There is in obstruction chamber weight admittance tube assembly for opening blood vessel under a kind of inner membrance. The conduit tube component includes hub unit, it is stretched out including inner and outer tubular component in catheter shaft distal end, from the hub assembly, the distal portions that expandable structure is installed on catheter shaft configured between driving fold and unfold configuration by the inner tubular member of longitudinal movement relative to tubular element. What the conduit tube component was configured to each layer vascular wall entered between subintimal space adjacent tissue passes through the distal end occlusion that promotes the distal end of puncture component to enter from the inner tubular member of the inner cavity and across tissue vessel lumen to be conducive to enter back into vessel lumen.
