The enema.
Kravetz
R E
RE
Archives Commitee, American College of Gastroenterology, USA.
D004733:Enema / Q000266:history* / Q000295:instrumentation; D049668:History, 15th Century; D049669:History, 16th Century; D049672:History, 19th Century; D049690:History, Ancient; D006801:Humans