Mindray BeneVision N22 User Manual

27 - 4 BeneVision N22/N19 Patient Monitor Operator’s Manual
Bilateral BIS monitoring simultaneously monitors both cerebral hemispheres. Besides above parameters, it also
provides the following parameters:
27.4 BIS Display
EMG
(Electromyography)
EMG bar graph reflects the electrical power of muscle activity and high frequency
artifacts. Low EMG indicates that EMG activity is low. BIS monitoring conditions are
optimal when the bar is empty.
SR
(Suppression Ratio)
SR numeric is the percentage of time over the last 63-second period during which the
EEG is considered to be in a suppressed state.
SEF
(Spectral Edge Frequency)
The SEF is a frequency below which 95% of the total power is measured.
TP
(Total Power)
TP numeric is a measure of the absolute total power in the frequency ranging from 0.5 to
30.0 Hz. The useful range is from 40 to 100 db.
BC
(Burst Count)
A burst means a period (at least 0.5 second) of EEG activity followed and preceded by
inactivity. The BC numeric helps you quantify suppression by measuring the number of
EEG bursts per minute. For single side BIS monitoring, this parameter is intended for the
BIS module with the Extend sensor only. BC numeric is valid only when SQI≥15% and
SR≥5%.
Parameter Description
sBIS
(BIS Variability Index)
sBIS numeric represents the standard deviation of the BIS variable over the last three
minutes.
sEMG
(EMG Variability Index)
sEMG numeric represents the standard deviation of the EMG value over the last three
minutes.
ASYM
(Asymmetry)
ASYM is a processed variable indicating the percentage of EEG power presented in the
left or right hemisphere with respect to total (left and right) EEG power.
Designation ‘L’ of the asymmetry data indicates asymmetry to the left side.
Designation ‘R’ of the asymmetry data indicates asymmetry to the right side.
Parameter Description
(3)
(4)
(5)
(1) (2)
(1) BIS waveform
The display of BIS waveform area depends on the setting of
Display from the BIS menu. For more information, see
27.7.3 Setting the Display of BIS Waveform Area.
(2) BIS value
(3) SQI indicator
◆ Empty: SQI < 15%, unable to calculate BIS and secondary parameter values. BIS and secondary parameter
values are displayed as “---”.
◆ 1 to 2 bars: SQI 15% - 49%, parameter values are unreliable.
◆ 3 to 5 bars: SQI 50% - 100%, parameter values are reliable.
(4) EMG indicator

Mindray BeneVision N22 Specifications

General

Brand	Mindray
Model	BeneVision N22
Category	Monitor
Language	English