GE CARESCAPE, Руководство пользователя

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Bispectral index
BIS measurement on the monitor screen
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Suppression ratio (SR) number indicates the percentage of suppressed (flatline)
EEG detected over the last 63 seconds
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Bar graphs:
￭
Signal Quality Index (SQI): the quality of the EEG signal. NOTE: When the SQI is in
the range 15% to 50% (low), the BIS number is displayed in gray
￭
Electromyograph (EMG): the absolute power in the 70 Hz to 110 Hz frequency
band
Using the BIS measurement
Selecting the BIS waveform size
This setting determines the maximum drawing scale for BIS waveforms.
1. Press the module key or select the BIS parameter window.
2. Select the Setup tab.
3. Select a value from the Scale µV list.
Selecting the EEG sweep speed
This setting determines the drawing speed for the EEG waveform.
1. Press the module key or select the BIS parameter window.
2. Select the Setup tab.
3. Select a value from the EEG Sweep Speed list.
The smaller the value, the slower the sweep speed.
NOTE
This setting is available in BIS, EEG and Entropy setups.
Regardless of where you change it, it will affect all three
parameters.
Selecting the BIS smoothing rate
Smoothing rate affects the appearance of the BIS trend and the BIS value. It
determines the amount of artifact-free data that is required for calculating the BIS
value.
1. Press the module key or select the BIS parameter window.
2. Select the Setup tab.
3. Select a value from the Smoothing Rate list. The bigger the value, the “smoother”
the trend.
Setting BIS filters
With BIS filters you can filter out disturbances from the EEG signal and improve the
signal quality.
1. Press the module key or select the BIS parameter window.
2062971-001 CARESCAPE Modular Monitors 397