| abstract |
A medical probe device of this invention comprising a catheter (2) having a control end and a probe end. The probe end includes a stylet guide housing (6) having at least one stylet port and stylet guide means for directing a flexible stylet (8) outward through at least one stylet port and through intervening tissue to targeted tissues. A stylet (8) is positioned in at least one of said stylet guide means, the stylet comprising a nonconductive sleeve (30) having an RF electrode lumen (50) and an optional fluid supply lumen (60) and a temperature sensor lumen (58) therein. At least one portion of an opposed surface of the electrode lumen and the electrode (32) can be spaced apart to define a liquid supply passageway for delivery of medication liquid. The RF electrode enclosed within the nonconductive sleeve has a distal length optionally having at least one current focusing groove (70) means thereon and a distal tip shaped to focus current crowding on its terminal end. |