Aortobifemoral bypass surgery is used to bypass diseased large blood vessels in the abdomen and groin. To bypass the blocked blood vessel, blood is redirected through a graft made of synthetic material is sewn to the existing artery. The artificial blood vessel is formed into a Y shape. The single end of the Y is sewn on the aorta. The two split ends of the Y are sewn below the blocked or narrowed areas of the femoral arteries. This allows the blood to travel around (bypass) the diseased areas.