| 摘要 |
<p>A trocar system (10) includes a cannula (1000) having a cannula housing (1002) and a cannula sleeve (1004) extending from the cannula housing, and an obturator (100) at least partially positionable within the cannula. The obturator includes an obturator housing (102) adapted for mating with the cannula housing (1002), an obturator shaft (104) connected to the obturator housing (102) and receivable within the cannula sleeve (1004), an obturator blade (190) connected to the obturator shaft (104), a protective member (114) including a protective guard (120) coaxially mounted about the obturator blade (190) and a latch member (156) associated with the obturator housing (102) and operatively connected to the protective guard (120). The obturator shaft (104) and the obturator blade (190) are adapted for relative rotational movement. The protective guard (120) is adapted for longitudinal movement between a first position substantially enclosing the obturator blade (190) and a second position to at least partially expose the obturator blade (190). The latch member (156) is moveable from an initial position securing the protective guard (120) in the first position to an actuated position operatively releasing the protective guard (120) to permit the protective guard (120) to move to the second position thereof. The latch member (156) is preferably adapted to move to the actuated position upon mating of the obturator housing (102) and the cannula housing (1002).</p> |
