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Open Access 07-12-2024 | Otology

Arcuate eminence distance to temporal bone outer table in the middle fossa repair of superior canal dehiscence

Authors: Hong-Ho Yang, Isaac Yang, Quinton S. Gopen

Published in: European Archives of Oto-Rhino-Laryngology

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Abstract

Purpose

To investigate the influence of arcuate eminence’s distance to temporal bone outer table (AE-OT) on surgical outcomes following the middle fossa repair of superior canal dehiscence (SCD).

Methods

We conducted a cohort study of consecutive repairs at a center between 2011 and 2022. AE-OT was measured on temporal bone CT imaging. Surgical outcomes were assessed with established metrics including Symptom Resolution Score (SRS), rate of Overall Symptom Improvement (OSI), and change in low-frequency air–bone gap (ΔLF-ABG) from pre- to post-surgery. Multivariable regression models assessing surgical outcomes were constructed with AE-OT as the primary predictor. Models adjusted for patient demographics, medical and surgical history, and follow-up duration.

Results

A total of 402 repairs were included. Mean AE-OT was 27.1 mm (SD 2.1, range 20.8–33.9). Every mm increase in AE-OT was independently associated with a 14% reduction in odds of OSI (aOR 0.86, 95% C.I. [0.75, 0.98]) and a 4-point decrease in SRS (adj. β − 4.0 [− 6.9, − 1.1]) among frank dehiscences. AE-OT was also not associated with operative duration and ΔLF-ABG among both frank dehiscences and near dehiscences.

Conclusions

Longer AE-OT predicted poorer symptomatic response but similar operative duration and audiometric improvement among frank SCD cases.
Literature
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Metadata
Title
Arcuate eminence distance to temporal bone outer table in the middle fossa repair of superior canal dehiscence
Authors
Hong-Ho Yang
Isaac Yang
Quinton S. Gopen
Publication date
07-12-2024
Publisher
Springer Berlin Heidelberg
Published in
European Archives of Oto-Rhino-Laryngology
Print ISSN: 0937-4477
Electronic ISSN: 1434-4726
DOI
https://doi.org/10.1007/s00405-024-09067-0