| 摘要 |
The present invention is equipped with: an insertion part for insertion into a subject; a distal end part 21 provided at the distal end of the insertion part and having at least one mating groove 121m; an ultrasonic vibration unit 30 capable of being attached to or detached from the distal end 21, and having at least one protruding part 130t that protrudes towards the outside in the radial direction K of the distal end part 21, said part 130t being capable of mating with the mating groove 121m; and a gap C for use in removing the ultrasonic vibration unit 30, said gap C formed between the mating groove 121m and the protruding part 130t after having been mated into the mating groove 121m. |
