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Related Experiment Video

Updated: Jul 15, 2026

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

Published on: June 1, 2012

Microneedle-based skin patch for blood-free rapid diagnostic testing.

Xue Jiang¹, Peter B Lillehoj^1,2

¹Department of Mechanical Engineering, Rice University, Houston, TX 77005 USA.

Microsystems & Nanoengineering

|November 16, 2020

Summary

A new microneedle skin patch offers rapid, minimally invasive detection of infectious disease biomarkers in dermal fluid. This simple, equipment-free test enhances point-of-care diagnostics, overcoming limitations of traditional blood sampling methods.

Keywords:

Engineering Nanoscience and technology

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Area of Science:

Biomedical Engineering
Point-of-Care Diagnostics
Biosensor Technology

Background:

Rapid diagnostic tests are crucial for infectious disease screening, especially in developing nations.
Current methods often rely on finger-prick blood sampling, posing challenges like infection risk and difficulties with specific populations.
There is a need for simpler, less invasive, and equally effective diagnostic tools.

Purpose of the Study:

To develop and validate a novel microneedle-based skin patch for rapid detection of protein biomarkers.
To demonstrate the feasibility of using dermal interstitial fluid for diagnostic testing.
To enhance the sensitivity of lateral flow assays for point-of-care applications.

Main Methods:

Utilized a microneedle array to extract dermal interstitial fluid.
Integrated fluid extraction with an antibody-based lateral flow test strip for colorimetric antigen detection.
Applied a gold enhancement technique to improve assay sensitivity.
Validated the device for detecting *Plasmodium falciparum* histidine-rich protein 2.

Main Results:

Successfully detected *Plasmodium falciparum* histidine-rich protein 2 at concentrations as low as 8 ng/mL.
Demonstrated a complete test in under 20 minutes without requiring external equipment.
Confirmed the mechanism of gold enhancement for improved sensitivity.
Established proof-of-concept for microneedle-based lateral flow assay in dermal interstitial fluid.

Conclusions:

The microneedle skin patch provides a simple, minimally invasive, and cost-effective method for rapid protein biomarker detection.
This technology overcomes the limitations associated with traditional blood-sampling diagnostic tests.
The platform is adaptable for detecting various protein biomarkers, showing significant potential for point-of-care diagnostics.