GE CARESCAPE - Compressed spectral array (CSA); How to interpret the EEG values

EEGandauditoryevokedpotentials
●Burstsuppressionpatternisalsodetected,andburstsuppressionratio(BSR)-the
ratioofsuppressedEEGinatimeperiodof60seconds-iscalculated.
●Amplitude(Amp.)ofEEGiscalculatedasarootmeansquare(RMS)valuein
microvolts.
Compressedspectralarray(CSA)
Thespectrumisdisplayedgraphicallyasasingle,continuouslyupdatingcurve,or
compressedspectralarray,CSA,wherespectraarestackedoneontopoftheotherto
formatrenddisplay.EEGsplitscreendisplaysthecompressedspectralarrayofallthe
monitoredchannelsonthelefthandsideofthescreen.
EEGCSASEF
5min
1.Channel(e.g.Fp1–T3,C3–01)
2.Spectraledgefrequency,SEF(redlineinthe
display)
HowtointerprettheEEGvalues
ToevaluatecertainEEGresults,forexampletodistinguishepilepsyfromother
conditions,itisnecessarytoassessthesendingstogetherwithothersymptoms,
includingunconsciousness.
EEGndingsareusuallynon-specic,andconsequentlytheyindicateamalfunction
butdonotrevealthereasonforit.
Distinguishablecharacteristicstolookforare:
●Frequencyandamplitude
●Rhythmlocationandspecicwaveforms
●Artifact
●Reactivity
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