Đánh giá độ chính xác của kỹ thuật đặt vít cuống đốt C2 qua điểm vào dưới mấu khớp trên

Abstract

Objective: To evaluate the accuracy of the C2 pedicle screw placement via subarticular entry point. Subject and method: Retrospective 43 patient was placed C2 pedicle screw placement (73 screws) at Neurosurgery Department of 108 Military Central Hospital from January 2015 to December 2021. All patients were planned based on preoperative 3D computed tomography images, based on the following index: width and height of the pedicle; angles of the pedicle on the axial and saggital planes. The accuracy of screw is determined by the percentage of screw diameter outside the pedicle on on postoperative scans (according to Sciubba’s classification, 2009). Result: The authors found an average pedicle width of 5.0 ± 1.4mm, pedicle height of 4.9 ± 1.3mm, axial angle of 43.1 ± 3.7°, sagittal angle of 18.5 ± 2.4° and the average screw length was 25.7 ± 3.2mm. The C2 pedicle screw placement via subarticular entry point (Yeom's technique) had with high accuracy with 84.9% of the screw is completely inside pedicle. There were no cases of intraoperative vertebral artery and neural structures injury. Conclusion: C2 transpedicular screw placement can be exactly performed using the subarticular entry point. The analysis of preoperative 3D computed tomography data is valuable in planning the surgical proceduce.