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Optimizing the efficiency of ECAP measurements due to interpolation
Jan Dambon1, Patrick Munder2, Alexander Mewes1
1Department of Otorhinolaryngology, Head and Neck Surgery, Audiology, University Hospital Schleswig-Holstein (UKSH), Kiel, Germany.
Acta Oto-Laryngologica
|January 8, 2024
Summary
Interpolating electrically evoked compound action potential (TECAP) thresholds can reduce cochlear implant fitting time. However, accuracy decreases, particularly at electrode array ends, suggesting a compromise of 11 points may be acceptable.
Area of Science:
- Audiology
- Neurosurgery
- Biomedical Engineering
Background:
- Electrically evoked compound action potential (TECAP) thresholds are crucial for cochlear implant fitting.
- Missing TECAP data points necessitate interpolation, potentially impacting fitting accuracy.
Purpose of the Study:
- To compare complete TECAP profiles with interpolated profiles using fewer electrode contacts.
- To evaluate the accuracy of interpolated TECAP data for cochlear implant fitting.
Main Methods:
- Retrospective analysis of data from 624 ears with Slim Modiolar or Contour Advance electrode arrays.
- Quantified deviation between complete measured TECAP profiles and those with interpolated data points.
Main Results:
- Interpolated TECAP profiles significantly differed from complete measured profiles, especially at basal and apical electrodes.
- Provided reference mean profiles for Slim Modiolar and Contour Advance electrodes.
Conclusions:
- Reducing measured TECAP electrodes impacts accuracy, particularly at array ends.
- A reduction to 11 non-equidistant data points may offer a clinically acceptable compromise between measurement time and accuracy.
