An obturator for penetrating tissue includes an outer member defining a longitudinal axis, and having proximal and distal ends, a leading member disposed adjacent the distal end of the outer member and having a tissue contacting outer surface, and a blade mounted adjacent to the leading member. The blade is adapted for at least traversing movement relative to the longitudinal axis to thereby traverse the outer surface of the leading member to facilitate penetrating of tissue during advancement of the leading member within the tissue. The leading member may include an optical window adapted to permit passage of light therethrough for detection by a clinician.組織を貫通するための栓塞子は、縦方向軸を画定し、近位端および遠位端を有する外側部材と、外側部材の遠位端に隣接して配置され、組織接触外面を有する先頭部材と、先頭部材に隣接して載置されるブレードとを含む。ブレードは、少なくとも縦方向軸に対して横断運動に適合され、それにより、先頭部材の外面を横断して、組織内での先頭部材の前進中に組織の貫通を促進する。先頭部材は、臨床医による検出のために、それを通る光の通過を可能にするように適合される光学窓を含んでもよい。
