摘要
提取牛皮Ⅰ型胶原蛋白,以4mg/ml的胶原蛋白溶液涂层苏州涤纶人工血管,经过0.3％戊二醛交联,涤纶血管渗水量由383±28ml·min^(-1)/cm^2降至2.8±0.5ml·min^(-1)/cm^2。将胶原蛋白涂层涤纶血管移植犬腹主动脉下段,以白蛋白涂层涤纶血管移植为对照。在肝素化状态下均不渗血。术后30天和90天观察显示,胶原涂层涤纶血管内壁覆盖一层完整光滑的内膜,光镜显示为纤维结缔组织,表面有内皮细胞被覆并与自体动脉内膜延续。而白蛋白涂层涤纶血管血栓形成率高,内壁纤维素沉积。临床采用胶原涂层涤纶血管为4例马凡综合征病人行主动脉根部替换,术中涤纶血管不渗血,随访3个月无不良反应。本研究显示胶原涂层涤纶血管机械性能良好,不渗血,尤其能促进涤纶血管的愈合。作为主动脉移植材料可广泛应用于临床,若用于中小血管移植可望提高远期通畅率。
Dacron graft impregnated with 4mg/ml purified type I collagen harvested from bovine skin was crosslinked with O.3% glutaraldehyde. The water porosity decreased from 383+28ml . min-1/cm2to 2. 8+0. 5ml . mm-1V/cm2. The in-frarenal abdominal aorta of 16 mongreal dogs was replaced with 4cm X 0. 8cm Decron grafts (8 collagen-coated and 8 autoclaved albumin for control)>No interstitial bleeding occurred in either type of grafts. By gross observation and under light microscopy, a smooth neointima was noticed on the surface of collagen coated grafts 30 and 90 days after implantation. In a series of 4 patients with Marfan's syndrome undergoing replacement of the aortic root, hemorrhage through the interstices of the graft was virtually eliminated. There was no complication in any patient after a follow up of 3 months. This study reveals that collagen-coated dacron grafts were totally impervious to blood during and after implantation. The collagen coating can promoting cell growth and graft healing and does not interfere with the physical properties of the dacron grafts. As a prosthesis of aorta replacement , it may be applied clinically with safety. If it is used as small diameter vascular prosthesis,the long-term patency may be improved.
出处
《中华胸心血管外科杂志》
CSCD
北大核心
1995年第5期311-313,共3页
Chinese Journal of Thoracic and Cardiovascular Surgery
