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Speech recognition and speech audiometry parameters in evaluation of aural rehabilitation progress in cochlear implant patients. Review paper

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Ryćko P., Rogowski M.
Polish Journal of Otolaryngology
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2024
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vol. 78
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issue 4
1-6
EN
Introduction: Speech audiometry is well established and frequently used test in audiology as well as in cochlear implant recipient’s performance evaluation. Expanding indications for cochlear implantation forces use of more refined methods of both assessment and prognosis of outcome of aural rehabilitation. Variability of speech intelligibility tests and materials require standardized protocol facilitating outcome comparison. Aim: Aim of this review paper is analysis of usage of speech audiometry and other speech intelligibility tests and its results reporting in patients with cochlear implant in Poland and in the World. Materials and methods: Protocols of many different domestic and foreign health centers where compared, showing many methodological differences. Selection of literature for analysis was made according to PRISMA algorithm recommendations. Twenty research papers were chosen for review process. Discussion: In many papers we found lack of data regarding methodology of performed tests. Many authors indicate difficulties in comparing results, especially if publication lacks basic technical information. Despite that if right method is applied, results can be compared. In literature only one level of material presentation in test is prevalent. Speech audiometry is significant in exploring connections between multiple pre-op and post-op prognostic aspects of cochlear implantation. Conclusions: Because of variability in presentation and reporting of CI patients outcomes, consensus is needed in area of system facilitating comparison of research results. This may provide simple solution for accurate analysis and choosing right set of data. Schematic of presentation of audiological data in authors health center was proposed as example.
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ECAP correlation with speech recognition performance – new predictory function in rehabilitation of cochlear implant recipients?

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Ryćko P., Rogowski M.
Polish Journal of Otolaryngology
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2025
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vol. 79
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issue 2
1-6
EN
Introduction: Despite well-established qualification criteria and pre-operation tests, there is still uncertainty about post-implantation performance in CI patients. One of the most interesting factors that affect the outcome is the survivability and function of cochlear nerve endings. ECAP (Evoked Compound Action Potential) is one of the tools that might be useful in the prediction of rehabilitation outcomes. Speech audiometry is one of the most commonly used and established performance tests. The study hypothesis is that there might be a correlation between ECAP values and speech audiometry results obtained over time. Aim: The aim was to check if changes within postop ECAP values correspond to changes in speech intelligibility. Materials and methods: The study was designed as a retrospective observational one. Data was evaluated on a selected group of patients, with no blinding or control group. The study group consisted of 25 adult cochlear implant recipients, all with Cochlear® devices, implanted at the Department of Otolaryngology of the Medical University of Bialystok, Poland, between 2016 and 2020. Data included ECAP measurements and speech audiometry results obtained during the first year of rehabilitation. The statistical analysis of the significance of data change over time and its correlation was performed. Results: Change of data over time was significant (P<0.05) for almost all data groups but it did not translates to the correlation of speech and ECAP. Conclusions: There is no statistically confirmed evidence suggesting that obtaining speech intelligibility is connected with change in ECAP values, which requires further research.
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