SECTION 3 OPERATING THE BIS VIEW MONITORING SYSTEM
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3-10
3.4.1
BIS Trend Graph
The BIS Trend Graph plots the values of the Bispectral Index over a 1 hour time period.
The
BIS trend
is indicated with a thick line and its unit labels appear on the left axis. The
current date and time display in the top right section of the screen (See Figure 9 and Figure
10). A secondary trend line showing EMG activity may be added to the graph, if desired, by
requesting it in the Screen Options Menu.
3.4.2
Target Range
A target range of optimal BIS values may be set by the user. When activated, this target
range displays on the BIS Trend Graph.
If a
target range
for BIS has been set, the target area displays as two horizontal lines
showing the upper and lower target ranges. If the BIS value falls outside of the target range,
a message displays in the Message Region of the screen, and if an audible alarm was
requested in the target range setup screen, the alarm sounds (unless alarms have been
silenced). The alarm continues to sound until the BIS value returns to the target range or the
alarm is silenced by pressing the alarm key. See Section 3.6.3.2 “Alarms: The Alarms Menu”
for more information.
3.5
BIS Trend Display Screen with EEG
The BIS Trend Display Screen with EEG can be displayed by pressing the
[TREND/EEG]
soft key at the bottom of the screen. The following information displays:
•
The BIS Number display in a smaller format
•
The BIS Trend Graph (See Section 3.4.1 “BIS Trend Graph”)
•
EEG waveforms
•
Suppression Ratio (SR), if requested in the Screen Options Menu. See Section 3.6.3.1
“Screen Options” for details.
Figure 10 - BIS Trend Display Screen with EEG
