About Compressed Spectral Arrays (CSA)

18 Monitoring EEG

About Compressed Spectral Arrays (CSA)

The continuous EEG signal is sampled periodically and this value is stored in a frame. Each frame is processed using Fast Fourier Transformation (FFT) to provide a frequency spectrum displayed as a compressed spectral array (CSA).

The CSA window provides an overview of the patient’s EEG values over time. It may be configured to look slightly different on your monitor.

♦To view the CSA window permanently embedded on a Screen, select a Screen configured to display the CSA window.

♦To view the CSA window over the current Screen, select the EEG CSA SmartKey, if configured, or select Setup EEG or Main Setup then Show CSA.

Fp1-T3

Filter:0.5 - 30 Hz

Montage:

Montage A

 

Fp2-T4

CSA1

Buffer: A (2 Sec)

SEF (90%)

 

PPF

CSA2

The CSA contains the following information

Status line

Lead label

for example, Fp1-T3, Fp2-T4

 

 

CSA label

CSA1 or CSA2 according to EEG channel

 

 

 

 

 

 

Montage label

for example, Montage A

 

 

 

 

 

 

Filter settings

for example, 1-30 Hz

 

 

 

 

 

 

Buffer label and time

the buffer and interval between spectral lines on the CSA

 

 

 

 

 

 

Current SEF Threshold

can only be changed in Configuration Mode

 

 

 

 

Spectral lines

The energy at each frequency is computed and displayed as a spectral line

 

 

Trendlines

EEG values are sampled at configured time intervals and displayed as color-coded trendlines.

 

 

Trendlines are available for the three frequency numerics (SEF, PPF, MDF)

 

 

 

 

Annotations:

?

INOP marker

 

 

 

 

 

 

 

 

 

 

Filter change marker

 

 

 

 

 

 

 

Montage change marker

 

 

 

 

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Philips MP60/70/80/90, MP20/30, MP40/50 manual About Compressed Spectral Arrays CSA, CSA contains the following information
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MP60/70/80/90, MP40/50, MP20/30 specifications

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