Mapping Cochlear Duct Length to Electrically Evoked Compound Action Potentials in Cochlear Implantation
| Autor: | Nora M Weiss, Soenke Langner, Adele Lüsebrink, Robert Mlynski, Tobias Oberhoffner |
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| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Action Potentials Cochlear duct Audiology Cochlear implant otorhinolaryngologic diseases Humans Medicine Cochlear implantation Cochlear Nerve Evoked Potentials Cochlea Retrospective Studies business.industry Outcome measures Mean age Retrospective cohort study Cochlear Duct Middle Aged Cochlear Implantation Electric Stimulation Sensory Systems Confidence interval Cochlear Implants medicine.anatomical_structure Otorhinolaryngology Evoked Potentials Auditory Neurology (clinical) business |
| Zdroj: | Otology & Neurotology. 42:e254-e260 |
| ISSN: | 1537-4505 1531-7129 |
| Popis: | OBJECTIVE Objective measurements may assist in indicating cochlear implants and in predicting outcomes of cochlear implantation surgery. Using electrically evoked compound action potentials (ECAP), information about the function of the auditory nerve can be obtained by analyzing responses to electrical stimulation transmitted and derived by the recording electrode. The aim of this study was to determine whether ECAP characteristics differ depending on the stimulated intracochlear region and the size of the cochlea. STUDY DESIGN Retrospective cohort study. SETTING University Medical center, tertiary academic referral center. PATIENTS Patients undergoing cochlear implant surgery between 2015 and 2018. INTERVENTION Cochlear implantation with FLEXsoft electrode arrays (length 31.5 mm, 12 stimulating channels). MAIN OUTCOME MEASURES The cochlear duct length (CDL) and the cochlear coverage (CC) were measured using a new computed tomography-based software and correlated to the postoperative speech performance. Additionally, ECAP were measured and associated to the CDL. RESULTS A total of 59 ears of 53 cochlear implant users with a mean age of 63.6 (SD 14.9) years were included. The mean estimated CDL was 35.0 (SD 2.2) mm. The mean CC was 90.3% (SD 5.5%). A total of 4,873 ECAP were measured. A statistically significant, moderate, negative correlation between the ECAP slope and the site of stimulation was found (r = -0.29, 95% confidence interval: -0.32 to -0.27, p |
| Databáze: | OpenAIRE |
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