Patent ID: 6921399
Filing Date: 2005-07-26
Classification: A61B

Abstract:
1. A monopolar electrosurgical probe for a ablation of tissue immersed in a conductive fluid comprising: a shaft having a proximal end and a distal end; and at least one active electrode operating at a frequency of about 100 KHz to about 3 MHz for tissue ablation, said active electrode being located at or near said distal end and comprising a metallic body region surrounded by a dielectric material and a metallic tip adjacent said metallic body region, said metallic tip further comprising a plurality of protuberances spaced from each other by a predetermined distance, wherein said plurality of protuberances protrude above a most distal transversal surface of said dielectric material, and wherein lateral walls of at least one of said protuberances from a incidence angle with adjacent lateral of said dielectric material so that a groove is defined by said lateral walls of said at least one of said protuberances and said adjacent lateral walls of said dielectric material surrounding said metallic body region.