SCANNING ELECTRON-MICROSCOPY EVALUATION OF POROUS AND NONPOROUS ARTERIAL SUBSTITUTES

  • 1 January 1982
    • journal article
    • research article
    • Vol. 155  (3) , 358-362
Abstract
The fate of 2 different kinds of new small arterial substitutes, porous and nonporous, was compared particularly with regard to the structure of the luminal surface. Twenty-eight weavenit Dacron pyrolytic carbon coated grafts and 28 glutaraldehyde-tanned human umbilical vein segments were implanted into the carotid arteries of dogs. Grafts were removed at intervals, from 10 to 120 days after implantation, and examined by scanning electron microscopy. The cumulative patency rate was 96.4% for Dacron and 85.7% for umbilical vein grafts. Ten days after implantation, the Dacron grafts were uniformly covered by a thin thrombus layer, while the umbilical covered by a thin thrombus layer, while the umbilical vein grafts showed a thin network of fibrin on the central portion of the luminal surface of the graft and thrombotic deposits at the anastomoses. Thirty days after implantation, both types of prostheses showed the development of a thin fibrous tissue layer on the inner surface. Finally at 120 days, an endothelial lining was observed.

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