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Anterior Ethmoidal Artery: A Computed Tomography Analysis and New Classifications.

Mohammad Waheed El-Anwar¹, Alaa Omar Khazbak¹, Diaa Bakry Eldib²

¹Department of Otorhinolaryngology Head and Neck, Faculty of Medecine, Zagazig University, Zagazig, Egypt.

Journal of Neurological Surgery. Part B, Skull Base

|July 26, 2021

Summary

This study details the anatomy and variations of the anterior ethmoidal artery (AEA) using CT scans. Findings provide crucial anatomical data for surgeons performing endoscopic procedures.

Keywords:

anterior ethmoidal artery computed tomography lamina papyracea nose skull base

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Area of Science:

Anatomy
Radiology
Otorhinolaryngology

Background:

The anterior ethmoidal artery (AEA) is critical in endoscopic sinus surgery.
Understanding AEA anatomy and variations is essential for surgical safety and efficacy.

Purpose of the Study:

To delineate the detailed anatomy and variations of the anterior ethmoidal artery (AEA) in adults using computed tomography (CT).
To establish new classifications for the AEA based on its anatomical relationships.

Main Methods:

Analysis of 150 paranasal CT scans (300 sides) in adults.
Utilized axial, coronal, and sagittal reformatted images for detailed anatomical assessment.
Quantified AEA canal, foramen, sulcus presence, and measured lengths, angles, and distances to adjacent structures.

Main Results:

High detection rates for AEA canal (97.7%), foramen (95.8%), and sulcus (87.5%).
Detailed measurements of AEA intranasal length, angles with lamina papyracea and cribriform plate, and distances to skull base and frontal sinus ostium.
Introduced new AEA classifications based on distance to skull base and frontal sinus ostium, with defined percentages for each type.

Conclusions:

The study provides comprehensive anatomical data on AEA variations.
Enhanced understanding of AEA anatomy improves surgical awareness in endoscopic procedures.
Findings aid in the training of residents and enhance surgical planning.