The invention relates to the field of technical medical devices, for example, dialysis machines. The object of the invention is to improve upon a technical medical device in such a way that the structural complexity of the technical medical device, the assembly, cleaning and maintenance expense for the technical medical device and the cost of the technical medical device are reduced, but at the same time the variety of functions increases. The technical medical device according to the invention therefore comprises a screen, which can be equipped to function as a sound converter or as an optical sensor or as a receiver and sender of electromagnetic waves. In addition, a method is disclosed whereby the control of the technical medical device is influenced on the basis of the input and output of information via the inventive display screen.
