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Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing
Published on: June 1, 2012
14.5K
A 3D-printed microneedle extraction system integrated with patterned electrodes for minimally invasive transdermal
Changyuan Zhan1, Fanmao Liu2, Zhiran Shen1
1State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China. chenhuix5@mail.sysu.edu.cn.
Biomaterials Science
|April 14, 2023
Summary
This study introduces a microneedle system for minimally invasive Point-of-Care-Testing (POCT). The novel device enables convenient detection of glucose, pH, and H2O2 in interstitial fluid with minimal pain and tissue damage.
Area of Science:
- Biomedical Engineering
- Biosensors and Nanotechnology
- Point-of-Care Diagnostics
Background:
- Point-of-Care-Testing (POCT) is advancing with biosensor technology.
- Minimally invasive monitoring offers efficient in vivo measurement and reduces patient discomfort.
- Existing methods often involve painful procedures for sample collection.
Purpose of the Study:
- To develop a microneedle (MN) extraction system for minimally invasive detection of bio-analytes.
- To enhance electrochemical sensor performance using patterned electrodes and microneedle arrays.
- To validate the system's efficacy and safety for in vivo interstitial fluid analysis.
Main Methods:
- Fabrication of a 3D-printed hollow microneedle array for painless transdermal fluid extraction.
- Integration of patterned electrodes with micropillar structures and nanomaterial electron layers for improved electrochemical sensing.
- Utilizing negative pressure for interstitial fluid extraction.
- Performing in vitro and in vivo studies to assess detection capabilities and tissue impact.
Main Results:
- The microneedle system successfully extracted interstitial fluid for analysis.
- Patterned electrodes significantly enhanced electrochemical sensor performance.
- The system demonstrated accurate detection of glucose, pH, and H2O2 in a minimally invasive manner.
- In vivo studies confirmed minimal tissue damage and effective analyte detection.
Conclusions:
- The developed microneedle extraction system provides a convenient and minimally invasive approach for Point-of-Care-Testing.
- This technology enhances biosensor performance through patterned electrodes and microneedle integration.
- The system shows significant potential for expanding POCT applications to interstitial fluid analysis with reduced patient discomfort.
