Radiological requirements for surgical planning in cochlear implant candidates

Mohamad Hasan Alam-Eldeen; Usama Mohamed Rashad; Al Hussein Awad Ali

doi:10.4103/ijri.IJRI_55_17

Indian Journal of Radiology and Imaging, Table of Contents

CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2017; 27(03): 274-281
DOI: 10.4103/ijri.IJRI_55_17

Neuroradiology & Head and Neck Imaging

Radiological requirements for surgical planning in cochlear implant candidates

Authors

Mohamad Hasan Alam-Eldeen

Department of Diagnostic Radiology, Sohag Faculty of Medicine, Sohag University, Sohag, Egypt
Usama Mohamed Rashad

Department of Otolaryngology, Sohag Faculty of Medicine, Sohag University, Sohag, Egypt
Al Hussein Awad Ali

Department of Otolaryngology, Sohag Faculty of Medicine, Sohag University, Sohag, Egypt

Abstract

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Abstract

Objective: This study is concerned with clarification of radiological findings that should be addressed and reported in patients listed for cochlear implant (CI) operation. These findings may force a surgeon to consider modifications of the surgical approach by a CI surgeon. Materials and Methods: The study was performed from January 2015 to January 2016. It included 50 patients with severe-to-profound sensorineural hearing loss who fulfilled the criteria for CI. Patients underwent CI surgery in the Department of Otolaryngology. All patients underwent preoperative computed tomography (CT) and magnetic resonance imaging (MRI) assessment in the Department of Diagnostic Radiology. Combined examination of the CT and MRI by the radiologist and the surgeon was advocated. Results: Many anatomical variants were observed regarding the pattern of mastoid pneumatization, position of middle cranial fossa dura, sigmoid sinus position jugular bulb position, and the size and position of the mastoid segment of facial nerve canal. Labyrinthitis ossificans was seen in 3 patients (6%), otospongiosis in 1 patient (2%), and dilated vestibular aqueduct and endolymphatic sac in 9 patients (18%). Conclusion: Cochlear implantation is a major treatment modality in patients with severe-to-profound sensorineural hearing loss. Radiological evaluation is integral in surgery planning.

Keywords

Cochlear implantation - computed tomography - magnetic resonance imaging - surgical considerations

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References

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