Abstract: A system for evulsing subcutaneous tissue includes an endoscope adapted to be inserted into subcutaneous tissue through a skin cut portion to observe tissue to be evulsed and existing under the skin, a dissecting unit adapted to be inserted into the subcutaneous tissue through the skin cut portion so as to dissect the tissue, to be evulsed, from surrounding tissue in order to form a adapted cavity along the tissue to be evulsed and below the skin, a cavity maintaining unit adapted to be inserted from the skin cut portion into the cavity formed by the dissecting unit and to be retained in the cavity in order to maintain, around the tissue to be evulsed, a treatment space which permits the endoscope to be inserted and removed and which enables treatment of the tissue to be evulsed, and at least one treatment tool adapted to be inserted into the treatment space maintained by the cavity maintaining unit in order to perform, in the treatment space, treatment required to evulse the tissue to be evulsed.

Abstract: An endoscope system including an endoscope having an insertion section which extends from a proximal end to a distal end and is inserted into a cavity under inspection and an operation section connected to the proximal end of the insertion section, and a protection cover including an insertion section inserting channel which extends from a proximal end to a distal end and into which said insertion section of the endoscope is insertable and a conduit channel which extends from the proximal end to the distal end, the improvement being characterized in that a distal end portion of the insertion section has a non-circular cross section such as a semicircular or oval cross section and a proximal end portion of the insertion section has a substantially circular cross section. A distal end member of the insertion section inserting channel has an accommodating portion which is a corresponding non-circular cross section.

Abstract: A system for evulsing subcutaneous tissue includes an endoscope adapted to be inserted into subcutaneous tissue through a skin cut portion to observe tissue to be evulsed and existing under the skin, a dissecting unit adapted to be inserted into the subcutaneous tissue through the skin cut portion so as to dissect the tissue, to be evulsed, from surrounding tissue in order to form a cavity along the tissue to be evulsed and below the skin, a cavity maintaining unit adapted to be inserted from the skin cut portion into the cavity formed by the dissecting unit and to be retained in the cavity in order to maintain, around the tissue to be evulsed, a treatment space which permits the endoscope to be inserted and removed and which enables treatment of the tissue to be evulsed, and at least one treatment tool adapted to be inserted into the treatment space maintained by the cavity maintaining unit in order to perform, in the treatment space, treatment required to evulse the tissue to be evulsed.

Abstract: An endoscope system including an endoscope having an insertion section which extends from a proximal end to a distal end and is inserted into a cavity under inspection and an operation section connected to the proximal end of the insertion section, and a protection cover including an insertion section inserting channel which extends from a proximal end to a distal end and into which said insertion section of the endoscope is insertable and a conduit channel which extends from the proximal end to the distal end, the improvement being characterized in that a distal end portion of the insertion section has a non-circular cross section such as a semicircular or oval cross section and a proximal end portion of the insertion section has a substantially circular cross section. A distal end member of the insertion section inserting channel has an accommodating portion which is a corresponding non-circular cross section.

Abstract: An endoscope system including an endoscope having an insertion section which extends from a proximal end to a distal end and is inserted into a cavity under inspection and an operation section connected to the proximal end of the insertion section, and a protection cover including an insertion section inserting channel which extends from a proximal end to a distal end and into which said insertion section of the endoscope is insertable and a conduit channel which extends from the proximal end to the distal end, the improvement being characterized in that a distal end portion of the insertion section has a non-circular cross section such as a semicircular or oval cross section and a proximal end portion of the insertion section has a substantially circular cross section. A distal end member of the insertion section inserting channel has an accommodating portion which is a corresponding non-circular cross section.

Abstract: A cover-system endoscope comprises the main body of an endoscope and an endoscope cover assembly for covering the main body of the endoscope. The endoscope cover assembly includes a direction changing means such as a tube body, an erecting base having a hinge section or a balloon for erecting the erecting base in order to change the direction of a medical treatment instrument which is inserted through the medical treatment instrument channel.

Abstract: An endoscope device has an endoscope provided with a front end portion where a nozzle and a sucking opening are formed. A first passage and a fluid supply pump are connected to the nozzle to supply fluid to it. A second passage and a suction pump are connected to the sucking opening. Connected to the first and second passages are a third passage and a pump for circulating the fluid in such a way that it is sucked through the sucking opening and jetted through the nozzle.