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CC BY 4.0 · Int Arch Otorhinolaryngol 2024; 28(03): e424-e431
DOI: 10.1055/s-0043-1777447
Original Research

Anatomical Measurement as a Reference for Functional Endoscopic Sinus Surgery Based on CT Scans and Dissections

Andressa Vinha Zanuncio 
1   Department of Medicine, Universidade Federal de São João del-Rei, Campus Centro Oeste, Divinópolis, MG, Brazil
,
Flávia Gontijo Amaral
2   Department of Radiology, Universidade Federal de São João del-Rei, Divinópolis, MG, Brazil
,
Marcell de Barros Duarte Pereira
2   Department of Radiology, Universidade Federal de São João del-Rei, Divinópolis, MG, Brazil
,
Flávio Barbosa Nunes
3   Department of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
,
Roberto Eustáquio Santos Guimarães
3   Department of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
› Author Affiliations Funding The authors declare that they have received no financial support from agencies in the public, private, or non-profit sectors to conduct the present research.
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Abstract

Introduction Diseases of the paranasal sinuses, nasal cavities, and those related to the skull base can be treated with nasal endoscopic surgery. Anatomical references are essential to safely perform these surgeries.

Objective To measure and compare the distance from the posterior wall of the maxillary sinus to the anterior skull base in cadavers and on computed tomography (CT) scans to determine a measurement as an anatomical reference in imaging exams for sinus and anterior skull base surgery.

Methods In dissections and CT scans, we took measurements from the most upper and medial point of the posterior wall of the maxillary sinus (point A) to the point where the skull base deflects and the anterior sphenoid wall is formed (Δ 90°; point B), in the right and left nasal cavities. We used 51 cadavers aged ≥ 18 years in the present research.

Results The measurements obtained from CT scans and dissections were greater than 1.5 cm in all cadavers, and they were positively correlated. The 1-cm increase in the AB-tomography measurement corresponded to the 1.08-cm increase to the right and 1.07-cm to the left in the AB-dissection measurement.

Conclusion The CT measurements may be considered a reliable tool to promote safe and effective access to the paranasal sinuses, matching the distance that should be dissected until the anterior base of the skull.

Keywords

endoscopic surgery - FESS - skull base - paranasal CT scans - paranasal sinuses


Publication History

Received: 07 October 2022

Accepted: 15 October 2023

Article published online:
05 July 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (https://creativecommons.org/licenses/by/4.0/)

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