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European Archives of Oto-Rhino-Laryngology
Published in: European Archives of Oto-Rhino-Laryngology 7/2019

01-07-2019 | Otosclerosis | Otology

The role of endoscopic stapes surgery in difficult oval window niche anatomy

Authors: Ignacio Javier Fernandez, Marco Bonali, Matteo Fermi, Michael Ghirelli, Domenico Villari, Livio Presutti

Published in: European Archives of Oto-Rhino-Laryngology | Issue 7/2019

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Abstract

Purpose

The surgical treatment of otosclerosis can be challenging in case of anatomical abnormalities or variations of the oval window niche (OWN) area, as in very narrow OWN or in an overhanging facial nerve. The aim of the present study was to explore the role of endoscopic stapes surgery in cases with difficult OWN anatomy.

Methods

Patients undergoing endoscopic stapes surgery from 2008 to 2017, which fulfilled the CT scan criteria for a “difficult” anatomical condition, according to the measurements and cut-off values defined in the literature, were retrospectively selected. The intraoperative endoscopic view of the anatomical details and surgical difficulties were analysed through the review of the operative videos. Finally, a statistical analysis of the relationship between endoscopic visualization of anatomical details and radiological measurements was carried out.

Results

Eighteen out of 205 patients (8.7%) were included in the study. The 94.4% of patients obtained an optimal endoscopic exposure and visualization of all the anatomical details considered in the study, during each step of stapes surgery. The OWN measurements (width, depth and facial–promontory angle) did not affect significantly the endoscopic surgical exposure of the footplate or any of the other anatomical details.

Conclusions

The anatomic features of the oval window area which reduce the visualization in microscopic surgery, did not affect the surgical exposure in endoscopic stapes surgery. Patients having a difficult anatomy of the OWN can be treated safely with the endoscopic approach. In the case of a predicted “difficult anatomy”, the endoscopic approach can be considered a viable option.
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Metadata
Title
The role of endoscopic stapes surgery in difficult oval window niche anatomy
Authors
Ignacio Javier Fernandez
Marco Bonali
Matteo Fermi
Michael Ghirelli
Domenico Villari
Livio Presutti
Publication date
01-07-2019
Publisher
Springer Berlin Heidelberg
Keyword
Otosclerosis
Published in
European Archives of Oto-Rhino-Laryngology / Issue 7/2019
Print ISSN: 0937-4477
Electronic ISSN: 1434-4726
DOI
https://doi.org/10.1007/s00405-019-05401-z

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