Abstract
A 4mm diameter tube made of a woven fabric was produced using ultrafine polyester fibers. The tube was then treated with alkali peeling used to thin the synthetic fiber. After the crimp of wall was processed, the tube assumed a 3.2mm vascular prosthesis. The graft was very soft to the touch, and pliant with a wall thickness as thin as 0.08mm. The physical characteristics of the graft includes a strength factor enough to use for arterial recon-struction. The scanning electron microscope revealed that the inner surface of the graft was a microfine structure consisting of 3.0μm ultrafine fibers. Examination of a graft implantation in mongrel dogs, indicate a patency rate of two to six weeks at 60% without anticoagulant therapy after the operation. The result indicate the small caliber vascular prosthesis we developed has high anti-throm-bogenicity
