Patent ID: 9610120
Date: 2017-04-04
CPC Classifications: A61B

Claim:
1. A high-frequency treatment tool for an endoscope comprising: a sheath formed of a material having an insulation property; a shaft-shaped member formed of a material having conductivity and inserted to advance and retract in the sheath; and an electrode having a conduit line formed to jet forward a fluid supplied into the sheath, and connected to a distal end section of the shaft-shaped member, wherein the electrode has an outer circumferential surface that is adapted to be electrically connected to a tissue to perform treatment, and an inner circumferential surface of the conduit line that faces the fluid when the fluid is supplied, an arithmetic average roughness of the outer circumferential surface is larger than an arithmetic average roughness of the inner circumferential surface, and the arithmetic average roughness of the inner circumferential surface is 0.1 μm or less, the electrode is a tubular electrode having the conduit line formed along a longitudinal axis of the sheath, and an arithmetic average roughness of a distal end surface of the electrode is larger than the arithmetic average roughness of the inner circumferential surface of the conduit line, and smaller than the arithmetic average roughness of the outer circumferential surface.