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Anesth Analg 2007;104:135-139
© 2007 International Anesthesia Research Society
doi: 10.1213/01.ane.0000249045.52690.e8

TECHNOLOGY, COMPUTING, AND SIMULATION

Construction of the Electroencephalogram Player: A Device to Present Electroencephalogram Data to Electroencephalogram-Based Anesthesia Monitors

Matthias Kreuzer, MSc*, Eberhard F. Kochs, MD*, Stefanie Pilge, MD*, Gudrun Stockmanns, PhD{dagger}, and Gerhard Schneider, MD*

From the *Department of Anesthesiology, Technische Universität München, Munich; and {dagger}Department of Computer Sciences, Universität Duisburg-Essen, Germany.

BACKGROUND: Recently, an increasing number of electroencephalogram (EEG)-based monitors of the hypnotic component of anesthesia has become available. Most of these monitors calculate a numerical index reflecting the hypnotic component of anesthesia. Most of the underlying algorithms are proprietary. Therefore, a quality check or comparison of different indices is very complex.

METHODS: Because there is limited information about the algorithms used for index calculation of the different monitors, a reliable comparison or test of the monitors is possible only if the same set of EEG data are presented to each monitor.

RESULTS: Parallel EEG monitoring during surgery is limited to two or three monitors because the space for electrode placement on the head is limited. This problem can be solved by using the EEG player to play back recorded EEG data to different monitors.

CONCLUSIONS: The output of the player corresponds to the original EEG signal. A comparison of different indices based on identical EEGs is therefore possible. The index reproducibility can also be checked, if the same signal is presented to different monitors.






Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2007 by the International Anesthesia Research Society.