Abstract
Braided tubes were constructed evenly and processed by means of alkaline reduction method to produce porosity. 4mm I. D. and 12-18cm long grafts were implanted to bypass from left subclavian artery to coeliac trunk by end to end fashion in the chest cavity of dogs. Porosity of the stretched graft is minimal enough to prevent bleeding through meshes at the time of implantation and biological porosity will be produced as the graft shortening develops in a long time. 40% of patency was obtained in the group of 65%-reduction as well as in the control 5-7 months after implantation. Improved patency rate will be obtained by approximation of graft compliance to that of the host artery.
