System and method of performing an electrosurgical procedure
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Abstract
A system and method of making a lesion on living tissue including providing an electrosurgical system, determining a desired lesion depth, selecting a power setting, and applying electrical energy to the living tissue. The system includes an instrument having an electrode at a distal portion thereof, and a power source having multiple available power settings. The power source is electrically connected to the electrode. The step of applying electrical energy includes energizing the electrode at the selected power setting for a recommended energization time period that is determined by reference to predetermined length of time information and based upon the desired lesion depth and the selected power setting. The system preferably further includes a fluid source for irrigating the electrode at an irrigation rate. In this regard, the predetermined length of time information is generated as a function of irrigation rate.
210 Citations
79 Claims
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1-31. -31. (canceled)
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32. A method of creating an ablation lesion at a tissue target site, the method comprising:
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providing an ablation system including;
an ablation instrument having a tissue ablating member, and an ablative energy source having multiple available ablative energy settings, wherein the ablative energy source supplies ablative energy to the tissue ablating member;
determining a desired depth for the ablation lesion;
selecting a desired ablative energy setting for the ablative energy source, including considering a probability that the tissue target site will be heated so rapidly that intracellular fluid within the tissue target site will begin to boil and at least a portion of the tissue target site will erupt causing undesirable damage during a subsequent ablation procedure; and
supplying ablative energy to the tissue ablating member in contact with the tissue target site, the ablative energy supplied to the tissue ablating member at the desired ablative energy setting for a recommended energization time period determined by reference to predetermined length of time information and based upon the desired lesion depth and the selected ablative energy setting;
wherein the step of selecting a desired ablative energy setting is completed prior to determining the recommended energization time period, and the recommended energization time period is determined prior to the step of supplying ablative energy to the tissue ablating member. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. An ablation system for creating an ablation lesion at a tissue target site, the system comprising:
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an ablation instrument having a tissue ablating member;
an ablative energy source having multiple available ablative energy settings and being connected to the ablation instrument for selectively supplying ablative energy to the tissue ablating member; and
an energization look-up table corresponding with the ablation instrument, the energization look-up table including;
an ablative energy setting data set that includes at least one of the multiple available ablative energy settings of the ablative energy source, a lesion depth data set, energization time period information organized as a dependent variable of the ablative energy setting and lesion depth data sets;
wherein the energization look-up table is adapted to identify a recommended energization time period based upon a desired lesion depth by a cross-reference between energization time and ablative energy setting for minimizing a possibility that the tissue target site will be heated so rapidly that intracellular fluid within the tissue target site will begin to boil and at least a portion of the tissue target site will erupt causing undesirable damage during the creation of the ablation lesion. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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Specification