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Updated: Jul 5, 2025
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Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
864
Separation of platelets by size in a microfluidic device based on controlled incremental filtration
Mai T P Dinh1, Anton Mukhamedshin1, Kumar Abhishek1
1Department of Biomedical Engineering, University of Houston, 3605 Cullen Blvd, Houston, TX 77204-5060, USA. sshevkoplyas@uh.edu.
Lab on a Chip
|January 24, 2024
Summary
A new microfluidic device offers a gentler method for separating platelets by size, crucial for advancing transfusion medicine and pediatric care. This controlled incremental filtration (CIF) method avoids platelet activation common with traditional centrifugation.
Area of Science:
- Biomedical Engineering
- Hematology
- Transfusion Medicine
Background:
- Platelet size correlates with biological and functional differences, impacting transfusion medicine.
- Current methods like centrifugation activate and aggregate platelets, hindering research and clinical applications.
- Separating platelets by size without compromising their properties is a significant challenge.
Purpose of the Study:
- To develop and validate a microfluidic device using controlled incremental filtration (CIF) for size-based platelet separation.
- To compare the efficacy and platelet properties of the CIF device against traditional centrifugation.
- To assess the potential of CIF for improving platelet research and transfusion practices.
Main Methods:
- Development and testing of a microfluidic device employing controlled incremental filtration (CIF).
- Evaluation of CIF device performance based on design parameters and flow rate using whole blood samples.
- Split-sample study comparing CIF-generated platelet fractions with those from centrifugation, analyzing size distribution, MPV, P-LCR, and activation.
Main Results:
- The CIF device produced 'large platelet' fractions equivalent to centrifugation (similar MPV and P-LCR).
- CIF 'small platelet' fractions contained significantly smaller platelets due to reduced large platelet contamination and retention of the smallest platelets.
- No significant difference in platelet activation was observed between CIF and centrifugation; however, CIF avoided aggregation and the need for extra anticoagulant.
Conclusions:
- The CIF microfluidic device effectively separates platelets by size without causing activation or aggregation, unlike centrifugation.
- CIF offers a continuous, single-step processing method with potential to accelerate platelet function studies.
- This technology could significantly improve platelet transfusion practices, especially for pediatric patients requiring high-quality, low-volume transfusions.
