Enhanced Interstitial Fluid Extraction and Rapid Analysis via Vacuum Tube-Integrated Microneedle Array Device

Area of Science:

• Biomedical Engineering
• Point-of-Care Testing (POCT)
• Microneedle Technology

Background:

• Developing point-of-care testing (POCT) sensors using interstitial fluid (ISF) faces challenges in rapid sampling and analysis.
• Existing methods for ISF extraction can be invasive or inefficient, hindering real-time health monitoring.
• Need for user-friendly, mobile systems for decentralized healthcare applications.

Purpose of the Study:

• To introduce an innovative strategy for efficient interstitial fluid (ISF) extraction and analysis.
• To develop a user-friendly, integrated system for rapid, minimally invasive glucose monitoring.
• To enhance the capabilities of point-of-care testing (POCT) for decentralized personal healthcare.

Main Methods:

• Utilized a 3D-printed, hollow microneedle array patch (MAP) combined with a vacuum tube (VT) system.
• Employed negative pressure from the VT to extract ISF from a live rabbit ear model.
• Integrated custom sensing papers within the system for analyte detection and quantification using personal healthcare meters.

Main Results:

• Successfully extracted approximately 18 µL of ISF from a rabbit ear within 5 minutes.
• Enabled immediate, minimally invasive measurement of glucose levels.
• Demonstrated the system's potential for mobile, user-friendly ISF analysis without specialized medical expertise.

Conclusions:

• The integrated VT-MAP system significantly improves ISF extraction efficiency and analysis speed.
• This technology offers a user-friendly and mobile solution for decentralized glucose monitoring.
• The system holds substantial potential for advancing personal healthcare and point-of-care diagnostics.