Digital analysis of the anatomical relationship between screw entry points in transverse sacroiliac joint geometric channel and the superior gluteal artery
10.3760/cma.j.cn115530-20250108-00010
- VernacularTitle:数字化分析横向骶髂关节几何螺钉钉道入钉点与臀上动脉的解剖学关系研究
- Author:
Xiaoli ZHANG
1
;
Yuanzhi ZHANG
;
Kai SUN
;
Yueteng ZHANG
;
Ya'ou LIU
;
Gang LIU
Author Information
1. 内蒙古医科大学附属医院外科，呼和浩特 010050
- Publication Type:Journal Article
- Keywords:
Imaging;
Sacrum;
Sacroiliac joint;
Screw channel;
Superior gluteal artery
- From:
Chinese Journal of Orthopaedic Trauma
2025;27(7):607-611
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To digitally analyze and measure the anatomical relationship between screw entry points in the transverse sacroiliac joint geometric channels (S 1, S 2, S 3) and the superior gluteal artery. Methods:Enrolled in this study were 147 healthy volunteers (119 males and 28 females) with an average age of (36.2±18.3) years who had undergone CT examination at Department of Orthopedics, The Second Affiliated Hospital of Inner Mongolia Medical University from January 2020 to May 2024. The geometric channels for screws in the transverse sacroiliac joint S 1, S 2, and S 3 were determined by 3D reconstruction of the pelvic CT scan data. After the shortest distance from the branch of the superior gluteal artery to the screw entry point into the channel was measured for each segment on the left and right sides, interlateral comparisons were performed. Results:Of the 147 volunteers, 107 (72.79%) had transverse sacroiliac joint geometric channels for sacroiliac screws in S 1 vertebrae, 147 (100.00%) had transverse sacroiliac joint geometric channels for sacroiliac screws in S 2 vertebral body, and 22 cases (14.97%) had transverse sacroiliac joint geometric channels for sacroiliac screws in S 3 vertebral body. The shortest distances from the superficial branch of the superior gluteral artery to the entry point of the screw channal were (18.13±2.79) mm at S 1, (30.83±3.43) mm at S 2, and (35.88±4.22) mm at S 3 on the left side, and (18.65±3.21) mm at S 1, (31.41±3.88) mm at S 2, and (34.46±4.13) mm at S 3 on the right side. The shortest distances from the deep superior branch of the superior gluteal artery to the entry point of the screw channel were (20.81±2.93) mm at S 1, and (29.72±4.32) mm at S 2 on the left side, and (21.32±3.13) mm at S 1, and (30.13±4.66) mm at S 2 on the right side. There was no difference in the distance from the screw entry point to the superior gluteal artery in all segments between the right and the left sides ( P>0.05). The distance from the right and left screw points to the superior gluteal artery showed an increasing trend from segment S 1, to segment S 2, and to segment S 3, being the farthest in S 3. Conclusions:Transverse sacroiliac joint geometric (safe) channels at segments S 1, S 2, S 3 exist on imaging in most adults, but they may vary in the risk of injury to the superior gluteal artery. The risk of injury to the superior gluteal artery in fixation with S 1 transverse sacroiliac screws is greater than that with S 2 and S 3 transverse sacroiliac screws. The risk of injury to the superior gluteal artery is the minimal with S 3 transverse screw fixation.
