Making An Abr Threshold Recording; Electrode Montage; Abr Threshold Stimuli - Interacoustics Eclipse Instructions For Use Manual

3.6

Making an ABR threshold recording

ABR Threshold recording are used to determine the threshold of individuals that cannot participate in a
traditional behavioural audiometry.
Prior to testing make sure the patient is relaxed. You can monitor this by watching the EEG Window on the top
right of the recording window.

3.6.1 Electrode montage

ABR threshold testing is traditionally used to help determine the degree of hearing loss in pediatric or difficult
to test populations. A typical montage for an ABR threshold recording is:
RED Right mastoid or ear lobe (reference or inverting)
BLUE Left mastoid or earlobe (reference or inverting)
WHITE Vertex or high forehead (active or non-inverting)
BLACK Ground at cheek or low forehead - distance of few cm to WHITE electrode must be observed.

3.6.2 ABR threshold stimuli

Typically the ABR Threshold recording is started at 45dB nHL and decision is made to increase or lower the
stimuli intensity.
Available stimuli include:
CE-Chirp and CE-Chirp
• ®
NB CE-Chirp
• ®
Tone bursts 250Hz – 4kHz
•
Click
•
• Custom WAV file (when Research Module license is enabled)
D-0120578-C – 2019/11
Eclipse – Instructions for Use - US
LS
®
and NB CE-Chirp LS 500Hz, 1kHz, 2kHz and 4kHz
®
Page 44