Abstract
Two expanded polytetrafluoroethylene grafts were placed in the abdominal aorta and the external iliac arteries of dogs or the femoral arteries of does. The animals were sacrificed at varying intervals from one day to seven months. The patency rates of the Gore-Tex grafts were 57% in the case of 4mm. diameter, 69%, 5mm. diameter and 75%, 6mm. diameter. The thickness of the neointima of the grafts were variable in early stage. Organization of the grafts were poor. There remain some problems at the site of anastomosis.
