Dual-Container Autoinjector for Sterile Lyophilisate Mixing

The patent combines the lyophilisate cartridge and diluent cartridge into a single integrated cartridge assembly where both substances are contained in separate compartments within one cartridge. This merging maintains sterility during transport while reducing device complexity and simplifying handling, as the entire cartridge can be loaded and processed as a single unit rather than managing separate cartridges.

The patent performs preliminary actions by pre-configuring the cartridge with both lyophilisate and diluent in separate compartments, pre-attaching the needle, and pre-setting the injection mechanism. When the cartridge is activated, the diluent is automatically injected into the lyophilisate compartment to reconstitute it, followed by automatic mixing and injection. This eliminates manual reconstitution steps and significantly reduces administration time while maintaining the flexibility to handle different lyophilisate formulations.

The patent implements a self-service mechanism where the cartridge automatically performs the sequence of operations: the diluent is automatically injected into the lyophilisate compartment, the mixture is automatically shaken and mixed, and the reconstituted solution is automatically injected into the patient. This single automatic process maintains precise control over each step while dramatically improving ease of operation, as the user only needs to activate the cartridge rather than perform multiple manual actuation procedures.