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<p>The aims of the study were to study the anatomical course of the ethmoidal arteries and its variations and to assess which sections in Computed Tomography Scan of Paranasal Sinuses is ideal for identification and study of the course of the ethmoidal arteries. The study was a one year observational study undertaken on 155 computed tomography scans of paranasal sinuses in our tertiary care hospital. The scans were evaluated and anatomical variations of anterior ethmoidal artery, middle ethmoidal artery and posterior ethmoidal artery were studied. Anterior ethmoidal artery and posterior ethmoidal artery were found in all sides studied, while middle ethmoidal artery was found in 15.16% of all sides studied. Anterior ethmoidal foramen and anterior ethmoidal sulcus were found in all sides assessed and are reliable landmarks to identify anterior ethmoidal artery. Anterior ethmoidal artery was found to run in skull base in 51.61% of the sides and in mesentery in 48.39% of the sides. In mesentery position, anterior ethmoidal artery was found to travel in a canal at an average distance of 3.77&#xa0;mm away from skull base with an average length of 4.53&#xa0;mm. Anterior ethmoidal artery ran in mesentery position when supraorbital pneumatisation was present. Anterior ethmoidal artery was found to nearly always run in skull base in cases with rudimentary frontal sinus. Posterior ethmoidal artery was found in skull base in 95.81% of the sides studied, and in long mesentery in 4.19% of the sides studied. The posterior ethmoidal artery was found at an average distance of 7.7&#xa0;mm from the optic canal. In the sides that middle ethmoidal artery was present, it ran in skull base in 97.87% of the sides and in mesentery in the remaining sides. The middle ethmoidal artery was located at an average distance of 8.5&#xa0;mm and 4.21&#xa0;mm from anterior ethmoidal artery and posterior ethmoidal artery respectively. Ethmoidal arteries are prone to traumatic injury during endonasal surgeries and endoscopic skull base surgeries. Anatomy of these arteries can be assessed by radiological imaging which helps in preventing damage to these vessels, and also if damaged, to localise the vessels to control bleeding and reduce risk of complications.</p>

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A Study of Variation of Ethmoidal Arteries in Nasal Cavity Using Computed Tomography Scan of Paranasal Sinuses: A One Year Observational Study

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Dhawal Amin,
  • Rajendra Metgudmath,
  • Virupaxi Hattiholi

摘要

The aims of the study were to study the anatomical course of the ethmoidal arteries and its variations and to assess which sections in Computed Tomography Scan of Paranasal Sinuses is ideal for identification and study of the course of the ethmoidal arteries. The study was a one year observational study undertaken on 155 computed tomography scans of paranasal sinuses in our tertiary care hospital. The scans were evaluated and anatomical variations of anterior ethmoidal artery, middle ethmoidal artery and posterior ethmoidal artery were studied. Anterior ethmoidal artery and posterior ethmoidal artery were found in all sides studied, while middle ethmoidal artery was found in 15.16% of all sides studied. Anterior ethmoidal foramen and anterior ethmoidal sulcus were found in all sides assessed and are reliable landmarks to identify anterior ethmoidal artery. Anterior ethmoidal artery was found to run in skull base in 51.61% of the sides and in mesentery in 48.39% of the sides. In mesentery position, anterior ethmoidal artery was found to travel in a canal at an average distance of 3.77 mm away from skull base with an average length of 4.53 mm. Anterior ethmoidal artery ran in mesentery position when supraorbital pneumatisation was present. Anterior ethmoidal artery was found to nearly always run in skull base in cases with rudimentary frontal sinus. Posterior ethmoidal artery was found in skull base in 95.81% of the sides studied, and in long mesentery in 4.19% of the sides studied. The posterior ethmoidal artery was found at an average distance of 7.7 mm from the optic canal. In the sides that middle ethmoidal artery was present, it ran in skull base in 97.87% of the sides and in mesentery in the remaining sides. The middle ethmoidal artery was located at an average distance of 8.5 mm and 4.21 mm from anterior ethmoidal artery and posterior ethmoidal artery respectively. Ethmoidal arteries are prone to traumatic injury during endonasal surgeries and endoscopic skull base surgeries. Anatomy of these arteries can be assessed by radiological imaging which helps in preventing damage to these vessels, and also if damaged, to localise the vessels to control bleeding and reduce risk of complications.