LC Wireless Sensitive Pressure Sensors With Microstructured PDMS Dielectric Layers for Wound Monitoring

Mechanical pressures affect the rate and quality of dermal wound healing. It is therefore important to continuously monitor the mechanical pressure on a wound site so as to evaluate neovascularization and cellular proliferation under pressure. Based on an LC (inductor-capacitor) passive wireless pri...

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Bibliographic Details
Published in:IEEE sensors journal 2018-06, Vol.18 (12), p.4886-4892
Main Authors: Deng, Wen-Jun, Wang, Li-Feng, Dong, Lei, Huang, Qing-An
Format: Article
Language:English
Subjects:
Dielectrics
Monitoring
passive wireless sensor
pressure monitoring
Pressure sensors
smart bandage
Wireless communication
Wireless sensor networks
Wound management
Wounds
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Summary:Mechanical pressures affect the rate and quality of dermal wound healing. It is therefore important to continuously monitor the mechanical pressure on a wound site so as to evaluate neovascularization and cellular proliferation under pressure. Based on an LC (inductor-capacitor) passive wireless principle, this paper presents the design, fabrication, and measurement of LC sensors embedded in a commercial bandage. Pyramidal polydimethylsiloxane elastomers used as the dielectric of the capacitive pressure sensor were fabricated by using a silicon anisotropic etching mold. Simulation and analysis of the LC sensor and wound environment effects were performed. The sensor embedded in the bandage stuck on the skin was measured, showing that its resonant frequency changes according to a linear function of applied pressure in a range of 0-200 mmHg with a sensitivity of -270.8 kHz/mmHg. The demonstrated LC sensor is completely flexible and wearable, which is proper for the future smart bandage.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2018.2831229