A catheter system and corresponding methods are provided for accessing a blood vessel true lumen from a sub-intimal plane of the vessel. The catheter includes components that are symmetric about the longitudinal axis and allow for reentry without the need to ensure a correct orientation of the cannula.一導管系統及對應的方法被提供用於由該脈管之血管內膜下的平面進出血管真腔。該導管包括繞著該縱軸為對稱的零組件,且允許用於重新進入,而不需要確保該插管之正確定向。100‧‧‧導管系統102‧‧‧導管主體104‧‧‧遠側端106‧‧‧近側端107‧‧‧第一端部109‧‧‧第二端部110‧‧‧可偏向外殼111‧‧‧硬化區段112‧‧‧導管把手131‧‧‧中空管狀部份140‧‧‧止血配件142‧‧‧配件148‧‧‧側面通口GW‧‧‧導絲
