Device assembly for the infusion of medical solutions

A medical solution infusion device assembly, comprising an infusion device and a housing containing the infusion device, the infusion device comprising an elastomeric pump having a closed end and an open end, a cannula and a filling valve configured to fill the elastomeric pump with a medical solution, wherein the housing of the infusion device comprises a first half-shell and a second half-shell, configured to be sealingly coupled to each other, the first half-shell and the second half-shell being further configured to be sealingly coupled to the infusion device in a position adjacent to the open end of the elastomeric pump;

• wherein the cannula comprises a first tubular portion, a second tubular portion, and a fitting protruding perpendicularly at the second tubular portion, the first tubular portion having a smaller diameter than a diameter of the second tubular portion, so that a shoulder is placed at a junction of the first tubular portion and the second tubular portion, wherein each of the first half-shell and the second half-shell are formed by a first shell portion and a second shell portion of smaller width than a width of the first shell portion, and each of the first and second half-shells comprise an inner surface, an outer surface, and a first edge which connects the first shell portion and the second shell portion, said first shell portion being configured to accommodate the elastomeric pump, wherein said second shell portion is configured to house a set comprising the open end of the elastomeric pump, the second tubular portion of the cannula with the fitting, and the filling valve.