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Discrete sensors distribution for accurate plantar pressure analyses
Laetitia Claverie1, Anne Ille1, Pierre Moretto2
1Université de Toulouse III, UPS, PRISSMH, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France.
Medical Engineering & Physics
|October 18, 2016
Summary
Optimizing sensor placement in wireless plantar pressure systems significantly improves accuracy for clinical and research use. This study found a specific sensor layout enhanced measurements of pressure distribution and forces during walking.
Area of Science:
- Biomechanics
- Biomedical Engineering
- Sports Science
Background:
- Accurate plantar pressure analysis is crucial for understanding foot biomechanics and diagnosing related conditions.
- Existing wireless plantar pressure systems face challenges in achieving reliable and precise measurements.
- Sensor distribution and layout are critical factors influencing the accuracy of in-shoe pressure monitoring.
Purpose of the Study:
- To evaluate and compare two distinct discrete sensor layouts for accurate plantar pressure analysis using wireless in-shoe devices.
- To determine the optimal sensor configuration for reliable monitoring in research and clinical settings.
- To assess the accuracy of wireless plantar pressure systems against a gold-standard force platform.
Main Methods:
- Ten healthy volunteers underwent plantar pressure analysis using a wireless in-shoe system (W-inshoe®) with two sensor layouts.
- Measurements of barycenter of pressures (BoP) and vertical ground reaction force (vGRF) were compared between the in-shoe system and an AMTI force platform.
- Correlation analyses (Spearman's rank correlation coefficient - SCC) were performed to assess agreement in medial-lateral (ML) and anterior-posterior (AP) directions, and for vGRF.
Main Results:
- Both tested sensor layouts demonstrated good correlation with force platform data for BoP and vGRF.
- The second sensor layout achieved particularly high correlations: ML SCC=0.95, AP SCC=0.99, and vGRF SCC=0.91.
- Adjusted placement of removable sensors is identified as key for achieving accurate plantar pressure measurements.
Conclusions:
- An optimized sensor layout in wireless in-shoe systems significantly enhances the accuracy of plantar pressure analysis.
- These findings support the use of low-cost, wireless systems for long-term, real-time plantar pressure monitoring outside traditional lab settings.
- The study provides a foundation for improved diagnostic tools and personalized interventions based on detailed foot pressure data.
