Abstract: The medical treatment endoscope according to the present invention includes a sheath having a flexibility; at least one arm member having a bending part that projects out from a front end of the sheath and performs bending actions; an open/close mechanism which directs the arm member from a direction along a central axis of the sheath to a direction deviated from the central axis of the sheath, and from a direction deviated from the central axis of the sheath to a direction along the central axis of the sheath; and a viewing device and an illuminating member that are disposed to the front end side of the sheath.

Abstract: An overtube according to this invention includes: an insertion part, that is inserted into a subject and has a lumen, through which a device insertion part of a device for performing a medical procedure inside a body of the subject is removably inserted, the insertion part being inserted into the subject; and a tissue incising part that is disposed at a distal end side of the insertion part so as to cross the lumen and incises a tissue of the subject.

Abstract: An instrument for an endoscope includes a first insertion portion having an base end to which an operation section is connected; an first offset portion extending outward from an axis of the first insertion portion; a second insertion portion having a base end joined to the first offset portion and an element extending parallel to the axis of the first insertion portion; a second offset portion which is joined to a head of the second insertion portion and reaches an extension of the axis of the first insertion portion; a third insertion portion which is joined to the second offset portion and has a portion arranged on an axis which is substantially the same as at least a part of the axis of the first insertion portion; and an inner hole formed through the first insertion portion, the first offset portion, the second insertion portion, the second offset portion, and the third insertion portion.

Abstract: The endoscope apparatus comprises an endoscope which has an imaging element and a monitor which displays an image imaged by the imaging element. The endoscope is provided with an internal insertion portion which is movably arrangeable inside a body cavity, and an operation unit for changing the position of the internal insertion portion, which is arrangeable outside the body. The internal insertion portion and the operation unit are arranged on a common axis so as to interpose a body wall therebetween.

Abstract: In an apparatus to harvest a living body tissue, in order to prevent pressure in a body cavity exceeding a predetermined value, a living body tissue harvesting apparatus according to the present invention has a grip section and an insertion section to be inserted into the body cavity. Further, in order to discharge a predetermined gas from an opening part provided on the insertion section, the living body tissue harvesting apparatus has a gas supplying tube for supplying the predetermined gas into the insertion section, and a space for releasing the predetermined gas supplied into the body cavity.

Abstract: An endoscope system includes a rigid endoscope including an optical system in a rigid insert section thereof, and a wiper sheath. The wiper sheath includes a wiper insert section receiving the insert section of the rigid endoscope, a wiper arranged on a distal end portion of the wiper insert section and enabled to be placed in contact with a distal-end face of the rigid endoscope received in the wiper insert section, and an operation unit, arranged at a proximal end portion of the wiper insert section, for switching the wiper between a contact state with the wiper placed to be in contact with the distal-end face of the rigid endoscope and a detached state with the wiper spaced apart from the distal-end face of the rigid endoscope, and for moving the wiper on and along the distal-end face of the rigid endoscope when the wiper is in the contact state.