- Subject undergoing peripheral vascular surgery, ie, conduit placement with an ePTFE graft such as arterio-arterial bypasses [including: axillo-femoral, ilio-femoral, femoro-femoral, ilio-popliteal, femoro-popliteal (including below knee), femoro-tibial vessel bypass], or arteriovenous dialysis access shunt in the upper or lower extremity.