| 摘要 |
A syringe, of the kind in which a dose of the drug is entrained by a fluid flow for delivery, is characterised by an upstream portion which provides, or is arranged to provide, a source of fluid under pressure; a downstream nozzle portion; between the upstream and downstream portions an intermediate portion having two relatively sliding parts (34,35) providing therebetween a closed pocket (40) containing the dose; and an actuator mechanism (16,18,21) for initiating a flow of the fluid from the source whereupon the pressure of the fluid applies to one of the slidable parts a force causing the one part to slide relatively to the other part and to open the pocket thereby exposing the dose for entrainment by the fluid as it flows through the intermediate portion and to and through the nozzle. <IMAGE> |
