Patent ID: 8974377
Filing Date: 2015-03-10
Classification: A61B

Abstract:
1. An endoscope forceps plug that is used by being installed at a metal opening which communicates with a treatment instrument insertion channel provided at an endoscope so as to insert a treatment instrument, the endoscope forceps plug comprising: a main body that has an installation portion which is formed of an elastic material, having a cylinder shape and installed at the metal opening at one end side, and a lid insertion portion which cylindrically protrudes to the other end side and has a hole for inserting a lid; and the lid that is connected to the main body by a flexible connection portion having flexibility, that is formed of an elastic material, that has a tube shape with a cylindrical insertion channel inside into which the treatment instrument is inserted, and that, at both sides where both ends of the cylindrical insertion channel are respectively open, has first installation portion and second installation portion with different external shapes to each other which are installed being selectively inserted to the lid insertion portion, wherein the first installation portion has a larger external shape than the second installation portion, the external shape of the first installation portion and the second installation portion are slightly larger than the hole shape of the lid insertion portion such that the first installation portion and the second installation portion are elastically deformed and installed in the lid insertion portion, at least a portion of a diameter of the cylindrical insertion channel inside the first installation portion decreases in a case of installing the first installation portion to the lid insertion portion, and the diameter of the cylindrical insertion channel inside the first installation portion is unchanged in a case of installing the second installation portion to the lid insertion portion; wherein the first installation portion includes a first insertion portion which is inserted to a back side of the lid insertion portion, at a front part in an insertion direction to the lid insertion portion, and the second installation portion includes a second insertion portion which is inserted to the back side of the lid insertion portion, at the front part of the insertion direction to the lid insertion portion; wherein the first installation portion includes a first fitting portion which is fitted to an upper part of the lid insertion portion, at a rear part in the insertion direction to the lid insertion portion, and the second installation portion includes a second fitting portion which is fitted to the upper part of the lid insertion portion, at the rear part in the insertion direction to the lid insertion portion; wherein a diameter of the cylindrical insertion channel inside the first fitting portion at any position is less than a diameter of the cylindrical insertion channel inside the first insertion portion and a diameter of the cylindrical insertion channel inside the second installation portion.