Operation Manual MB 11 BERAphone
®
/Classic
8100496 Rev. 6
44
23/10/2019
Make sure that the face, neck and shoulder of the baby are relaxed and free of any
obstructions.
IMPORTANT
NOTE:
Avoid fluid bridges caused by electrode-gel connections between
the three gel sites on the skin. This can be avoided by always rubbing in the direction
as seen in Figure 22 to ensure three distinct gel areas that do not contact each other.
Particularly critical is the distance between the electrode above the ear (ground
electrode) and the vertex electrode. Ensure that at least a finger-wide area between
electrodes remains free of electrode-gel. Merging of gel from one site into the other will
cause very poor recordings and increase the likelihood of
REFER
results.
Finally, using your finger to control the quantity of gel, apply a small drop of electrode-
gel on the tip of each electrode of the BERAphone
®
.
5.2.2.2 Placing the BERAphone
®
Place the BERAphone
®
on the baby's head (Figure 23). First position the mastoid
electrode below the earlobe. If the baby moves, follow the head movements with the
BERAphone
®
. When the baby has stopped moving, lower the other two electrodes into
place making sure to achieve good contact with the prepared skin sites.
Figure 23
When you start the test, the impedance test will show you if the electrodes are making
good contact with the skin. After passing the impedance test, the measurement starts.
IMPORTANT NOTE:
The MB 11 BERAphone
®
does not require pressure to hold it in
place. You are supporting the BERAphone
®
only to maintain the position of the
electrodes and ear cushion on the baby’s head.
The ear cushion must be placed so that it is surrounding the ear. Make sure there are
no obvious gaps between the cushion and the baby’s skin as this may reduce the
intensity of the acoustic stimulus delivered to the baby’s ear and increase the chance
of a
REFER
test outcome. If necessary reposition the BERAphone
®
or change the
position of the vertex electrode in its rotating housing to achieve a better fit.
All electrodes must contact the skin well.
Summary of Contents for MB 11 BERAphone
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