Trocar assembly with obturator and retractable stylet

摘要

A surgical system for penetrating tissue includes an obturator having an obturator housing and an obturator member extending from the obturator housing and having a penetrating member adapted to penetrate tissue. The penetrating member defines an outer wall with an irregular surface dimensioned to facilitate passage through tissue. The obturator may further include a stylet at least partially disposed within the obturator member. The stylet and the obturator member are adapted for relative longitudinal movement between a first relative position corresponding to an unarmed condition of the penetrating member and a second relative position corresponding to an armed condition of the penetrating member.

主权项

1. A surgical system for penetrating tissue, which comprises:
an obturator including an obturator housing and an obturator member extending from the obturator housing and defining a longitudinal axis, the obturator member having a penetrating member dimensioned and adapted to penetrate tissue, the penetrating member defining a substantially continuous annular outer wall having a plurality of longitudinal recessed surface portions, the longitudinal recessed portions extending toward a beveled penetrating tip and being in oblique relation to the longitudinal axis, adjacent recesses being in radial spaced relation, the recessed portions dimensioned to receive tissue displaced during advancement of the penetrating member to facilitate passage through tissue; wherein the penetrating member includes a tapered section having the plurality of longitudinal recessed surface portions, and a cylindrical section extending from the tapered section to the beveled penetrating tip.