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A volumetric three-dimensional evaluation of invasiveness of an endoscopic and microscopic approach for transmeatal visualisation of the middle ear

Published online by Cambridge University Press:  22 April 2021

A H A Baazil ,
J G G Dobbe ,
E van Spronsen ,
F A Ebbens ,
F G Dikkers ,
G J Streekstra  and
M J F de Wolf
A H A Baazil
Affiliation:
Department of Otorhinolaryngology, Amsterdam, The Netherlands
J G G Dobbe
Affiliation:
Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
E van Spronsen
Affiliation:
Department of Otorhinolaryngology, Amsterdam, The Netherlands
F A Ebbens
Affiliation:
Department of Otorhinolaryngology, Amsterdam, The Netherlands
F G Dikkers
Affiliation:
Department of Otorhinolaryngology, Amsterdam, The Netherlands
G J Streekstra
Affiliation:
Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
M J F de Wolf*
Affiliation:
Department of Otorhinolaryngology, Amsterdam, The Netherlands
*
Author for correspondence: Dr Maarten de Wolf, Department of Otorhinolaryngology, Amsterdam University Medical Centers, Academic Medical Center, Meibergdreef 9, Amsterdam1105AZ, the Netherlands E-mail: m.j.dewolf@amsterdamumc.nl
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Abstract

Objective

This study aimed to compare the necessary scutum defect for transmeatal visualisation of middle-ear landmarks between an endoscopic and microscopic approach.

Method

Human cadaveric heads were used. In group 1, middle-ear landmarks were visualised by endoscope (group 1 endoscopic approach) and subsequently by microscope (group 1 microscopic approach following endoscopy). In group 2, landmarks were visualised solely microscopically (group 2 microscopic approach). The amount of resected bone was evaluated via computed tomography scans.

Results

In the group 1 endoscopic approach, a median of 6.84 mm3 bone was resected. No statistically significant difference (Mann–Whitney U test, p = 0.163, U = 49.000) was found between the group 1 microscopic approach following endoscopy (median 17.84 mm3) and the group 2 microscopic approach (median 20.08 mm3), so these were combined. The difference between the group 1 endoscopic approach and the group 1 microscopic approach following endoscopy plus group 2 microscopic approach (median 18.16 mm3) was statistically significant (Mann–Whitney U test, p < 0.001, U = 18.000).

Conclusion

This study showed that endoscopic transmeatal visualisation of middle-ear landmarks preserves more of the bony scutum than a microscopic transmeatal approach.

Keywords

Ear, MiddleEndoscopesCholesteatomaEar CanalAnatomic LandmarksOtologic Surgical Procedures
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 135 , Issue 5 , May 2021 , pp. 410 - 414
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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Footnotes

Dr M de Wolf takes responsibility for the integrity of the content of the paper

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