Sunday, March 6, 2022

Electrically evoked auditory brainstem responses in deaf patients with Mondini malformation during cochlear implantation

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Eur Arch Otorhinolaryngol. 2022 Mar 5. doi: 10.1007/s00405-022-07307-9. Online ahead of print.

ABSTRACT

PURPOSE: To investigate the auditory pathway functions in deaf patients with Mondini malformation using the electrically evoked auditory brainstem response (EABR) during cochlear implantation (CI).

METHODS: A total of 58 patients with severe to profound sensorineural hearing loss (SNHL) were included in this study. Of these patients, 27 cases had Mondini malformation and 31 control cases had no inner ear malformations (IEMs). Intraoperative EABRs evoked by electrical stimulation at the round window niche (RWN) and round window membrane (RWM) were recorded.

RESULTS: Patients with Mondini malformation showed significantly lower EABR extraction rates than those with no IEMs did. However, for patients who showed EABRs, no significant difference in EABR thresholds, wave III (eIII) latencies, wave V (eV) latencies or eIII-eV la tency intervals was found between two groups.

CONCLUSION: The physiological functions of the peripheral auditory system in patients with Mondini malformation may divide into opposite extremes, as revealed by a robust EABR and the absence of the EABR, respectively. The auditory conduction function should be objectively and individually evaluated for patients with Mondini malformation by the EABR.

PMID:35247096 | DOI:10.1007/s00405-022-07307-9

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