Hypothermia
As the blood passes through the oxygenator, hypothermia machine allows the blood to cool to the required temperature. Generally, the temperature is brought down from 37oC to 28oC allowing the blood cool and then to circulate through the body. Hypothermia reduces the body's demand for oxygen by reducing the metabolic needs of body, specially brain. Local cooling of the heart is further done by infusing the cold cardioplegic solution into the coronary arteries or by using iced lactate locally.