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Disposable integrated microfluidic biochip for blood typing by plastic microinjection moulding
Dong Sung Kim1, Se Hwan Lee, Chong H Ahn
1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong Nam-gu, Pohang, Kyungbuk 790-784, Korea.
Lab on a Chip
|June 2, 2006
Summary
This study presents a low-cost, disposable microfluidic biochip for rapid blood typing. The integrated device efficiently determines blood groups A, B, and AB using minimal blood samples and visual detection within minutes.
Area of Science:
- Biomedical Engineering
- Microfluidics
- Diagnostic Devices
Background:
- Blood typing is crucial for safe blood transfusions.
- Current methods can be time-consuming and require specialized equipment.
- There is a need for rapid, cost-effective, and disposable blood typing solutions.
Purpose of the Study:
- To design, fabricate, and characterize a low-cost, disposable integrated microfluidic biochip for blood typing.
- To enable parallel blood agglutination tests for efficient analysis.
- To achieve rapid and accurate determination of human blood groups.
Main Methods:
- Integration of flow splitting microchannels, chaotic micromixers, reaction microchambers, and multi-step detection microfilters.
- Utilized microinjection molding of cyclic olefin copolymer (COC) and thermal bonding for cost-effective mass production.
- Employed SU-8 photolithography and nickel electroplating for mold insert fabrication.
Main Results:
- Successfully determined human blood groups A, B, and AB visually.
- Required only 3 microliters of whole blood sample.
- Achieved complete blood typing results within 3 minutes.
- Demonstrated parallel testing capability with 2 or 4 tests simultaneously.
Conclusions:
- The fabricated microfluidic biochip offers a rapid, cost-effective, and disposable solution for blood typing.
- The integrated design with efficient mixing and filtering enhances agglutination testing.
- This technology has the potential to improve transfusion safety and accessibility in various settings.
