A procedure to circulate and oxygenate the blood while surgery is performed on the heart. It involves the diversion of blood from the heart and lungs through a heart-lung machine and the return of oxygenated blood to the aorta.心肺分流术：给心脏施行手术的同时使血液循环并给血液充氧的一种手段，包括使从心肺流出的血液通过人工心肺机发生转向及使含氧血液流回主动脉