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Sera™ Automated ABR
Prepare the equipment
- Turn on SeraTM by pressing the home/power button
- Select a new or existing patient on the device or use the Quick Test option.
- Select the ABR test protocol from the list.
- Select the ear for testing
- Pressing the Test button
starts the test.
Test environment
The ideal test environment is a quiet room where lights and other electronic equipment are turned off.
Prepare the baby
| Patient state |
The baby should be sleeping or in a quiet and relaxed state. Sucking, blinking, crying or movement may affect testing. |
| Skin preparation |
If the baby’s skin is oily or covered in vernix, the electrode placement sites should be cleaned prior to placing the electrodes. |
| Place electrodes |
Place surface electrodes using the specified test montage for the selected protocol (mastoid or nape).
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| Connect cables |
Connect the cables from the preamplifier to the respective surface electrodes.
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Place transducer
Place the probe or inset earphones in the baby’s ear/s or place the EarCups around the baby’s ears.
Run test
Press the Test button
Impedance check
An impedance check will begin. Impedances are indicated by the green/amber dots on the montage picture as well as in numerical format on the screen.
When a dot is amber, it means the impedance is poor (> 40kΩ) for the indicated electrode. Check that the surface electrode and cables are connected correctly. It may be necessary to re-clean the skin or use a conductive gel with the surface electrodes to achieve an acceptable impedance. Testing cannot begin until impedance indictors are green (< 40kΩ).
Results
| PASS result | REFER result |
INCOMPLETE result |
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When the pass criteria for the test is reached, a  is displayed in green above the measurement, indicating the test has PASSED. |
When the pass criteria for the test is not reached within the measurement time, |
If the test is stopped before a PASS or REFER is generated by the system,  is displayed above the measurement indicating that the test is INCOMPLETE. |
is displayed in amber above the measurement, indicating the test is a REFER.