The invention relates to a medical device (100) for use in manufacturing a plaster impression of a limb stump, in particular a lower leg stump, wherein the device (100) has a pressure vessel (1) having a fluid chamber or pressure chamber (DK) for receiving or storing a pressurized fluid (F). The pressure vessel (1) has a wall (3) made of a first material, wherein the wall (3) delimits an interior (I) of the pressure vessel (1) with respect to an exterior (Ä), wherein the pressure vessel (1) has an inlet opening (9) for introducing the limb stump (KS) into the interior (I) of the pressure vessel (1), and has a fluid-tight membrane (5) made of a second material, which is arranged to form or delimit the fluid chamber or pressure chamber (DK). An upper section of the membrane (5) is, preferably detachably, fastened to the pressure vessel (1) by means of a connector (53).
