Study on the accuracy of thoracolumbar pedicle screw installation assisted by O-arm navigation
10.3760/cma.j.issn.1001-8050.2015.07.010
- VernacularTitle:O-arm导航辅助下胸腰椎椎弓根螺钉置入精确度研究
- Author:
Tao JIANG
;
Xianjun REN
;
Weidong WANG
;
Tongwei CHU
;
Changqing LI
;
Hong YIN
;
Zegang SHI
- Publication Type:Journal Article
- Keywords:
Spinal fractures;
Surgery,computer-assisted;
Thoracic vertebrae;
Lumbar vertebrae;
Pedicle screws
- From:
Chinese Journal of Trauma
2015;31(7):614-618
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the accuracy and reliability of O-arm-based thoracolumbar pedicle screw installation.Methods A retrospective review was conducted on 75 patients who had undergone thoracolumbar pedicle screw fixation assisted with O-arm navigation (navigation group,n =32) and C-arm fluoroscopy (fluoroscopy group,n =43) from March to October 2014.All the patients were assessed with X-ray and CT images after operation.Accuracy of screw installation in both groups was compared.In navigation group,screw directions were measured on the sagittal and axial images of intraoperative navigation and post-operative CT scanning to evaluate the concordance.Results In fluoroscopy group,a total of 206 pedicle screws were placed with the one-time success rate of 93.2% and accuracy of 90.8% for screw placement,and one misplaced screw (grade llⅢ) led to L3 nerve root symptom.In navigation group,a total of 226 pedicle screws were placed with the one-time success rate of 100% and accuracy of 96.9% for screw placement,and no screw was grade Ⅲ.Further,there were no significant differences in screw directions on the sagittal and axial images between intraoperative navigation and postoperative CT scanning (P > 0.05).Conclusion O-arm navigation that provides high-resolution images and high precision improves the accuracy of thoracolumbar pedicle screw installation,and possesses good reliability.