2018-08-122018-08-121994http://hdl.handle.net/20.500.12091/118Continuous-flow anaesthetic machines (commonly known as Boyle's machines or simply gas machines) are in widespread use. They rely on a supply of compressed medical gas, either from cylinders attached directly to the machine or piped from a large bank of cylinders or liquid oxygen supply elsewhere in the hospital. The two gases most commonly used are oxygen and nitrous oxide.en-USAnesthesiaAnesthesia MachineUMDNS: 45Bottled GassesBook chapter