Related Experiment Video
Updated: May 1, 2026
10:22
High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
Published on: September 2, 2009
13.0K
Bubble-free and pulse-free fluid delivery into microfluidic devices
Yang Jun Kang1, Eunseop Yeom2, Eunseok Seo3
1Center for Biofluid and Biomimic Research, Pohang University of Science and Technology, Pohang, South Korea ; Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, South Korea.
Biomicrofluidics
|April 23, 2014
Summary
This study introduces a novel method for bubble-free and pulse-free fluid delivery in microfluidic devices using density differences and gas compressibility. This technique ensures stable fluid flow, crucial for accurate biological sample analysis.
Area of Science:
- Microfluidics
- Biophysics
- Fluid Dynamics
Background:
- Reliable operation of microfluidic devices depends on bubble-free and pulse-free fluid delivery.
- Existing methods often struggle to maintain stable flow, impacting experimental accuracy.
Purpose of the Study:
- To develop and demonstrate a new method for stable, bubble-free, and pulse-free fluid delivery in microfluidic systems.
- To apply this method for monitoring blood flow dynamics and evaluating cellular properties in microfluidic devices.
Main Methods:
- A fluidic chamber utilizing density differences for gas-liquid separation and gas compressibility for flow stabilization was designed.
- A pinch valve controlled fluid flow into and out of the chamber and microfluidic device.
- The method was validated by monitoring rat blood flow and evaluating red blood cell deformability and platelet aggregation.
Main Results:
- The proposed method successfully achieved stable, bubble-free, and pulse-free fluid delivery.
- Temporal variations in rat blood flow were monitored within a complex microfluidic network.
- Quantitative evaluation of red blood cell deformability and platelet aggregation was demonstrated.
Conclusions:
- The developed method is a promising tool for stable fluid supply, including whole blood, into microfluidic devices.
- This technique enables precise quantification of biophysical blood properties in extracorporeal bypass loops.
- The method enhances the reliability and accuracy of microfluidic-based biological analyses.
