Pressure sensors used as bioimpedance plantar electrodes: a feasibility study

Foot impedance plethysmography was implemented using two types of electrodes (dry and capacitive) and sole force sensors. The latter are commonly used for assessing diabetic foot ulcers (DFU). For impedance plethysmography, a tetrapolar configuration has been used with three different plantar setups: four skin contact electrodes, four capacitive contact electrodes and two Force Sensing Resistors (FSRs). In this work, FSRs have been considered as possible capacitive electrodes because the top substrate contains interdigitating conductive electrodes and a semiconductive polymer. All the measurements have been performed using a 1 mA/10 kHz excitation current and have been tried under the feet of a standing person to detect impedance plethysmography signals. Contact electrodes allow a good cardiac pulse signal while capacitive contact through the socks features mains interferences. Force sensing resistors with their force-dependent resistance in parallel to the capacitive coupling, were not able to detect cardiac pulse. But promising results can be anticipated from these findings provided higher frequencies are used and larger sensor areas to help detect altered skin states in diabetic foot.

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Conductive ink vs force sensing resistors in plantar pressure soles: WalkinSense®, MyCareShoe® and DIAPODAL

Morales

Martins²,

Silva³

et al. 2023

2023 IEEE International Symposium on Medical Measurements and Applications (MeMeA)

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Pressure sensors used as bioimpedance plantar electrodes: a feasibility study

Cited by 5 publications

References 16 publications

Tactile Sensing of the Rigid-Soft Electromagnetic Feet of the iCrawl Robot for Pipe Size Classification

Tactile Sensing of the Rigid-Soft Electromagnetic Feet of the iCrawl Robot for Pipe Size Classification

Bioimpedance plethysmography with capacitive electrodes and sole force sensors: comparative trial

Conductive ink vs force sensing resistors in plantar pressure soles: WalkinSense®, MyCareShoe® and DIAPODAL

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