The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia

Objective: The aim of this study was to explore the variability of the anterior ethmoidal artery in Malaysian population by using computed tomography. Methodology: This was a cross sectional study of 252 computed tomography of the paranasal sinuses acquired between 1st January 2014 and 31st Decem...

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Main Author:	Haw, Lim Eng
Format:	Thesis
Language:	English
Published:	2018
Subjects:	RF Otorhinolaryngology
Online Access:	http://eprints.usm.my/46131/1/Dr.%20Lim%20Eng%20Haw-24%20pages.pdf
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id	my-usm-ep.46131
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spelling	my-usm-ep.461312020-02-09T03:32:06Z The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia 2018 Haw, Lim Eng RF Otorhinolaryngology Objective: The aim of this study was to explore the variability of the anterior ethmoidal artery in Malaysian population by using computed tomography. Methodology: This was a cross sectional study of 252 computed tomography of the paranasal sinuses acquired between 1st January 2014 and 31st December 2016. The multiplanar computed tomography images were reconstructed to axial, coronal and sagittal view at 1 mm slice thickness. The relationship of the artery with the skull base, the effect of the pneumatization of ethmoid sinus on this relationship and the distances of the artery from important adjacent reference points were assessed. Results: The anterior ethmoidal foramen was seen in 100% of cases, whereas the anterior ethmoidal canal was only seen in 34.1%. 42.5 % of the anterior ethmoidal artery was found within the skull base, 20.2% at the skull base and the remaining 37.3% coursed freely below the skull base. The prevalence of the supraorbital ethmoid cell and the suprabullar cell were 29.8% and 48.0%, respectively. There was statistically significant association between the presence of the supraorbital ethmoid cell and the position of the anterior ethmoidal artery at the skull base (p < 0.001). The mean height of the lateral lamella of the cribriform plate was 3.74  1.01 mm. The lateral lamella was 1-3 mm in 42.1% and 4-7 mm in 57.9%. With increase in the height of the lateral lamella, the probability for the anterior ethmoidal artery to course freely within the ethmoid sinus increases (p = 0.016). The mean distance of the anterior ethmoidal artery from the skull base was 1.93  2.03 mm, from the orbital floor 21.91  2.47 mm and 49.01  3.53 mm from the nasal floor. Conclusion: This study provides a better understanding of the variability of the anterior ethmoidal artery and its relationship with the skull base. We believe that these details are of paramount importance as a guide for surgeons to ensure a safe endoscopic sinus surgery. 2018 Thesis http://eprints.usm.my/46131/ http://eprints.usm.my/46131/1/Dr.%20Lim%20Eng%20Haw-24%20pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Perubatan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	RF Otorhinolaryngology
spellingShingle	RF Otorhinolaryngology Haw, Lim Eng The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
description	Objective: The aim of this study was to explore the variability of the anterior ethmoidal artery in Malaysian population by using computed tomography. Methodology: This was a cross sectional study of 252 computed tomography of the paranasal sinuses acquired between 1st January 2014 and 31st December 2016. The multiplanar computed tomography images were reconstructed to axial, coronal and sagittal view at 1 mm slice thickness. The relationship of the artery with the skull base, the effect of the pneumatization of ethmoid sinus on this relationship and the distances of the artery from important adjacent reference points were assessed. Results: The anterior ethmoidal foramen was seen in 100% of cases, whereas the anterior ethmoidal canal was only seen in 34.1%. 42.5 % of the anterior ethmoidal artery was found within the skull base, 20.2% at the skull base and the remaining 37.3% coursed freely below the skull base. The prevalence of the supraorbital ethmoid cell and the suprabullar cell were 29.8% and 48.0%, respectively. There was statistically significant association between the presence of the supraorbital ethmoid cell and the position of the anterior ethmoidal artery at the skull base (p < 0.001). The mean height of the lateral lamella of the cribriform plate was 3.74  1.01 mm. The lateral lamella was 1-3 mm in 42.1% and 4-7 mm in 57.9%. With increase in the height of the lateral lamella, the probability for the anterior ethmoidal artery to course freely within the ethmoid sinus increases (p = 0.016). The mean distance of the anterior ethmoidal artery from the skull base was 1.93  2.03 mm, from the orbital floor 21.91  2.47 mm and 49.01  3.53 mm from the nasal floor. Conclusion: This study provides a better understanding of the variability of the anterior ethmoidal artery and its relationship with the skull base. We believe that these details are of paramount importance as a guide for surgeons to ensure a safe endoscopic sinus surgery.
format	Thesis
qualification_level	Master's degree
author	Haw, Lim Eng
author_facet	Haw, Lim Eng
author_sort	Haw, Lim Eng
title	The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
title_short	The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
title_full	The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
title_fullStr	The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
title_full_unstemmed	The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia
title_sort	study of variability of the anterior ethmoidal artery in hospital universiti sains malaysia
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Perubatan
publishDate	2018
url	http://eprints.usm.my/46131/1/Dr.%20Lim%20Eng%20Haw-24%20pages.pdf
_version_	1747821616773988352

The study of variability of the anterior ethmoidal artery in Hospital Universiti Sains Malaysia

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