Method and device for evaluating an intensive EEG or an EEG during anaesthesia

摘要

A computer implemented method and system is used for evaluating an intensive EEG or an EEG during anaesthesia. Time domain and/or frequency range parameters are determined from the EEG graphs. The determined parameters are used in multivariate classification functions and the intensive EEG or EEG during anaesthesia are automatically divided into stages. The EEG graphs are also analysed for interfering signal components from the quantity of biosignals of graphs characteristic of intensive EEGs or EEGs which are not performed during anaesthesia. If interfering signal components are identified, the existence of biosignals of graphs characteristic of intensive EEGs or EEGs which are not performed during anaesthesia is verified by artifact analysis in the absence of artifacts, and is not verified if artifacts are identified.

主权项

1. A device for evaluating an electroencephalogram (EEG) from a patient under anesthesia or in intensive care, comprising:
a measuring unit having EEG electrodes in a multi-electrode arrangement and which measures an EEG of a patient; artifact sensors configured for detection of shape modification signals correlating with deformation in said EEG electrodes; and a computer configured to perform the steps of
establishing parameters from time and/or frequency domains from EEG curve profiles of said EEG measured with said measuring unit,inserting said parameters of said establishing step into multivariate classification functions to automatically classify stages of the EEG,performing a first analysis of said EEG curve profiles which searches for scattering-in signal components, wherein said scattering-in signal components are atypical EEG signal components, wherein atypical bio-signals and artifacts are types of atypical EEG signal components;performing a second analysis on search results of said first analysis which verifies if such search results are one of
a) atypical bio-signals, orb) artifacts, wherein if scattering-in signal components are detected by the computer in said first analysis and shape modification signals are not detected by said artifact sensors, the existence of atypical bio-signals in said search results is verified in said second analysis, wherein said existence of atypical bio-signals in said search results is not verified if shape modification signals are detected by said artifact sensors, wherein said computer is further configured to provide an output based on the verification or non-verification outcome useable for display, and wherein said atypical bio-signals are different from said artifacts.