Automated Knee Implant Planning System
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Solution Overview
Problem
Proper orientation of prosthetic components in knee joint replacement surgeries is challenging, leading to potential improper alignment and premature component failure, as manual determination can be time-consuming and may not result in optimal placement.
Innovation Solution
A computer-implemented method and system that receive desired separation distances and relative positions of the tibia and femur at various flexion positions to estimate and determine orientation parameter values for prosthetic components, using optimization algorithms to suggest optimal orientations for prosthetic components, such as femoral and tibial components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual determination of prosthetic component orientation is used, then surgeon experience and judgment are applied, but the process is time-consuming and may not result in optimal placement
Solution Approach 1:
The system performs preliminary calculations and simulations of prosthetic component orientations before surgery using patient-specific anatomical data. Multiple potential orientations are pre-evaluated with predicted outcomes, allowing the surgeon to select the optimal orientation without time-consuming intraoperative adjustments. This advance planning ensures high orientation accuracy while reducing actual surgical time.
Solution Approach 2:
The system creates a virtual copy or digital model of the patient's knee joint anatomy using imaging data. This digital twin allows for simulation and evaluation of different prosthetic orientations without affecting the actual patient. The virtual model can be manipulated and analyzed to determine optimal component placement, providing precise orientation guidance while saving surgical time.
2Reliability
If manual determination of prosthetic component orientation is used, then flexibility in decision-making is maintained, but the alignment accuracy may be insufficient leading to premature component failure
Solution Approach 1:
The system incorporates feedback loops that allow the surgeon to input preferences, constraints, or adjustments based on intraoperative findings. The system then re-evaluates and adjusts the recommended orientations accordingly. This interactive feedback mechanism maintains surgical flexibility and judgment while ensuring high alignment accuracy through computational optimization, ultimately improving component longevity without excessive complexity.
Solution Approach 2:
The system allows dynamic adjustment of orientation parameters based on patient-specific anatomy, desired surgical outcomes, and intraoperative conditions. By optimizing multiple parameters simultaneously (alignment angles, component positions, soft tissue balance), the system achieves high reliability and component longevity while presenting a user-friendly interface that doesn't overwhelm the surgeon with complexity.
3Productivity
If automated calculation systems are used to determine prosthetic orientations, then time efficiency is improved, but the system complexity increases
Solution Approach 1:
The system integrates multiple functions into a single platform: anatomical data processing, virtual modeling, orientation calculation, outcome prediction, and surgical guidance. This multi-functional integration improves planning efficiency by providing all necessary tools in one system while managing complexity through unified architecture and standardized interfaces that surgeons can easily navigate.
Data Source
AI summary
A surgical system includes a tracking system configured to intraoperatively track relative positions of bones of a joint, a user interface configured to obtain a user input indicating a post-operative value for the joint, and a computer programmed to generate, based on the relative positions of the bones and the post-operative value, a planned orientation for an implant to be implanted in the joint, and to generate a surgical plan based on the planned orientation for the implant.