Computer-Aided Surgery Navigation System for Knee Replacement
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Solution Overview
Problem
Current computer-assisted surgery systems face challenges in efficiently guiding surgeons during complex procedures like total knee replacement, requiring extensive use of alignment jigs and intricate soft tissue management, which can lead to inaccuracies and increased procedural time.
Innovation Solution
A computer-assisted surgical suite that includes a tracking system for surgical tools, allowing real-time monitoring and control of tool positions, virtual modeling for pre-operative planning, and automatic view adjustment based on tool location, reducing the need for jigs and enhancing precision through color-coded tissue identification and quality assessment of bone cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment jigs are used to guide cutting during total knee replacement, then surgical precision is improved, but device complexity and procedural time increase
Solution Approach 1:
The patent replaces complex mechanical alignment jigs with a computer-based navigation system that uses tracking elements, sensors, and software algorithms to guide surgical instruments. The system substitutes mechanical guidance with optical/electromagnetic tracking and computational geometry to achieve precise bone cutting and prosthesis alignment without requiring intricate physical jigs.
Solution Approach 2:
The system creates a virtual 3D model of the patient's anatomy based on pre-operative imaging and intraoperative tracking data. This digital copy allows surgeons to plan and simulate procedures, and the navigation system continuously updates the virtual model to reflect actual surgical progress, providing real-time guidance without physical contact with the patient's anatomy.
2Manufacturing precision
If alignment jigs are installed during surgical procedure, then surgical precision is improved, but loss of time increases
Solution Approach 1:
The system performs pre-operative planning and imaging to create a personalized 3D model of the patient's anatomy before surgery. Tracking elements are attached to the patient's anatomy during positioning, and the navigation system is calibrated before the actual cutting begins. This preliminary setup eliminates the need to install complex alignment jigs during the critical cutting phase, saving significant surgical time.
Solution Approach 2:
By replacing mechanical alignment jigs with a computer navigation system, the patent eliminates the time-consuming process of installing, adjusting, and removing multiple physical jigs during surgery. The tracking system remains in place throughout the procedure, providing continuous guidance without requiring repeated mechanical interventions.
3Manufacturing precision
If computer assisted surgery is implemented, then surgical precision is improved, but device complexity increases
Solution Approach 1:
The navigation system is designed to be universally applicable to various orthopedic procedures beyond total knee replacement, including total hip replacement, partial knee replacement, and other joint surgeries. The same core platform with tracking elements and software can guide different surgical instruments and procedures, reducing the need for procedure-specific complex devices while maintaining high precision across multiple applications.
Solution Approach 2:
The system introduces a computer as an intermediary between the surgeon and the surgical instruments. The computer processes tracking data, calculates optimal cutting paths and prosthesis positioning, and displays guidance information to the surgeon. This intermediary layer simplifies the interface while providing sophisticated computational guidance, managing system complexity through software rather than mechanical complexity.
Data Source
AI summary
A number of improvements are provided relating to computer aided surgery. The improvement relates to both the methods used during computer aided surgery and the devices used during such procedures. Some of the improvement relate to controlling the selection of which data to display during a procedure and/or how the data is displayed to aid the surgeon. Other improvements relate to the structure of the tools used during a procedure and how the tools can be controlled automatically to improve the efficiency of the procedure. Still other improvements relate to methods of providing feedback during a procedure to improve either the efficiency or quality, or both, for a procedure.