Patent ID: 8551761

Claim:
A cartridge for analyzing biological samples, comprising: a reaction chamber and a biochip mounted in the reaction chamber, a filling nozzle connected so as to communicate with the reaction chamber, and a compensation chamber connected so as to communicate with the reaction chamber, a compensation line section and a filling line section communicating among the reaction chamber, a filling level indicator and the compensation chamber such that before filling, normal pressure exists within the compensation line section, the filling line section, the reaction chamber, the filling nozzle and the compensation chamber of the cartridge, wherein the reaction chamber, the compensation chamber and the said line sections are sealed, wherein the filling nozzle forms a free passage to the reaction chamber from outside the cartridge, and a stopper is provided which fits positively and tightly in the filling nozzle such that, when pressed in over a certain distance, fluid is displaced from the filling nozzle towards the reaction chamber wherein the filling nozzle has a filling section, which allows the biological sample to be introduced from outside, and which leads into a cylindrical compression section, wherein the filling section has a larger cross-section than the compression section and the compression section is connected to the reaction chamber via the free passage, and the stopper is designed so that it is held tightly in the compression section, wherein the reaction chamber is bounded on an upper side by a transparent, flexible film, which forms a viewing window.