| 主权项 |
1. An obturator assembly comprising:
an obturator housing; a support tube extending distally from the obturator housing; a shield nose affixed to a distal end of the support tube, the shield nose defining a truncated cavity and having a concave center portion on an outer surface thereof; an obturator member movably mounted relative to the support tube; a cutting blade having at least one cutting edge and a truncated tip, the cutting blade being affixed to a distal end of the obturator member and being movable within the truncated cavity of the shield nose, wherein the shield nose has at least one slot formed through the concave center portion and in communication with the truncated cavity for allowing passage of the at least one cutting edge therethrough; and a safety shield biasedly mounted to the obturator housing between an advanced position wherein the safety shield is received about the shield nose and a retracted position wherein the safety shield is moved from about the shield nose. |
