Round window versus cochleostomy technique in cochlear implantation: histologic findings.

Détails

ID Serval
serval:BIB_7BAFC17149FD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Round window versus cochleostomy technique in cochlear implantation: histologic findings.
Périodique
Otology and Neurotology
Auteur(s)
Richard C., Fayad J.N., Doherty J., Linthicum F.H.
ISSN
1537-4505 (Electronic)
ISSN-L
1531-7129
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
33
Numéro
7
Pages
1181-1187
Langue
anglais
Résumé
HYPOTHESIS: Cochleostomy or round window enlargement techniques for cochlear implant electrode insertion result in more abnormal tissue formation in the basal cochlea and are more apt to produce endolymphatic hydrops than round window electrode insertion.
METHODS: Twelve temporal bones from implanted patients were examined under light microscopy and reconstructed with 3-dimensional reconstruction software to determine cochlear damage and volume of neo-ossification and fibrosis after electrode insertion. Amount of new tissue was compared between 3 groups of bones: insertion through the round window (RW), after enlarging the RW (RWE) and cochleostomy (Cochl). The probable role of the electrode was evaluated in each case with hydrops.
RESULTS: More initial damage occurred in the Cochl and RWE groups than in the RW group, and the difference was significant between RWE and RW in cochlear segment I (p < 0.026). The volume of new bone in Segment I differed significantly between groups (p < 0.012) and was greater in the RWE group than in either the Cochl or RW groups (post hoc p's < 0.035 and 0.019, respectively). Hydrops was seen in 5 cases, all in the Cochl and RWE groups. Blockage of the duct was because of new tissue formation in 4 of the 5 hydrops cases.
CONCLUSION: With the electrodes in this series, implantation through the RW minimized initial intracochlear trauma and subsequent new tissue formation, whereas the RW extension technique used at the time of these implantations produced the greatest damage. Future studies may clarify whether today's techniques and electrodes will produce these same patterns of damage.
Mots-clé
Aged, Aged, 80 and over, Cochlear Implantation/adverse effects, Cochlear Implantation/methods, Endolymphatic Hydrops/etiology, Female, Humans, Male, Middle Aged, Round Window, Ear/injuries, Round Window, Ear/surgery, Temporal Bone/pathology, Temporal Bone/surgery
Pubmed
Web of science
Création de la notice
09/02/2016 12:48
Dernière modification de la notice
20/08/2019 14:37
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