User guide
BABYS
C
REEN
ECH001XN121-A4 – 07/2022
25
Chapter 3. ABR measurement
3.4 Measurement
3.4.2
Measurement
When launching the measure, if the electrodes are not
well placed or not well connected, an impedance verifi-
cation window is shown.
The impedance values have to be the smaller and the most balanced as possible to provide the most reliable
The
ABR
measurement window opens, click on
"
Start
". The measure will begin, ensure that the patient
is not too agitated during the measurement.
Two stacked curves are displayed, they are built turn by turn. This measurement method enables to calculate the
correlation between the two curves.
The rejection indicator warns you when the rejection threshold is reached. If it stays locked on red it means that the
patient muscular activity is too high. When the patient will be more relaxed, the measurement will automatically resume.
If this problem remains, the electrode eventually needs to be replaced to reduce the impedance, otherwise, the test should
be reported when the patient will be less agitated.
The “
Stop
” button and the top right cross enable to stop the measurement.
If value
V-
is greater than 10kΩ, wipe the patient’s forehead again and reattach new electrodes.
If value
V+
is greater than
10kΩ, check that the mastoid (or the neck, depending on the chosen wiring) elec-
trode is properly placed. If necessary, wipe the patient’s mastoid again and reattach new electrodes.
Rejection indicator
Green = OK
Red = too much muscular
activity
Graph area of the
current measure
Number of averaging
Power
Normality area for the
wave V
Correlation between the 2
curves.
Latency of the detected waves
