The Etf-P Screen - Madsen zodiac Reference Manual

An initial positive or negative air pressure is applied to the ear through the probe (positive pressure is recommended). Due
to the eardrum perforation, the pressure will be applied to both the ear canal and middle ear cavities. The patient is then
instructed to swallow some water, which typically causes a functioning Eustachian tube to open. Any pressure equalization
through the tube will show as a sudden pressure drop toward, but not necessarily reaching, atmospheric pressure (0 daPa).
This is repeated until the pressure is equalized or until the test is stopped. The pressures at which the tube opens and
closes are reported as test results.
Typically, an initial build-up of positive pressure will cause the Eustachian tube to open spontaneously. In order to avoid
premature spontaneous pressure equalization related to positive pressure build-up, the pump speed should be kept at a
maximum of 50 daPa/s.
Procedure
1. Record a tympanogram to confirm the perforation. The resulting tym-
panogram curve will be flat, and the ear canal volume will be abnormally
high because it includes the volume of the entire middle ear.
Tympanometry testing ► 88
See
2. Press the
3. Scroll to select the
4. Press the
5. If needed, use the dial to adjust the initial pressure.
6. Press the
probe control pad on the shoulder strap.
Positive pressure automatically builds up until the first opening of the Eus-
tachian tube or max. pressure is reached.
The time scale is 30 seconds.
7. Press the
pressure stabilizes (if the pressure stops increasing before the target pressure
has been reached).
8. Instruct the patient to perform the preferred equalizing method, for example
having a sip of water.
This ETF-P test result shows an example where the pressure changes throughout
the measurement as the Eustachian tube briefly opens and closes. The pattern
may differ depending on the patient.
9.10.1

The ETF-P screen

The ETF-P test screen in MADSEN Zodiac provides a simple view for quickly assessing the Eustachian tube function.
The ETF-P test result example shows how the pressure changes throughout the measurement as the Eustachian tube
briefly opens and closes.
One curve per ear is saved.
Otometrics - MADSEN Zodiac
.
Special
button.
ETF-P
test.
OK
soft-button.
Start/Stop
button on the device or the
Stop Pump
softbutton to manually stop the pump when the air
9 Testing with Zodiac Diagnostic or Clinical - Stand-Alone
Start/Stop
button on the
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