High-frequency treatment tool

摘要

A high-frequency treatment tool (1) includes an operating wire (12) having a treatment part (10) including a treatment electrode; a first tube (23) formed from an insulating material, in which the operating wire (12) for enabling the treatment part (10) to protrude and recede is inserted; and a second tube (21) having a passive electrode (22) at a distal end, in which inserted the first tube (23) such as to cover an inner peripheral face of the passive electrode (22) is inserted. An engagement part (25) and an engaged part (22C) that can engage with each other are formed in the first tube (23) and the passive electrode (22), and the engagement of the engagement part (25) with the engaged part (22C) restricts the relative movement of a distal-end part of the first tube (23) to a proximal-end side of the first tube (23) with respect to the passive electrode (22).

主权项

1. A high-frequency treatment tool comprising:
an operating wire having a treatment part including a treatment electrode; a first tube formed from an insulating material, in which the operating wire for enabling the treatment part to protrude and recede is inserted; and a second tube having a passive electrode with a distal-end face at a distal end, in which the first tube is inserted so as to cover an inner peripheral face of the passive electrode; wherein a large-diameter part formed in a distal-end part of the first tube contacts the distal-end face of the passive electrode; the passive electrode includes a through-hole extending in the axial direction of the passive electrode; an outer diameter of the large-diameter part is larger than an inner diameter of the through-hole; and a retraction of the distal-end part of the first tube into the through-hole is restricted by an engagement of the large-diameter part and the distal-end face of the second tube.