Orthopedic Pedicle Screw Auxiliary Device with Integrated X-Ray Imaging
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Solution Overview
Problem
Current auxiliary devices for implanting orthopedic pedicle screws are unstable and prone to inaccurate positioning, lacking the ability to adjust and position in multiple directions, which can lead to serious complications such as paralysis and cerebrospinal fluid leakage during orthopedic pedicle surgery.
Innovation Solution
The proposed auxiliary device includes a first bearing with a slip ring that allows for relative sliding between an outer and inner ring, equipped with a drive mechanism, a swing device, and a rotating device, enabling axial rotation and swinging motions, along with a guiding device that aligns the pedicle drill with the X-ray source and receiver for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single C-shaped arm X-ray machine is used, then the device structure is simple, but it cannot see through both frontal and lateral positions simultaneously and cannot be rotated
Solution Approach 1:
The patent combines a C-shaped arm X-ray machine and a G-shaped arm X-ray machine into a single integrated device. The C-shaped arm provides rotational capability while the G-shaped arm provides simultaneous frontal and lateral imaging. Both X-ray machines share common support structures, control systems, and image processing units, achieving versatile imaging functionality without proportionally increasing device complexity
Solution Approach 2:
The integrated device serves multiple functions: the C-shaped arm enables rotational imaging for different angles, the G-shaped arm provides simultaneous bilateral imaging, and both can be positioned and adjusted independently. This multi-functional design allows a single device to replace what would traditionally require separate imaging equipment
2Measurement precision
If the auxiliary device is designed to be stable and accurate, then positioning precision is improved, but the device structure becomes more complex
Solution Approach 1:
The patent introduces a guide rod as an intermediary component that mechanically links the X-ray imaging system with the pedicle screw implantation system. The guide rod receives real-time imaging guidance from the X-ray machines and translates this information into precise drilling and screw implantation paths, achieving high positioning accuracy without requiring direct complex integration between imaging and surgical components
Solution Approach 2:
The patent replaces complex mechanical positioning mechanisms with a simplified system that uses real-time X-ray imaging feedback combined with a guide rod. Instead of relying on multiple mechanical adjustment mechanisms and calibration systems, the design uses image-guided mechanical guidance through the guide rod, reducing overall device complexity while maintaining or improving positioning accuracy
3Measurement precision
If fluoroscopy equipment is used to assist pedicle drilling, then positioning capability is improved, but the risk of accidentally injuring the dural sac and nerve root increases
Solution Approach 1:
The patent implements real-time feedback through the fluoroscopy system, where the X-ray machines continuously monitor the drilling process and provide immediate visual feedback on drill bit position relative to the pedicle and surrounding structures. The guide rod translates this imaging feedback into real-time guidance, allowing the surgeon to adjust the drilling path dynamically to avoid the dural sac and nerve roots, thereby reducing surgical complications
Solution Approach 2:
The patent performs preliminary imaging and planning before the actual drilling begins. The X-ray machines capture pre-drilling images to identify the precise location and orientation of the pedicle, dural sac, and nerve roots. The guide rod is pre-positioned based on this preliminary information, establishing a safe drilling path before any invasive action is taken, thus preventing accidental injuries
Data Source
AI summary
An auxiliary device for implanting orthopedic pedicle screws includes a first bearing and a slip ring. The first bearing includes an outer ring and an inner ring, the slip ring is fixed with the inner ring, a brush is set between the slip ring and the outer ring, an X-ray light source and an X-ray receiver opposite to the X-ray light source are set on the inner ring, a drive mechanism is set on an external surface of the outer ring, a support device is set at left and right ends of the outer ring in a radial direction thereof; a swing device is provided at an upper portion of the support device, a workbench is provided at a lower portion of the support device, the swing device is connected with the outer ring. A skid platform unit, a lifting device and a rotating device are set on the workbench.