Increasing the reliability of real-time electrocochleography during cochlear implantation: a standardized guideline.

Schuerch, K; Waser, M; Mantokoudis, G; Anschuetz, Lukas; Caversaccio, M; Wimmer, W; Weder, S (2022). Increasing the reliability of real-time electrocochleography during cochlear implantation: a standardized guideline. European archives of oto-rhino-laryngology, 279(10), pp. 4655-4665. Springer 10.1007/s00405-021-07204-7

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PURPOSE

Electrocochleography (ECochG) measures electrical potentials generated by the inner ear in response to acoustic stimulation. Real-time (rt) recordings are increasingly used during cochlear implant (CI) surgeries to monitor the inner ear function. However, the performance of rt-ECochG is a delicate measurement procedure involving several pitfalls, which lead to inaccurate or invalid signal recordings in up to 20%. In order to use the technique routinely in CI candidates, an improvement in measurement reliability must be achieved.

METHODS

In our prospective study, we systematically investigated potential pitfalls and error sources during rt-ECochG recordings. We performed experiments (i) on a head and torso simulator, (ii) on a whole-head cadaver specimen, (iii) as well as in vivo during rt-ECochG recordings in CI recipients. After analyzing experiments i-iii, a standardized measurement procedure was developed. We followed this guideline in 10 CI recipients to test the measurement reliability.

RESULTS

Besides improper installation, surgical and patient-specific factors influenced the measured signal. In particular, the unattenuated presentation of the acoustic stimulus was of importance. We summarized our findings in a standardized guideline. Following this guideline, we measured successful intraoperative ECochG recordings in 9/10 patients.

CONCLUSIONS

Our error analysis improved the understanding of successful rt-ECochG measurements. When following our proposed guideline, we achieved more reliable intraoperative ECochG recordings.

Item Type:

 Journal Article (Original Article)

Division/Institute:

 04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Hearing Research Laboratory
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research

UniBE Contributor:

 Schürch, Klaus, Waser, Manuel Nicola, Mantokoudis, Georgios, Anschütz, Lukas Peter, Caversaccio, Marco, Wimmer, Wilhelm, Weder, Stefan Andreas

Subjects:

 600 Technology > 610 Medicine & health
500 Science > 570 Life sciences; biology

ISSN:

 1434-4726

Publisher:

 Springer

Language:

 English

Submitter:

 Stefan Weder

Date Deposited:

 12 Jan 2023 10:00

Last Modified:

 12 Jan 2023 23:27

Publisher DOI:

 10.1007/s00405-021-07204-7

PubMed ID:

 35048175

Uncontrolled Keywords:

 Cochlear implantation Hearing preservation Measurement errors Real-time electrocochleography Standardized measurement guideline

BORIS DOI:

 10.48350/176633

URI:

 https://boris.unibe.ch/id/eprint/176633

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