Olympus Corporation

Olympus Medical Systems Corporation

Fuminori Wake

Kazuhiko Hino

Tetsuya Yamamoto

Yuji Sakamoto

Shunsuke Motosugi

A hood for endoscope is attached to an endoscope including an insertion portion, a distal end portion and an air-feeding conduit, and the hood for endoscope includes a frame configured to be fitted to an outer circumference of the distal end portion, and a rectification plate configured to, so that gas spurted out forward in a longitudinal axis direction from an air-feeding port flows, changing an orientation in which the gas flows, from the longitudinal axis direction to a circumferential direction of the frame intersecting the longitudinal axis direction by the gas hitting the rectification member, guide the gas in a direction not toward a position of the distal end portion provided with an observation member.

Hood for endoscope and endoscope system

An insertion apparatus includes an endoscope, a first air feeding apparatus, a first air suction apparatus, a second air feeding apparatus, a second air suction apparatus, a pressure detector, an operation detector and a controller, and the controller performs first control on the second air feeding apparatus and the second air suction apparatus so that the amount of gas per predetermined time period fed from the second air feeding apparatus becomes equal to the amount of gas suctioned by the second air suction apparatus, and when the operation detector detects the operation and the pressure detector detects that the pressure in a subject changes from a first pressure to a second pressure, the controller maintains the first control to perform air feeding/air suction into/from the subject at the second pressure.

Insertion apparatus and operation method for insertion apparatus

The endoscope apparatus includes an endoscope insertion portion configured to be inserted into a subject and including a distal end portion, a distal end covering portion configured to cover at least an outer periphery of the distal end portion of the endoscope insertion portion and held by the distal end portion, a suction conduit provided with an opening in the distal end covering portion and configured to discharge a fluid including gas generated from an inside of the subject to outside of the subject via the opening, and a positioning portion configured to define a position of the opening of the suction conduit in a rotation direction with a long axis of the endoscope insertion portion as a center when the distal end covering portion is held by the distal end portion of the endoscope insertion portion.

Endoscope apparatus and endoscope system providing angular orientation between overtube and endoscope insertion section inserted in overtube

An endoscope apparatus includes: an endoscope including an insertion portion, a suction conduit, a by-pass conduit, a suction button, and a solenoid valve; a high-frequency knife; and a valve opening/closing portion.

Endoscope apparatus and endoscope having valve which is opened and closed based on operation of cauterizing device

An insertion portion mounted tool of an insertion instrument includes: an expansion and retraction section provided on an outer circumferential side of an insertion portion so as to be movable forward and backward in a longitudinal direction, and configured to be expanded in the subject by an operation from outside of the subject to thereby be held by an inner wall of the subject; a positioning portion that defines a range in which the expansion and retraction section is movable forward and backward in the longitudinal direction with respect to the insertion portion; and a rotational movement restriction portion that restricts an angle in which the expansion and retraction section is rotationally moved in an outer circumferential direction on an outer circumference of the insertion portion.

Insertion portion mounted tool of insertion instrument and insertion system

A high-frequency treatment tool for an endoscope includes: a sheath formed of a material having an insulation property; a shaft-shaped member formed of a material having conductivity and inserted to advance and retract in the sheath; and an electrode having a conduit line formed to jet forward a fluid supplied into the sheath, and connected to a distal end section of the shaft-shaped member. The electrode has an outer circumferential surface electrically connected to a contacted tissue to perform treatment, and an inner circumferential surface of the conduit line that faces the fluid when the fluid is supplied. An arithmetic average roughness of the outer circumferential surface is larger than an arithmetic average roughness of the inner circumferential surface, and the arithmetic average roughness of the inner circumferential surface is 0.1 &#x3bc;m or less.

High-frequency treatment tool for endoscope

Provided is a high-frequency treatment tool including a cylindrical sheath, an electrode member that is made to protrude and be retracted with respect to a distal-end portion of the sheath, and a liquid-feeding unit for feeding a liquid toward the distal-end side inside a flow channel in the sheath, wherein a distal end of the electrode member is provided with a distal-end expanded portion that extends radially outward in a radiating manner and that has a base-end surface that is made to protrude and be retracted with respect to a distal-end portion of the sheath, wherein the sheath is provided with a restricting portion that restricts the movement of the electrode member toward the base-end side at a position at which a portion of the distal-end expanded portion is accommodated inside the sheath and an accommodating portion that can accommodate at least a portion of the distal-end expanded portion.

High-frequency treatment tool

In a high-frequency knife, a through hole that extends in the direction of an axis is formed on a radial outer side of a second electrode in a larger-diameter portion, and a distance increasing portion increases a creeping distance along an external surface of the larger-diameter portion between an outer peripheral surface of the second electrode exposed to the outside and an opening of the through hole on a proximal end side.

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Hachioji, Japan

Fuminori Wake