Mechanical Circulatory Support for the Heart and Lungs

Heart-lung machine or cardiopulmonary bypass is a technique which is used in open heart surgery ,which takes over the function of heart and lungs during surgery,maintaining the circulation of blood and oxygen content of body.The heart lung machine is often refered to as the pump and does the work of heart and lungs during the operation


Components And Working of Heart-Lung Machine

Heart-Lung Machine which consists of 2 main functional units,the pump and oxygenator,remove oxygen deprived blood from a patients body and replace it with oxygen rich blood. The chamber(pump) receives  blood from the body which is normally the responsibility of heart's right atrium.This blood is then pumped by the machine through an oxygenator,a function normally the responsibility of right ventricle.The oxygenator removes the co2 and adds oxygen,which is normally done by the lungs.The pump then pumps this newly oxygenated blood back to the body,which is normally the works of heart's left side.The heart lung machine is connected to the patient by a series of tubes.At the end of the operation the surgeon gradually allows the patient's heart to resume its normal function and the heart lung machine is "weaned off".

Uses of Heart-Lung Machine

It is commonly used in heart surgery because of difficulty of operating on a beating heart.When the surgery requires opening of chambers of heart,it bec