Endoscopic surgical instrument
First Claim
1. An endoscopic surgical instrument comprising:
- a handle assembly including a barrel portion, a stationary handle and a pivoting handle extending from said barrel portion, said barrel portion having an interior cavity accommodating at least a portion of said pivoting handle;
a housing assembly extending distally from said handle assembly and defining a longitudinal axis, said housing assembly having a pair of coaxial members including an inner rod member reciprocatingly slidable longitudinally within an outer tube member in response to movement of said handle assembly;
a tissue gripping mechanism positioned at a distal end of said housing assembly pivotably secured to said outer tube member and operatively attached to said inner rod member, said tissue gripping mechanism including a pair of jaw members reciprocatingly movable between open and closed positions in response to movement of said inner rod member and said handle assembly;
wherein each of said jaw members of said gripping mechanism includes a camming portion attached to said inner rod member, a gripping portion at a distal end and a curved transition portion sloping with respect to said longitudinal axis between said camming portion and said gripping portion, said gripping portion tapering from said distal end towards said transition portion to form a triangular shaped portion having at least two substantially equal sides and said distal end forms a base of said triangular shaped portion perpendicular to said longitudinal axis, said triangular shaped portion having a corresponding triangular shaped central opening, and a plurality of parallel ribs extending transverse to said longitudinal axis for enhancing gripping of tissue therebetween, and wherein said curved transition portion is offset from said gripping portion such that said camming portion and said gripping portion are in substantially parallel planes when said jaw members are in said closed position; and
a ratchet mechanism at least partially positioned within said interior cavity of said barrel portion of said handle assembly, said ratchet mechanism being operatively associated with at least one of said pair of coaxial members of said housing assembly to provide incremental movement of said tissue gripping mechanism.
0 Assignments
0 Petitions
Accused Products
Abstract
An endoscopic surgical instrument having a handle assembly, a body portion, and a tool mechanism in which a pivoting handle pivots about a stationary handle to open and close the tool mechanism. The instrument includes a rotatable body portion, in which a rotation knob is provided on the instrument at the stationary handle so that the user may rotate the body portion, and consequently the tool mechanism, using a single hand. Furthermore, an electrocautery connection is provided which is positioned out of the line of sight of the surgeon, so that the surgeon may have an unobstructed view to the surgical site. The pivoting handle is provided with a rotatable connection point for connecting the slidable rod member to essentially eliminate radial deflection of the rod within the outer tube during opening and closing of the handles. The tool mechanism may include grasping jaws having rounded, interdigitating teeth for grasping and securely holding tissue or organs for removal through a cannula.
-
Citations
11 Claims
-
1. An endoscopic surgical instrument comprising:
-
a handle assembly including a barrel portion, a stationary handle and a pivoting handle extending from said barrel portion, said barrel portion having an interior cavity accommodating at least a portion of said pivoting handle; a housing assembly extending distally from said handle assembly and defining a longitudinal axis, said housing assembly having a pair of coaxial members including an inner rod member reciprocatingly slidable longitudinally within an outer tube member in response to movement of said handle assembly; a tissue gripping mechanism positioned at a distal end of said housing assembly pivotably secured to said outer tube member and operatively attached to said inner rod member, said tissue gripping mechanism including a pair of jaw members reciprocatingly movable between open and closed positions in response to movement of said inner rod member and said handle assembly; wherein each of said jaw members of said gripping mechanism includes a camming portion attached to said inner rod member, a gripping portion at a distal end and a curved transition portion sloping with respect to said longitudinal axis between said camming portion and said gripping portion, said gripping portion tapering from said distal end towards said transition portion to form a triangular shaped portion having at least two substantially equal sides and said distal end forms a base of said triangular shaped portion perpendicular to said longitudinal axis, said triangular shaped portion having a corresponding triangular shaped central opening, and a plurality of parallel ribs extending transverse to said longitudinal axis for enhancing gripping of tissue therebetween, and wherein said curved transition portion is offset from said gripping portion such that said camming portion and said gripping portion are in substantially parallel planes when said jaw members are in said closed position; and a ratchet mechanism at least partially positioned within said interior cavity of said barrel portion of said handle assembly, said ratchet mechanism being operatively associated with at least one of said pair of coaxial members of said housing assembly to provide incremental movement of said tissue gripping mechanism. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An endoscopic surgical instrument having a handle mechanism including a barrel portion, a stationary handle and a pivoting handle extending from said barrel portion, said barrel portion having an interior cavity accommodating at least a portion of said pivoting handle, a housing assembly extending at a first end from said handle mechanism, said housing assembly defining a longitudinal axis and having a pair of coaxial members including an inner rod reciprocatingly slidable longitudinally in an outer tube in response to movement of said handle mechanism, and a jaw mechanism extending from said housing assembly at a second end and being movable between open and closed positions in response to movement of said inner rod, said jaw mechanism being pivotably secured to said outer tube and operatively attached to said inner rod, said jaw mechanism comprising a pair of tissue gripping members in opposed relation, said gripping members each including a proximal end which is operatively secured to said inner rod and positioned at said second end of said housing assembly, said gripping members each terminating in a distal end having a triangular shaped gripping portion, each gripping member further having a plurality of parallel ribs extending in a direction transverse to said longitudinal axis, and a triangular shaped opening generally central of said triangular shaped gripping portion, each gripping member further having a curved transition portion between said proximal end and said gripping portion, said transition portion sloping with respect to a plane defined by said longitudinal axis, such that said gripping portions contact each other at at least one location in said closed position while said transition portions remain spaced from each other, said gripping members further including means for enhancing gripping of tissue therebetween;
- and
a ratchet mechanism at least partially positioned within said interior cavity of said barrel portion of said handle mechanism, said ratchet mechanism being operatively associated with at least one of said pair of coaxial members of said housing assembly to provide incremental movement of said pair of tissue gripping members. - View Dependent Claims (8, 9, 10, 11)
- and
Specification