Joint Replacement Planning Using EMG-Based Functional Stability
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Solution Overview
Problem
Existing joint replacement surgeries lack a comprehensive system to evaluate joint stability and guide surgeons on optimal implant positioning based on functional stability analysis, relying mainly on indirect methods like dynamic x-rays.
Innovation Solution
A system and method that utilizes wearable sensors to measure muscle strength and activity levels, compares the data with reference data from healthy individuals, and generates personalized joint replacement recommendations, including ideal joint planes, alignment, cutting planes, and implant types, using electromyography and gyro sensors to ensure proper implant placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If indirect methods like dynamic x-rays are used to assess joint implant functionality, then the assessment can be performed, but the measurement precision and direct evaluation of functional stability are insufficient
Solution Approach 1:
The patent replaces indirect radiographic assessment with direct electromyographic measurement of muscle activity. EMG sensors detect electrical signals from muscles surrounding the joint, providing direct functional stability data without requiring complex radiographic imaging and interpretation, thus improving measurement precision while reducing device complexity
Solution Approach 2:
The patent introduces muscle activity as an intermediary measurement to assess joint implant functionality. Instead of directly measuring implant stability through complex imaging, the system measures the physiological response (muscle activity) that indicates functional stability, providing a simpler and more precise assessment method
2Manufacturing precision
If traditional joint replacement surgery is performed without functional stability analysis, then the procedure can be completed, but the implant positioning accuracy and functional outcome are compromised
Solution Approach 1:
The patent performs functional stability assessment and muscle activity analysis before the actual implant placement. This preliminary measurement guides the surgeon in positioning the implant optimally, ensuring accurate alignment with functional requirements while maintaining surgical efficiency through pre-planned positioning parameters
Solution Approach 2:
The patent provides real-time feedback during surgery through EMG measurements of muscle activity. The system monitors muscle responses and adjusts implant positioning based on functional stability indicators, ensuring optimal positioning while maintaining surgical workflow efficiency through immediate feedback rather than post-operative assessment
3Adaptability or versatility
If generic joint replacement protocols are used, then the surgical process is standardized, but the functional stability and individualized treatment optimization are reduced
Solution Approach 1:
The patent applies local quality assessment by measuring muscle activity specifically at the joint site surrounding the implant. The EMG sensors are positioned to detect localized muscle responses, providing individualized functional stability data for each patient's specific anatomy and muscle characteristics, enabling tailored implant positioning without requiring complex system-wide analysis
Solution Approach 2:
The patent segments the assessment into specific muscle groups surrounding the joint, evaluating each muscle's activity and contribution to joint stability. This segmented approach allows individualized treatment planning based on specific muscle function patterns while keeping the overall system manageable through modular assessment of discrete muscle components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides personalized and accurate joint replacement plans that enhance functional stability and range of motion by aligning implants with individual muscle capabilities, reducing deformities and pain.
Implementation Method 1
The sensors may comprise a shirt, sleeves, or stocks including inwoven electromyography sensors that measure electrical signals generated by the muscles
Implementation Method 2
and gyro sensors for movement detection
Data Source
AI summary
A method and system for guiding joint replacement procedures based on functional stability analysis of a joint. The method comprises communicatively connecting to a plurality of sensors worn by an individual at muscles in a joint area and performing an initial measurement that evaluates strength and activity level of the muscles. The initial measurement includes a recording of data values from the plurality of sensors during a preoperative testing procedure. The initial measurement is compared with reference data, wherein the reference data includes measurements of healthy people with normal muscle function. The method further comprises generating joint replacement recommendations based on the comparison.