Quantitative EEG in assessment of anaesthetic depth: comparative study of methodology.

Eeg-based Assessment of Anaesthetic Depth Using Neural Networks

BIS and state entropy of the EEG - comparing apples and oranges.

Monitoring of anaesthetic effects on the main target organ of anaesthesia, the brain, has evolved from a research tool to a clinical method and may help to adjust anaesthetic drugs to specific individual requirements (i.e. to avoid inadequate anaesthetic depth with the risk of awareness or excessively deep hypnosis). The term 'anaesthetic depth' is poorly defined and dates back to a period when...

Peak and averaged bicoherence for different EEG patterns during general anaesthesia

BACKGROUND Changes in nonlinear neuronal mechanisms of EEG generation in the course of general anaesthesia have been extensively investigated in research literature. A number of EEG signal properties capable of tracking these changes have been reported and employed in anaesthetic depth monitors. The degree of phase coupling between different spectral components is a marker of nonlinear EEG gene...

Assessment of Anesthesia Depth Using Effective Brain Connectivity Based on Transfer Entropy on EEG Signal

Introduction: Ensuring an adequate Depth of Anesthesia (DOA) during surgery is essential for anesthesiologists. Since the effect of anesthetic drugs is on the central nervous system, brain signals such as Electroencephalogram (EEG) can be used for DOA estimation. Anesthesia can interfere among brain regions, so the relationship among different areas can be a key factor in the anesthetic process...

Comparative assessment of carcinogenic risk of respiratory exposure to 1,3-Butadiene in a petrochemical industry by the US Environmental Protection Agency (USEPA) and Singapore Health Department methods

Introduction: 1,3-Butadiene is a carcinogenic compound that can be emitted to the atmosphere from several sources like petrochemical industry. One way to determine the level of carcinogenic and health effects of respiratory exposure to pollutants in the workplace is to use risk assessment methods. The aim of this study was to comparative assessment of carcinogenic risk of respiratory exposure t...