Aspect Medical Systems BIS VIEW, Руководство по эксплуатации

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SECTION 3 OPERATING THE BIS VIEW MONITORING SYSTEM
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3-8
3.3.4 Signal Quality Indicator
The Signal Quality Indicator (SQI) is a measure of the signal quality for the EEG channel
source and is calculated based on impedance data, artifact, and other variables. The SQI bar
graph is displayed in the title bar above the BIS number. Signal quality is optimal when all
five bars are green. When signal quality is too low to accurately calculate a BIS value, the BIS
value and other trend variables that are adversely affected by artifact will not be displayed on
the screen.
3.3.5 Electromyograph (EMG) Indicator
The EMG bar graph displays the power (in decibels) in the frequency range 70 - 110 Hz.
This frequency range contains power from muscle activity (i.e., electromyography or
“EMG”) as well as power from other high-frequency artifacts. When the indicator is low, it
indicates that EMG activity is low.
BIS monitoring is optimal when the bar is empty.
1 bar represents power in the 30-38 range
2 bars represent power in the 39-47 range
3 bars represent power in the 48-55 range
4 bars represent power greater than 55.
An EMG trend line can be added to the BIS Trend Display screens. See Section 3.6.3.1
“Screen Options.”
3.3.6 Case ID
A new case number is assigned each time a new sensor is attached and passes the Sensor
Check. Case ID is displayed on the BIS Number Display Screen and the Chart Data screen.
3.3.7 Message Region
The Message Region is a space reserved for status and error messages, just below the BIS
Number. Messages are prioritized so that a high priority message displays before a lower
priority message. The background color of the message indicates its priority:
Message Priority Background Color
High Orange
Medium Yellow
Low Light
Blue
Information only Dark Blue
Diagnostic codes may be displayed above the messages by activating them in the Diagnostic
Menu. Specific error messages are explained in the Troubleshooting section of this manual
(Section 6).