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PubMed · 9651612

New developments in cochlear implants.

S Peeters·L Van Immerseel·A Zarowski·V Houben·P Govaerts·E Offeciers
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Abstract

Essential to improve the performance with cochlear implants is a better control of the electrode-nerve interface. The long-term stability of the electrode characteristics has to be guaranteed. Most important herein is to have a low and stable electrical impedance and to prevent fibrosis. Results of electrode coating and fibrosis-inhibiting products are described. To assess the properties of the electrode-nerve interface such as stimulation threshold, spatial selectivity and channel interaction, the electrically evoked compound action potential is measured. The measurement paradigm and the first results are described. Models of auditory nerve response to electrical stimulation can be used as a tool for cochlear implant fitting. A simple model is proposed and its predictions are compared with measured responses.

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Cochlear ImplantationDeafnessEquipment DesignHumansProsthesis FittingVestibulocochlear NerveComparative StudyJournal ArticleResearch Support, Non-U.S. Gov't

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S Peeters, L Van Immerseel, A Zarowski, V Houben, P Govaerts, E Offeciers. 1998. New developments in cochlear implants.. https://pubmed.ncbi.nlm.nih.gov/9651612/

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PubMed1999

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Simultaneous Analog Stimulation (SAS)--Continuous Interleaved Sampler (CIS) pilot comparison study in Europe.

The recent availability of the enhanced bipolar electrode array in the CLARION Multi-Strategy Cochlear Implant has permitted clinicians to fit patients successfully with the Simultaneous Analog Stimulation (SAS) strategy by means of bipolar coupling. Out of 22 consecutively implanted subjects, 20 subjects could be fitted with both Continuous Interleaved Sampler (CIS) and SAS strategies. Their performance was evaluated up to 3 months postoperatively. Speech perception results, as well as the patient's preference for either CIS or SAS, were examined. It was found that half of the subjects selected SAS as their preferred strategy and that the use of a preferred strategy resulted in higher overall patient performance. Further analyses showed that those subjects preferring SAS had higher electrode impedance values and lower threshold and most comfortable loudness levels than subjects preferring CIS. We presume that these psychophysical findings are, in part, related to the position of the intracochlear electrode array. Specifically, SAS users may have a more modiolus-hugging electrode array position.

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