A medical device including a body and a monitor system constituting a display and/or operating unit which includes a curved display and/or user interface. The medical device is preferably designed as an apparatus for extracorporeal blood treatment and, more preferred, as a dialysis machine including a housing constituting the body for accommodating operational components for the extracorporeal blood treatment. The display and/or user interface of the monitor system is designed to be concavely or convexly curved about at least one space axis, preferably a vertically or horizontally extending axis.
