A conceptual framework for predicting and addressing the consequences of disease-related microvascular dysfunction

Area of Science:

• Physiology
• Biomedical Engineering
• Pathology

Background:

• Impaired microvascular perfusion is implicated in various diseases.
• Understanding the specific microvascular parameters and their impact on mass transport is crucial for disease management.

Purpose of the Study:

• To define critical aspects of microvascular perfusion.
• To identify mass transport processes affected by microvascular dysfunction.
• To explore potential therapeutic interventions.

Main Methods:

• Development of a theoretical model for microvascular perfusion and solute flux.
• Integration of mass transport and anatomical principles.
• Application of the model to predict relationships between perfusion parameters and solute flux.

Main Results:

• Model predicts bulk blood flow is crucial for convection-limited exchange (e.g., oxygen uptake).
• Model predicts perfused capillary density is vital for diffusion-limited exchange (e.g., insulin action).
• Model accurately predicts mass transport defects in diseases like insulin resistance.

Conclusions:

• A minimal mathematical model can describe microvascular perfusion's contribution to solute flux.
• Findings offer a basis for developing targeted therapies for microvascular dysfunction.