Operator's Manual

The BIS™ Advance Parameters
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BIS™ Advance Monitor
smoothing rate provides a smoother trend with
decreased variability and sensitivity to artifact.
EEG
(Electroencephalogram)
A visual representation of the rhythmic
fluctuations of electric potential between parts of
the brain (brain waves).
EEG
(Electroencephalogram)
Amplitude
The maximum absolute voltage of the
waveform. The EEG waveform amplitude is
typically conveyed in microvolts (µV).
EMG (electromyogram) A measurement technique indicating forehead
muscle activity and other high-frequency artifacts.
The EMG numeric indicates the absolute power in
the 70-110 Hz range. This frequency range
contains power from muscle activity as well as
power from other high-frequency artifacts. It is
conveyed in decibels (dB) relative to 0.0001µV2.
Significant forehead muscle activity may cause the
BIS™ value to increase, so when EMG is high, the
BIS™ value should be interpreted with caution.
SQI (Signal Quality
Indicator)
SQI measures the signal quality of the EEG. It
represents the percentage of good epochs and
suppressed epochs in the last 120 (61.5 seconds)
that could be used in the BIS™ calculation.
It is calculated based on impedance, artifact
presence, and other variables. An icon with 5
green bars represents the optimal SQI.
Burst Count
The number of EEG bursts per minute, where a
“burst” is defined as a short period of EEG activity
preceded and followed by periods of inactivity
(suppression).
Burst count represents the number of bursts in the
last minute. Burst count is displayed as a trend and
as a numeric value.
This type of electroencephalography (EEG)
pattern, which is characterized by periods of high-
voltage electrical activity alternating with periods
of no activity in the brain, is a pattern found in
patients with inactivated brain states, due to