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==Introduction==

==Introduction==

A vapouriser delivers safe and effective concentrations of anaesthetic vapour and are commonly found on the back bar of an anaesthetic machine. As most inhalation agents are stored as liquids at room temperature, there is a requirement for them to be vapourised before reaching the patient. Safe concentrations are achieved by the stream of fresh gas being split as it reaches the vapouriser causing some of it to pass through the vapouriser chamber containing the saturated vapour, while the remaining gas bypasses this meaning that the vapour is diluted down making it safe for the patient to breathe.  

A vapouriser delivers safe and effective concentrations of anaesthetic vapour and are commonly found on the back bar of an anaesthetic machine. As most inhalation agents are stored as liquids at room temperature, there is a requirement for them to be vapourised before reaching the patient. Safe concentrations are achieved by the stream of fresh gas being split as it reaches the vapouriser causing some of it to pass through the vapouriser chamber containing the saturated vapour, while the remaining gas bypasses this meaning that the vapour is diluted down making it safe for the patient to breathe.