Proper Use
27
Table 6. Continued.
Trouble symptom
Cause
Way of Removal
The exam report can’t be created
or printed.
1. The printer is not set up.
2. The printer is not connected to
PC or out of order.
1. Set up the printer using Windows
control panel.
2. Check the printer connection and
its working order.
After proper setting of EEG
electrode, the impedance value is
1000 k
Ω
.
Derivation cable breaks.
Replace the derivation cable.
EEG traces recorded in one
hemisphere channel are not
displayed adequately.
1. Problems with referent electrode
(ear electrode during monopolar
recording with ear electrode
referent).
2. Problems with electronic unit.
1. Check the quality of electrode
set-ting by impedance measuring.
2. Change places of the referent
electrodes cables (A1 and A2). If
the problem is repeated in the other
hemi-sphere that means the
electrode is out of operation.
Replace it.
3. If the problem was not removed,
the electronic unit is out of
operation. Consult
Neurosoft
Ltd.
EEG traces recorded in one of the
channels are not displayed
adequately.
1. The derivation cable is out of
order.
2. Problems with electronic unit.
1. Check the quality of electrode
set-ting by impedance
measurement.
2. Replace the electrode.
3. Consult
Neurosoft
Ltd.
3.3. Exams Performing Using the Systems
Before EEG exams carrying out, it is necessary to set up the digital EEG system and
other equipment taking into consideration user manual recommendations.
Exam carrying out includes the following stages:
·
The electrodes and sensors set up.
·
The signal recording and functional tests carrying out.
·
The recorded EEG review, analysis and printing.
The recording from electrodes and sensors and their placement on the patient is done
according to user manual recommendations.
The order of signal registration and records analysis is given in details in the user
manual.
After finishing the work it is necessary to clean the electrodes in according to the
requirements of the operational documentation of the manufacturer.
If the next patient is not planned till the end of the working day, the digital EEG
system should be switched off. For that switch off the digital EEG system software
and then do the same with the computer and printer. If the long-term dwell in
operation is planned (several days or more), power supply plug of the isolation
transformer is recommended to be disconnected to the power circuit.
