| 摘要 |
An electrode catheter which has: a catheter shaft (10); and a tip electrode (20) having a spherical portion (21); and is provided with an irrigation mechanism; wherein a plurality of irrigation openings (112) are arranged at a tip reduced-diameter section (10A) of the shaft (10), a plurality of inclined lumens (111) are formed in the interior of the tip reduced-diameter section (10A), and the formula: D2 ≒ D1 +2 (L2·tanalpha-L1·tanbeta) applies, where (D1) is the outer diameter of the catheter shaft (10), (D2) is the diameter of the spherical portion (21), (L1) is the distance from the rear end of the tip reduced-diameter section (10A) to the tip edge of the irrigation openings (112), (L2) is the distance from the tip edge of the irrigation openings (112) to a maximum diameter section of the tip electrode (20), (beta) is the angle of incline of the tip reduced-diameter section (10A), and (alpha) is the angle of incline of the inclined lumens (111), the angle of incline (alpha) being 5.0-12.5° (excluding 9.1-9.3°). According to this electrode catheter, a liquid can be adequately contacted with a tip hemisphere of the tip electrode having the spherical portion. |
