Partial Exchange blood transfusion is one of those treatments common among patients with Congenital Heart Disease, particularly Tetralogy of Fallot (TOF) with POLYCYTEMIA.
Polycythemia is a condition in which the number of Red blood cell in circulation is higher than normal, PCV can range from 62-80%. A high viscosity predisposes to clot formation and
A patient with Polycytemia requires PET to reduce blood viscosity. PET involves withdrawal of blood from the body through venous access and replacing it with fluid e.g normal saline to cause haemodilution.