Pain Evaluation Device Using Baseline ECG Under Physical Load
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Solution Overview
Problem
Existing pain evaluation methods fail to accurately assess the degree of pain in individuals due to variations in how pain is sensed among individuals, as observed through RR interval analysis alone.
Innovation Solution
A pain evaluation device and method that compares electrocardiographic waveform data obtained with and without applied physical load to determine the degree of pain by calculating differences or ratios between RR or PP intervals, using a dedicated device to apply consistent load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pain evaluation is performed using only RR interval analysis, then the evaluation method is simple, but the measurement precision is insufficient due to individual variations in pain sensing
Solution Approach 1:
The system performs preliminary measurement of RR intervals in a no-load state before applying physical load. This preliminary action establishes a baseline for comparison, enabling accurate pain evaluation by comparing the pre-load and post-load RR interval values, thereby resolving the contradiction between measurement precision and method simplicity
Solution Approach 2:
The evaluation process is segmented into distinct phases: no-load state measurement and load state measurement. By dividing the evaluation into separate measurable states and comparing their differences, the system achieves precise pain assessment without requiring complex continuous monitoring systems
2Reliability
If absolute evaluation of pain is performed based on RR interval variations, then the evaluation process is straightforward, but the reliability is insufficient because it cannot account for individual pain perception differences
Solution Approach 1:
The system uses feedback from the user's own baseline RR interval measurements to adjust and personalize the pain evaluation. By comparing load-induced RR interval changes against the individual's no-load baseline, the system provides reliable pain assessment tailored to each user's pain perception characteristics
Solution Approach 2:
The evaluation methodology transitions from absolute RR interval threshold evaluation to relative change evaluation by comparing RR intervals between no-load and load states. This parameter change approach accounts for individual variations in pain sensing while maintaining evaluation simplicity
Data Source
AI summary
To provide a pain evaluation device, a pain evaluation method, and a non-transitory storage medium storing a pain evaluation program that can evaluate the degree of pain in each individual. A control unit includes: an electrocardiographic waveform acquisition unit configured to acquire electrocardiographic waveform data of a user; and a pain determination unit configured to determine, based on a comparison between first electrocardiographic waveform data obtained by the electrocardiographic waveform acquisition unit in a state where no physical load is applied to the body of the user and second electrocardiographic waveform data obtained by the electrocardiographic waveform acquisition unit in a state where a load is applied to the body of the user, a degree of pain sensed by the user in a state where the load is applied.