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Study on the variations of the ventral abdominal aortic branches : a computed tomography based study

Author:

Joel Arudchelvam

Teaching Hospital Anuradhapura, LK
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Abstract

Introduction
The abdominal aorta [AA] begins at the aortic hiatus [at the 12th thoracic vertebra [T12]] and ends at the fourth lumbar vertebra [L4]. The main ventral branches of the AA are Coeliac Axis [CA], Superior Mesenteric Artery [SMA] and Inferior Mesenteric Artery [IMA]. Variations occur in branching pattern and the level of origin.


Methods
This is a cross-sectional, descriptive Computed Tomographic imaging [CT] based study done at the Teaching Hospital Anuradhapura, Sri Lanka from November 2018 to March 2019. Consecutive patients undergoing CT abdomen at the radiology department were selected. All images were analysed by the author in conjunction with the radiologist. Images of patients less than 25 years, incomplete records, non-clear images and images with the non-identifiable origin of the arteries were also excluded.


Results
102 were included. 53.9% were males. The mean age was 58.0 years. CA originated at the level of T12 in 68.3%.SMA originated at the L1 level in 90.2%. IMA originated at the L3 level in 89.3%. AA divided at the level of L4 in 81.8%. Three [2.9%] had variations including coelio mesenteric trunk, splenic artery/left gastric artery directly arising from the aorta.


Discussion and Conclusions
Visceral branches of AA develop from omphalo-mesenteric arteries [vitelline arteries] and their ventral anastomosis. The regression pattern of these arteries results in variations. In this study, SMA had the most consistent level of origin at L1. Variations of CA and SMA occurred in 2.9%. Awareness of these is important to avoid complications, especially in emergency surgeries.

How to Cite: Arudchelvam J. Study on the variations of the ventral abdominal aortic branches : a computed tomography based study. Sri Lanka Journal of Surgery. 2021;39(1):26–9. DOI: http://doi.org/10.4038/sljs.v39i1.8751
Published on 31 Mar 2021.
Peer Reviewed

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