User's Manual

Ultraview Care Network
23-18
Definitions
BIS — Bispectral Index Analysis. A mathematical calculation derived from the
frequency, power, and phase throughout the entire frequency range of the EEG.
The Index is a number between 0 and 100.
DSC — The Digital Signal Converter. The DSC contains the input connector,
amplifiers, and digitizer for the 90482 one channel EEG. The DSC is configured
for referential montage monitoring.
EEG — Electroencephalogram. Real-time electrical activity of the brain. The EEG
waveform can be further separated (digitized) into elements. The signal can be
processed in time, frequency, and Fourier analysis.
EMG — Electromyogram. Electrical activity of the muscles. Processed as the
absolute power in the frequency (Hz) range. This product calculates EMGL, which
is over a fixed 70 to 110 Hz frequency range.
EMGL — EMG Low. Refer to EMG.
Epoch — The time during which the bispectral index is calculated.
MF — Median Power Frequency measured in Hz. The frequency at which 50% of
the total power lies equally on either side. The frequency range is between 0.5
and 30 Hz.
Montage — A pattern of linking electrodes together over the scalp to generate a
display of EEG channels in a particular way. Montages can be bipolar or
referential.
PIC — The Patient Interface Cable. Used by the BIS module. This cable is
configured to tell the DSC and module to automatically use a single channel
montage for the BIS Sensor. The BIS Sensor is normally placed on the left or right
side of the forehead.
SEF — Spectral Edge Frequency. The frequency (measured in Hz) at which 95%
of the total EEG power lies below it and 5% lies above it. Frequency range is
between 0.5 and 30 Hz.
SQI — Signal Quality Index. The percentage of good epochs in the last
60-seconds that are used to calculate the Bispectal Index and spectral variables.
Not affected by the suppression ratio. Percentage values range between 1 and
100.
SR — Suppression Ratio. The percentage of time in the last 60-seconds in which
the EEG signal is considered suppressed. Percentage values range from 0.0 to
100.