Related Experiment Video
Updated: May 30, 2026
07:53
Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
Published on: April 25, 2013
Note: Reflection-type micro multipoint laser Doppler velocimeter for measuring velocity distributions in blood
H Ishida1, D Kobayashi, H Shirakawa
1Toyama National College of Technology, 1-2 Ebie-Neriya, Imizu, Toyama 933-0293, Japan. ishida@nc-toyama.ac.jp
The Review of Scientific Instruments
|August 3, 2011
Summary
Researchers adapted a laser Doppler velocimeter (LDV) for blood flow measurement. This reflection-type LDV system successfully used red blood cells as seeding particles, showing promise for clinical applications.
Area of Science:
- Biomedical Engineering
- Fluid Dynamics
- Optical Measurement Techniques
Background:
- Accurate measurement of blood flow velocity is crucial for diagnosing and monitoring various cardiovascular conditions.
- Traditional Laser Doppler Velocimetry (LDV) methods often require transmission through the vessel, limiting clinical applicability.
- Developing non-invasive or minimally invasive techniques for in-situ blood flow analysis is an ongoing challenge.
Purpose of the Study:
- To develop and validate a reflection-based Laser Doppler Velocimeter (LDV) system for measuring velocity distributions in blood vessels.
- To adapt existing transmission-based LDV technology for enhanced clinical suitability.
- To assess the feasibility of using erythrocytes as natural seeding particles for micro-flow velocimetry.
Main Methods:
- Conversion of a transmission-based LDV system into a reflection-based configuration.
- Utilizing a serpentine flow channel to generate complex flow patterns for testing.
- Qualitative comparison of experimental velocity distribution images with numerical simulation results.
- System evaluation through the measurement of blood injection into a glass tube using a syringe pump.
Main Results:
- The reflection-based LDV system was successfully developed and configured for potential clinical use.
- Velocity distribution patterns in a serpentine flow channel were qualitatively consistent with numerical predictions.
- Erythrocytes (red blood cells) were demonstrated to be effective seeding particles for the reflection-type micro-multipoint LDV.
- The system provided useful data for evaluating blood flow dynamics in a controlled experimental setup.
Conclusions:
- The developed reflection-type micro-multipoint LDV is a viable tool for measuring blood flow velocity distributions.
- Erythrocytes serve as suitable endogenous seeding particles, simplifying sample preparation for clinical measurements.
- The system's performance suggests its potential utility as a diagnostic aid in clinical settings.
- The study provides foundational data for the advancement of optical methods in vascular diagnostics.
