In　order　to　verify　the　feasibility　of　bypass　graft　treatment　for　DeBakey　III　aortic　dissection,　numerical　simulation　using　computational　fluid　dynamics　method　was　performed　to　compare　the　hemodynamics　of　non-bypassed　and　bypassed　DeBakey　III　aortic　dissection.　The　numerical　results　demonstrated　that　the　flow　activity　and　pressure　in　the　false　lumen　decreased　after　the　implantation　of　bypass　graft,　which　is　profitable　for　the　alleviation　of　dissection　propagation,　and　the　promotion　of　dissection　exclusion.　Thus,　bypass　graft　can　be　an　alternative　for　the　surgical　therapy　of　DeBakey　III　aortic　dissection.　©　2008　IEEE.