| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode catheter including an irrigation mechanism that does not cause an abnormal temperature rise at a part of the distal end electrode in cauterization, that exhibits an excellent cooling effect on the surface of the distal end electrode and an excellent effect of preventing the formation of a thrombus on the surface of the distal end electrode, and that can perform efficient cauterization treatment.SOLUTION: An electrode catheter includes: a shaft 10 having a lumen 11 serving as a fluid passage; an irrigation member 20; and a distal end electrode 30. A plurality of irrigation openings 25A for supplying liquid, which is supplied from the shaft 10, to the surface of the distal end electrode 30 are provided in the irrigation member 20 at equal angular intervals. The distal end of the irrigation member 20 has formed therein liquid guide grooves 26 respectively extending from the irrigation openings 25A toward the distal end. The distal end electrode 30 has a spherical distal end section 31 including a maximum-diameter section 39 and also has a proximal end section 32. Liquid guide grooves 36 are formed in the surface of the distal end electrode 30, and the liquid guide grooves 36 respectively continue to the guide grooves 26 in the irrigation member 20 and extend toward the distal end until the liquid guide grooves 36 reach at least the maximum-diameter section 39. |
