otometrics Madsen ZODIAC 901, Руководство пользователя

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After the measurements, the screen will look like the one shown in
Fig.4.16.
Softkey 2 The Softkeys and the Ext. Range button function just as described above
in §4.2.1, with the exception of Softkey 2 , which is used for starting and
stopping the test—there is no meter display in this operation mode. The
test may also be started by the pushbutton on the probe.
L/R Shift When starting to test the patient’s other ear, remember to register the
change-over on the ZODIAC 901, otherwise the data for the first ear will
be overwritten. To change to the other ear, press
Alt. Select
and then
Softkey 4 .
Setup Parameters Setup parameters available in Screening Reflex Mode (see also §5.2.2)
are:
Stimulus SPL (HL) increment: 1, 2, 5 or 10 dB
Y -Axis: scaling: Auto, 75, 150, 225, 300, 375
m
l
Speed: slow or fast
Y -Axis: Auto, negative, positive, positive/negative
Use Middle Ear Pressure: on or off*
Leak Detect On/Off.
*In Version 3. x and later, this function is called Press.C. (Pressure Con-
trol) and is extended to: Manual, Auto, MEP +0, +5, +10, +15, +20, +25,
–25, –20, –15, –10, –5 daPa.
4.2.3 DECAY
Decay A weak Stapedius Muscle is unable to sustain tension in the eardrum
during the prolonged application of a sound loud enough to provoke
Reflex. This test measures a reflex on a 12-second time scale (baseline 1
sec, stimulus 10 sec, and 1 second of recovery time, unless these have
been modified using the ZODICON
TM
software) and can be used to rec-
ord the decay caused by a weakening Stapedius Muscle.
Operation Manual 43
GN Otometrics MANUAL MODE Chap. 4
ZODIAC 901 Middle-Ear Analyzer
REFLEX TESTING
4.2
Fig.4.16
Reflex Screening