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A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
Pedicle screw placement with O-arm and stealth navigation.
Suresh Patil1, Emily M Lindley, Evalina L Burger
1The Spine Center, Department of Orthopaedics, University of Colorado, Mail Stop B202, 12631 E 17th Ave, Aurora, CO 80045, USA. vikas.patel@ucdenver.edu
Orthopedics
|January 11, 2012
Summary
The O-arm/Stealth system offers accurate pedicle screw placement with a low misalignment rate. While faster than CT navigation, it takes longer than conventional methods, with potential depth discrepancies noted.
Area of Science:
- Spinal Surgery
- Medical Imaging
- Surgical Navigation
Background:
- Pedicle screw placement is crucial in spinal surgery.
- Various navigation systems exist to improve accuracy.
- The O-arm provides 3D imaging, replacing fluoroscopy and enabling real-time navigation with systems like Stealth.
Purpose of the Study:
- To evaluate the accuracy of pedicle screw placement using the O-arm/Stealth system.
- To assess the time efficiency of the O-arm/Stealth system for screw placement.
Main Methods:
- Retrospective analysis of 188 pedicle screws in 25 patients.
- Utilized the O-arm for 3D imaging and the Stealth system for intraoperative navigation.
- Measured time for O-arm draping, positioning, and screw placement.
Main Results:
- Low rate of pedicle screw misalignment (2.6% medial cortex breach, 2.6% misalignment).
- Mean screw placement time was 8.1 minutes (including O-arm setup) or 5.9 minutes (placement only).
- Screw placements were, on average, 3.14 mm deeper on final O-arm images than initially indicated.
Conclusions:
- The O-arm/Stealth system demonstrates high accuracy for pedicle screw placement.
- Procedural time is comparable to or faster than CT navigation but slower than conventional techniques.
- Awareness of potential depth discrepancies between navigation images and actual screw placement is essential.
