SECTION 7 APPENDIX I: MENUS, PROCESSED VARIABLES, AND GLOSSARY
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7-5
Montage
Standardized electrode locations.
Patient Interface Cable (PIC)
The cable that connects the BIS sensor to the BISx.
Signal Quality Indicator (SQI)
A measure of the signal quality for the EEG channel source that is calculated based on
impedance data, artifact, and other variables.
Smoothing Rate
The rate over which the BIS value is averaged.
Suppression Ratio (SR)
A calculated parameter that indicates when an isoelectric (flatline) condition may exist.
Suppression ratio is the percentage of time over the last 63-second period that the signal is
considered to be in the suppressed state (isoelectric). When SR equals 100, it means that
during 100% of the last 63 second time period, no significant amount of electrical activity
was detected.