| 摘要 |
<p>This treatment instrument is inserted into a channel of an ultrasonic endoscope so as to be retractable, and has a treatment member that has a distal end and a base end, is cylindrical, and has a plurality of concave dimples formed in the outer surface thereof. In each of the plurality of dimples, the distance between the posterior end of the dimple closest to the base end in the central axis direction of the treatment member and the deepest part in the radial direction inside the dimple is shorter than the distance between the anterior end of the dimple closest to the distal end in the central axis direction and the deepest part.</p> |
