History of anaesthesia.
1846 was a good year for patients. While there is debate on exactly who gave the first anaesthetic, there is no doubt that ether was the initial agent used and that the era of painless surgery was born in 1846.
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D000758:Anesthesia / Q000266:history*; D000777:Anesthetics / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century
D000777:Anesthetics