Photopolymerization strategy for the preparation of small-diameter artificial blood vessels with micro-nano structures on the inner wall.Although large diameter vessels made of polyurethane materials have been widely used in clinical practice, the biocompatibility and long-term patency of small diameter artificial vessels have not been well addressed. 
photopolymerization
Here a novel technique is used to produce artificial blood vessels with a caliber of less than 6 mm and a wall thickness of less than 0.5 mm by rotational exposure, and to form a bionic inner wall with a periodically micro-nano structure inside the tube by laser double-beam interference. 
laser double-beam interference