Stapedial Reflex Test - Resonance R16M Mode D'emploi

3. Children function
When performing tympanometric tests in children you can select the "Children" function. This option
distracts them from the test by showing images and animations on the display.
It is possible to switch from adult to child mode and vice versa by pressing the button
you can see in the picture. Animations automatically start by pressing the start button
or, if the autorun function has been activated, by inserting the probe into the ear. In the
latter case it is possible to manually start the video by holding down the child button for
a few seconds. In order to visualize the test result the output key has to be pressed for 6
seconds.

4.2 Stapedial Reflex test

It is also possible to investigate whether a stapedial reflex is present. In this case, the 226 Hz tone is
used to measure the admittance of the ear, while a short tone at a different frequency is presented
(the reflex stimulus). The level of this stimulus is increased in steps until the stapedial muscles respond
causing the tympanic membrane to become stiffer, or a preset maximum level is reached. When the
change in admittance exceeds a predetermined threshold, this constitutes a reflex and the change in
admittance at that level when the stimulus is applied is displayed as a plot against time.
The stapedial reflex is measured at the static ear canal pressure that produces the maximal
admittance, so reflex measurements are taken after the tympanogram is measured when the peak
admittance pressure has been established.
The reflex stimulus may be produced in the ear being measured (ipsilateral mode), the opposite ear
(contralateral mode) or in both ears (ipsilateral mode followed by contralateral mode). For
contralateral stimulation the reflex tone is produced in a separate transducer supplied with the
instrument.
Test execution
Press the REFLEX icon (see adjacent image) from the main page to enter the Reflex test.
R16M User's Manual – Page 92