Non-Invasive ECochG

Non-Invasive ECochG

Safety and comfort

The Integrity™ V500 System ECochG module is one of the most patient-centric systems on the market promoting safety and comfort through the use of non-invasive techniques.

Electrocochleography (ECochG) is an objective technique that records stimulus-evoked potential responses. It is particularly valuable in the assessment of adults requiring additional tests for Ménière’s disease or endolymphatic hydrops. In the pediatric population, the cochlear microphonic of ECochG can provide an indication of Auditory Neuropathy/ Dyssynchrony wherein the cochlea is intact, but the auditory nerve is damaged.

Clear ECochG recordings are obtained using gold foil ear tips, without the need to touch the tympanic membrane. Discomfort and risks of perforation are avoided. ECochG measurement can proceed safely, non-invasively, and comfortably.

Clinical Applications

• Assessment of hearing pathology associated with increased inner ear fluid pressure (Ménière’s disease, endolymphatic hydrops)
• Enhancement of wave I in ABR recording
• Enhancement of cochlear microphonic and the diagnosis of auditory neuropathy

How it Works

The VivoLink™ generates a click and the response of the auditory nerve is detected by the Amplitrode® which amplifies the difference between the gold foil ear electrode in the ear canal and an electrode placed on the opposite ear.

An ECochG evoked response is a very small magnitude of less than 1 µV, therefore a high stimulus intensity is required when recording a diagnostic ECochG. In addition, advanced noise filtering and amplification are essential to obtain clear recordings.

It is typically recommended that multiple waveforms using rarefaction, condensation, and alternating polarities be recorded. With most conventional systems, these must be collected as separate runs. With the Integrity V500 System, however, recordings can be collected in a single run by using the dual A, B buffers with alternating polarity. The availability of alternating split polarity helps to provide evidence of the cochlear microphonic.