[Experimental evaluation of two-sided velour vascular prostheses of Polish production].

The experiments were performed on nine mongrel dogs. The authors used straight crenated grafts of diameters 6 and 12 mm. In 6 dogs were implanted into abdominal aorta below an origin of renal arteries and above its bifurcation. Autopsy was performed after 49, 62, 98 days. The authors evaluated the implant examining it with two methods: macroscopic and histopathologic. In addition were 6 experiments made with three dogs. The grafts were placed extracorporealy between canulated artery and femoral vein. The authors measured the volume of transudated blood, the time of transudation and degree of grafts flexibility marked by the alongation. In was stated that tested double veloured grafts of Polish production are softer and more flexible than those produced so far. The edges of the tested grafts have higher shred resistance during the sewing procedure. Their more regular texture results in smaller degree of transudation: after initial typical preclotting the grafts "sweat" evenly and quickly stops the transudation. In authors opinion the grafts should be clinically evaluated in treatment of peripheral blood vessels diseases.