Joint Motion Measurement System with EMG Integration
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Solution Overview
Problem
Current diagnostic methods for joint motion and muscle involvement in orthopedic diagnostics are imprecise and unable to accurately detect spinal pathologies, particularly in the lumbosacral region, due to limitations in measuring internal joint structures and muscle contributions to joint dysfunction, leading to undiagnosed or misdiagnosed cases of back pain.
Innovation Solution
A system comprising a base, a fixable platform, and a dynamic platform with a coupling member, allowing controlled and standardized joint motion capture, combined with medical diagnostic devices like X-ray scanners and electromyography sensors to provide precise data on joint motion and muscle activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current diagnostic methods are used for joint motion measurement, then the diagnostic process is simple, but the measurement precision is insufficient (error margin of at least 5°)
Solution Approach 1:
The system divides the diagnostic process into multiple independent measurement components: joint motion measurement, muscle activation measurement (EMG), and force measurement. Each component can be independently calibrated and optimized, allowing high precision without overwhelming complexity in a single integrated system.
Solution Approach 2:
The patent introduces standardized fixtures and positioning devices as intermediaries between the patient and measurement instruments. These intermediaries ensure consistent anatomical landmark identification and reduce measurement variability, achieving sub-5° precision without requiring complex adaptive algorithms.
2Reliability
If standardized joint motion capture is implemented, then measurement reliability improves, but the ease of operation decreases
Solution Approach 1:
The system requires pre-positioning of fixtures, calibration of measurement devices, and standardization of patient positioning before actual measurement. This preliminary setup ensures high reliability during the measurement phase, though it increases initial operational complexity.
Solution Approach 2:
The patent employs adjustable fixtures and reconfigurable measurement systems that can adapt to different joint types and anatomical variations. By changing physical parameters (fixture positions, measurement angles) rather than requiring complex software adjustments, the system maintains reliability while improving ease of operation across different clinical scenarios.
3Measurement precision
If internal joint structures and muscle contributions are measured, then diagnostic accuracy improves, but the device complexity increases
Solution Approach 1:
The system separates measurements into distinct modules: joint motion capture, muscle activation (EMG), and force measurement. This segmentation allows each module to be optimized independently for its specific measurement task, improving overall diagnostic accuracy without proportionally increasing total system complexity.
Solution Approach 2:
The patent integrates multiple measurement capabilities (motion, EMG, force) into a unified diagnostic platform that can assess both internal joint structures and muscle contributions simultaneously. This multi-functionality achieves comprehensive diagnostic accuracy while sharing common infrastructure (data acquisition, analysis software, positioning systems) to control overall complexity.
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
Enables precise measurement of joint motion and muscle involvement with reduced variability, allowing for accurate diagnosis and treatment planning, improving the detection of spinal pathologies and muscle dysfunctions.
Implementation Method 1
electromyography sensors to provide precise data on joint motion and muscle activity
Data Source
AI summary
An apparatus and process for measuring the motion of internal joint structures during and for measuring the function of muscles involved with the motion of a joint of a subject are disclosed. The apparatus can be configured in three forms: a horizontal, vertical, or butterfly motion control device. Each configuration comprises a static member and a moving member, in which the moving member operates to move or be moved by the subject being studied. Also disclosed are processes for using each apparatus to measure of the relative motion of a skeletal structures in a subject, in which the subject is positioned in the apparatus and commanded to move while diagnostic medical images are taken or captured. Additionally, processes for using each apparatus to specifically measure and collect data on the function of the subject's muscles are disclosed.