BeneVision N Series Patient Monitor Operator’s Manual 27 - 11
27.10 EEG Troubleshooting
This section lists the problems that might occur. If you encounter the problems when using the equipment or
accessories, check the table below before requesting for services. If the problem persists after corrective actions
have been taken, contact your service personnel.
• For a comprehensive list of physiological and technical alarm messages, see DAlarm Messages.
Problem Solution
EEG signal is noisy 1. Check that the electrodes are properly connected and not dried out.
2. Check that the electrodes properly contact with skin.
3. Perform electrode impedance check.
4. Calm the patient since frontal muscle activity can cause artifact.
5. Remove sources of external electrical noise (for example, the lamps)
from the vicinity of the patient’s head.
6. ECG monitoring may cause artifact; change electrode positioning.
EEG cable and electrodes properly connected,
but no EEG waveforms.
1. The number of channels in the montage is smaller than the number
of channels connected to the patient. Check the number of channels.
2. Check screen setup and make sure that you have selected the EEG
parameter.
The EEG numerics area displays”- -”. The patient has high muscle activity in the head area, or noise from
some interfering equipment is coupling to electrode cables. Relax the
patient and remove the source of noise.
EEG waveform baseline fluctuates. 1. Sweating may cause variations in the electrode impedance. Check the
patient.
2. If the fluctuation is disturbing, prepare the skin and replace the
electrodes.
The electrode impedances show ‘- -’ and there
is a message prompting to check the ground
electrode?
The ground electrode is poorly connected to the patient. Check the
electrode and cable. If the impedance of the electrode is too high, the
measurement fails even if the electrode is properly attached. Use better
electrodes or prepare the skin better.
To Next Page
Loading...
Need help?
General
