Patent ID: 6330478
Filing Date: 2001-12-11
Classification: A61B,A61M,A61N

Abstract:
A cell necrosis apparatus, comprising:an introducer with a distal end sufficiently sharp to penetrate tissue;an energy delivery device including a first set of RF electrodes and a second set of RF electrodes, each RF electrode of the first and second set having a tissue piercing distal end and positionable in the introducer as the introducer is advanced through tissue, the first and second sets of RF electrodes being deployable with curvature from the introducer, wherein the second set of RF electrodes is deployable a greater distance than the first set of RF electrodes from the introducer; andan advancement member coupled to at least one of the first or the second set of electrodes, the advancement member adapted to advance the first and second set of electrodes into a solid tumor mass, the advancement member including an actuable portion having a diameter or shape configured to control or limit movement of the advancement member, at least a portion of the advancement member being positionable in the introducer.