Maico MB 11 BERAphone, Руководство по эксплуатации

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Operation Manual MB 11 BERAphone
®
/Classic
8100496 Rev. 6 53 23/10/2019
The signal quality indicator light on the MB 11 BERAphone
®
also shows whether the
signal quality is good or not. As long as the signal quality on the screen is red, the
signal quality indicator lights red, too. As soon as the signal quality is better and the
test starts, the signal quality indicator on the MB 11 BERAphone
®
changes to green.
If the signal quality decreases for a certain time the signal quality indicator on the
MB 11 BERAphone
®
changes to red again and the test is paused. Try to increase the
signal quality again by moving the MB 11 BERAphone
®
slightly to improve the
impedance. If the bad signal quality is caused by movements from the baby and muscle
artifact, the test will continue automatically as soon as the baby is calm and the signal
quality is good again. If necessary due to excessive agitation of the baby, consider
manually pausing the data collection by pressing the
Pause button and allow the baby
to calm down before continuing the screening.
Advanced Display Mode
– EEG-Display
The advanced display mode can be entered by clicking on the box EEG on the left of
the test screen. The EEG view at the top of the screen allows you to monitor the
ongoing real-time EEG activity (Figure 38).
Figure 38
The EEG in this view will be relatively flat when the baby and electrical conditions in
the environment are quiet. When the baby becomes active you will note higher amplitude
activity in the EEG representing myogenic activity from the baby. If there is electrical
interference in the room you may note spikes of activity showing in the EEG. This may be
improved by checking the placement of the electrodes on the baby’s head. View of a
rolling, cyclical waveform in the EEG can indicate that the electrode gel from two sites on
the baby’s head have merged. This can negatively affect the quality of the recording.