| 摘要 |
A pre-filled ampule and a powered, non-invasive injection device assembly wherein the device includes a housing having an ampule-receiving chamber, a gas charge, and means for delivering a predetermined amount of gas to an ampule-receiving chamber. The device includes an injection-counting ring which is received in a groove extending about the housing wherein the ring includes a counting mechanism thereon and is constructed to allow one-way only rotation thereof relative to the housing. The ampule includes an elongate ampule body having a medication holder located at one end thereof, a transfer area located adjacent the other end thereof and a bypass area located adjacent an end of the transfer area. A plunger is provided and has one end thereof received in and closing one end of the medication holder with the other end of the plunger being received in the ampule-receiving chamber of the injection device. A floating seal is received and encloses the other end of the medication holder. Orifice means are provided for forming a skin-piercing injection stream. Attachment means are provided for securing the ampule to the device.
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