Maico easyScreen, Руководство по эксплуатации

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Operation Manual easyScreen
8508935 Rev. 4 73 04/04/2019
If these troubleshooting suggestions do not resolve the problem you are experiencing
with your easyScreen device, allowing you to pass a screening using the Pass-
Checker, contact your local MAICO representative for assistance. It is recommended
that you keep replacement cables and accessories for your easyScreen available to
perform these troubleshooting procedures (see Table 21).
Table 21 Descriptions Replacement Parts
DESCRIPTIONS
Insert earphone tubes & adapters for EarCups
TM
(around the ear)
Insert earphone tubes & adapters for eartip (in-the-ear)
Electrode lead wires (black, yellow, white)
Preamplifier cable
5.17 Infant Ear Simulator (Optional Use for OAE Probe Testing)
The performance of the probe is critical for acquiring accurate results so that newborns
with possible cochlear hearing loss are not missed. To ensure that your device is
performing accurately, regular testing of the probe is essential.
Until now, the only method available to assess the probe was to perform a test in a
hard-walled cavity. It is well known that such a cavity does not reflect the properties of
an infant ear. Testing this way can produce false responses due to the resonance
characteristics of the hard-walled cavity, making it difficult to assess how accurately
the probe will perform in a real infant ear.
Figure 93
With the Infant Ear Simulator (Figure 93) it is possible to
test your OAE probe in a cavity specifically designed to
mimic the acoustic absorbance properties of a real infant
ear including the ear canal and middle ear.
Figure 94
Figure 94 shows how accurately the Infant
Ear
Simulator mimics the acoustic
absorbance of an infant ear based on data
from several published studies.
The shaded area displays the range from all
of the referenced studies.
The blue line at the bottom of the graph
shows how poorly a standard cavity
simulates an infant ear.
Using the Infant Ear Simulator, it is possible to perform an OAE probe quality check in
a realistic test cavity. Use the Infant Ear Simulator as follows:
1. Attach a clean disposable eartip of the smallest size to your OAE probe.
2. Insert the probe with eartip into the Infant Ear Simulator.
3. Perform a standard OAE screening.
4. The screening outcome should be a Refer.
5. If the screening outcome is a Pass, contact your distributor to replace or repair your probe.