Operating Instructions MI 34 / MI 34 H
GEBAmi34e.11a.docx
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850 232/14 08/11
Figure 20 Display Tympa Reflex
(ready for measurement)
Status
READY
Ear Volume
Compliance
Pressure
Gradient
Impedance
Ipsi
Right
ml
3
2
1
0
-600
-300
300 daPa
1
500 Hz I
4
4000 Hz I
3
2000 Hz I
2
1000 Hz I
AUTO
dB
Pressure
80
80
80
80
was set when the reflex occurred is called reflex threshold and is shown in
dBHL (dB hearing loss).
6.2 Training the test person
In addition to the general introduction described in chapter 4.2 you should
explain to the test person that loud test sounds will occur during the reflex
measurement. It is very important that the patient does not move his head
at all because a reflex can be registered already with a change of
compliance of 0.05 ml.
6.3 Preparing the ipsilateral measurement
The LCD display shows the empty Tympanogram for the right ear and the
control light
¹
of the probe lights red.
If you want to measure the left
ear change the side by pressing
the
L/R
-key
Ä
or the probe
button
·
. Then the selected
test ear shown in the middle of
the top of the LCD display
Ç
will change from
Right
to
Left
and the control light
¹
of
the probe lights blue.
Switch the reflex measurement
on by pressing the
REFLEX
-key
Ä
. The word Ipsi must appear
at the right top of the display
Ç
. The sound stimuli for the reflex measurement are reproduced by the
receiver integrated in the probe.
Set the desired volume level with the Down-key
Ì
respectively the Up-key
Î
. On the LCD display
Ç
below the reflex boxes at the bottom the selected
level in dB (in example figure 20, 80 dB) appears. The “I” indicates that an
ipsilateral test is selected. You can choose between the fixed levels 70, 75,
80, 85, 90, 95 and 100 dBHL and AUTO with a starting level of 70 or 80
dBHL. If you choose AUTO the MI 34 starts with the lowest level 70 dBHL or
80 dBHL and increases the level automatically until a reflex is registered or
the maximum value is reached. You can choose your individual starting
