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Published on: March 31, 2016
Quantification of EEG reactivity in comatose patients
Mathilde C Hermans1, M Brandon Westover2, Michel J A M van Putten3
1Department of Technical Medicine, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands; Department of Neurology, Comprehensive Epilepsy Center, Yale University School of Medicine, PO Box 208018, New Haven, CT 06520-8018, USA.
Quantitative electroencephalography (EEG) reliably measures EEG reactivity in comatose patients. This objective approach enhances the assessment of reactivity compared to subjective visual analysis.
Area of Science:
- Neuroscience
- Medical Technology
Background:
- EEG reactivity is a key prognostic indicator in comatose patients.
- Visual assessment of EEG reactivity is subjective and can be unreliable.
Purpose of the Study:
- To develop and validate a quantitative EEG approach for assessing reactivity in comatose patients.
- To improve the objectivity of EEG reactivity evaluation.
Main Methods:
- Analyzed 1-minute EEG segments before and after stimulation in 59 comatose patients.
- Quantified EEG reactivity using 13 parameters and spectral temporal symmetry.
- Evaluated classifier accuracy against expert consensus.
Main Results:
- A binary classifier using spectral temporal symmetry achieved high accuracy (Median AUC: 0.95).
- Quantitative EEG results showed substantial agreement with expert assessments, comparable to inter-expert agreement.
- Probability values correlated with the degree of reactivity.
Conclusions:
- Automated quantitative EEG analysis reliably quantifies EEG reactivity.
- Quantitative EEG offers an objective method for evaluating reactivity in comatose patients.
