| 摘要 |
A delivery device for and method of delivering a metered amount of substance, in particular a delivery device for delivering a metered does of particulate substance to a nasal cavity of a subject. The delivery device comprises a mouthpiece through which a user in use exhales; an outlet through which substance is in use delivered; a housing fluidly connected to the mouthpiece and the outlet, such that exhalation by the user through the mouthpiece creates an air flow through the housing and from the outlet; and a substance-dispensing unit 25 which is disposed within the housing and operative to dispense a metered amount of substance into an entraining air flow as created through the housing. Also disclosed are dispensers which comprise a piston member and membranes which may be ruptured by a rupturing element of the piston. Further disclosed are dispensers comprising and articulated mouthpiece and where a plunger may be used to dispense the substance. |
