From the first body tube cavity as for the catheter for penetrating and expansion the passage to the second body tube cavity, the extended point of the petering out condition which is in the distal (2036) edge of the catheter itself and the catheter itself, it has in the groove which is the distal (2036) edge of the development possible fixed vessel, and the catheter itself which, are prepared for the distal (2036) edge vicinity of the round trip possible needle and the needle which are prepared for the central passage of the catheter itself it includes the advance possible blade in the track which was formed to axial direction at the same time alongside the needle. That catheter can be used by penetrating the tube cavity wall which it adjoins advance of the first needle, and advance of the extended vessel which exceeds the needle, grant of tension of proximal direction in order to keep the organizational layer which it develops and adjoins of the fixed vessel which follows to that together, by the advance of the blade and the extended vessel which in order then to expand the passage sufficiently are exposed.第一の体管腔から第二の体管腔への通路の貫通および拡張のためのカテーテルは、カテーテル本体、カテーテル本体の遠位端にある先細り状の拡張先端部、カテーテル本体の中央通路に備えられた往復可能な針、針の遠位端近くに備えられた展開可能な固定器、およびカテーテル本体の遠位端にある溝において備えられ、かつ針に沿って軸方向に形成された軌道において前進可能な刃を含む。最初の針の前進、および針を越える拡張器の前進、それに続く固定器の展開、隣接する組織層を一緒に保持するための近位方向の張力の付与、それから通路を十分に拡張するための露出した刃と拡張器の前進により、そのカテーテルは、隣接する管腔壁を貫通することに使用され得る。
