| 摘要 |
<p>An endoscope treatment tool includes: a pliable flexible sheath; a manipulation wire inserted through the flexible sheath so as to freely advance and retract; a basket portion which is provided at a distal end of the manipulation wire, and is constituted by a plurality of elastic wires; and a locking portion which is provided at distal ends of the elastic wire, and integrates the plurality of elastic wires. A maximum diameter portion of the basket portion in the radial direction is at a position closer to the locking portion than an intermediate position between a proximal end of the basket portion and the locking portion in a direction of the central axis. The plurality of elastic wires is formed in a shape of a helix in which each of the plurality of elastic wires is wound in a same direction over an entire length of the plurality of elastic wires, and a winding pitch of the plurality of elastic wires becomes gradually smaller from the distal end of the manipulation wire toward the locking portion.</p> |
