Accuracy of Pedicle Screw Insertion Using Fluoroscopy-Based Navigation-Assisted Surgery : Computed Tomography Postoperative Assessment in 96 Consecutive Patients

作者：Lee Keong Duk; Lyo In Uk^*; Kang Byeong Seong; Sim Hong Bo; Kwon Soon Chan; Park Eun Suk

来源：Journal of Korean Neurosurgical Society, 2014, 56(1): 16-20.

DOI：10.3340/jkns.2014.56.1.16

• Accuracy
• Pedicle screw
• Fluoroscopy-based navigator

Objective : Two-dimensional fluoroscopy-based computerized navigation for the placement of pedicle screws offers the advantage of using stored patient-specific imaging data in providing real-time guidance during screw placement. The study aimed to describe the accuracy and reliability of a fluoroscopy-based navigation system for pedicle screw insertion. %26lt;br%26gt;Methods : A total of 477 pedicle screws were inserted in the lower back of 96 consecutive patients between October 2007 and June 2012 using fluoroscopy-based computer-assisted surgery. The accuracy of screw placement was evaluated using a sophisticated computed tomography protocol. %26lt;br%26gt;Results : Of the 477 pedicle screws, 461 (96.7%) were judged to be inserted correctly. Frank screw misplacement [16 screws (3.3%)] was observed in 15 patients. Of these, 8 were classified as minimally misplaced mm); 3, as moderately misplaced (2.1-4 mm); and 5, as severely misplaced (%26gt;4 mm). No complications, including nerve root injury, cerebrospinal fluid leakage, or internal organ injury, were observed in any of the patients. %26lt;br%26gt;Conclusion : The accuracy of pedicle screw placement using a fluoroscopy-based computer navigation system was observed to be superior to that obtained with conventional techniques.

• 出版日期2014-7