A method and apparatus for creating a virtual electrode to ablate bodily tissue. The apparatus includes an outer tube, a first electrode, an inner tube and a second electrode. The outer tube is fluidly connected to a source of conductive fluid and defines a proximal end and a distal end. The distal end...http://www.google.de/patents/US7156845?utm_source=gb-gplus-sharePatent US7156845 - Method and apparatus for creating a bi-polar virtual electrode used for the ablation of tissue
