The Vascular graft can be made in a number of different configurations including straight, bifurcated, branched, and Valsalva. The grafts themselves are frequently made from knit or woven tubes. Woven grafts tend to have the strongest construction and are highly resistant to dilatation. They have a high burst strength and low porosity and are frequently used for thoracic applications. Knitted grafts tend to be a bit easier to handle and are less prone to fraying. They also offer excellent suture retention and, due to the open structure, allow for greater tissue ingrowth than what one sees in a woven graft. Knit grafts are frequently associated with abdominal, ascending, and descending aortic and thoracic applications and peripheral vascular applications. In addition to the graft styles listed above, ATEX Technologies can create precisely-engineered fenestrated grafts as well. Such grafts are so named because the component is designed and manufactured with holes (or fenestrations) located in very specific areas of the graft to allow for blood to flow into the branched arteries of the aorta. Fenestrated abdominal aortic aneurysm stent grafts allow blood to flow unhindered to critical areas of the body such as the kidneys while decreasing pressure on the aneurism, preventing potential aneurism rupture.