RESUMEN
Objective: To explore the anatomical spatial relationship between aorta, superior and inferior vena cava and vertebral body in normal 13-15-year-old adolescents, and to provide evidence for anterior or posterior approach of operation on adolescent. Methods: The normal thoracolumbar CT data of 63 13-15-year-old adolescents in Inner Mongolia were collected, including 15 cases of 13-year-old, 21 cases of 14-year-old and 27 cases of 15-year-old. The serial scanning data of thoracolumbar spine tomography were imported into Mimicsl6. 0 for analysis and measurement in DICOM format. The focus of left transverse process and spinous process was determined as the original 0 point. Measuring the distance of aorta from origin 0 (AO), the aortic-vertebral angle(ot),the distance of the superior vena cava from the origin 0(V,0), the superior vena cava-vertebra body angle(p), the distance of the inferior vena cava from the origin 0(V20), the inferior vena cava-vertebra angle(9). Results: AO,α: 13-year-old(52. 16±3. 21) mm, (1. 89±0. 47)°; 14-year-old(52. 63±2. 28) mm,(-1.91±0. 97)°;15-year-old(57. 57±3. 52)mm, (-2. 47±0. 66) °; V,0,p: 13-year-old(66. 71 ±5. 82) mm, (-5. 14± 1.42)°; 14-year-old(77. 01±2. 89)mm,(-ll. I8±2. 64) °; 15-year-old(78. 54±0. 70)mm, (-20. 61±2. 05) °; V20,9 :13- year-old(62. 69±5. 66) mm, (-23. 85± 1. 92) °; 14-year-old(65. 71 ±5. 39) mm, (- 18. 46±2. 77)°; 15-year-old(75. 98± 8. 49) mm, (-18. 58±2. 09)°.There was significant difference in the distance and angle between large vessels and vertebral bodies between different vertebrae (P<0. 05). Conclusion: Mastering the distance and angle between large vessels and vertebral bodies is helpful to reduce the incidence of vascular injury in the process of spinal nailing.