초록 ▼

The power supply is for use with a needleless injector for injecting drug transcutaneously without a needle. The power supply includes an enclosed container that contains a working gas and that can change in volume without an active seal. The enclosed container can include a diaphragm, a bellows, or

The power supply is for use with a needleless injector for injecting drug transcutaneously without a needle. The power supply includes an enclosed container that contains a working gas and that can change in volume without an active seal. The enclosed container can include a diaphragm, a bellows, or other structure that has a movable surface. The enclosed container power supply is a component of a needleless injector which has a latch means to hold the power supply in a loaded state and which has an activation means to release the latch and activate the power supply of the needleless injector to initiate drug delivery. The enclosed container power supply of the needleless injector can interface with a drug reservoir means which contains the drug to be delivered and can interface with a reset means to place the power supply in a loaded state. The drug reservoir means can be a disposable ampule or a reusable ampule. The reset means can be a remote reset mechanism or it can be a component of the needleless injector. The power supply can have two or more stages of volume and pressure change during activation. A two-stage power supply can operate with a larger first stage average pressure and a lower second stage average pressure and with a step change in pressure between stages in order to provide enhanced drug delivery to the patient.

대표청구항 ▼

[ We claim:] [1.]1. A power supply to be used in a drug delivery device for rapidly delivering a drug, said powersupply comprising;A. an enclosed container with an inside space containing a compressed gas and an enclosed container surface that separates said inside space from an outside space at a p

[ We claim:] [1.]1. A power supply to be used in a drug delivery device for rapidly delivering a drug, said powersupply comprising;A. an enclosed container with an inside space containing a compressed gas and an enclosed container surface that separates said inside space from an outside space at a pressure lower than the compressed gas, said enclosed container providing for an expansion of said compressed gas from a first smaller volume to a second larger volume,B. said enclosed container having a portion of said enclosed container surface comprising a movable surface with a movable surface area that undergoes a movement during the expansion of said compressed gas,C. said enclosed container surface having a continuous surface without having an active seal between said inside space and the outside space,D. said movable surface able to be interfaced with a means for containing the drug to cause the drug to be delivered rapidly from the means for containing the drug during the expansion of said compressed gas.