Fibrin Adsorption on Cardiovascular Biomaterials and Medical Devices.

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Surface Chemistry

Background:

• Medical devices in blood vessels risk thrombosis due to protein adsorption and clot formation.
• Fibrinogen adsorption and polymerization initiate surface-induced coagulation, posing a challenge for biomaterial design.
• Minimizing thrombotic complications requires understanding surface-dependent fibrinogen recruitment.

Purpose of the Study:

• To characterize thrombogenic properties of cardiovascular biomaterials.
• To quantify surface-dependent fibrinogen adsorption and fibrin formation.
• To analyze fibrin morphologies on different biomaterials and medical devices.

Main Methods:

• Quantified fibrinogen adsorption on various metallic and polymeric biomaterials.
• Analyzed fibrin formation and resulting morphologies.
• Utilized vascular guidewires as clotting substrates to assess device-specific adsorption.

Main Results:

• Stainless steel and amorphous fluoropolymer exhibited significantly lower fibrinogen recruitment compared to other materials.
• Fibrin formed distinct fiber structures on metallic surfaces and fractal branched structures on polymeric surfaces.
• Fibrin adsorption on guidewires depended on exposed surface areas, correlating with stainless steel morphologies.

Conclusions:

• Stainless steel and amorphous fluoropolymer are promising biomaterials for cardiovascular devices due to reduced fibrinogen adsorption.
• Understanding fibrin morphology provides insights into device-surface interactions and thrombogenicity.
• Surface properties and exposed areas of medical devices influence thrombosis risk.