Abstract: In an anesthesia protocol system, vital parameters and medication quantities are stored in a first data base in the form of real time curve signal values, said first data base being organized like a ring buffer. Typically, trend curve signal values are derived from the stored real time curve signal values, and an anesthesia protocol is produced automatically on the basis of these trend curve signal values.In order to simplify the operability of the anesthesia protocol system and to enhance the information content of the anesthesia protocol, a snapshot input device for activating a snapshot function is provided, a processing unit responding to the actuation of said snapshot input device for reading from the first data base the real time curve signal values which are assigned to a specific snapshot time domain and for storing them in the second data base as snapshot curve signal values, said second data base being not organized in the form of a ring buffer.