Madsen zodiac, Справочное руководство

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Procedure
All three result rows in the Tympanometry results table
will be used for this test.
1. Select the Tympanometry test screen.
2. Record a tympanogram.
3. Instruct the patient to perform a pressure equalization
maneuver.
4. Record a second tympanogram.
5. Compare the tympanograms from step 1 and 3 in the
multilayered tympanogram.
6. It may be useful to repeat the procedure using dif-
ferent techniques and maneuvers in a sequence of test-
ing to fully evaluate the functioning of the Eustachian
tube.
Note
•
You can also use Manual Tympanometry for ETF-I. In Manual Tympanometry you can facilitate the equal-
ization maneuvers by keeping the pressure between measurements.
9.5 Acoustic reflex testing
MADSEN Zodiac determines acoustic reflexes automatically using different stimulus levels.
Note
•
It is recommended that you perform a tympanometric test before making any acoustic reflex meas-
urement, and determine the acoustic reflex threshold before making a reflex decay measurement.
Note
•
If you have performed a tympanometric test, where the tympanogram is very steep (TW is less than 40
daPa), a TPP offset is automatically applied to stabilize the reflex measurement.
High intensity levels
Note
•
To avoid automatic testing being interrupted because of high stimulus intensity levels when reaching the
warning limits, it is recommended that you set the max. intensity to 100 dB HL. You can always supplement auto-
matic reflex measurements with manual testing, if needed.
58 Otometrics - MADSEN Zodiac
9 Testing with Zodiac Diagnostic or Clinical - Stand-Alone