Novo Nordisk A/S
AN INJECTION DEVICE WITH A CLEANING RESERVOIR

Abstract:

The invention relates to a medical injection device for injection of a liquid drug. The injection device comprises a housing structure with a cartridge and needle cannula. Further an axially movable cleaning reservoir is provided which is movable in relation to the housing structure, and which cleaning reservoir contains a liquid cleaning agent. The distal tip of the needle cannula is positioned and thus cleaned inside the cleaning reservoir between subsequent injections. According to the invention, the cleaning reservoir connects to an overflow reservoir through a one-way pressure valve such that the cleaning agent and/or air is flowable from the cleaning reservoir and into the overflow reservoir.