Motion Sensor Postural Control Evaluation for Stroke Rehabilitation
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Solution Overview
Problem
Current methods for evaluating the postural control ability of stroke patients are largely qualitative, lacking objectivity and accuracy, which hinders the development of tailored rehabilitation training programs.
Innovation Solution
A device and method utilizing motion sensors to quantify posture changes and analyze dynamic sensing data, comparing these against reference values to objectively assess postural control ability in stroke patients, providing a more accurate evaluation of rehabilitation effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional qualitative evaluation scales are used by medical staff, then the evaluation process is simple and quick, but the measurement precision and objectivity of postural control ability assessment deteriorates
Solution Approach 1:
The patent replaces the manual qualitative assessment system with an automated electronic sensing system. Motion sensors (accelerometers, gyroscopes, magnetometers) substitute for human visual and tactile assessment, converting postural control measurement from subjective mechanical judgment to objective electronic detection and computational analysis
Solution Approach 2:
The patent introduces motion sensors and a processor as intermediary devices between the patient's body and the evaluation system. These intermediaries capture postural data through sensors, process it through algorithms comparing against reference values, and produce quantitative evaluation results, bridging the gap between physical postural state and assessable metrics
2Measurement precision
If motion sensors are used to sense posture changes, then the measurement precision of postural control evaluation is improved, but the device complexity increases
Solution Approach 1:
The patent employs multi-functional motion sensors that simultaneously perform multiple measurement tasks. The same sensor system evaluates sitting posture, standing posture, and posture transitions without requiring separate devices for each assessment type, reducing overall system complexity while maintaining high measurement precision across multiple functions
Solution Approach 2:
The patent combines multiple sensing functions (acceleration, rotation, magnetic field detection) into an integrated motion sensor system. By merging these functions into single sensor units rather than using separate sensors for each measurement type, the system achieves high measurement precision while managing device complexity through consolidation
3Reliability
If quantitative evaluation based on dynamic sensing data is implemented, then the reliability of rehabilitation effectiveness assessment is improved, but the loss of time for data processing increases
Solution Approach 1:
The patent pre-establishes reference values for normal postural control and evaluation criteria before actual assessment. By having these reference standards prepared in advance, the system can quickly compare sensed data against predetermined thresholds and algorithms, enabling reliable quantitative evaluation without time-consuming manual analysis or real-time decision-making
Data Source
AI summary
The present invention provides a method for evaluating the postural control ability of a subject, including the steps of configuring a plurality of motion sensors on a plurality of body parts of the subject correspondingly to generate a plurality of sensing data, wherein each of the plurality of sensing data includes static sensing data and dynamic sensing data; performing a posture determination procedure according to the plurality of static sensing data to determine a specific body posture of the subject; and performing an evaluation procedure for the postural control ability. The evaluation procedure includes the steps of processing each of the plurality of dynamic sensing data to obtain a posture maintenance parameter for each of the plurality of body parts under the specific body posture, and comparing the posture maintenance parameter to a reference value of posture maintenance for each of the body parts under the specific body posture so as to generate an evaluation result of the postural control ability.