Bladed/bladeless obturator for use in a surgical trocar assembly
AssigneeCovidien LP
InventorGregory Fischvogt
Life of this patent
Estimating the term…
Abstract
An obturator assembly is provided and generally includes an obturator housing and a support tube extending distally from the obturator housing. A shield nose is affixed to a distal end of the support tube. The shield nose defines a truncated cavity and having a concave center portion. An obturator member is movably mounted relative to the support tube. A cutting blade is provided having at least one cutting edge and is affixed to a distal end of the obturator member. The cutting blade is movable within the truncated cavity. 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.
Claims19
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.
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 having a conical center portion and defining a cavity;
- an obturator member movably mounted relative to the support tube;
- a cutting blade having at least one cutting edge and a distal region, the cutting blade being affixed to a distal end of the obturator member and movable within the cavity such that when the cutting blade is in its distal-most position, the distal region of the cutting blade remains within the cavity of the shield nose;
- and
- a safety shield biasedly mounted to the obturator housing such that the safety shield extends over the shield nose to prevent the shield nose from being exposed unless a force is applied to the safety shield.
A trocar assembly comprising;
- a cannula assembly including a cannula housing and a cannula sleeve extending distally from the cannula housing;
- and
- an obturator assembly insertable through the cannula assembly and including:
- 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 cavity and having a blunt distal end and a proximal-facing surface;
- an obturator member movably mounted relative to the support tube;
- a cutting blade having at least one cutting edge and a distal region, the cutting blade affixed to a distal end of the obturator member and movable within the cavity, wherein when the cutting blade is in its distal-most position, the distal region of the cutting blade engages the proximal-facing surface of the shield nose so as to prevent the distal region of the cutting blade from being exposed;
- and
- a safety shield movably mounted to the obturator housing so as to selectively expose the shield nose.
Dependencies are inferred from the claim text.