US 12,433,623 B2
Treatment instrument and endoscope apparatus
Yasuo Hirata, Hachioji (JP)
Assigned to Evident Corporation, Nagano (JP)
Filed by Evident Corporation, Nagano (JP)
Filed on Feb. 28, 2022, as Appl. No. 17/682,272.
Claims priority of application No. 2021-047612 (JP), filed on Mar. 22, 2021; and application No. 2021-170411 (JP), filed on Oct. 18, 2021.
Prior Publication US 2022/0296263 A1, Sep. 22, 2022
Int. Cl. A61B 17/29 (2006.01)
CPC A61B 17/29 (2013.01) [A61B 2017/2903 (2013.01); A61B 2017/2911 (2013.01); A61B 2017/2913 (2013.01); A61B 2017/2926 (2013.01); A61B 2017/2946 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A treatment instrument for use with an endoscope, the treatment instrument comprising
an insertion portion; and
a grasping portion disposed on a distal end of the insertion portion, wherein the grasping portion includes:
a movable member including a first proximal end portion inserted in the insertion portion and a first distal end portion, the first distal end portion configured to move forward and backward along a longitudinal axis of the insertion portion, and
a fixation member having a second proximal end portion fixed to the insertion portion, the fixation member including a second distal end portion provided on a distal end side along the longitudinal axis, the second distal end portion being fixed relative to the insertion portion and the first distal end portion of the movable member being movable relative to the second distal end portion,
wherein the second distal end portion of the fixation member is located distally relative to the first distal end portion of the movable member throughout an entire movable range of the first distal end portion,
the first distal end portion is provided on a distal end side of the movable member, the first distal end portion extends in a first direction offset relative to the longitudinal axis,
the second distal end portion is provided on the distal end side of the fixation member, the second distal end portion extends in a second direction, different from the first direction, offset relative to the longitudinal axis, and
the grasping portion is configured to grasp an object by sandwiching the object between a proximal surface of the second distal end portion and a distal surface of the first distal end portion as the first distal end portion moves in a distal end direction relative to the second distal end portion.