Device and method for providing a bone cement paste

A device for providing a bone cement paste from two starting components, comprising

• a mixing unit comprising a hollow cylindrical cartridge with an interior space, wherein a discharge piston axially movable in the interior space is arranged in the interior space, which discharge piston divides the interior space into a proximal part of the interior space and a distal part of the interior space, wherein the proximal part and the distal part of the interior space are connected to one another in a fluid-conducting manner via a conduit means,
• wherein a bone cement powder is stored in the proximal part of the interior space as a first starting component and wherein a conveying piston axially movable in the interior space is arranged in the distal part of the interior space,
• and a reservoir for a monomer liquid serving as a second starting component, which is connected or connectable in a fluid-conducting manner via an inlet channel to the distal part of the interior space for introducing the monomer liquid from the reservoir into the mixing unit,
• wherein
• the reservoir and the mixing unit are connected or connectable in a fluid-conducting manner via an outlet channel, via which a gas is discharged from the interior space into the reservoir.