Introduction: Intracochlear electrocochleography (ECochG) can be used to measure the physiological responses of the cochlea and to objectively estimate hearing thresholds in cochlear implant (CI) recipients. A platform of electrophysiological measurements called the AIM System can be used intra and post-operatively for recording electrophysiological responses in patients with Advanced Bionics cochlear implants.
The study aims to describe intra and post-operative ECochG assessments in children with cochlear implants.
Method: Eleven children from three cochlear implant centers in Argentina participated in the study. The mean age of the subjects was 6 years and 3 months (range 2 to 15 years). Pre and post-operative evaluation included auditory thresholds, estimated by using conventional, condition play, and/or visual reinforcement audiometry. Intra and post-operative ECochG measurements were obtained using the Aim System. The most apical intracochlear electrode was used as the recording electrode. All patients had a full insertion of an Advanced Bionics cochlear implant with a mid-scalar or lateral wall electrode.
Results: Of the 11 participants, 8 presented recordable ECochG response during electrode insertion. For these subjects, the pre-operative hearing threshold at 250 and/or 500Hz was ≤ 80dB. The average insertion time was 204 seconds. Regarding post-operative evaluation, ECochG audiograms were correlated with behavioral audiograms. The mean hearing thresholds obtained post-operatively at 250, 500, 1k, 2k were respectively 86, 102, 109, and 114dB with behavioral evaluation and 100, 102, 101, and 106dB with ECochG-based estimation.
Conclusion: Intracochlear ECochG allowed intraoperative monitoring during CI insertion, as well as an objective way to estimate post-surgical hearing thresholds in children with CI. The data obtained by this objective measurement can assist in the audiological follow-up of the CI recipients.Introduction: Intracochlear electrocochleography (ECochG) can be used to measure the physiological responses of the cochlea and to objectively estimate hearing thresholds in cochlear implant (CI) recipients. A platform of electrophysiological measurements called the AIM System can be used intra and post-operatively for recording electrophysiological responses in patients with Advanced Bionics cochlear implants.
The study aims to describe intra and post-operative ECochG assessments in children with cochlear implants.
Method: Eleven children from three cochlear implant centers in Argentina participated in the study. The mean age of the subjects was 6 years and 3 months (range 2 to 15 years). Pre and post-operative evaluation included auditory thresholds, estimated by using conventional, condition play, and/or visual reinforcement audiometry. Intra and post-operative ECochG measurements were obtained using the Aim System. The most apical intracochlear electrode was used as the recording electrode. All patients had a full insertion of an Advanced Bionics cochlear implant with a mid-scalar or lateral wall electrode.
Results: Of the 11 participants, 8 presented recordable ECochG response during electrode insertion. For these subjects, the pre-operative hearing threshold at 250 and/or 500Hz was ≤ 80dB. The average insertion time was 204 seconds. Regarding post-operative evaluation, ECochG audiograms were correlated with behavioral audiograms. The mean hearing thresholds obtained post-operatively at 250, 500, 1k, 2k were respectively 86, 102, 109, and 114dB with behavioral evaluation and 100, 102, 101, and 106dB with ECochG-based estimation.
Conclusion: Intracochlear ECochG allowed intraoperative monitoring during CI insertion, as well as an objective way to estimate post-surgical hearing thresholds in children with CI. The data obtained by this objective measurement can assist in the audiological follow-up of the CI recipients.

**Introduction: **Intracochlear electrocochleography (ECochG) can be used to measure the physiological responses of the cochlea and to objectively estimate hearing thresholds in cochlear implant (CI) recipients. A platform of electrophysiological measurements called the AIM System can be used intra and post-operatively for recording electrophysiological responses in patients with Advanced Bionics cochlear implants.
The study aims to describe intra and post-operative ECochG assessments in children with cochlear implants.
**Method:** Eleven children from three cochlear implant centers in Argentina participated in the study. The mean age of the subjects was 6 years and 3 months (range 2 to 15 years). Pre and post-operative evaluation included auditory thresholds, estimated by using conventional, condition play, and/or visual reinforcement audiometry. Intra and post-operative ECochG measurements were obtained using the Aim System. The most apical intracochlear electrode was used as the recording electrode. All patients had a full insertion of an Advanced Bionics cochlear implant with a mid-scalar or lateral wall electrode.
**Results: **Of the 11 participants, 8 presented recordable ECochG response during electrode insertion. For these subjects, the pre-operative hearing threshold at 250 and/or 500Hz was ≤ 80dB. The average insertion time was 204 seconds. Regarding post-operative evaluation, ECochG audiograms were correlated with behavioral audiograms. The mean hearing thresholds obtained post-operatively at 250, 500, 1k, 2k were respectively 86, 102, 109, and 114dB with behavioral evaluation and 100, 102, 101, and 106dB with ECochG-based estimation.
**Conclusion:** Intracochlear ECochG allowed intraoperative monitoring during CI insertion, as well as an objective way to estimate post-surgical hearing thresholds in children with CI. The data obtained by this objective measurement can assist in the audiological follow-up of the CI recipients.**Introduction: **Intracochlear electrocochleography (ECochG) can be used to measure the physiological responses of the cochlea and to objectively estimate hearing thresholds in cochlear implant (CI) recipients. A platform of electrophysiological measurements called the AIM System can be used intra and post-operatively for recording electrophysiological responses in patients with Advanced Bionics cochlear implants.
The study aims to describe intra and post-operative ECochG assessments in children with cochlear implants.
**Method:** Eleven children from three cochlear implant centers in Argentina participated in the study. The mean age of the subjects was 6 years and 3 months (range 2 to 15 years). Pre and post-operative evaluation included auditory thresholds, estimated by using conventional, condition play, and/or visual reinforcement audiometry. Intra and post-operative ECochG measurements were obtained using the Aim System. The most apical intracochlear electrode was used as the recording electrode. All patients had a full insertion of an Advanced Bionics cochlear implant with a mid-scalar or lateral wall electrode.
**Results: **Of the 11 participants, 8 presented recordable ECochG response during electrode insertion. For these subjects, the pre-operative hearing threshold at 250 and/or 500Hz was ≤ 80dB. The average insertion time was 204 seconds. Regarding post-operative evaluation, ECochG audiograms were correlated with behavioral audiograms. The mean hearing thresholds obtained post-operatively at 250, 500, 1k, 2k were respectively 86, 102, 109, and 114dB with behavioral evaluation and 100, 102, 101, and 106dB with ECochG-based estimation.
**Conclusion:** Intracochlear ECochG allowed intraoperative monitoring during CI insertion, as well as an objective way to estimate post-surgical hearing thresholds in children with CI. The data obtained by this objective measurement can assist in the audiological follow-up of the CI recipients.

Intracochlear electrocochleography (ECochG) in children with cochlear implants.

It is with great pleasure and enthusiasm, that on behalf of the Cochlear Implant centers of the Radboud UMC in Nijmegen and Erasmus MC Sophia Children’s Hospital in Rotterdam to invite you to attend the 16th European Symposium on Pediatric Cochlear Implantation to Rotterdam, the Netherlands in 2023.

Yours sincerely, on behalf of the CI Centers at Radboud UMC and Erasmus MC,