Value of Imaging in Cochlear Implantation Patients | ||||
| The Egyptian Journal of Hospital Medicine | ||||
| Article 135, Volume 99, Issue 1, April 2025, Page 2326-2332 PDF (350.54 K) | ||||
| DOI: 10.21608/ejhm.2025.433382 | ||||
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| Abstract | ||||
| Background: Cochlear implantation (CI) is an established therapeutic intervention for patients presenting with sensorineural hearing loss of severe degree (70–90 dB HL) and profound degree (> 90 dB HL), facilitating auditory rehabilitation. Preoperative cochlear imaging is critical for identifying the etiology, guiding device selection, determining the appropriate side for implantation, and optimizing surgical timing. This study seeks to evaluate the relationship between radiological evaluations and intraoperative observations in patients undergoing cochlear implantation. Subjects and methods: This study included 50 participants enrolled in the CI program who underwent CI surgery. Results: Radiological evaluation of the facial nerve showed anterior displacement in 3 patients (6%), with the remaining 47 patients (94%) demonstrating normal anatomical positioning. In contrast, intraoperative findings revealed anterior displacement in 4 patients (8%), lateral displacement in 6 patients (12%), and normal positioning in 40 patients (80%). Imaging accurately predicted the facial nerve course in 41 cases (82%), while it was inconclusive or incorrect in 9 cases (18%). Conclusions: CT offers high-resolution imaging of temporal bone microanatomy, mastoid air cell system pneumatization, and cochlear lumen patency. However, it has limitations in assessing neural structures, intracochlear fluid, or fibrosis within the inner ear. In contrast, magnetic resonance imaging offers superior visualization of the inner auditory canal nerves, retrocochlear pathologies, and membranous changes within the inner ear. Despite its advantages, MRI provides limited information on bony structures and is associated with higher costs. | ||||
| Keywords | ||||
| Cochlear implant; Semicircular canal; Internal carotid artery; Cerebrospinal fluid | ||||
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