Battery-Free, Wireless Multi-Modal Sensor, and Actuator Array System for Pressure Injury Prevention.

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Sensor Technology

Background:

• Preventing pressure injuries requires monitoring critical parameters like pressure, shear, and temperature at bony prominences.
• Developing wireless sensor arrays for accurate risk factor mapping is challenging due to miniaturization and integration difficulties.

Purpose of the Study:

• To introduce a battery-free, wireless, miniaturized multi-modal sensor array for continuous mapping of pressure, shear, and temperature at skin interfaces.
• To enable analysis of the interplay among these factors in response to patient movement and posture.

Main Methods:

• Development of an integrated pressure and shear sensor using 3D strain gauges and micromachined components.
• A mechanically decoupled sensor design for reliable, direct data acquisition.
• Validation using a novel combination of wireless sensor arrays and a customized pneumatic actuator.

Main Results:

• The sensor platform successfully maps pressure, shear, and temperature continuously at skin interfaces.
• Demonstrated efficacy in analyzing the interplay of monitored parameters.
• Validation trials showed effective pressure and shear redistribution without patient repositioning.

Conclusions:

• The developed sensor array is effective for continuous monitoring and management of pressure injury risk factors.
• This technology offers a pathway to improve patient quality of life through enhanced care.
• The miniaturized, multi-modal, wireless sensor addresses limitations in current wearable sensor technology.