Endovascular　stents　are　one　of　the　minimally　invasive　modern　techniques　for　the　treatment　of　aortic　arch　aneurysms.　With　the　implantation　of　stent　bridging　the　aneurysmal　orifice,　the　side　branches　at　the　aortic　arch　may　be　covered　by　the　stent　filaments,　which　will　influence　the　blood　perfusion　to　these　branches.　We　propose　a　novel　approach　to　stenting　treatment　for　aortic　arch　aneurysms　with　partly　bridged　endovascular　stent　to　avoid　the　abovementioned　situation.　The　objectives　of　the　study　were　to　construct　a　nonstented,　a　fully　stented　and　a　partly　stented　aortic　arch　aneurysm　models　harboring　blebs　on　their　domes,　demonstrate　the　detailed　flow　patterns,　pressure　and　wall　shear　stress　distributions　around　the　aneurysm,　and　examine　whether　partly　stented　aneurysms　have　preferable　intra-aneurysmal　hemodynamics　for　thrombus　and　occlusion.　The　physiologic　blood　flows　around　the　aortic　arch　aneurysms　were　simulated　using　the　method　of　computational　fluid　dynamics.　The　hemodynamics　in　the　three　designed　models　were　analyzed　and　compared.　The　simulation　results　showed　substantial　differences　in　flow　patterns　between　the　stented　and　nonstented　models　inside　the　aneurysmal　sacs.　However,　the　fully　stented　and　the　partly　stented　models　feature　similar　hemodynamics.　Flow　activities　inside　the　partly　stented　aneurysm　model　were　also　significantly　diminished,　specifically　the　pressures　and　wall　shear　stresses　in　the　bleb　were　decreased,　thus　promoting　intraaneurysmal　thrombus　development　and　attenuating　aneurysm　rupture　risk.　The　present　simulation　study　indicated　that　partly　bridged　endovascular　stents　seem　to　offer　a　feasible　technique　in　the　effective　treatment　of　aortic　arch　aneurysms.