KHẢO SÁT HÌNH ẢNH ĐỘNG MẠCH SÀNG TRƯỚC VÀ ĐỘNG MẠCH SÀNG SAU TRÊN CT SCAN MŨI XOANG

Abstract

Introduction: Anterior ethmoidal arteries and posterior ethmoidal arteries are important landmarks, and they must be identified in functional endoscopic sinus surgery. When these arteries are damaged, it can cause intra-ocular haemorrhage and vision loss. Identifying both arteries on CT Scan before surgery are necessary to reduce the risk of complications. Objectives: The purpose of this study was to investigate the presence of anterior ethmoidal artery, the anatomical type of anterior ethmoidal artery, the length of anterior ethmoidal artery and the relationship between the distance from anterior ethmoid artery to ethmoid roof with age, sex, anatomical type, length, presence of anterior ethmoidal artery. Investigating the presence of posterior ethmoidal artery, the anatomical type of posterior ethmoidal artery, the length of posterior ethmoidal artery and the relationship between the distance from posterior ethmoid artery to ethmoid roof with age, sex, anatomical type, length, presence of posterior ethmoidal artery. Also, measuring the distance between anterior ethmoidal artery and posterior ethmoidal artery. Methods: A cross-sectional descriptive study was conducted on 215 patients at Nguyen Tri Phuong Hospital from September 2020 to August 2022. CT images of those patients were analyzed in this study. Results: The proportion of the anterior ethmoid artery present on the 0.625 mm CT film is 97.44%, the mesentery type accounts for most of the arterial types, accounting for 59.43%, usually located from the ethmoid umbilicus to the middle turbinate (types 2, 3, 4) accounted for 92.36%, the average length was 5.53 ± 1.58 mm. The proportion of posterior ethmoid artery present on 0.625 mm CT film is 95.12%, flat type accounts for 74.82% of arterial types, posterior ethmoid artery usually lies between the first and secondary walls from the optic nerve (type 3) accounted for 59.92%, the average length was 4.23 ± 1.56 mm. The distance between the anterior ethmoid artery and the ethmoid roof ranged from 0 mm to 8.18 mm, with a mean of 2.23 (0-3.43) mm. The distance between the posterior ethmoid artery to the ethmoid roof ranged from 0 mm to 2.44 mm, with a mean of 0 (0-0) mm. The average distance from the anterior ethmoid artery to the posterior ethmoid artery was 14.03 ± 2.34 mm. The anterior ethmoid artery distance to the ethmoid roof is positively correlated with the anterior ethmoid artery length, similar results to posterior ethmoid artery. Conclusion: The mean distance between the anterior ethmoid artery to the ethmoid roof is greater than the mean distance between the posterior ethmoid artery to the ethmoid roof. The mean distance of the anterior ethmoid artery to the posterior ethmoid artery in men is greater than the mean distance of the anterior ethmoid artery to the posterior ethmoid artery in women. The greater the distance from the anterior ethmoid artery to the roof, the longer the length of the anterior ethmoid artery and vice versa, similar results to posterior ethmoid artery.