27 - 6 BeneVision N22/N19 Patient Monitor Operator’s Manual
Sensor Check is initiated automatically when the BIS sensor and the patient cable are connected to the BISx or
BISx4. The measurement starts automatically after the sensor has passed the check.
• To minimize the risk of patient strangulation, the patient cable must be carefully placed and secured.
• Make sure the patient’s skin is dry. A wet sensor or a salt bridge could result in erroneous BIS and
impedance values.
• Do not use if sensor is dry. To avoid dry out, do not open pack until ready for use.
• Due to intimate skin contact, reuse may pose risk of infection. If skin rash or other unusual symptom
develops, stop using and remove.
27.7 Changing BIS Settings
27.7.1 Setting BIS Alarm Properties
To set the BIS alarm properties, follow this procedure:
1. Select the BIS numeric area or waveform area to enter the
BIS menu.
2. In the
BIS menu, select the Alarm tab.
3. Set the following alarm properties:
â—† Switch on or switch off BIS alarms.
â—† Adjust alarm limits and alarm priority.
â—† Switch on or switch off the alarm recording.
27.7.2 Choosing the BIS Smoothing Rate
The smoothing rate defines how the monitor averages the BIS value. With the smoothing rate becoming smaller,
the monitor provides increased response to changes in the patient’s state. Contrarily, the monitor provides a
smoother BIS trend with decreased variability and sensitivity to artifacts.
To change the smoothing rate, follow this procedure:
1. Select the BIS numeric area or waveform area to enter the
BIS menu.
2. In the
BIS menu, select the Setup tab.
3. Set
Smoothing Rate to 10 sec, 15 sec, or 30 sec.
27.7.3 Setting the Display of BIS Waveform Area
To set the display of BIS waveform, follow this procedure:
1. Select the BIS numeric area or waveform area to enter the
BIS menu.
2. In the
BIS menu, select the Setup tab.
3. Set
Display.
â—† If you set Display to EEG waveforms (EEG LT or EEG LE), set Scale and Speed for EEG waveforms.
â—† If you set Display to BIS parameter trends, set Trend Length.
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