Fig. 2.

The basic components of the EVLP system. In the closed system, the perfusate is circulated by a centrifugal pump (a), passing through a gas exchange membrane (b) and a leukocyte filter (c), and entering the lung. The gas exchange membrane is connected to a heat exchanger (d) and a gas tank (E) that has a deoxygenating gas mixture of nitrogen (86%), carbon dioxide (8%), and oxygen (6%). The perfusate flows out of the lung and returns to a hard-shell reservoir (f). The minimal perfusate that might leak from the lung is salvaged from a chamber to the reservoir by a roller pump (g). The lung is ventilated with a ventilator (h)