Electrosurgical instrument and method of use
First Claim
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1. A method for welding tissue comprising:
- providing a tissue welding device having first and second tissue engaging surfaces at least one surface including an electrode surface that defines a plurality of surface portions having different resistances to electrical current flow therethrough;
engaging a target tissue volume with the tissue engaging surfaces; and
delivering Rf energy to the target volume to create a substantially even temperature distribution across at least a portion of the target tissue volume to substantially uniformly weld at least a portion of the target tissue volume.
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Abstract
An embodiment of a method of the invention provides a method for welding tissue comprising providing a tissue welding device having first and second tissue engaging surfaces with at least one surface including an electrode surface that defines a plurality of surface portions having different resistances to electrical current flow therethrough. A target tissue volume is engaged with the tissue engaging surfaces. Rf energy is delivered to the target volume to create a substantially even temperature distribution across at least a portion of the target tissue volume to substantially uniformly weld at least a portion of the target tissue volume.
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Citations
25 Claims
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1. A method for welding tissue comprising:
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providing a tissue welding device having first and second tissue engaging surfaces at least one surface including an electrode surface that defines a plurality of surface portions having different resistances to electrical current flow therethrough;
engaging a target tissue volume with the tissue engaging surfaces; and
delivering Rf energy to the target volume to create a substantially even temperature distribution across at least a portion of the target tissue volume to substantially uniformly weld at least a portion of the target tissue volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for welding tissue comprising:
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providing a tissue welding device having first and second tissue engaging surfaces each surface including an electrode surface having an electrical resistance gradient therethrough;
engaging a target tissue volume with the tissue engaging surfaces; and
delivering Rf energy to the target volume to create a substantially even temperature distribution across at least a portion of the target tissue volume to substantially uniformly weld at least a portion of the target tissue volume. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for welding tissue comprising:
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providing a tissue welding device having at least one tissue-engaging surface including an electrode having non-uniform resistance properties;
engaging a target tissue volume with the at least one tissue-engaging surface; and
delivering Rf energy to the target volume, wherein Rf current flows within the engaged tissue in a controlled dynamic spatial pattern corresponding to changed tissue electrical resistance or temperature.
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23. A method for welding tissue comprising:
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providing a tissue welding device having at least one tissue-engaging surface including a section having non-uniform electrical resistance over a substantially continuous portion of the section;
engaging a target tissue volume with the tissue engaging surfaces; and
delivering Rf energy to the target volume wherein the non uniform resistance section directs the flow of Rf current in response to electrical resistance changes in the target tissue volume to create a substantially even temperature distribution across at least a portion of the target tissue volume. - View Dependent Claims (24, 25)
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Specification