Patent ID: 9028489
Filing Date: 2015-05-12
Classification: A61B

Abstract:
1. An apparatus for radiofrequency tissue ablation, comprising: a conductive hollow electrode formed in an elongated hollow tube shape wherein a closed end is formed on one side of the hollow electrode to be inserted into a living body, wherein the conductive hollow electrode is divided into a non-insulation region extending from the closed end in a longitudinal direction of the conductive hollow electrode and an insulation region covered with a separate insulation member on an outer circumference of the conductive hollow electrode, wherein at least one groove extends on the outer circumference of the conductive hollow electrode in the insulation region thereof in the longitudinal direction of the conductive hollow electrode so that the at least one groove is covered with the separate insulation member, and wherein at least one temperature sensor is slidably installed in the at least one groove as well as between the conductive hollow electrode and the separate insulation member, for sensing temperature of a living tissue when in contact with the hollow electrode; and a control unit connected to the hollow electrode and the at least one temperature sensor, for determining when coagulation and necrosis of the living tissue has occurred based on the temperature sensed by the at least one temperature sensor, and controlling output supplied to the hollow electrode.