上位頚椎部における椎骨動脈の走行の検討

Abstract

We analyzed the relations hip between the upper cervical spine and vertebral artery by angiography. The subjects of this study were 50 patients, whose ages ranged from 19 to 77 years. We measured; 1) the distance between the vertebral artery and midline at the level of C1 and C2; 2) the distance between the vertebral artery and midline at the level of the atlantoaxial joint; 3) the distance between the vertebral artery and C2 pedicle. The point of screw placement for C1-2 transarticular fixation was found to be 40% from the medial side of the atlantoaxial joint from the A-P view and 5% from the C2 pedicle from the lateral view.