Electrosurgical hemostatic device with recessed and/or offset electrodes
First Claim
1. An electrosurgical device having an end effector capable of receiving electrosurgical energy therein, said end effector comprising:
- first and second opposing interfacing surfaces, said interfacing surfaces capable of engaging tissue therebetween, at least one of said first and second interfacing surfaces being electrically insulating and including a recessed portion;
electrically isolated first and second poles comprised of electrically different electrodes capable of conducting electrosurgical energy therethrough, said first pole comprised of a first electrode of a first electrical potential and said second pole comprised of a second electrode of a second electrical potential different from said first potential; and
wherein said first electrode is located on one of said interfacing surfaces and said second electrode is located on at least one of said interfacing surfaces, and a tissue contacting portion of at least one of said electrodes is located below said interfacing surface on a said recessed portion, said electrodes being arranged so that electrosurgical energy may be communicated between said poles through the tissue.
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Accused Products
Abstract
An electrosurgical instrument is provided for cauterization and/or welding of tissue of varying impedances, thicknesses and vascularity especially in the performance of endoscopic procedures. The instrument compresses the tissue between an electrode associated with a first pole of a bipolar energy source located on one interfacing surface off a first element, and a second interfacing surface of a second element. The first and second elements are used to engage and compress tissue between the first and second interfacing surfaces. A second electrode associated with a second pole is located one of the two interfacing surfaces. The first electrode is either recessed into the first tissue contacting surface and/or offset from the second electrode on the same or opposing surfaces. A preferred application of the invention is in a cutting instrument wherein a hemostatic line is formed along a cut line using RF energy.
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Citations
32 Claims
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1. An electrosurgical device having an end effector capable of receiving electrosurgical energy therein, said end effector comprising:
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first and second opposing interfacing surfaces, said interfacing surfaces capable of engaging tissue therebetween, at least one of said first and second interfacing surfaces being electrically insulating and including a recessed portion; electrically isolated first and second poles comprised of electrically different electrodes capable of conducting electrosurgical energy therethrough, said first pole comprised of a first electrode of a first electrical potential and said second pole comprised of a second electrode of a second electrical potential different from said first potential; and wherein said first electrode is located on one of said interfacing surfaces and said second electrode is located on at least one of said interfacing surfaces, and a tissue contacting portion of at least one of said electrodes is located below said interfacing surface on a said recessed portion, said electrodes being arranged so that electrosurgical energy may be communicated between said poles through the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An electrosurgical device having an end effector capable of receiving electrosurgical energy therein, said end effector comprising:
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first and second opposing interfacing surfaces, said interfacing surfaces capable of engaging tissue therebetween, at least one of said first and second interfacing surfaces being electrically insulating and including a recessed portion; electrically isolated first and second poles comprised of electrically opposite electrodes capable of conducting bipolar energy therethrough, said first pole comprised of a first electrode of a first electrical potential and said second pole comprised of a second electrode of a second electrical potential; wherein said first electrode is located on one of said interfacing surfaces and said second electrode is located on at least one of said interfacing surfaces, and wherein a tissue contacting portion of at least one of said electrodes is located below said interfacing surface on a said recessed portion. - View Dependent Claims (30, 31, 32)
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Specification