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Three-dimensional fluoroscopy-guided percutaneous thoracolumbar pedicle screw placement. Technical note
Langston T Holly1, Kevin T Foley
1Division of Neurosurgery, University of California at Los Angeles Medical Center, Los Angeles, California, USA.
Journal of Neurosurgery
|October 18, 2003
Summary
Three-dimensional (3D) fluoroscopic guidance proved feasible and accurate for percutaneous thoracic and lumbar pedicle screw placement in cadavers. This technology enhances spinal navigation for minimally invasive spine surgery.
Area of Science:
- Spinal Surgery
- Medical Imaging
- Orthopedics
Background:
- Percutaneous pedicle screw placement is crucial for spinal stabilization.
- Minimally invasive techniques reduce surgical trauma.
- Accurate screw placement is essential for surgical success and patient safety.
Purpose of the Study:
- To evaluate the feasibility and accuracy of three-dimensional (3D) fluoroscopic guidance for percutaneous thoracic and lumbar pedicle screw insertion.
- To assess the potential of 3D fluoroscopy in facilitating minimally invasive spine surgery.
Main Methods:
- Three-dimensional (3D) fluoroscopic guidance was employed in three cadaveric specimens.
- A dynamic reference array and image-guided workstation were used for navigation.
- Pedicle screw trajectories were planned and executed using image guidance, followed by CT scan verification.
Main Results:
- 94.7% of 94 percutaneous pedicle screws were placed accurately within the cortical margins.
- 100% accuracy was achieved for lumbar pedicle screws (30/30).
- 92% accuracy was observed for thoracic pedicle screws (59/64), with minor wall violations in five cases.
Conclusions:
- Three-dimensional (3D) fluoroscopic guidance, coupled with an image guidance system, enables highly accurate spinal navigation.
- This technology shows promise for advancing minimally invasive techniques in spine surgery.