otometrics Madsen Midimate 602, Быстрое руководство

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MIDIMATE 602 & 622 Diagnostic Audiometers
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6.3 Stenger’s test
If, for instance, a patient falsely claims that his hearing is impaired in one ear, this
can be established by performing Stenger’s test. This test determines the air conduc-
tion threshold in the ear of the patient. Since Stenger’s test involves simultaneous
tone stimulus of both
Left
and
Right
ears, make sure that the patient is wearing
the headphones correctly, with the red phone on the right ear. To conduct the test, do
as follows:
1. Press Menu until the
Select Function
menu is displayed.
2. Press Softkey 3 ,
Special
.
3. Select
Stenger
from the
Select special Test
menu by pressing Softkey 3 .
4. Turn the Frequency wheel to select the desired test frequency.
5. Set the hearing level to 10 dB above threshold in the good ear and 10 dB below
threshold in the allegedly impaired ear. Use the Masking Level wheel for the
Right
ear.
6. Present the stimulus by pressing the Tone Switch .
7. A response from the patient indicates a negative Stenger result: the ear is im-
paired.
8. If the patient does not respond because he wrongly believes that the tone was
presented only to the allegedly impaired ear, a positive Stenger result is obtained:
the ear is not impaired.
9. Exit the test by pressing Menu .
6.4 The Rainville test
The Rainville test is used to determine the ipsilateral bone conduction threshold
without testing the other ear. It is a test of masked bone conduction in which thresh-
olds are established by air conduction with and without masking via bone conduc-
tion. To perform the test, do as follows:
1. Connect the patient response handswitch, the headphones, the B–71 Bone Con-
ductor, the optional monitor headset (or the optional monitor adaptor with talk-
over microphone and monitor loudspeaker), and the optional patient talkback
microphone.
2. Switch on the electric power supply.
3. Place the patient, facing away from the MIDIMATE 602/622, in a sound-cabin, if
available.
4. Place the right headphone on the ear to be tested, and the Bone Conductor on the
mastoid bone behind this ear.