Henry Edmund Gaskin Boyle

Henry Edmund Gaskin Boyle OBE (2 April 1875 – 15 October 1941) was a pioneering anaesthetist best remembered for the development of early anaesthetic machines.

Born in Barbados, he was the only child of Henry Eudolphus Boyle, estate manager and his wife, Elizabeth, daughter of Benjamin Law Gaskin, a member of the House of Assembly. He moved to England in 1894 after schooling at Harrison College, Bridgetown.

Boyle qualified MRCS LRCP in 1901 from St Bartholomew's Hospital, London. He worked as a junior anaesthetist at Barts and was appointed visiting consultant in 1903. During World War I he worked with the Royal Army Medical Corps in London, publishing over 3600 cases anaesthetised with nitrous oxide-oxygen-ether. His work was recognised with an OBE.

Boyle promoted intratracheal insufflation techniques using nitrous oxide, oxygen and ether, replacing open-drop anaesthesia. Initially he used imported Gwathmey machines from the USA, but finding them unreliable, he developed his own continuous-flow machines. His design included cylinders for the gases and a "Boyle's Bottle" to vaporize diethyl ether. Until recently, an anaesthetic machine was often referred to as a "Boyle's Machine" in honour of his contribution. Dr. Boyle was a left-hander and anaesthetic machines available all over the world were initially designed with controls and switches meant for left hand use until the 1950s when components were revised to suit right hand use.

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