User guide
BABYS
C
REEN
ECH001XN121-A4 – 07/2022
24
Chapter 3. ABR measurement
3.4 Measurement
•
In the case of the 4 points wiring, the electrodes
V+
and
V+
must be attached behind the ear to be tested (on the
mastoid).
•
In the case of the 3 points wiring, only the electrodes
V+
must be attached to the base of the neck. Ce câblage est
recommandé pour le dépistage de la surdité du nourrisson, mais il n’est utilisable que si le patient ne tient pas encore
sa tête.
•
Connect the electrode in the middle of the forehead (
minus
) with the
Black
clip and the
Patient Reference
with the
Green
clip.
•
In the case of the 4 points wiring, the
Red
clip must be connected to the electrodes placed behind the
Right
ear and
the
Blue
one behind the
Left
ear. The
Right
/
Left
switch is automatically done.
•
In the case of the 3 points wiring, the
Red
clip must be connected to the electrodes placed in the base of the neck.
The
Blue
clip stay unconnected.
•
Insert the ear tips plug on
Blue
acoustic stimulator in
left
ear. Insert the ear tips plug on
Red
acoustic stimulator in
Right
ear. The
Right
/
Left
switch is automatically done.
3.4
Measurement
3.4.1
Setting up the measurement parameters
Once the screening
ABR
diagnosis has been selected its
configuration window appears. Those parameters are
described below.
•
“Power”
: conventionally the new born screening test should by made between 35 and 40 dB, however it is possible
to modify this value, but beyond 50 dB the device shows a warning message indicating that at this power the
measure is not a screening test.
•
«Chirp»
: instead of click stimulation, the device will use Chirp (Chirp is anly available in screening mode)
•
“3 points wiring”
: use a setup based on only 3 electrodes instead of the classical 4 electrodes. Rather than using
the red and blue electrode on the corresponding mastoid, it is possible to only use the ref one on the new born neck.
•
Button “Wiring”
: show an illustration on how to put the electrodes on the newborn
•
«Tube»
:
tick the box if you use the acoustic stimulator with tube.
Select «
Right
» or
«left»
to start the measurement.
The speed and accuracy of the measurement depend mainly on the child's condition. Ideally, the baby should
be sleeping and as relaxed as possible.
The state of the options
“3 points wiring”
and
“Tube”
are saved for the next measures, however, the power
setting is always set back to 40 dB to be replaced in screening conditions.
