Geometry optimization of branchings in vascular networks

Area of Science:

• Biomedical Engineering
• Fluid Mechanics
• Tissue Engineering

Background:

• Artificial vascular networks are crucial for tissue cultivation.
• Current designs have rudimentary geometries, limiting long-term biological functionality.
• Geometry influences fluid mechanical stimuli and vessel patency.

Purpose of the Study:

• To perform bioinspired geometry optimization for artificial vascular networks.
• To derive design rules for improved vascular network functionality.

Main Methods:

• Exploited self-similarity properties for simplified analysis.
• Derived design rules using wall shear stress as the command variable.
• Identified key geometrical parameters: branching angle and radius ratio.

Main Results:

• Developed design rules for artificial vascular network branching.
• Numerical parameter values align with experimental observations.
• Optimized geometries enhance fluid mechanical stimuli and prevent vessel occlusion.

Conclusions:

• The derived design rules are beneficial for tissue engineering.
• These rules can aid in diagnosing vascular diseases.
• The findings support the layout of vascular grafts.