Abstract
External carotid artery originated superior thyroid artery are frequently documented in classical anatomical, surgical and radiological textbooks. Knowledge of anatomical variations, proper identification of superior thyroid arteries is very important to avoid major complications during and after neck surgeries. The aim of the study is to find out the prevalence of right superior thyroid artery originating from right external carotid artery in cadavers of a Medical College in Nepal. A descriptive cross-sectional study was carried out at the department of anatomy in Universal College of Medical Sciences, Bhairahawa, Nepal from October 2020 to January 2021 after ethical clearance from the same institution (IRC UCMS, Ref: UCMS/IRC/078/20). Variations in origin of superior thyroid arteries were observed, recorded and photographed. Convenient sampling method was used. Data was analyzed using Microsoft Excel 2016. Point estimate at 90% Confidence Interval was calculated along with frequency and percentage. Out of 30 right superior thyroid arteries of 30 cadavers, 27 (90%) at 90% Confidence Interval (80.22-96.44) originates from right external carotid artery. In our study we observed that almost nine tenths of right superior thyroid arteries originated from the right external carotid artery which was relatively high in comparison to other studies. Thus, Extensive knowledge of variations in origin of superior thyroid artery is important for surgeons prior to various interventional surgeries.
Highlights
External carotid artery originated superior thyroid artery are frequently documented in classical anatomical, surgical and radiological textbooks
Superior thyroid artery (STA) is one of the large vasculature of head and neck region supplying larynx and thyroid gland.[1]. It is originated from external carotid artery (ECA) but occasionally it originates from common carotid artery and carotid bifurcation.[2]
This study aims to find out the prevalence of right superior thyroid artery originating from the right external carotid artery in cadavers of a medical college in Nepal
Summary
External carotid artery originated superior thyroid artery are frequently documented in classical anatomical, surgical and radiological textbooks. Superior thyroid artery (STA) is one of the large vasculature of head and neck region supplying larynx and thyroid gland.[1] It is originated from external carotid artery (ECA) but occasionally it originates from common carotid artery and carotid bifurcation.[2] Variations in the right external carotid artery originating from superior thyroid arteries are frequently documented in classical anatomical, surgical and radiological textbooks.[4,5] Ample knowledge about variations in arterial supply of superior thyroid artery is required prior to formulating planned neck surgeries and in alerting the surgeons to avoid inadvertent injuries to the vital anatomical structures in this area.[6].
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