Patent ID: 6217587
Filing Date: 2001-04-17
Classification: A61B

Abstract:
A treatment tool usable under observation through an endoscope, said treatment tool comprising:a treatment portion provided at a distal end portion of the treatment tool;an insertion portion for inserting the treatment portion into a body cavity;first and second operation members each having a distal end portion and a proximal end portion and being movable relatively to each other, the operation members being provided at a proximal end portion of the insertion portion and forming an operation portion by which an operator can drive and operate the treatment portion from outside of a human body;a first finger engaging portion formed on the proximal end portion of the first operation member and having a ring-like shape into which the operator can insert his or her thumb;a grip portion formed on the first operation member adjacent to the first finger engaging portion such that the operator can grasp the grip portion using his or her palm;a second finger engaging portion formed on the second operation member such that the operator can engage the second finger engaging portion with at least one finger of the same hand whose thumb engages the first finger engaging portion; anda third finger engaging portion formed on the second operation member such that the operator can engage the third finger engaging portion with his or her thumb of the same hand whose palm grasps the grip portion;wherein selection can be made between a first drive operation of relatively moving the first and second operation members using the first and second finger engaging portions, and a second drive operation of relatively moving the first and second operation members using the grip portion and the third finger engaging portion;wherein the second operation member is axially slidable relative to the first operation member and is provided closer to the distal end portion of the treatment tool than the first operation member; andwherein the second finger engaging portion comprises a pair of flanges.