PROBLEM TO BE SOLVED: To provide an electrode catheter excelling in effects of cooling the surface of a distal end electrode and suppressing thrombus formation on the surface of the distal end electrode without causing an abnormal temperature rise (a high temperature part) to a part of the distal end electrode in cauterization, and moreover attaining efficient cauterization treatment.SOLUTION: The electrode catheter includes: a catheter shaft 10 having a lumen 11 serving as a liquid passage an insulated irrigation member 20 connected to the leading end side of the catheter shaft and the distal end electrode 30 connected to the leading end side of the irrigation member. The irrigation member 20 is formed with a storage space 24 for liquid supplied from the catheter shaft 10 a plurality of apertures 25 arranged at equal angle spaces along the outer periphery of the irrigation member 20 to discharge the liquid in the storage space 24 and liquid guide grooves 26 extending toward the leading end from the respective apertures 25. The proximal end surface of the distal end electrode 30 is formed with liquid guide grooves 36 connected to the respective guide grooves 26 of the irrigation member 20.COPYRIGHT: (C)2012,JPO&INPIT【課題】焼灼時に先端電極の一部に異常な温度上昇(高温部)が生じることがなく、先端電極の表面の冷却効果および先端電極の表面における血栓の形成抑制効果に優れ、しかも、効率的な焼灼治療を行うことができる電極カテーテルを提供することにある。【解決手段】液体の流路となるルーメン11を有するカテーテルシャフト10と、その先端側に接続された絶縁性の灌注部材20と、その先端側に接続された先端電極30とを備え、灌注部材20には、カテーテルシャフト10から供給される液体の貯留空間24と、貯留空間24内の液体を排出するために、灌注部材20の外周に沿って等角度間隔に配置された複数の開口25と、開口25の各々から先端方向に延びる液体の案内溝26とが形成され、先端電極30の基端部表面には、灌注部材20の案内溝26の各々に連続する液体の案内溝36が形成されている。【選択図】 図6
