AT235 Additional Information Page 9
2.5 Eustachian Tube Function – Non-perforated Eardrum
The display of the Eustachian tube function test for the non-perforated eardrum shows graphs for the
selected ear in which the three tympanograms of the adapted Williams procedure are plotted. The Williams
procedure keeps the pressure between the first and second tympanogram at stop pressure, and between the
second and third tympanogram at the start pressure. In between all tympanograms, the original Williams
procedure involves asking the patient to swallow. In order to achieve a larger displacement in the
tympanograms, we advise asking the patient to perform a Valsalva maneuver after the first tympanogram,
then swallowing after the second tympanogram.
The following information is available during testing:
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