Performing An Ovemp Measurement - Interacoustics Eclipse Additional Information

Eclipse Additional Information

5.12 Performing an oVEMP measurement

1. Choose one of the oVEMP protocols from the dropdown menu:
2. Select test side (Right or Left)
3. Choose intensity – starting intensity is normally ≥95 dBnHL.
4. Instruct the patient to look/gaze upwards at the target on the wall and hold their gaze.
5. Hit the start button and ensure that the patient is holding their gaze on the target.
The oVEMP recordings should show reproducible components around 10 and 15ms (N1 and P1), as
seen in a healthy subject. If no oVEMP responses can be obtained it does not necessarily mean a
pathologic result.
Typically 100-200 sweeps are averaged per waveform. If no oVEMP waveforms are recorded try to
use a higher intensity and verify normal middle ear function. Also confirm the correct montage has
been used and that the patient has followed the test instructions correctly.
oVEMPs are normally recorded at a high intensity level and may also be recorded down to threshold.
6. To mark a waveform make sure that you have selected the waveform you would like to mark. Right
click or the curve, and then choose the correct marker. Drag your mouse to the correct area and
click. You can also choose 1-4 on the keyboard to bring up the appropriate marker and use Enter to
place it.
7. EMG Scaling The default protocol is setup to scale the curves automatically. Some prefer to scale
after the recordings are completed. After the recording is complete, you can right click on the wave-
form and choose EMG Scaling.
8. Set VEMP partner: After collection, choose a left or right ear by double clicking the waveform han-
dle. Next, right click the waveform handle of the opposite ear and select Set as VEMP Partner.
These selected waveforms will be used in the Asymmetry Calculation.
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