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US 5,984,919 AGranted
Surgical trocar
AssigneeApplied Medical Resources Corporation
InventorsNabil Hilal, Said S. Hilal
Life of this patent
Estimating the term…
Abstract
A surgical trocar includes an operative sleeve adapted for disposition across a tissue barrier and an obturator removably disposed in the sleeve. A source of energy is introduced to a cutting element disposed at the distal end of the obturator for energizing the cutting element to cut tissue barrier. The distal end of the obturator and the distal end of the operative sleeve can be advanced through the cut tissue and the obturator removed leaving the sleeve operatively disposed for further surgery.
Claims29
An obturator for creating an incision through a tissue barrier, including:
- a rod having a longitudinal axis and an outer surface which converges toward a distal tip;
- portions of the rod defining a slot extending transverse to the axis at the distal tip of the rod;
- means disposed in the slot for conducting energy to the distal tip of the rod;
- and
- means for energizing the conducting means to cut the tissue when the distal tip of the rod is moved into proximity with the tissue and when the rod is advanced through the tissue to create the incision.
2 more elements
A surgical trocar assembly for penetrating a barrier of tissue and for providing an operative channel through the tissue barrier and into a body cavity, including:
- an operative sleeve having a distal end and being adapted for disposition across the tissue barrier with the distal end of the sleeve located in the body cavity, the sleeve defining the operative channel with a size sufficient to receive surgical instruments for performing surgery within the body cavity;
- an obturator removably disposed in the sleeve and including an axis and a distal end extending beyond the distal end of the sleeve;
- a source of energy;
- a cutting element disposed at the distal end of the obturator and adapted to be moved axially into contact with the tissue and to be moved axially through the tissue barrier out of contact with the tissue;
- means for conducting the energy from the source to the cutting element and for energizing the cutting element to cut the tissue;
- at least one conductor included in the conducting means and disposed along a conduction path extending from the source of energy to the distal end of the obturator assembly;
- switch means included in the conducting means and disposed in the conductive path for permitting the conduction of energy to the cutting element in a first state and for inhibiting the conduction of energy to the cutting element in a second state;
- means responsive to the cutting element being out of contact with the tissue for placing the switch means in the second state;
- and
- whereby the distal end of the obturator and the distal end of the sleeve can be advanced through the cut tissue to penetrate the tissue barrier, and the obturator can be removed from the sleeve leaving the sleeve operatively disposed across the tissue barrier with the channel appropriately sized to receive the surgical instruments.
7 more elements
A method for inserting a cannula through the wall of a body cavity, comprising the steps of:
- inserting an energy conductive cutting device through the cannula, the device being longitudinal in configuration with a cutting element disposed at a distal tip of the device;
- contacting the wall of the cavity with the energy conductive cutting element of the device;
- energizing the conductive cutting element at the distal tip of the device to cut the wall of the cavity;
- during the energizing step advancing the tip of the device distally to create a hole through the wall of the cavity;
- and
- during the advancing step, maintaining a substantially constant area of contact between the cutting element and the wall of the cavity.
3 more elements
A surgical apparatus for creating an incision through a tissue barrier, including;
- a rod having walls disposed along a longitudinal axis, the walls converging generally toward a line extending transverse to the axis at the distal end of the rod, portions of the walls defining a pair of opposing lips which extend laterally of the rod at the distal end of the rod;
- means disposed at the distal end of the rod and extending at least a portion of the distance along the line for conducting energy at the distal tip to cut the tissue barrier, the lips defining a slot extending transverse to the axis of the rod and being configured to receive the energy conducting means;
- and
- means for energizing the conducting means to cut the tissue when the rod is placed in proximity to the tissue and when the rod is moved axially through the tissue to create the incision.
1 more element
A trocar system for creating an incision through the body tissue, including:
- a cannula forming a channel adapted to receive surgical instruments;
- an obturator sized and configured to extend through the instrument channel of the cannula, the obturator having a longitudinal axis and a cross-sectional dimension which narrows to form a tip at a distal end of the obturator;
- the distal tip of the obturator being defined by at least one ramp which has an angular relationship with the axis of the obturator, and which extends into proximity with a line extending transverse to the axis generally at the distal end of the obturator;
- means disposed along the line for conducting energy at the distal end of the obturator;
- and
- means for energizing the conducting means to cut the tissue when the obturator is placed in close proximity to the tissue and when the obturator is moved through the tissue to create the incision.
3 more elements
A trocar system for creating an incision in tissue including:
- a cannula forming a channel adapted to receive surgical instruments;
- an obturator sized and configured for removable disposition in the instrument channel of the cannula, the obturator having a longitudinal axis extending between a proximal end and an opposing distal end of the obturator;
- a conductor disposed at the distal end of the obturator and having a side surface with a length and a width, the side surface being oriented to face distally outwardly of the obturator with its length disposed generally transverse to the axis of the obturator;
- and
- means for energizing the conductor at the distal end of the obturator to cut the tissue and create the incision when the obturator is placed in proximity to the tissue.
2 more elements
A method for providing a working channel across a body wall defining a cavity, the channel being of a size sufficient to receive instruments adapted to perform surgery within the cavity, comprising the steps of:
- providing a sleeve having walls which define the working channel and extend to a distal end of the sleeve;
- providing an obturator having an energy conductive element disposed at a distal tip of the obturator;
- during the second providing step, providing an obturator shaft having an axis and an outer surface which converge at the distal tip;
- during the second providing step, positioning the energy conductive element to extend transverse to the axis at the distal tip of the obturator shaft;
- inserting the obturator into the working channel of the sleeve with the distal tip of the obturator extending beyond the distal end of the sleeve;
- moving the obturator and the sleeve into proximity with the body wall;
- electrically energizing the conductive element at the distal tip to create an incision in the body wall;
- advancing the obturator and the sleeve through the incision until the distal end of the sleeve is positioned in the cavity;
- removing the obturator from the sleeve to open the working channel into the cavity;
- and
- inserting the instruments into the working channel of the sleeve to perform surgery within the cavity.
8 more elements
Dependencies are inferred from the claim text.