Patent ID: 8425506
Filing Date: 2013-04-23
Classification: A61B

Abstract:
1. An electrosurgical ablator comprising: a shaft having a proximal end and a distal end; and at least one active electrode located at or near said distal end of the shaft including an electrically conductive tip, the at least one active electrode comprising a plurality of protuberances spaced from each other and defining a plurality of recesses therebetween, wherein the plurality of protuberances protrude from a surface of the at least one active electrode, wherein the electrically conductive tip further comprises a centrally located aspiration port separated from adjacent recesses of the plurality of recesses, wherein the plurality of protuberances define a tissue contact surface that is flat and planar, and the centrally located aspiration port is separated from the adjacent recesses by a wall that surrounds the centrally located aspiration port, and wherein the plurality of protuberances and recesses are provided in a star-shaped pattern or a partial star-shaped pattern, at least two of the plurality of recesses are substantially non-parallel, and at least two of the plurality of recesses are substantially parallel, and at least some of the plurality of recesses define a path that at least partially surrounds the centrally located aspiration port.