New Classification of Cochlear Hypoplasia Type Malformation: Relevance in Cochlear Implantation
| Autor: | Anandhan Dhanasingh, Roa Halawani |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Cochlear Diseases
medicine.medical_treatment Lumen (anatomy) Auditory canal 03 medical and health sciences 0302 clinical medicine Cochlear implant otorhinolaryngologic diseases medicine Electrode array Humans 030223 otorhinolaryngology Cochlear implantation Vestibular system business.industry General Medicine Anatomy lcsh:Otorhinolaryngology medicine.disease Cochlear Implantation lcsh:RF1-547 Semicircular Canals Hypoplasia Cochlea Otorhinolaryngology 3d image Preoperative Period Original Article Vestibule Labyrinth sense organs Tomography X-Ray Computed business 030217 neurology & neurosurgery |
| Zdroj: | Journal of International Advanced Otology, Vol 16, Iss 2, Pp 153-157 (2020) J Int Adv Otol |
| ISSN: | 2148-3817 1308-7649 |
| Popis: | Objectives This paper attempts to create a new classification type of cochlear hypoplasia (CH)-type malformation taking into consideration of vestibular section and internal auditory canal (IAC). Materials and methods Preoperative computed-tomography (CT) scans of cochlear implant (CI) candidates (N=31) from various clinics across the world with CH type malformation were taken for analysis. CT dataset were loaded into 3D-slicer freeware for three-dimensional (3D) segmentation of the inner-ear by capturing complete inner-ear structures from the entire dataset. Cochlear size in terms of diameter of available cochlear basal turn and length of cochlear lumen was measured from the dataset. In addition, structural connection between IAC and cochlear portions was scrutinized, which is highly relevant to the proposed CH classification in this study. Results CH group-I has the normal presence of IAC leading to cochlear and vestibular portions, whereas CH group-II is like CH group-I but with some degree of disruption in vestibular portion. In CH group-III, a disconnection between IAC and the cochlear portion irrespective of other features. Within all these three CH groups, the basal turn diameter varied between 3.1 mm and 9.6 mm, and the corresponding cochlear lumen length varied between 3 mm and 21 mm for the CI electrode array placement. Conclusion A new classification of CH mainly based on the IAC connecting the cochlear and vestibular portions is presented in this study. CI electrode array length could be selected based on the length of the cochlear lumen, which can be observed from the 3D image. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|