Fully integrated wearable sensor arrays for multiplexed in situ perspiration analysis

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Personalized Medicine

Background:

• Wearable sensors are crucial for personalized medicine, offering continuous health monitoring.
• Non-invasive sweat analysis provides rich physiological data but current sensors have limitations.
• Existing sweat biosensors often lack multiplexed analysis and on-site signal processing.

Purpose of the Study:

• To develop a fully integrated, flexible sensor array for multiplexed in situ perspiration analysis.
• To overcome limitations of single-analyte sensors and enable accurate, real-time physiological assessment.
• To bridge the gap between biosensing and integrated signal processing for advanced wearable diagnostics.

Main Methods:

• Developed a mechanically flexible sensor array for simultaneous sweat analysis.
• Integrated plastic-based sensors with silicon integrated circuits on a flexible circuit board.
• Incorporated on-site signal conditioning, processing, and wireless transmission capabilities.

Main Results:

• The system selectively measures sweat metabolites (glucose, lactate) and electrolytes (sodium, potassium).
• Skin temperature is monitored for sensor response calibration, ensuring accuracy.
• Demonstrated real-time assessment of physiological states in subjects during physical activity.

Conclusions:

• The integrated wearable system enables comprehensive, real-time sweat profiling.
• This platform overcomes previous technological limitations in wearable biosensing.
• It paves the way for diverse personalized diagnostic and physiological monitoring applications.