otometrics Madsen ZODIAC 901, Руководство пользователя

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A closed Eustachian Tube will exhibit the same, positive MEP in both
sweeps. A patulous (spread) Eustachian Tube will exhibit an MEP close
to zero for both sweeps, and probably a pair of broad, irregular tym-
panograms as well.
This test is not included in Version 2. x of the ZODIAC 901.
Softkey 4 The Intact Eardrum test is included on the Tymp. intermediate menu.
Press
Tymp.
to obtain this menu, and then press
Softkey 4
to access the
Intact display. The menu functions and Setup parameters are in other re-
spects similar to Tymp. Sweep (§4.1.2).
Measurement Setup parameters available for the Intact Eardrum test are
the same as for Tymp. Auto Sweep (page 35).
Alt. Select
The
Alt. Select
pushkey allows you to use the Smooth facility to opti-
mize the curves (see Fig.4.10 below and refer to §4.1.35.1.2 for further de-
tails re this function). Just press
Softkey 2 from the Alt. Select sub-menu.
4.1.4 ETF-P, PERFORATED EARDRUM
In Advanced Mode, the Eustachian Tube Function (ETF-P) test may be
performed to test the functioning of the Eustachian Tube in the presence
of a perforated eardrum, for example in cases where a pressure differen-
tial has been relieved by surgical perforation of the eardrum.
Operation Manual 37
GN Otometrics MANUAL MODE Chap. 4
ZODIAC 901 Middle-Ear Analyzer
TYMPANOMETRY
4.1
Fig.4.9
As in Fig.4.11 above, but after
using the Smooth facility
Fig.4.10
Intact Eardrum, Example of
Normal Eustachian Tube
Function