The vascular prosthesis without pseudointima prepared by antithrombogenic phospholipid polymer

Area of Science:

• Biomaterials Science
• Vascular Surgery
• Polymer Chemistry

Background:

• Synthetic vascular prostheses often face thrombosis and occlusion, especially in small diameters.
• Thrombus formation on prostheses can lead to pseudointima, hindering blood flow and clinical application.
• Existing small-diameter prostheses lack clinical applicability due to these limitations.

Purpose of the Study:

• To develop a clinically applicable small-diameter vascular prosthesis using 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers.
• To leverage the antithrombogenic properties of MPC polymers for improved vascular graft performance.
• To overcome the limitations of current small-diameter prostheses by preventing thrombus formation.

Main Methods:

• Prepared vascular prostheses (2mm ID) using a polymer blend of segmented polyurethane and MPC polymer.
• Implanted the MPC-based vascular prostheses into rabbit carotid arteries for evaluation.
• Assessed the luminal surface of retrieved prostheses after eight weeks for thrombus and pseudointima formation.

Main Results:

• The luminal surface of the MPC-based vascular prostheses was clear, showing no thrombus or pseudointima formation after eight weeks.
• The prostheses successfully functioned as blood conduits without adverse thrombotic events.
• Demonstrated the efficacy of MPC polymers in preventing blood coagulation on synthetic vascular surfaces.

Conclusions:

• Vascular prostheses incorporating MPC polymers are a promising solution for small-diameter applications.
• The antithrombogenic nature of MPC polymer-based grafts prevents thrombus and pseudointima formation.
• This technology offers a potential breakthrough for clinically applicable small-diameter vascular grafts.