[The prognostic values and correlations between Hockaday's (EEG) and Nathanson-Bergman's (ENG) scales in the context of new definition of death].

A group of 92 patients being under treatment in Intensive Care Unit of Neurosurgery Clinic in Bydgoszcz were observed using EEG, ENG and neurological findings. The eeg patterns, classified by Hockaday's scale, were related to the clinical stage, described using Glasgow Coma Scale, and the ENG patterns (Nathanson-Bergman's scale). Unfavourable prognosis was indicated by appearance of IV and V stage on Hockaday's scale and the caloric test seemed to mark the moment of complete breakdown of all brain-stem functions. The present paper demonstrated the value of EEG- and ENG patterns in description and forecasting of patients in coma.