Two-Arm Surgical Navigation Device for X-Ray-Sparing Implant Alignment
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Solution Overview
Problem
Existing methods for implant positioning in computer-assisted surgery require repeated x-ray exposure, leading to high radiation doses for patients and limited accuracy.
Innovation Solution
A computer-assisted surgery device with two robot arms that utilize a reference structure, position determining units, and motion controlling units to accurately position implants, tools, and guiding devices relative to each other, reducing the need for iterative x-ray monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If repeated x-ray monitoring is used to ensure correct implant positioning, then implant alignment accuracy is improved, but patient radiation exposure increases
Solution Approach 1:
The system performs preliminary 3D planning and simulation before surgery to pre-determine the optimal implant position and trajectory. This preliminary action allows the surgeon to know the exact target position in advance, reducing the need for repeated intraoperative x-ray monitoring and adjustments, thereby decreasing patient radiation exposure while maintaining alignment accuracy.
Solution Approach 2:
The invention replaces the traditional mechanical x-ray monitoring system with a computer-assisted navigation system that uses preoperative 3D imaging and real-time tracking. This substitution eliminates the need for repeated fluoroscopic images by providing continuous visual feedback through software visualization, thus reducing radiation exposure while maintaining or improving positioning precision.
2Measurement precision
If K-wire is inserted deeper into bone for better illustration, then positioning accuracy is improved, but x-ray exposure and procedure complexity increase
Solution Approach 1:
The system introduces a computer-assisted navigation interface as an intermediary between the surgeon and the physical positioning process. Instead of relying on deep K-wire insertion and repeated x-ray imaging to visualize position, the navigation system provides real-time digital visualization of tool and implant positions relative to the preoperative 3D model, eliminating the need for deep bone insertion and reducing x-ray exposure.
3Measurement precision
If full navigation system with stereo camera is used, then positioning accuracy is improved, but device complexity and setup time increase
Solution Approach 1:
The invention extracts and eliminates the complex stereo camera system from the navigation setup. Instead of using multiple cameras and complex optical tracking, the system relies on preoperative 3D imaging data and a simplified tracking mechanism, thereby reducing device complexity and setup time while maintaining high positioning accuracy through computer-assisted visualization.
4Measurement precision
If multiple iterative adjustments are made to implant position, then alignment accuracy is improved, but surgical time and x-ray exposure increase
Solution Approach 1:
The system performs all necessary planning, simulation, and trajectory calculation before the actual implantation. The surgeon visualizes the complete procedure in advance using the computer-assisted navigation system, allowing for single-pass accurate implantation without multiple iterative adjustments, thereby reducing surgical time and minimizing the need for intraoperative x-ray monitoring.
Data Source
AI summary
A computer-assisted surgery device includes a reference structure, an arm, a positioning determining unit, and a motion controlling unit and a method for operating the same allows a more efficient positioning and application of an implant with respect to a bony structure, and in particular a shorter operation time and less intensity of x-ray exposure for a patient.