Patient Monitor User Manual Monitoring BIS
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BIS Range and Clinical State
BIS Index Range
100
Awake
Responds to normal voice
80
Light/ Moderate Sedation
May respond to loud commands or mild prodding/shaking
60
General Anesthesia
Low probability of explicit recall
Unresponsive to verbal stimulus
40
Deep Hypnotic State
20
Burst Suppression
0
Flat Line EEG
Note: This chart reflects a general association between clinical state and BIS
values. Ranges are based on results from a multi-center study of the BIS
involving the administration of specific anesthetic agents. BIS values and
ranges assume that the EEG is free of artifacts that can affect its
performance. Titration of anesthetics to BIS range should be dependent upon
the individual goals established for each patient. These goals and associated
BIS ranges may vary over time and in the context of patient status and
treatment plan.
- SQI: The SQI numeric reflects the signal quality for the EEG channel source and provides
information about the reliability of the BIS, SR, SEF, TP and BC numerics during the last
minute. It ranges from 0% to 100%:
0% to15%: the numerics cannot be derived.
15% to 50%: the numerics cannot be reliably derived.
50% to 100%: the numerics are reliable.
-
SR: The SR is the percentage
of time over the last 63-second period that the signal is
considered to be in the suppressed
state.
-
SEF: The SEF is a frequency below which 95% of the total power is measured.
-
TP: The TP numeric indicates the power in the frequency band 0.5 Hz to 30 Hz. The useful
range is 40 dB to 100 dB.
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