A system and a method for achieving an injectable mixture for medical purposestarting out from at least one first pulverulent component (2) and a second liquidcomponent (13) with a first piston/cylinder arrangement (1) with a cylinder(22) with an axial extension and a piston (20), wherein the cylinder includesa measured amount of the pulverulent component (2), a separate reservoir (12)including a corresponding measured amount of the liquid component (13), andmeans for sealed transfer of said amount of the liquid component to the cylinderfor subsequent mixing and injection of the completed mixture. The first piston/cylinderarrangement is a (first) injection syringe (1). A mixing element (4) being manoeuvrableof a user is positioned inside the cylinder. At least one gas transferring channelmeans leading to the cylinder is arranged at the cylinder. Engagement means (8',18)are arranged for connecting the first injection syringe (1) to the separate reservoir(12) during transfer of the liquid component.
