Comparison of computerized tomography and direct visualization in thoracic pedicle screw placement

Update item information
Publication Type Journal Article
School or College School of Medicine
Department Neurosurgery
Creator Dailey, Andrew T.; Brodke, Darrel S.
Other Author Rao, Ganesh; Rondina, Matthew
Title Comparison of computerized tomography and direct visualization in thoracic pedicle screw placement
Date 2002
Description Object. To validate computerized tomography (CT) scanning as a tool to assess the accuracy of thoracic pedicle screw placement, the authors compared its accuracy with that of direct visualization in instrumented cadaveric spine specimens. Methods. A grading scale was devised to score the placement of the pedicle screw. The grades ranged from 0 to 3 depending on the extent to which the pedicle had been violated. One hundred fifty-five pedicles were fitted with instrumentation in eight cadaveric spines. A single observer graded the appearance of the screw based on CT scans (3-mm axial sections with 1-mm overlap) and direct visualization of the specimen. The authors arrived at a Kappa value of 0.51, which suggested only moderate agreement between the two measurement techniques. Whereas CT had a positive predictive value of 95%, it had a negative predictive value of 62%. Conclusions. The authors thus conclude that although CT scanning is the most valid tool to assess the accuracy of thoracic pedicle screw placement, it tends to overestimate the number of misplaced screws.
Type Text
Publisher American Association of Neurological Surgeons (AANS)
Volume 97
Issue 2 Suppl
First Page 223
Last Page 226
Subject Computerized tomography; Direct visualization; Thoracic pedicle screw; Pedicle; Thoracic spine
Subject LCSH Tomography; Bone screws (Orthopedics); Thoracic vertebrae; Thoracic vertebrae -- Surgery
Language eng
Bibliographic Citation Rao, G., Brodke, D. S., Rondina, M., & Dailey, A. T. (2002). Comparison of computerized tomography and direct visualization in thoracic pedicle screw placement. Journal of Neurosurgery, 97(2 Suppl), 223-6.
Rights Management (c) American Association of Neurological Surgeons
Format Medium application/pdf
Format Extent 132,455 bytes
Identifier ir-main,13125
ARK ark:/87278/s6sb4qc7
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2012-06-13
ID 707065
Reference URL https://collections.lib.utah.edu/ark:/87278/s6sb4qc7
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