Assessment of electrostimulation in children supplied with cochlear implants

Area of Science:

• Audiology
• Biomedical Engineering
• Neuroscience

Background:

• Objective electrostimulation assessment is crucial for pediatric cochlear implant (CI) users.
• Current methods may rely on the integrity of the implant's electronic circuitry.

Purpose of the Study:

• To present an optimized, rapid, objective test for intraoperative and post-operative electrostimulation assessment in children with CIs.
• To develop a method independent of the stimulating electronic circuitry.

Main Methods:

• Utilized a synchronized sampling technique to measure electrical far-field potentials from scalp surface electrodes.
• Designed the setup for the COMBI40 multichannel CI.
• Procedure involves analyzing signal time course and input-output functions.

Main Results:

• The developed procedure allows for a straightforward judgment of the cochlear implant's electrical performance in situ.
• The assessment reflects the input delivered to the auditory nerve.
• Short test duration is achieved for both intraoperative and post-operative applications.

Conclusions:

• This objective test provides a reliable method for evaluating cochlear implant electrostimulation in children.
• The technique offers valuable insights into the auditory nerve's response to electrical stimulation.