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Updated: Jul 28, 2026

Instrumentation of Near-term Fetal Sheep for Multivariate Chronic Non-anesthetized Recordings
Published on: October 25, 2015
Doctor Dee's ether apparatus
G Sudarshan1, A K Soni, B Welsh
1Department of Anaesthesia, Royal Victoria Infirmary, Newcastle Upon Tyne.
Abstract:
In the early 1940s, Dr M. H. Armstrong-Davison devised an apparatus for inhalational anaesthesia. The apparatus was essentially a combination of Water's to-and-fro soda-lime canister and Hewitt's ether inhaler. The description of the apparatus is followed by a brief historical note on Dr Armstrong-Davison.
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