#$%^&*AU2008202272B220130926.pdf#####ACCESS SHEATH WITH BLADE Abstract A surgical penetrating system (100) includes a cannula (200) and an obturator 5 (204). The cannula (200) has an outer wall (206) arranged about a longitudinal axis and a longitudinal opening (202). At least one substantially linear penetrating member (246) is mounted with respect to the outer wall (206) of the cannula (200) and extends in a general longitudinal direction with respect to the longitudinal axis. The penetrating member (246) is adapted to facilitate passage of the cannula (200) through tissue. Another embodiment io of the surgical penetrating system (100) includes a cannula (200) having a longitudinal bore and a penetrating member (246) at least partially and slidably mounted within the longitudinal bore of the cannula (200). The penetrating member (246) has at least one leg and is axially movable between non-deployed and deployed positions. Moreover, the penetrating member (246) can be mounted for movement relative to the leading end of the is cannula (200) and within the longitudinal bore of the cannula between a non-deployed position and a deployed position. AH21(1245205_1):MLW4/9 3M 301F3.Z .34.e FIG.2 312 3 2 300FIG. 2B 31 FIG. 2C