User guide
ELI
O
S
ECH001XN111-A4 – 07/2022
109
Measurement on ECHOSOFT
6.1 Evoked potential modul (ABR, ECochG et VEMP)
6.1.14
Special functionality for ECochG
Select the
« Alone » display mode
and select a measurement.
1.
Graph display area :
The first curve corresponds to the one selected in (4), the other two curves are displayed by selecting "simultaneous
display" (6).
2.
Marker analysis area:
Calculation of the SP/AP ratio for the amplitude (if the 0, SP, and AP markers are positioned on the curve). The
ratio is obtained with the following formula :
𝑆𝑝/𝐴𝑝 𝑟𝑎𝑡𝑖𝑜 =
𝑆𝑃 − 𝑍𝑒𝑟𝑜
𝐴𝑃 − 𝑍𝑒𝑟𝑜
Calculation of the SP/AP ratio for the area (if all five markers are positioned on the curve). The two grey areas in
the graph appear after positioning the required markers. The areas of the two sections are calculated, and then the
ratio between them is obtained.
3.
Cursor analysis area:
Cursors A and B can be positioned by clicking on one of the two buttons in this field and then clicking on one of
the curves. At this point it will be possible to change their horizontal position on the selected curve. A second click
in the graphic area fixes its position and a second click on the corresponding button makes it disappear.
4.
Select the main curve:
As the clicks are made alternately, the data is recorded separately. You have the choice to select which polarity of
the clicks should be displayed. By default, the two records are added together ("Alternate"), but it is possible to
view the condensation (+), rarefaction (-) or subtracted curves.
5.
Enable or disable the bandpass filter.
6.
Simultaneously displays the main curve (selected in point 4) and the curves corresponding to condensation (+)
and rarefaction (-).
7.
Curve inversion button.
8.
Cursors for changing the x- and y-axis scales
9.
Note input.
10.
Measurement recording parameters
11.
Print measurement options.
12.
Serial number of the
ELI
O
S
and
E
CHO
-
DIF
used to make the measurement
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