood samples. Blood samples are often needed for diagnostic purposes or to monitor the course of treatment. Venesection is a safe and efficient way to collect blood samples.

To administer medication or IV fluids. In some cases, medication or IV fluids may need to be given directly into the vein. Venesection can be used to access a vein for this purpose.