TREATMENT INSTRUMENT
A treatment instrument includes an insertion portion and a sample collection portion, wherein the sample collection portion includes a link portion and an advancing/retracting portion and when the advancing/retracting portion is located on a most proximal end side, the advancing/retracting portion and the link portion are connected in the axial direction and thereby become parallel to the insertion portion, when the advancing/retracting portion is located on a most distal end side, a part of the advancing/retracting portion and the link portion overlap and thereby become parallel to the insertion portion, and when the advancing/retracting portion is located between a proximal end portion side and a distal end portion side, the link portion is pushed out in a direction crossing the axial direction of the insertion portion by the advancing/retracting portion and thereby projects from the insertion portion.
1 . A treatment instrument comprising:
a rod-like insertion portion to be inserted into a subject;
at least one sample collection portion arranged on a side face of the insertion portion; and
an operation portion that operates the sample collection portion, wherein the sample collection portion includes,
a link portion including an end supported on the insertion portion so that the end serves as a rotation axis and the other end is pivotable relative to the rotation axis;
an advancing/retracting portion including an end joined to the other end of the link portion, the advancing/retracting portion advancing/retracting in an axial direction of the insertion portion, whereby the other end of the link portion pivots relative to the rotation axis, and
a push rod arranged so that the push rod can advance/retract along the axial direction of the insertion portion, the push rod including an end joined to the other end of the advancing/retracting portion, and the other end joined to the operation portion;
wherein when the advancing/retracting portion is located on a most proximal end side, the advancing/retracting portion and the link portion are connected in the axial direction and thereby become parallel to the insertion portion, and when the advancing/retracting portion is located on a most distal end side, a part of the advancing/retracting portion and the link portion overlap and thereby become parallel to the insertion portion; and
wherein when the advancing/retracting portion is located between a proximal end portion side and a distal end portion side, the link portion is pushed out in a direction crossing the axial direction of the insertion portion by the advancing/retracting portion, and thereby projects from the insertion portion.
2 . The treatment instrument according to claim 1 , wherein at a distal end of the advancing/retracting portion, a scraping portion that projects from the distal end of the advancing/retracting portion is arranged in order to scrape a target site.
3 . The treatment instrument according to claim 1 ,
wherein the sample collection portion includes a single-piece plate; and
a part of connection between the link portion and the advancing/retracting portion is more flexible than another part of the sample collection portion.
4 . The treatment instrument according to claim 1 , wherein a recess portion that is a depression for specimen collection is formed at an outer surface of the link portion.
5 . The treatment instrument according to claim 1 , wherein a brushlike brush portion for specimen collection is arranged at an outer side of the link portion.
6 . The treatment instrument according to claim 1 , wherein the other end of the link portion is arranged on the distal end side relative to a distal end face of the insertion portion when the advancing/retracting portion is located on the most distal end side.
7 . The treatment instrument according to claim 1 , comprising an ultrasound transmission/reception section that transmits/receives ultrasound in a direction perpendicular to the axial direction, at a distal end of the insertion portion.
8 . The treatment instrument according to claim 1 , comprising an optical observation section that provides an optical field of view, at the distal end of the insertion portion.