| 主权项 |
1. A cannula assembly, comprising:
a cannula including:
a housing having a seal dimensioned to establish a seal about an object introduced therethrough; andan elongated shaft dimensioned to access tissue, the elongated shaft having a lumen extending therethrough, the elongated shaft defining a longitudinal axis and having proximal and distal ends, the elongated shaft including a first shaft segment having a first pre-determined configuration and a second shaft segment distal of the first shaft segment, the second shaft segment being rigid and having a second pre-determined configuration different from the first pre-determined configuration; and an obturator including:
an elongated body adapted for insertion through the lumen of the elongated shaft, the elongated body having proximal and distal ends and including a first body segment having a configuration in general accordance with the first pre-determined configuration of the first shaft segment and a flexible second body segment selectively adaptable to conform to the second pre-determined configuration of the second shaft segment upon insertion through the lumen of the elongated shaft. |
