Treatment tools for endoscope
A tubular treatment tool is provided for an endoscope. The tubular treatment tool includes a flexible tubular member. A groove is formed on the flexible tubular member and traverses the flexible tubular member along the diameter. An operation wire is provided in the flexible tubular member. The operation wire is movable relative to the flexible tubular member along an axis of the flexible tubular member. A distal end of the operation wire is secured to the flexible tubular member at a position on a distal end side with respect to the groove. A tissue collecting device is secured at the distal end of the flexible tubular member.
1. A tubular treatment tool for an endoscope, comprising:
a flexible tubular member, a groove traversing said flexible tubular member in a direction of a diameter of said flexible tubular member;
an operation wire positioned within said flexible tubular member, said operation wire being movable relative to said flexible tubular member along an axis of said flexible tubular member; and
a tissue collecting device attached to the distal end of said flexible tubular member, one circumferential portion of a distal end of said operation wire being secured to an inner circumferential surface of the tissue collecting device by brazing and a second circumferential portion of the distal end of said operation wire is not secured to the tissue collecting device,
wherein a proximal end portion of the tissue collecting device is provided with protruded portions having a wedge-shaped cross-section that prevents removal of the tissue collecting device from the flexible tubular member,
wherein the protruded portions are acuate, and
wherein a gap exists between the second circumferential portion of the distal end of said operation wire and the inner circumferential surface of the tissue collecting device.
2. The tubular treatment tool according to claim 1 , wherein said groove has a V-shaped cross section.
3. The tubular treatment tool according to claim 1 ,
wherein the tissue collecting device is a spoon tool.
4. The treatment tool according to claim 1 ,
wherein the spoon tool comprises a cutting edge.
5. The treatment tool according to claim 1 ,
wherein the one circumferential portion of the distal end of said operation wire is secured to the inner circumferential surface of the tissue collecting device at a side on which the groove is formed.