A wearable microfluidic system for efficient sweat collection and real-time detection

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Analytical Chemistry

Background:

• Sweat analysis offers valuable physiological insights for health monitoring.
• Wearable sweat sensors provide non-invasive, continuous, and real-time data.
• An integrated system for efficient sweat collection and detection is currently lacking.

Purpose of the Study:

• To fabricate a wearable microfluidic system for real-time sweat collection and analysis.
• To enable simultaneous detection of multiple sweat biomarkers.
• To demonstrate the system's potential for non-invasive human health monitoring.

Main Methods:

• Fabrication of a four-layer wearable microfluidic system (skin adhesive, microfluidic, electrode, capping layers).
• Utilized a screen-printed sweat sensing array for biomarker detection.
• Conducted human testing during exercise to validate continuous monitoring capabilities.

Main Results:

• Achieved an efficient sweat collection rate of approximately 0.79 μL/min.
• Demonstrated high-precision, simultaneous detection of sodium (Na+), potassium (K+), and glucose.
• Exhibited good repeatability and stability with a relative standard deviation of sensitivity below 5%.

Conclusions:

• The developed wearable microfluidic system efficiently collects and analyzes sweat in real-time.
• The system enables continuous monitoring of key biomarkers (Na+, K+, glucose) during exercise.
• This technology holds significant potential for non-invasive human health assessment.