Abstract
Based on the previous data on the implantation of bias-cut grafts into the thoracic aorta of dogs, experimental study using 4mm I. D. of this type of grafts into the bilateral external iliac arteries was performed to verify the original assumption of maintaining biological porosity close to the original porosity which resists scar contraction.
80% of patency was found both on the bias-cut grafts and on the control side of Microknit grafts by autopsy in a period of 2 years. Histologically, the inner capsule of bias-cut grafts showed a thinner, and more stable layer than those of control grafts did.
Wall structure of bias-cut grafts was found similar to the host artery; inner capsule (intima), graft layer (media), and outer capsule (adventitia).
Good biological porosity with a thin and stable inner capsule found in the bias-cut grafts is unique and advantageous to the development of a small caliber arterial prosthesis.
