Otocheck ABR
User Manual
105
Quality checks
13.3
ABR cavity test
ABR cavity tests should be run weekly to ensure that the Otocheck is
working correctly.
Attach the probe snaps to the top of the cable tester as illustrated on the
previous page then press
OK
.
Follow the instructions in
Probe test
for inserting the probe into the test
cavity (two cavities are required, one to connect the electrode cables and
one to connect the probe). Select
OK
to start the ABR impedance test. All
impedances should show 0 kOhms.
Follow the Checkfit and Test screen sequences until the test stops. Please
refer to the
ABR Test
chapter for a detailed description of how to perform a
standard test.
Data collected during the cavity test is analysed against set Stop criteria.
If the result
No Valid ABR
is displayed and the circle is no more than 25
percent full when the test stops, the cavity test has passed.
If the result
Stopped Too Soon
,
Too Noisy
or
Poor Probe Fit
is achieved,
retest checking that the probe ear piece is firmly inserted into the test cavity
and that the noise conditions within the room are acceptable for a test to be
conducted. Continue to retest until either a
No Valid ABR
or a
Pass
result
is given.
If
Pass
is shown at the end of the test or if the circle for any band is more
than ¼ filled, save and retest making sure the ear piece has been firmly
pressed into the test cavity. Check the top of the test cavity and ensure it is
securely attached to the clear plastic part of the test cavity. If the resources
are available, repeat the test with a different test cavity and then with a
different probe. This will identify which component is responsible for the
problem.
Contact your dealer or Otodynamics for further advice.
Note:
If a signal is detected in the test cavity, ensure that five
successful cavity tests are performed on the Otoport before
returning it to use. Refit the probe in the cavity between each
test.