Moisture transport system for contact electrocoagulation
First Claim
1. A method of ablating walls of a hollow body organ, comprising the steps of:
- providing an ablation device comprising a tubular member and a mesh electrode array carried by the tubular member;
positioning the array within a hollow body organ surrounded by walls;
applying suction through the tubular member and the mesh array to pull interior surfaces of the walls into contact with the array; and
delivering ablation energy through the array to the walls while continuing to apply suction through the tubular member.
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Abstract
An apparatus and method for use in performing ablation or coagulation of organs and other tissue includes a metallized fabric electrode array which is substantially absorbent and/or permeable to moisture and gases such as steam and conformable to the body cavity. The array includes conductive regions separated by insulated regions arranged to produce ablation to a predetermined depth. Following placement of the ablation device into contact with the tissue to be ablated, an RF generator is used to deliver RF energy to the conductive regions and to thereby induce current flow from the electrodes to tissue to be ablated. As the current heats the tissue, moisture (such as steam or liquid) leaves the tissue causing the tissue to dehydrate. Suction may be applied to facilitate moisture removal. The moisture permeability and/or absorbency of the electrode carrying member allows the moisture to leave the ablation site so as to prevent the moisture from providing a path of conductivity for the current.
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Citations
7 Claims
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1. A method of ablating walls of a hollow body organ, comprising the steps of:
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providing an ablation device comprising a tubular member and a mesh electrode array carried by the tubular member; positioning the array within a hollow body organ surrounded by walls; applying suction through the tubular member and the mesh array to pull interior surfaces of the walls into contact with the array; and delivering ablation energy through the array to the walls while continuing to apply suction through the tubular member.
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2. The method of claim 32, wherein the delivering step causes moisture to be released from the tissue, and wherein the method includes applying the suction during the delivering step to carry released moisture away from the walls and through the tubular member.
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3. The method of claim 33, wherein the suction substantially prevents the released moisture from creating a layer of liquid which can provide an electrically conductive pathway between electrodes in the array.
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4. The method of claim 32, wherein the body organ includes an opening, wherein the positioning step includes extending the tubular member through the opening, and wherein the method further comprises the step of substantially sealing the opening around the tubular member.
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5. The method of claim 35, wherein the body organ is a uterus and wherein the opening is a cervical opening.
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6. The method of claim 32, wherein the providing step further provides the array to comprise a bipolar array of electrodes and wherein the delivering step delivers RF energy to the bipolar array.
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7. The method of claim 32, wherein the applying step causes the walls to at least partially collapse into contact with the array.
Specification