Dräger Zeus Infinity Empowered Instructions For Use Manual page 248

Monitoring
Impedance test
As soon as the sensor is connected to Zeus IE an
automatic impedance test commences to test the
quality of the BIS electrode connection.
NOTE
Before commencing BIS monitoring make sure
the sensor is connected up properly and that it
has passed the impedance check.
CAUTION
The impedance check signal emitted by the BISx
module can cause interference with other equip-
ment (e.g. evoked potential monitors).
The dialog window for the impedance test can be
opened via Sensors/Parameters > BIS/NMT > Im-
ped. check (A).
Sensors/Parameters
B
C
D
E
F
The page displays:
B EEG waveform display
C EEG scale: Scale for the EEG waveform in µV
D SEF display: Selection of an additional param-
eter displayed in the parameter box
Spectral edge frequency SEF: 0.5 to 30 Hz in
0.1 Hz increments
Total power PWR: 40 to 100, in 1 dB increments
(in the frequency range of 0.3 to 110 Hz)
Burst count BCT: 0 to 30 in 1-unit increments
248
E Check sensor: Start button for the manual
sensor check with display of starting time
F Electrode status: Electrodes 1 to 4, depending
on the sensor being used
G The
its > Noninvasive dialog window for alarm limit
setting.
After the first impedance test, the color of the Start
button (E) changes from gray to green. Further im-
pedance test can be manually started. Zeus IE re-
ports the general status of the impedance testing as
follows:
Pass – means that the impedance testing based on
the impedance of the combined electrodes was
successful.
Close dialog window and continue BIS monitor-
ing.
Fail – means that the impedance testing failed.
Press the electrodes on again firmly, improve
positioning
Replace sensor if necessary
NOTE
A
An automatic sensor impedance check is per-
formed whenever a BIS sensor is connected to
the sensor cable.
NOTE
When the sensor impedance check has been
G
completed, all the signal status messages and
alarms are suspended for 60 seconds. The time is
required in order to restore signal quality.
Instructions for use Zeus Infinity Empowered SW 2.n
button opens the Alarms > Alarm lim-