User guide
ELI
O
S
ECH001XN111-A4 – 07/2022
47
Handheld mode measurement
4.2 ABR
Two curves are displayed. The bottom curve is the curve being constructed and its shape is updated in real-time
depending on the number of clicks already fed into the patient's ear. The top curve is a plot of the previous measurement.
This display mode indicates whether any reproducibility of the curves occurs as the measurement is made.
The rejection indicator light notifies you when the rejection threshold is reached. If 40 successive rejections are de-
tected, the current point is rejected and the "
Rejection
" information appears on the screen. This phenomenon means that
the patient's muscular activity is too intense. When the patient is more relaxed, measurement will start again automatically.
If the phenomenon persists, it means that the rejection threshold has been calibrated too low. You can also exit from the
measurement by clicking “
Stop”
then restarting another measurement by adjusting the rejection threshold to a higher
value or selecting the automatic rejection mode.
Use the stop button to
“stop”
the current measurement and pass to the next repetition, power or even the next ear.
The back cross in the right top corner allows to completely stop the measurement. Once data acquisition is over, the curve
is reconstructed. You then have the choice of saving the data by clicking on "
Save
" or deleting it by exiting from the
window using the back cross.
4.2.2
Screening mode
4.2.2.1
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.
Rejection indicator
Graph area of the
previous measure
Graph area of the
current measure
Number of averaging
Power
Normality area for
waves :
I, III et V
For more details about the curve consulting options, please refer to paragraph
The saved data can be consulted in the patient's "
Consultation
" menu.
