treatment system 1 includes a treatment instrument 2 having a pair of holding portions 10 for applying thermal energy to the heat generating portion 20 is generated in the living tissue LT held between freely opened and closed, the drive signal of the alternating current to the heating section 20 a signal output section 31 supplies a setting unit 32 for setting a target temperature of the heating unit 20, a signal detecting section 33 for detecting the current and voltage of the driving signal, the heat generating unit 20 by adjusting the power of a drive signal a control unit 34 for temperature control, a signal extractor 35 to the signal detector 33 extracts the DC component from the driving signal for detection, warning of the failure of the heat generating portion 20 extracts signal to the signal extraction unit 35 has extracted based on a failure detecting unit 36 that detects a phenomenon, comprises a.処置システム1は、開閉自在で間に保持した生体組織LTに発熱部20が発生した熱エネルギーを印加する一対の保持部10を有する処置具2と、発熱部20に交流の駆動信号を供給する信号出力部31と、発熱部20の目標温度を設定する設定部32と、駆動信号の電流及び電圧を検出する信号検出部33と、駆動信号の電力を調整することにより発熱部20を温度制御する制御部34と、信号検出部33が検出する駆動信号から直流成分を抽出する信号抽出部35と、信号抽出部35が抽出した抽出信号をもとに発熱部20の故障の前兆現象を検知する故障検知部36と、を具備する。
