The Effects of Hemodilution Methods in Patients Undergoing Primary Debulking Gynaecological Surgery

Acute normovolemic hemodilution (ANH) is a medical procedure that involves removing a certain volume of blood from a patient before surgery and replacing it with a volume expander or blood substitute. The goal of ANH is to reduce the need for blood transfusions during or after surgery. During the ANH procedure, a patient's blood is typically withdrawn and replaced with a crystalloid or colloid solution. This dilutes the patient's blood, reducing the concentration of red blood cells. The withdrawn blood is then stored and can be reinfused back into the patient after the surgical procedure is completed.

The purpose of diluting the blood with fluids and removing some of the red blood cells is to decrease the viscosity of the blood. This can improve blood flow and oxygen delivery to tissues, especially in cases of decreased blood flow or oxygenation.