Admittance (Y) Recorder - Madsen zodiac Reference Manual

9 Testing with Zodiac Diagnostic or Clinical - Stand-Alone
C. Tympanometry results
The results table shows the results related to the currently selected curve:
• Probe
TPP offset
•
• ECV (Equivalent Ear Canal Volume)
SA
• (Static Peak Admittance), or
• TW/Ratio
Type
• (Jerger types A, As, Ad, B, C, D and E denote the shape of the 226 Hz curve). You can set the type to be
determined automatically, and you can subsequently change it manually, if necessary.
D. On-screen selections
Curve selection
Changing tympanogram curve type
Deleting a curve
9.9

Admittance (Y) Recorder

Admittance (Y) Recorder is a functionality where you can record the admittance either without stimulus or with any
external stimulus. The functionality can be useful both for investigative purposes and troubleshooting in conjunction with
unstable acoustic reflex traces.
Admittance (Y) Recorder is useful for several purposes such as:
• Reflex testing of the stapedius muscle
– external electrical stimulation with cochlear implants
– tactile stimulation
• Patulous Eustachian tube testing
Admittance variations in synchrony with the patient's breathing cycle resulting from insufficient closing of the Eus-
tachian tube
• Vascular artefacts
Admittance variations in synchrony with the patient's pulse. This phenomenon can be observed in some cases
involving superficial blood vessels that influence the probe or the tympanic membrane. The condition is sometimes
observed as a pulsatile objective tinnitus. It may indicate the presence of a Glomus tumor.
Physiological conditions
• Variations that are in synchrony with the patient's pulse:
In some patients, superficial blood vessels may influence the measurement. Try to place the probe at a different depth
68
(the probe tone in Hz)
(Tympanometric Peak Pressure)
SC
(Tympanometric Width/Tympanometric Ratio). Describes the steepness of the curve.
Press the
the Reflex Screening and Tympanometry result tables.
Press the
Select the curve you wish to delete, and press the
To replace a single measurement, delete a curve and adjust the measurement
selections to redo the single measurement.
(Static Peak Compliance) when volume equivalent units are used
Previous Curve or
Change Type
button until the desired tympanogram type is shown.
Next Curve softbutton to select the desired curve in
Delete
Otometrics - MADSEN Zodiac
button.