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■ ASYM graph: displays in the center of the DSA view. It shows the degree of asymmetry in EEG power
between the left and right hemispheres. The ASYM scale begins at 20% at the center line and runs left or
right to 100%. Asymmetry data less than 20% are not displayed on the graph, but are available in the
tabular trends.
20.10 BIS Troubleshooting
This section lists the problems that might occur. If you encounter the problems when using the equipment or
accessories, check the table below before requesting for services. If the problem persists after corrective actions
have been taken, contact your service personnel.
• For a comprehensive list of physiological and technical alarm messages, see DAlarm Messages.
Problem Solution
Measurement does not start 1. Check the sensor attachment to the patient and the sensor placement. Check
the sensor contact with skin.
2. Check the sensor type.
3. Check all connections and the patient cable.
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