Multi Curves
In Version 4.x, a new feature has been added as default called “Multi
Curves”; this function can be (de)selected by pressing
Setup
,
More
and
then
Softkey 1
. In addition, the default duration (
x
-axis) has been ex-
tended to 24 seconds. Multiple reflexes can be obtained at different lev-
els for each frequency, and each reflex curve can be individually erased
by means of the
Marker Function
(§5.1.6).
If the default has been modified using the ZODICON™ software, the fol-
lowing default settings may differ from those indicated in this section:
stimulus frequency and level, choice of ear, graph/meter, Ipsi/Contra, x-
axis scale, pre-stimulus delay time, and post-stimulus display time.
Tone Switch
The test is started by pressing the
Tone Switch
, and terminated by re-
leasing it. When performing “Multi Curves”, a stimulus is presented
each time you press and hold down the
Tone Switch
.
Softkey 1
Press
Softkey 1
to set the desired stimulus type (500, 1000, 2000, 4000 Hz
tone or White Noise—note that White Noise is only available if Contra
has already been selected).
Multi Curves
: Note that all reflexes made at each frequency are retained
in memory until a new patient is selected!
Softkey 2
Softkey 2
changes the display from graphic to analog meter format.
Softkey 3
Softkey 3
increases the stimulus Sound Pressure Level, in increments of
5 dB (increments of 1, 2 and 10 dB are available via
Setup
); alternatively,
use the
Rotary Knob
to increase or reduce SPL (HL). Range of 50 to 100
dB SPL (HL) may be extended by pressing the
Ext. Range
button to 115
dB (120 dB in Contra).
Softkey 4
Softkey 4
allows the selection of either Ipsi or Contra.
Softkey 5
Pressing
Softkey 5
displays the pump position graphically at the top of
the screen and, when
Softkey 5
is held down, the
Rotary Knob
may be
used to adjust the pressure. In analog meter format, the right-hand me-
ter displays Volume instead of Compliance while
Softkey 5
is held
down.
Operation Manual
41
GN Otometrics
MANUAL MODE
Chap. 4
ZODIAC 901 Middle-Ear Analyzer
REFLEX TESTING
4.2
Fig.4.15
Reflex Manual
