Maico MI 24, Руководство по эксплуатации

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Operating Instructions MI 24, MI 24h
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5
How to create a tympanogram with high probe tone
In addition to the standard 226 Hz probe tone tympanometry, the MI 24h has a
higher frequency probe tone that can be selected by the user. A tympanogram
recorded using the high probe tone is generally better suited for screening newborns
and provides more accurate results for those subjects.
5.1 To select high probe tone frequency
When the instrument is switched on, it automatically powers-up in the standard
tympanometry mode. In order to choose tympanometry with high probe tone, hold
down the Reflex key for two seconds.
The screen for high probe tone tympanometry looks very similar to the normal
tympanometry mode, however the following differences will appear on the screen:

The scaling is now measured in mmho

The pre-selected frequency (1000 Hz) is displayed in the upper left hand side of the
screen
The tympanometry test with high probe tones is performed in the exact same way as
a normal tympanometry test.
It is possible to perform normal tympanometry and high probe tone tympanometry in
one test session and print the results for comparison. Now the next curve will be
drawn automatically. Press Print and a printout presenting both curves will appear.
When the first tympanometry curve has been drawn, press the Reflex key for two
seconds to switch to high probe tone tympanometry.
Note: It is not possible to perform reflexes on the basis of a high probe tone
tympanogram.