Trocar assembly
First Claim
Patent Images
1. An obturator assembly for penetrating body tissue, which comprises:
- a handle assembly including a finger-actuated trigger member;
a sleeve member connected to and extending from the handle assembly;
an obturator shaft at least partially positioned within the sleeve member and engageable with the finger-actuated trigger member of the handle assembly, the obturator shaft defining a longitudinal axis and having proximal and distal end portions; and
a cutting mechanism disposed at the distal end portion of the obturator shaft, the cutting mechanism deployable for cutting action upon movement of the trigger member,wherein the obturator shaft is adapted to move distally upon movement of the trigger member to deploy the cutting mechanism from the sleeve member, andwherein the cutting mechanism includes first and second blade members, the blade members at least moveable relative to the longitudinal axis of the obturator shaft between a first non-deployed position wherein the cutting blades are disposed within the obturator sleeve and a second deployed position wherein cutting edges of the cutting blades are displaced from the longitudinal axis and exposed beyond the obturator sleeve.
4 Assignments
0 Petitions
Accused Products
Abstract
An obturator assembly for penetrating body tissue, includes a handle assembly having a finger-actuated trigger member, a sleeve member connected to and extending from the handle assembly, an obturator shaft at least partially positioned within the sleeve member and engageable with the finger-actuated trigger member of the handle assembly and a cutting mechanism supported by the distal end portion of the obturator shaft. The cutting mechanism is deployable for cutting action upon movement of the trigger member. A method of using the obturator assembly is also disclosed.
205 Citations
35 Claims
-
1. An obturator assembly for penetrating body tissue, which comprises:
-
a handle assembly including a finger-actuated trigger member; a sleeve member connected to and extending from the handle assembly; an obturator shaft at least partially positioned within the sleeve member and engageable with the finger-actuated trigger member of the handle assembly, the obturator shaft defining a longitudinal axis and having proximal and distal end portions; and a cutting mechanism disposed at the distal end portion of the obturator shaft, the cutting mechanism deployable for cutting action upon movement of the trigger member, wherein the obturator shaft is adapted to move distally upon movement of the trigger member to deploy the cutting mechanism from the sleeve member, and wherein the cutting mechanism includes first and second blade members, the blade members at least moveable relative to the longitudinal axis of the obturator shaft between a first non-deployed position wherein the cutting blades are disposed within the obturator sleeve and a second deployed position wherein cutting edges of the cutting blades are displaced from the longitudinal axis and exposed beyond the obturator sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A surgical trocar, which comprises:
-
a cannula; an obturator configured for insertion into the cannula, the obturator including proximal and distal end portions; at least two overlapping blade members for cutting tissue, the blade members sharing a common pivot point and supported at the distal end portion of the obturator for movement away from the obturator; an actuating mechanism associated with the obturator and operatively connected to the blade members, the actuating mechanism including a trigger member movable to cause movement of the blade members to a deployed position at least partially exposed beyond the cannula. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A surgical trocar, which comprises:
-
a cannula; and an obturator configured for at least partial insertion into the cannula and defining a longitudinal axis, the obturator including; an obturator shaft having proximal and distal end portions, the obturator shaft reciprocally axially movable within the cannula; at least two blade members supported at a distal end portion of the obturator and moveable between at least a non-deployed position and a fully deployed position in response to movement of the obturator shaft; a handle operatively connected to the obturator shaft, the handle having a trigger selectively movable to cause reciprocal axial movement of the obturator shaft and movement of the blade members between the non-deployed and fully deployed position; and a manually operable member mounted to the handle and operatively engageable with the trigger, the manually operable member selectively movable between two positions, wherein in a first position of the manually operable member the trigger is capable of moving to a first position thereof corresponding to the fully deployed position of the blade members and wherein in a second position of the manually operable member the trigger is capable of moving to a second position thereof corresponding to a partial deployed position of the blade members, wherein the manually operable member is normally biased to the second position thereof. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
-
28. A handle system to be connected to a trocar of the type including a cannula having a cannula housing and a cannula sleeve, an obturator configured for at least partial insertion into the cannula and having an obturator shaft and a cutting mechanism associated with a distal end of the obturator shaft, the handle system including:
-
a frame; a trigger mechanism associated with the frame for axially moving the obturator shaft to deploy the cutting mechanism beyond the cannula, the trigger mechanism including a trigger pivotally mounted to the frame, the trigger operatively engageable with the obturator shaft and pivotally movable between a first non-pivoted position corresponding to an unarmed position of the cutting mechanism and a second fully pivoted position corresponding to a fully armed position of the cutting mechanism; a release mechanism for detachably mounting the frame to the cannula housing; and a manually operable member mounted to the frame and engageable with the trigger, the manually operable member selectively moveable between first and second positions thereof and provided with mechanical means for retaining the manually operable member in the first and second positions, wherein in a first position of the manually operable member the trigger is capable of moving to a fully pivoted position corresponding to a fully advanced position of the obturator shaft and fully armed position of the cutting mechanism, wherein in the second position of the manually operable member the trigger is capable of pivoting to an intermediate position thereof corresponding to an intermediate advance position of the obturator shaft and an intermediate armed position of the cutting mechanism, wherein the manually operable member is normally biased to the second position. - View Dependent Claims (29)
-
-
30. A method for forming an incision in body tissue of a patient, comprising the steps of:
-
positioning an obturator against the body tissue of a patient, the obturator including at least two overlapping blade members at a distal end thereof and sharing a common pivot point; actuating the obturator such that the blade members are deployed to incise the body tissue, and forming a generally linear incision in the abdominal wall with the deployed blade members. - View Dependent Claims (31, 32, 33, 34)
-
-
35. An obturator assembly for penetrating body tissue, which comprises:
-
a handle assembly including a finger-actuated trigger member; an obturator sleeve having a proximal end connected to the handle assembly and a rounded distal end having a slot; an obturator shaft positioned within the sleeve member and engageable with the finger-actuated trigger member of the handle assembly, the obturator shaft defining a longitudinal axis and having proximal and distal portions; and at least two blade members disposed at the distal portion of the obturator shaft and within the rounded distal end of the obturator sleeve in a non-deployed position, wherein initial movement of the trigger member moves the blade members in a distal direction through the slot in the obturator sleeve and wherein further movement of the trigger member causes each of the blade members to move in a different direction in a common plane with respect to each other.
-
Specification