A moisture transport system for contact electrocoagulation

Details A moisture transport system for contact electrocoagulation A moisture transport system for contact electrocoagulation

A - Human Necessities

61

B

A61B 18/14 (2006.01) A61B 17/22 (2006.01) A61B 17/42 (2006.01) A61M 1/00 (2006.01) A61M 16/04 (2006.01)

Patent

CA 2251216

An apparatus and method for use in performing ablation of organs and other tissue includes an electrode carrying member which is substantially absorbent and/or permeable to moisture. The electrode carrying member is mounted to the distal end of an elongate shaft, and an array of electrodes is mounted to the surface of the electrode carrying member. 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 electrodes and to thereby induce current flow from the electrodes to tissue to be ablated. As the current heats the tissue, moisture (such as water vapor or liquid) leaves the tissue causing the tissue to dehydrate. 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.

Dispositif et procédé destinés à être utilisés pour l'ablation d'organes et d'autres tissus. Le dispositif comporte un élément support d'électrode sensiblement absorbant et/ou perméable à l'humidité. L'élément support d'électrode est fixé sur l'extrémité distale d'un arbre allongé, et une rangée d'électrodes est fixée à la surface de l'élément. Une fois que le dispositif d'ablation a été mis en contact avec le tissu à exciser, un générateur RF est utilisé pour délivrer une énergie RF aux électrodes et ainsi induire un flux de courant entre ces dernières et le tissu à exciser. Au moment où le courant touche le tissu, l'humidité (vapeur d'eau ou eau) quitte le tissu ce qui le déshydrate. La perméabilité et/ou la capacité d'absorption de l'élément support d'électrode permet à l'humidité de quitter le site d'ablation, ce qui l'empêche de constituer un chemin conducteur pour le courant.

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