Longitudinal study of hearing preservation and electrocochleography after cochlear implantation in adults

IF 1.8 4区医学 Q2 OTORHINOLARYNGOLOGY Brazilian Journal of Otorhinolaryngology Pub Date : 2025-03-26 DOI:10.1016/j.bjorl.2025.101584

Marianne Schleich , John J. Galvin III , Fabrice Micaletti , David Bakhos

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Abstract

Objectives

Electrocochleography (ECOG) is a composite objective measure of the cochlea and the cochlear nerve responses. The objectives of this study were to investigate the evolution of ECOG after cochlear implantation and compare them with audiometric thresholds over a 12-month period.

Methods

A prospective monocentric study was conducted in Advanced Bionics cochlear implant recipients. Audiometric thresholds were recorded preoperatively and at 1-, 3-, 6-, and 12-months post cochlear implantation; ECOGs were recorded perioperatively after the electrode array insertion and at 1-, 3-, 6-, and 12-months post cochlear implantation. Cochlear Microphonic (CM) responses were measured by an apical electrode of the cochlear implant. Postoperative behavioral and ECOG thresholds were compared using Pearson correlation analyses.

Results

A total of 17 patients were included. At 1-year, residual hearing (≤90 dB HL at 500 Hz) was preserved for 4 out of 17 patients. Significant correlations were observed between perioperative ECOG and preoperative audiometric thresholds (p = 0.008), and between ECOG and audiometric thresholds at 3-months postoperative (p = 0.002).

Conclusion

ECOG can reflect changes in cochlear responses during and after implantation and may help to predict deterioration of residual hearing.

Level of evidence

Level 3.

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成人人工耳蜗植入术后听力保护和耳电图纵向研究

目的：耳蜗电图（ECOG）是对耳蜗和耳蜗神经反应的综合客观测量。本研究的目的是研究人工耳蜗植入后ECOG的演变，并将其与12个月的听力学阈值进行比较。方法对先进仿生人工耳蜗受者进行前瞻性单中心研究。术前及人工耳蜗植入术后1、3、6、12个月记录听力学阈值；在植入电极阵列后围手术期和人工耳蜗植入后1、3、6、12个月分别记录脑电图。采用人工耳蜗顶端电极测量耳蜗麦克风（CM）反应。采用Pearson相关分析比较术后行为阈值和ECOG阈值。结果共纳入17例患者。1年后，17例患者中有4例保留了残余听力（500 Hz时≤90 dB HL）。围手术期ECOG与术前听力学阈值显著相关（p = 0.008），术后3个月ECOG与听力学阈值显著相关（p = 0.002）。结论ecog能反映人工耳蜗植入期间和植入后耳蜗反应的变化，有助于预测残余听力的恶化。证据等级：3级。

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来源期刊

Brazilian Journal of Otorhinolaryngology OTORHINOLARYNGOLOGY-

CiteScore

3.00

自引率

0.00%

发文量

205

审稿时长

4-8 weeks

期刊介绍： Brazilian Journal of Otorhinolaryngology publishes original contributions in otolaryngology and the associated areas (cranio-maxillo-facial surgery and phoniatrics). The aim of this journal is the national and international divulgation of the scientific production interesting to the otolaryngology, as well as the discussion, in editorials, of subjects of scientific, academic and professional relevance. The Brazilian Journal of Otorhinolaryngology is born from the Revista Brasileira de Otorrinolaringologia, of which it is the English version, created and indexed by MEDLINE in 2005. It is the official scientific publication of the Brazilian Association of Otolaryngology and Cervicofacial Surgery. Its abbreviated title is Braz J Otorhinolaryngol., which should be used in bibliographies, footnotes and bibliographical references and strips.