Small Diameter Blood Vessels With Controllable Micropore Structure Induced By Centrifugal Force For Improved Endothelialization

The micropore structure is prerequisite for fast and durable endothelialization of artificial small diameter blood vessels (ASDBVs). Although some methods, such as salt leaching, coagulation, and electrospinning, have been developed to construct micropores for ASDBVs, the uncontrollability of the structure and the complicated procedures of the process are still the issues to be concerned about. In this study, a compact device based on the principle of centrifugal force is established and used to prepare polyurethane (PU) ASDBVs with micropore structures by blasting different porogens. It is found that the glass beads could construct micropores with regular round shape, uniform distribution, and controllable size (60-350 mu m), which significantly improves the endothelialization of PU-based ASDBVs, especially when the pore size is about 60 mu m. This method is easy-accessible and wide-applicable, which provides a new pathway for the research and development of ASDBVs.