Related Experiment Video
Updated: Dec 7, 2025
Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
Published on: February 4, 2011
Fully-automated and field-deployable blood leukocyte separation platform using multi-dimensional double spiral (MDDS)
Hyungkook Jeon1, Bakr Jundi2, Kyungyong Choi3
1Research Laboratory of Electronics, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA. jyhan@mit.edu and Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea.
A novel inertial microfluidic device offers rapid, automated leukocyte separation from blood. This portable platform achieves high purity and concentration, enabling point-of-care applications without electricity.
Area of Science:
- Biomedical Engineering
- Microfluidics
- Hematology
Background:
- Centrifugation is a standard method for blood cell separation but requires bulky equipment and power.
- There is a need for rapid, portable, and efficient methods for isolating white blood cells (WBCs) for point-of-care diagnostics.
Purpose of the Study:
- To develop a fully-automated, portable leukocyte separation platform using a novel multi-dimensional double spiral (MDDS) inertial microfluidic device.
- To evaluate the platform's efficiency in terms of red blood cell (RBC) removal, WBC recovery, purity, and concentration.
- To assess the feasibility of a hand-powered operation for field-friendly applications.
Main Methods:
- Development of a multi-dimensional double spiral (MDDS) inertial microfluidic device.
- Integration of check-valve-based recirculation processes for enhanced separation.
- Testing of both fully-automated and hand-powered operation modes.
- Analysis of WBC purity, RBC removal, WBC recovery, and cell integrity.
Main Results:
- Achieved >99.99% RBC removal and >85% WBC purity with approximately 80% WBC recovery.
- Obtained up to ~12-fold concentrated WBCs from 50 μL of human peripheral blood in under 5 minutes.
- Demonstrated high reliability and repeatability (CV < 5%) with no observed cell damage or phenotypic changes.
- Validated a hand-powered operation with comparable separation efficiency and speed.
Conclusions:
- The MDDS inertial microfluidic platform provides a highly efficient and rapid alternative to centrifugation for leukocyte separation.
- The platform's portability, automation, and optional hand-powered mode make it suitable for diverse point-of-care settings and resource-limited environments.
- This technology facilitates rapid assessment of immune response and blood sample processing at the bedside.
