• 1. Department of Cardiovascular Surgery, Dalian University of Technology Affiliated Central Hospital (Dalian Municipal Central Hospital), Dalian, 116000, Liaoning, P. R. China;
  • 2. Institute of Cardiovascular and Cerebrovascular Medicine, Dalian University of Technology, Dalian, Liaoning, 116000, P. R. China;
  • 3. The First Operating Room, Dalian University of Technology Affiliated Central Hospital (Dalian Municipal Central Hospital), Dalian, 116000, Liaoning, P. R. China;
  • 4. School of Materials and Engineering, Dalian University of Technology, Dalian, 116000, Liaoning, P. R. China;
DONG Xufeng, Email: dlmchcsd@126.com; ZHUANG Xijing, Email: dlmchcsd@126.com
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Objective  To select levorotatory polylactic acid (PLLA) and polycaprolactone (PCL) as the main materials, use electrostatic spinning and ultrasonic broaching processing technique to prepare a similar to natural vascular diameter gradient structure of large diameter artificial blood vessels, and evaluate its potential applications. Methods  Using PLLA and PCL as raw materials, through the electrospinning process, using core shafts of different diameters as collection devices, artificial vascular materials with a natural-like structure were constructed. Using end to end anastomosis method to experimental pig thoracic descending aorta replacement of artificial blood vessels. Results  Computed tomography angiography (CTA) results showed that the artificial vascular graft was patent at 1 week and 6 weeks after operation. Animal experimental pathology examination revealed, artificial blood vessels unobstructed, the lining of endothelial cells, and elastic fiber, roughly three layer structure formed similar natural aorta. Artificial blood vessel wall visible elastic fibers, elastic fibers and collagen fibers with natural blood vessels distribution was similar. Immunohistochemical examination showed that the artificial blood vessels had a strong immune response to ERG staining, Actin staining, and Vementin staining. Scanning electron microscopy showed that endothelial cells were formed in the inner layer of the artificial blood vessel. Conclusion  PLLA and photo as raw material, the use of electrostatic spinning and ultrasonic reaming technology preparation of large diameter artificial blood vessels, imitation of natural structure may have potential good flow resistance, good endothelial and may have induced in-situ natural function of angiogenesis.