Open Access3D Anatomy of the Cochlea for Cochlear Implant
Author(s) -
Tanioka Hisaya,
Kaga Kimitaka
Publication year - 2012
Publication title -
otolaryngology–head and neck surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.232
H-Index - 121
eISSN - 1097-6817
pISSN - 0194-5998
DOI - 10.1177/0194599812451426a227
Subject(s) - round window , cochlear duct , anatomy , cochlea , inner ear , cochlear implant , vestibule , temporal bone , basilar membrane , hook , cochlear implantation , medicine , computer science , vestibular system , radiology , audiology , dentistry
Objective This study aimed to create a 3‐dimensional anatomy of the round window to hook region to identify the optimal site for cochleostomy in cochlear implantation and other endocochlear surgical procedures. Method Ten normal ears were studied. To develop 3‐dimensional reconstructed inner ear image based on high‐resolution temporal bone images obtained by a spiral CT. The axial data were applied to create 3‐dimensional images on the CT work station for post‐processing with the use of current workstation software (GE Advantage Navigation). Results The anatomy of the round window to hook region is complex, and spatial relationships can be difficult to evaluate using 2‐dimensional CT images. Three‐dimensional models of the round window membrane (RWM), cochlear duct, scala vestibule, scala tympani, ductus reuniens, and surrounding structures were generated. The relationship between these structures and the round window membrane (RWM) and adjacent otic capsule was easily identified. Conclusion This 3‐dimensional model has implications for surgical procedures to the inner ear that aim to minimize insertional trauma and decrease operation time. We can know the anatomic information before cochlear implant.