GE CARESCAPE, User Manual

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EEG and auditory evoked potentials
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Burst suppression pattern is also detected, and burst suppression ratio (BSR) - the
ratio of suppressed EEG in a time period of 60 seconds - is calculated.
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Amplitude (Amp.) of EEG is calculated as a root mean square (RMS) value in
microvolts.
Compressed spectral array (CSA)
The spectrum is displayed graphically as a single, continuously updating curve, or
compressed spectral array, CSA, where spectra are stacked one on top of the other to
form a trend display. EEG split screen displays the compressed spectral array of all the
monitored channels on the left hand side of the screen.
EEG CSA SEF
5 min
1. Channel (e.g. Fp1–T3, C3–01)
2. Spectral edge frequency, SEF (red line in the
display)
How to interpret the EEG values
To evaluate certain EEG results, for example to distinguish epilepsy from other
conditions, it is necessary to assess these findings together with other symptoms,
including unconsciousness.
EEG findings are usually non-specific, and consequently they indicate a malfunction
but do not reveal the reason for it.
Distinguishable characteristics to look for are:
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Frequency and amplitude
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Rhythm location and specific waveforms
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Artifact
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Reactivity
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