Cardiopulmonary bypass
（重定向自Lung machine）
![](/Images/godic/202501/25/Coronary_artery_bypass_surgery_Image_657C-PH1617.jpg")
![Illustration of one typical way that a heart-lung machine may be connected to the veins and arteries near the heart. The three implements on the left represent (from top to bottom) the pump, the oxygenator, and the reservoir.](/Images/godic/202501/25/Blausen_0468_Heart-Lung_Machine1617.png")
![A heart lung machine used in London's Middlesex Hospital in 1958](/Images/godic/202501/25/1955_heart_lung_machine1617.jpg")
![Perfusionist operating a modern heart lung machine](/Images/godic/202501/25/Perfusionist_opearting_heart_lung_machine1617.jpg")
Cardiopulmonary bypass (CPB) is a technique that temporarily takes over the function of the heart and lungs during surgery, maintaining the circulation of blood and the oxygen content of the body. The CPB pump itself is often referred to as a heart–lung machine or "the pump". Cardiopulmonary bypass pumps are operated by perfusionists. CPB is a form of extracorporeal circulation. Extracorporeal membrane oxygenation is generally used for longer-term treatment.