PROBLEM TO BE SOLVED: To provide a catheter for a high-frequency treatment of a type in which an electrode part is cooled by a refrigerant such as salt water, capable of more accurately measuring a tissue temperature in the vicinity of the electrode part.SOLUTION: In a tip 32 of an electrode 30 provided on a distal side of a shaft part 20, a groove 38 is formed on a first surface tapered to the most distal end 39 along a central axis of the electrode part 30. An electric wire 36 connected to a temperature sensor 35 has a shape bent at a distal part, and at least part of the electric wire 36 more distal than a bent part is fitted into the groove 38. The temperature sensor 35 is fitted in a recess 130 provided at the distal end of the groove 38.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】電極部近傍の組織温度をより正確に測定することのできる、電極部が食塩水などの冷媒によって冷却されるタイプの高周波治療用のカテーテルを提供する。【解決手段】シャフト部２０の遠位側に設けられた電極部３０の先端部３２において、最先端３９に至るテーパ状の第１面に電極部３０の中心軸に沿って溝３８を形成する。温度センサ３５に接続された電線３６は遠位部分で屈曲した形状を有し、屈曲部より遠位側の電線３６の少なくとも一部が溝３８に嵌め込まれ、温度センサ３５は、溝３８の遠位端に設けた凹部１３０に嵌め込まれる。【選択図】図２
