The present invention relates to a method and apparatus for delivering medicated fluid or anaesthetic to a patient. An issue, particularly with small patients, is the issue of dead space in an anaesthetic circuit which can lead to hypoxia and difficulty with achieving anaesthesia. An apparatus in accordance with the present invention minimises or eliminates dead space by introducing fresh gas (e.g. containing anaesthetic) proximal to a respiratory opening of the subject's respiratory tract, and inducing a fluid flow to reduce re-breathing of fluid exhausted from the respiratory tract.