The new biomedical device allows for the first time an objective evaluation of the individual anaesthetic fitness of patients and thus of the surgical risk. It assesses the cardio-pulmonary system as well as the dynamic load capacity of the patient. The device can be used for routine preoperative screening due to its simplicity and the relatively short time required. The anaesthesiologist‘s receives valid and reproducible results for anamnesis as well as individual and safe planning of anaesthesia.