The heart-lung machine was invented twice--the first time by Max von Frey.
Zimmer
Heinz-Gerd
HG
Carl-Ludwig-Institute of Physiology, University of Leipzig, Leipzig, Germany. zimmer@medizin.uni-leipzig.de
D006355:Heart-Lung Machine / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans