Needleless hypodermic injection system, application device and medication cartridge therefor

Abstract

A needleless hypodermic injection system for injecting a liquid medication, which system comprises a disposable cartridge which contains a medication and which comprises a propellant and an igniter, and a reusable application device which comprises a pressure chamber for receiving the medication cartridge, actuation means including an ignition system and means for ensuring reliability and safety of the system. The reusable application device comprises: (a) a housing including a fist housing section and a second housing section which are adapted to be assembled together by a screwing operation, the first housing section comprising a front part having an injection outlet and a chamber adapted to receive a the cartridge contains the medication to be injected and also contains a propellant and an igniter, and (b) means for selectively activating said igniter of said cartridge when predetermined conditions are fulfilled.

Description

PRIORITY TO RELATED APPLICATIONS [0001] This application is a Continuation of Ser. No. 10 / 101,400, filed Mar. 19, 2002 which is pending. This application claims the benefit of U.S. Provisional Application Ser. No. 60 / 278,042, filed Mar. 22, 2001.FIELD OF THE INVENTION [0002] The invention concerns a needleless hypodermic injection system for injecting a liquid medication. [0003] The invention also concerns a reusable application device which is a first part of such a system. [0004] The invention further concerns a disposable medication cartridge which is a second part of such a system. BACKGROUND OF THE INVENTION [0005] Prior art systems and devices of the above mentioned kind have important disadvantages. They have a complex structure and are therefore not easy to assemble and to use, in particular for patients which have some handicaps or are not in full possession of their handling capabilities. Moreover they lack reliable means for preventing accidental release of injections and...

AI Technical Summary

Benefits of technology

[0009] (b) a reusable application device which comprises a pressure chamber for receiving said cartridge, and actuation means including an ignition system and means for ensuring reliability and safety of the system.

[0037] Injections can only be performed when plurality of predetermined necessary conditions for a correct injection are satisfied. Therefore, the risk of accidentally released injections and their negative consequences, e.g. loss of expensive medications and possible injure of user, are substantially reduced.

[0038] A device and a system according to the invention are easy, safe and comfortable to use, so that they can be assembled and used by patients or other persons without any training or special instructions.

Problems solved by technology

They have a complex structure and are therefore not easy to assemble and to use, in particular for patients which have some handicaps or are not in full possession of their handling capabilities.

Moreover they lack reliable means for preventing accidental release of injections and their negative consequences, e.g. loss of expensive medications and possible injures inflicted to the user.

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