[Microangiographical study of arterio-luminal vessels]

Area of Science:

• Vascular anatomy
• Radiology
• Microcirculation

Background:

• Accurate visualization of the microvasculature is crucial for understanding cardiovascular physiology and pathology.
• Traditional injection techniques may face limitations in achieving adequate fluidity and constant pressure for detailed microvascular imaging.

Purpose of the Study:

• To develop and evaluate a novel injectable contrast medium for detailed vascular visualization.
• To characterize different types of arterio-luminal vessels, including previously undescribed ones.

Main Methods:

• A gelatinous mixture of Micropaque (crystallized barium sulphate) with a fluorescent pigment was prepared.
• Vascular injections were performed under constant pressure, maintained near physiological arterial pressure.
• Vessels were examined based on their calibre and unique anatomical features.

Main Results:

• The developed mixture exhibited adequate fluidity for vascular injection.
• Several types of arterio-luminal vessels were identified, including those with calibres of 200 micrometers and intermediate sizes (100-200 micrometers).
• Novel arterio-Thebesian vessels originating from arteriolar branches and arterio-sinusoido-cavity vessels opening into ventricular cavities were described.

Conclusions:

• The Micropaque-based injectable mixture is effective for visualizing microvasculature.
• The study successfully identified and characterized distinct types of arterio-luminal vessels, expanding knowledge of vascular anatomy.
• This technique offers a valuable tool for studying the complex vascular network.