12 Testing with Zodiac Diagnostic or Clinical - PC-based
91
MADSEN Zodiac
12.6.2
Automated Reflex Threshold testing
In the following you will find the description for performing automated reflex threshold testing. The automated search for
the reflex threshold can be used both for individual reflex stimulus types and for preconfigured sequence testing.
The following procedure is an example describing how you search for a single stimulus type threshold.
Starting the test
1.
Select
Auto
testing.
2.
Ask the patient to sit very still and quiet during the test, without moving
head or jaw.
3.
Prepare the patient for the high sound levels in the test.
4.
Click either the
Ipsi
reflex or the
Contra
reflex button.
5.
Select the frequency that you wish to test: Click the applicable arrow but-
ton.
6.
Check the baseline graph to make sure that you have a stable test
condition before you start presenting the stimulus. The baseline
indicator should be as close to zero as possible. If needed, you can offset
the pressure to stabilize your measurements: Click the applicable arrow
button.
7.
Make sure that the settings options for the automated reflex sequence
have been selected. They include starting level, increment size,
verification procedure, and maximum level.
As opposed to a full measurement sequence, the automated threshold
search only includes a single, selected stimulus side and stimulus type.
8.
Click the
Start
button to start the automated threshold search. The
deflection curve is plotted in real time.
9.
If needed, repeat these steps until you have collected the desired
measurements for the stimulus sides and types you wish to test.
The baseline indicator starts
immediately when you insert the
probe in the ear of the patient.
The search will be paused before each stimulus above 100 dB HL, and you will
be prompted to continue.
Stopping the test
The test stops automatically, but can be stopped manually, if needed.
1.
Click the
Stop
button on the Control Panel or the
Start/Stop
button on the probe.
2.
The test is interrupted immediately.
Caution
•
If the patient shows discomfort during the test, stop the
test. The test will stop immediately. Already measured results are
stored.
Note
•
You will be warned about a high stimulus intensity level if you
reach the warning limit.
