Patent ID: 7354437

Claim:
An electrode device for high frequency thermotherapy, comprising a main casing; an electrode needle coupled to a first end of the main casing; an electrode cable coupled to a second end of the main casing to supply a high frequency wave to the electrode needle; a cooling tube coupled to the second end of the main casing to circulate cooling water to or from the electrode needle, and further comprising: a first engaging part provided on the first end of the main casing; and a guide unit coupled to the first engaging part of the main casing to be longitudinally moved relative to the electrode needle while the electrode needle is inserted in the guide unit, the guide unit comprising: a guide tube to receive therein the electrode needle to expose a tip of the electrode needle to an outside of an end of the guide tube, with an insulating layer provided on an outer surface of the guide tube to insulate the guide tube from an outside of the guide tube, wherein the electrode needle comprises a conductive needle part defined at a predetermined part of the tip of the electrode needle and an insulating needle part defined at a remaining part of the electrode needle except for the conductive needle part, and the guide tube of the guide unit to receive the electrode needle therein comprises a conductive guide tube part defined at a predetermined part of the end of the guide tube and an insulating guide tube part defined at a remaining part of the guide tube except for the conductive guide tube part, and a length of the tip of the electrode needle, which is exposed from the end of the guide tube to the outside, is varied according to a position that the guide unit is coupled to the first engaging part of the main casing.