Artificial heart-lung machine in the device of the blood sense has what role?

Artificial heart-lung machine, also known as extracorporeal circulation machine, is a cardiothoracic surgery, especially cardiac surgery will often be used in an important auxiliary medical equipment, which is composed of oxygenators and blood pumps and auxiliary equipment, can carry out extracorporeal circulation of a mechanical device. Simply put, the role of the blood pump is like an artificial heart-lung machine in place of the heart function of the part, its role is to provide the power of the blood flow; and oxygenator is instead of the lungs of the part, its role is to combine oxygen and blood.