An<unk>  (British English) or anesthesia<unk>  (American English) is a medical device used to generate and mix a fresh gas flow of medical gases and inhalational<unk>  agents for the purpose of inducing and maintaining anaesthesia. The<unk>  is commonly used together with a mechanical ventilator, breathing system, suction equipment, and patient monitoring devices; strictly speaking, the term<unk> " refers only to the component which generates the gas flow, but modern<unk> s usually integrate all these devices into one combined freestanding unit, which is colloquially referred to as the<unk> " for the sake of simplicity. In the developed world, the most frequent type in use is the continuous-flow<unk>  or "Boyle's<unk> ", which is designed to provide an accurate supply of medical gases mixed with an accurate concentration of<unk>  vapour, and to deliver this continuously to the patient at a safe pressure and flow. This is distinct from intermittent-flow<unk> s, which provide gas flow only on demand when triggered by the patient's own inspiration. Simpler<unk>  apparatus may be used in special circumstances, such as the triservice<unk>  apparatus, a simplified anaesthesia delivery system invented for the British Defence Medical Services, which is light and portable and may be used for ventilation even when no medical gases are available. This device has unidirectional valves which suck in ambient air, which can be enriched with oxygen from a cylinder, with the help of a set of bellows.
Anaesthetic machine
Air purifier
Liquid ventilator
Hug machine
Jet injector
Anaesthesia associate
Oxygen firebreak
Personal protective equipment