Operating Instructions MA 53
Geba_MA53_e_13a.doc
21 851 430/3 11/11
Picture 20 MA 53 display with SISI
conditioning 5dB and presented increment
on the lower area of the LCD display
(see picture 20). The text “Answer
now” appears for approx. 1.5 seconds. During this period the patient may
respond. If he/she answers too early or too late the answer will not be
accepted by the MA 53.
The number of detected increments is
counted and shown on lower right area
of the display. Furthermore, the number
of presented increments is shown (see
picture 20).
When you are sure that the patient has understood the object of the test,
press the PULSE button
. The modulation level will be changed to 3 dB.
If the patient has understood this part of the test also, press the PULSE button
again. The modulation level will be reduced to 2 dB.
4.5.1.3.3 SISI Test
If the patient has understood the test up to
here, press the PULSE button
again to
start the SISI test.
The LCD-display indicates SISI test (see
picture 21) and the modulation level is
adjusted to 1 dB. Now 20 increments will
be presented to the patient.
You can delay the test for the time you press STIM bar
or
↔. This could be
helpful in determining if the patient
malingers.
The test will end automatically after 20
presented increments. The number of
detected increments is counted and indicated
as percentage of the presented increments
(see picture 22).
If you are sure that the result of the test is
consistent you can abort the test at any time
by pressing the PULSE button
. The result is
then indicated accordingly (picture 23).
Retrocochlear hearing impairment is
represented by low scores (< 25 %), cochlear defects by high scores (> 70 %).
Press any button leave the SISI test.
Picture 21 MA 53 display with SISI test
Picture 22 MA 53 display with SISI result
Picture 23 MA 53 display with aborted SISI
test
Содержание MA 53
Страница 2: ......