Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants
AimThis study aimed to compare the effectiveness of auditory brainstem response (ABR) and extracochlear electrocochleography (ECochG) in objectively evaluating the coupling efficiency of floating mass transducer (FMT) placement during active middle ear implant (AMEI) surgery.MethodsWe enrolled 15 pa...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Neurology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fneur.2023.1231403/full |
| _version_ | 1797691112956100608 |
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| author | Tom Gawliczek Georgios Mantokoudis Lukas Anschuetz Marco D. Caversaccio Marco D. Caversaccio Stefan Weder |
| author_facet | Tom Gawliczek Georgios Mantokoudis Lukas Anschuetz Marco D. Caversaccio Marco D. Caversaccio Stefan Weder |
| author_sort | Tom Gawliczek |
| collection | DOAJ |
| description | AimThis study aimed to compare the effectiveness of auditory brainstem response (ABR) and extracochlear electrocochleography (ECochG) in objectively evaluating the coupling efficiency of floating mass transducer (FMT) placement during active middle ear implant (AMEI) surgery.MethodsWe enrolled 15 patients (mean age 58.5 ± 19.4 years) with mixed hearing loss who underwent AMEI implantation (seven ossicular chain and eight round window couplings). Before the surgical procedure, an audiogram was performed. We utilized a clinical measurement system to stimulate and record intraoperative ABR and ECochG recordings. The coupling efficiency of the VSB was evaluated through ECochG and ABR threshold measurements. Postoperatively, we conducted an audiogram and a vibrogram.ResultsIn all 15 patients, ABR threshold testing successfully determined intraoperative coupling efficiency, while ECochG was successful in only eight patients. In our cohort, ABR measurements were more practical, consistent, and robust than ECochG measurements. Coupling efficiency, calculated as the difference between vibrogram thresholds and postoperative bone conduction thresholds, was found to be more accurately predicted by ABR measurements (p = 0.016, R2 = 0.37) than ECochG measurements (p = 0.761, R2 = 0.02). We also found a non-significant trend toward better results with ossicular chain coupling compared to round window coupling.ConclusionOur findings suggest that ABR measurements are more practical, robust, and consistent than ECochG measurements for determining coupling efficiency during FMT placement surgery. The use of ABR measurements can help to identify the optimal FMT placement, especially with round window coupling. Finally, we offer normative data for both techniques, which can aid other clinical centers in using intraoperative monitoring for AMEI placement. |
| first_indexed | 2024-03-12T02:09:41Z |
| format | Article |
| id | doaj.art-f1e35503f6534aca9069254fdfec5fd7 |
| institution | Directory Open Access Journal |
| issn | 1664-2295 |
| language | English |
| last_indexed | 2024-03-12T02:09:41Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neurology |
| spelling | doaj.art-f1e35503f6534aca9069254fdfec5fd72023-09-06T17:43:12ZengFrontiers Media S.A.Frontiers in Neurology1664-22952023-09-011410.3389/fneur.2023.12314031231403Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implantsTom Gawliczek0Georgios Mantokoudis1Lukas Anschuetz2Marco D. Caversaccio3Marco D. Caversaccio4Stefan Weder5Department of ENT, Head and Neck Surgery, Bern University Hospital, University of Bern, Bern, SwitzerlandDepartment of ENT, Head and Neck Surgery, Bern University Hospital, University of Bern, Bern, SwitzerlandDepartment of ENT, Head and Neck Surgery, Bern University Hospital, University of Bern, Bern, SwitzerlandDepartment of ENT, Head and Neck Surgery, Bern University Hospital, University of Bern, Bern, SwitzerlandHearing Research Laboratory, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, SwitzerlandDepartment of ENT, Head and Neck Surgery, Bern University Hospital, University of Bern, Bern, SwitzerlandAimThis study aimed to compare the effectiveness of auditory brainstem response (ABR) and extracochlear electrocochleography (ECochG) in objectively evaluating the coupling efficiency of floating mass transducer (FMT) placement during active middle ear implant (AMEI) surgery.MethodsWe enrolled 15 patients (mean age 58.5 ± 19.4 years) with mixed hearing loss who underwent AMEI implantation (seven ossicular chain and eight round window couplings). Before the surgical procedure, an audiogram was performed. We utilized a clinical measurement system to stimulate and record intraoperative ABR and ECochG recordings. The coupling efficiency of the VSB was evaluated through ECochG and ABR threshold measurements. Postoperatively, we conducted an audiogram and a vibrogram.ResultsIn all 15 patients, ABR threshold testing successfully determined intraoperative coupling efficiency, while ECochG was successful in only eight patients. In our cohort, ABR measurements were more practical, consistent, and robust than ECochG measurements. Coupling efficiency, calculated as the difference between vibrogram thresholds and postoperative bone conduction thresholds, was found to be more accurately predicted by ABR measurements (p = 0.016, R2 = 0.37) than ECochG measurements (p = 0.761, R2 = 0.02). We also found a non-significant trend toward better results with ossicular chain coupling compared to round window coupling.ConclusionOur findings suggest that ABR measurements are more practical, robust, and consistent than ECochG measurements for determining coupling efficiency during FMT placement surgery. The use of ABR measurements can help to identify the optimal FMT placement, especially with round window coupling. Finally, we offer normative data for both techniques, which can aid other clinical centers in using intraoperative monitoring for AMEI placement.https://www.frontiersin.org/articles/10.3389/fneur.2023.1231403/fullactive middle ear implantcoupling efficiencyobjective measureselectrocochleographyauditory brainstem responseVibrant Soundbridge |
| spellingShingle | Tom Gawliczek Georgios Mantokoudis Lukas Anschuetz Marco D. Caversaccio Marco D. Caversaccio Stefan Weder Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants Frontiers in Neurology active middle ear implant coupling efficiency objective measures electrocochleography auditory brainstem response Vibrant Soundbridge |
| title | Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| title_full | Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| title_fullStr | Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| title_full_unstemmed | Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| title_short | Comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| title_sort | comparison of auditory brainstem response and electrocochleography to assess the coupling efficiency of active middle ear implants |
| topic | active middle ear implant coupling efficiency objective measures electrocochleography auditory brainstem response Vibrant Soundbridge |
| url | https://www.frontiersin.org/articles/10.3389/fneur.2023.1231403/full |
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