Hemodynamic flow visualization of early embryonic great vessels using μPIV

Area of Science:

• Developmental Biology
• Biomedical Engineering
• Fluid Dynamics

Background:

• Microparticle image velocimetry (μPIV) is crucial for studying blood flow and mechanotransduction.
• Advanced microscopy techniques have enhanced the capabilities of PIV.
• Understanding embryonic vascular development requires precise flow measurements.

Purpose of the Study:

• To present three novel methods for μPIV acquisition in embryonic structures.
• To demonstrate the application of advanced optical imaging in cardiovascular research.
• To accurately monitor cardiac flow dynamics and mechanotransduction during vascular morphogenesis.

Main Methods:

• High-speed confocal scanning of transgenic zebrafish embryos using erythrocytes as tracers.
• Microinjection of artificial seeding particles in chick embryos visualized with stereomicroscopy.
• Real-time, time-resolved optical coherence tomography (OCT) for vitelline vessel flow profiling in chick embryos.

Main Results:

• Successful implementation of three distinct μPIV acquisition strategies.
• Quantitative analysis of cardiac flow dynamics in selected embryonic models.
• Demonstration of μPIV's utility in studying vascular morphogenesis.

Conclusions:

• The presented methods offer powerful tools for quantitative analysis of embryonic cardiovascular systems.
• μPIV, enhanced by advanced imaging, provides unprecedented insights into vascular development.
• This work expands the application of μPIV in developmental biology and biomedical research.