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Updated: Jul 12, 2026
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Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
Published on: April 25, 2013
Measuring Perfusion Pressure and Flow Resistance in a Microfluidic Device Using an External Optical System.
Matthew C Coughlin1,2, Marie A Floryan3,4, Giovanni S Offeddu3,4
1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115.
Journal of Micro and Nano Science and Engineering
|July 10, 2026
Summary
Researchers developed a novel optical system to measure fluid flow and pressure in microphysiological systems (MPS). This advancement allows for accurate quantification of physical forces, crucial for replicating human disease pathology in vitro.
Area of Science:
- Biomedical Engineering
- Microfluidics
- Physiological Systems Modeling
Background:
- Vascularized microphysiological systems (MPS) are increasingly used to study human disease pathology.
- Accurate replication of physiological function in MPS requires appropriate physical forces on cellular components.
- Quantification of physical forces, particularly fluid dynamics, within MPS has been a significant challenge.
Purpose of the Study:
- To develop a simple, robust, and optically-based system for quantitative characterization of fluid flow in MPS.
- To measure both driving fluid pressure and flow resistance within microphysiological platforms.
- To ensure the system is compatible with long-term biological studies requiring maintained sterility.
Main Methods:
- An optically-based system was designed to interface with existing pumps for quantitative flow assessment.
- The system measured fluid pressure and flow resistance through microphysiological platforms, including glass capillary tubes and model vascular networks.
- Benchmarking involved comparison with hydrostatic methods and theoretical predictions for laminar flow.
Main Results:
- The developed system demonstrated excellent qualitative and quantitative agreement with established resistance measurement techniques.
- Measurements of driving pressure and vascular resistance in an MPS within an incubator were consistent with published data.
- The non-contact optical nature of the system preserves sterility, making it suitable for prolonged biological experiments.
Conclusions:
- A novel, non-invasive optical system effectively quantifies fluid pressure and resistance in microphysiological systems.
- This technology enhances the physiological relevance of MPS by enabling precise control and measurement of physical forces.
- The system provides a valuable tool for advancing in vitro models of human disease pathology and vascular research.
