The GORE® PROPATEN® Vascular Graft is specifically designed and used to reduce the clinical concerns of higher risks of acute graft thrombotic failure during the vascular procedures. It helps all vascular surgeons to combat the problem of thrombus formation on the luminal surface of a vascular graft. The CARMEDA® BioActive Surface (CBAS® Surface), a proprietary end-point attachment mechanism, serves to anchor heparin molecules to the luminal surface while still maintaining heparins intrinsic BioActive properties to result in a thromboresistant bioactive graft surface that retains its bioactive properties. This Vascular Graft demonstrated improved thromboresistance and patency compared to standard ePTFE grafts in pre-clinical in vivo tests.