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- Title
The suspension of the basilar membrane in the hook region of the human cochlea: implications for trajectory planning in cochlear implantation.
- Authors
Schart-Morén, N.; Agrawal, S.; Ladak, H.; Li, H.; Rask-Andersen, H.
- Abstract
Objective: The anatomy of the human basal cochlea, including the round window (RW), is highly variable. It also includes the architecture of the basilar membrane (BM) and its suspension, which can challenge structural preservation during cochlear implantation (CI) surgery. Material and Methods: We used micro-CT and synchrotron- phase contrast imaging (SR-PCI) of an archival collection of micro-dissected and undissected macerated human temporal bones and an additional sixteen freshly fixed bones. Data were processed by volume-rendering software using bony and soft tissue algorithms. Anatomic variations and outcomes of different approaches during CI were investigated. Results: Micro-CT with 3D rendering displayed the RW and osseous spiral laminae, while synchrotron imaging allowed reproduction of the BM and its suspension around the RW membrane and lateral wall. Anterior (ACOs) and antero-inferior (AICOs) cochleostomies invariably damaged intra-cochlear tissue while inferior cochleostomies (ICOs) sporadically left structures unaffected. The RW trajectory was also examined. Conclusions: The 3D organization of the suspensory apparatus of the BM in the hook region can be reproduced using SR-PCI. The variable anatomy should be considered during CI surgery aimed at hearing and structural preservation.
- Subjects
BELGIUM; CONFERENCES &; conventions; BASILAR membrane; COCHLEA; COCHLEAR implants; ACOUSTIC stimulation
- Publication
Journal of Hearing Science, 2018, Vol 8, Issue 2, p275
- ISSN
2083-389X
- Publication type
Article