Vessel Sealing Instrument With Electrical Cutting Mechanism
First Claim
1. A method of manufacturing an electrode assembly, the method comprising the steps of:
- providing an electrode assembly for use with an instrument for sealing and cutting vessels and tissue, the electrode assembly comprising;
a pair of opposing first and second jaw members each having an insulator and a corresponding pair of electrically conductive tissue sealing surfaces extending along a length thereof, each pair of the electrically conductive tissue sealing surfaces having an exposed surface;
a cutting element disposed between the pair of electrically conductive tissue sealing surfaces of the first jaw member, the cutting element and at least one electrically conductive tissue sealing surface having a gap defined therebetween;
disposing an insulative material upon an inner sidewall of the electrically conductive tissue sealing surface such that the insulative material extends into the gap and disposing an insulative material on an opposing sidewall of the cutting element such that the insulative material extends into the gap, the insulative material configured to reduce the exposed surface area of the inner sidewall of the electrically conductive tissue sealing surface and opposing sidewall of the cutting element; and
adjusting the position of insulative material on one of the inner sidewall of the electrically conductive tissue sealing surface and the opposing sidewall of the cutting element to optimize power density and location of the cutting zone during electrosurgical cutting.
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Accused Products
Abstract
An end effector assembly for use with an instrument for sealing vessels and cutting vessels includes a pair of opposing first and second jaw members which are movable relative to one another from a first spaced apart position to a second position for grasping tissue therebetween. Each jaw member includes a pair of spaced apart electrically conductive tissue contacting surfaces which each have an insulator disposed therebetween, the conductive surfaces are connected to an electrosurgical energy source. The first jaw member includes an electrically conductive cutting element disposed within the insulator which extends towards the second tissue contacting surface to create a gap therebetween. The cutting element is inactive during the sealing process while the two pairs of electrically conductive surfaces are activated to seal tissue. During the cutting process, the cutting element is energized to a first potential and at least one electrically conductive tissue contacting surface is energized to a different potential to effect a tissue cut through the tissue held between the jaw members along the already formed tissue seal.
160 Citations
11 Claims
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1. A method of manufacturing an electrode assembly, the method comprising the steps of:
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providing an electrode assembly for use with an instrument for sealing and cutting vessels and tissue, the electrode assembly comprising; a pair of opposing first and second jaw members each having an insulator and a corresponding pair of electrically conductive tissue sealing surfaces extending along a length thereof, each pair of the electrically conductive tissue sealing surfaces having an exposed surface; a cutting element disposed between the pair of electrically conductive tissue sealing surfaces of the first jaw member, the cutting element and at least one electrically conductive tissue sealing surface having a gap defined therebetween; disposing an insulative material upon an inner sidewall of the electrically conductive tissue sealing surface such that the insulative material extends into the gap and disposing an insulative material on an opposing sidewall of the cutting element such that the insulative material extends into the gap, the insulative material configured to reduce the exposed surface area of the inner sidewall of the electrically conductive tissue sealing surface and opposing sidewall of the cutting element; and adjusting the position of insulative material on one of the inner sidewall of the electrically conductive tissue sealing surface and the opposing sidewall of the cutting element to optimize power density and location of the cutting zone during electrosurgical cutting. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrode assembly for use with an instrument for sealing and cutting vessels and/or tissue, the electrode assembly comprising:
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a pair of opposing first and second jaw members each having an insulator and a corresponding pair of electrically conductive tissue sealing surfaces extending along a length thereof, each pair of tissue sealing surfaces adapted to connect to a source of electrosurgical energy such that each of the electrically conductive tissue sealing surfaces is capable of conducting electrosurgical energy through tissue held therebetween to effect a seal, each pair of the electrically conductive tissue sealing surfaces having an exposed surface; a cutting element disposed between the pair of electrically conductive tissue sealing surfaces of the first jaw member, the cutting element and at least one electrically conductive tissue sealing surface having a gap defined therebetween; an insulative material disposed on an inner sidewall of the electrically conductive tissue sealing surface and on an opposing sidewall of the cutting element, the insulative material extending into the gap to reduce the exposed surface area of the inner sidewall of the electrically conductive tissue sealing surface and opposing sidewall of the cutting element and configured to optimize power density and location of the cutting zone during electrosurgical cutting. - View Dependent Claims (9, 10, 11)
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Specification