Summary from Wikipedia

Sauerbruch was born in Barmen (now a district of Wuppertal), Germany. He studied medicine at the Philipps University of Marburg, the University of Greifswald, the Friedrich Schiller University of Jena, and the University of Leipzig, from the last of which he graduated in 1902. He went to Breslau in 1903, where he developed the Sauerbruch chamber, a pressure chamber for operating on the open thorax, which he demonstrated in 1904. This invention was a breakthrough in thorax medicine and allowed heart and lung operations to take place at greatly reduced risk. As a battlefield surgeon during World ...