Kuhn's endotracheal tube.
Westhorpe
R
R
D000770:Anesthesia, Endotracheal / Q000266:history* / Q000295:instrumentation; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007442:Intubation, Intratracheal / Q000266:history* / Q000295:instrumentation