Abstract: An electrode portion is provided with a rod-shaped portion extending in the direction of a flexible sheath. An insulating tip which closes the distal end portion of the sheath is provided with a slide hole and openings for liquid feed. The rod-shaped portion is passed through the sheath for axial movement, and cannot get into the openings.

Abstract: An endoscope accessory, used with an endoscope including a suction conduit communicating with a suction device, an accessory insertion channel, and an operation portion at which entrances of the conduit and channel are formed, includes a tubular insertion unit to be inserted into the channel through the entrance of the channel and to be movable along the channel, and a tubular connection unit provided at a proximal end of the insertion unit and detachably connected to the entrance of the suction conduit. An endoscope system is constituted by combining the accessory with the endoscope. In a method for mounting the accessory onto the endoscope, the insertion unit of the accessory is inserted into the channel through its entrance in the operation portion of the endoscope to be movable along the channel, and the connection unit of the accessory is detachably connected to the entrance of the conduit.

Abstract: This endoscopic treatment system is provided with an insertion-retraction and rotating device for a treatment tool, which performs an insertion-retraction operation along a direction of an axis of a treatment tool and a rotating operation around the axis, of the treatment tool inserted in a channel of an endoscope.

Abstract: This endoscope treatment tool insertion-extraction system is provided with: a first treatment tool and a second treatment tool which are insertable into and retractable from a forceps channel of an endoscope; a first insertion-extraction mechanism which feeds the first treatment tool into the forceps channel or removes the first treatment tool from the forceps channel; a second insertion-extraction mechanism which feeds the second treatment tool into the forceps channel or removes the second treatment tool from the forceps channel; one driving section which drives the first insertion-extraction mechanism and the second insertion-extraction; and a selection section which selectively engage the driving section with one of the first insertion-extraction mechanism and the second insertion-extraction mechanism.

Abstract: In a forceps 1 of the present invention, an operating section 12 is provided with a main body 12 and a pair of slider sections 13 which advance and retract an operating wire 11 by relative closing-and-departing motions thereof; the slider section 13 is provided with a thumb hole section 16 to which a thumb is engaged to operate the operating section 12; the main body 12 is provided with a second finger-receiving section 21 having a sandwiched section 21a to be sandwiched between a first finger and a second finger and thereby being engaged with the first finger and the second finger; and when an operating duct section 6 is inserted within a forceps channel, a distance from the second finger-receiving section 21 to a forceps opening is longer than a distance from a thumb hole section 16 to the forceps opening.

Abstract: A biopsy forceps as one of treatment instruments for endoscope includes: a tubular coil sheath introduced into a body cavity through a treatment instrument channel included in an endoscope insertion portion; a treatment portion disposed closer to a distal end side than a distal end surface of the coil sheath; an operation wire for transmitting a turning force to turn the treatment portion in a circumferential direction, the operation wire being inserted in the coil sheath in a forwardly/backwardly movable manner and turned in the circumferential direction; and a turn restricting mechanism portion for restricting a turn position of the treatment portion turned by the turning force transmitted by the operation wire with respect to the coil sheath at a first turn-restricting position or at a second turn-restricting position.

Abstract: An endoscope of an endoscope system includes a channel of which a distal end forms a distal opening at a distal end of an insertion portion, of which a proximal end forms a proximal opening at an operating portion, and used for at least suction, and a suction duct of which a distal end forms a suction opening at the operating portion and of which a proximal end is connected to a suction device. An endoscopic accessory includes a capture portion to be connected to an accessory insertion portion and detachably attached to the operating portion of the endoscope, and the capture portion includes a communication path to communicate the proximal opening with the suction opening when the capture portion is attached to the endoscope, and a capture unit interposed in the communication path and to capture the tissue being sucked from the channel into the suction duct.

Abstract: An endoscope operating instrument system which includes a back-and-forth movement mechanism for providing a back-and-forth movement drive force required to operate a forceps located at a distal end of the operating instrument and an insertion/withdrawal mechanism designed to insert and withdraw the insert section via an endoscope channel. A winding unit for winding the insert section of the operating instrument is provided and the insertion/withdrawal mechanism is adapted to insert and withdraw the insert section by rotating the winding unit together with the back-and-forth movement mechanism. Thus, a compact system structure is obtained.

Abstract: An endoscopic treatment system 1 of the present invention includes an overtube 2 that is inserted into the body of a patient. An endoscope 7 and a suturing device 8 are inserted into the overtube 2. The overtube 2 has a long and flexible tube main body 3, and a chamber 4 is provided at the distal end of the tube main body 3. The chamber 4 has a lateral hole 10 formed on the lateral surface thereof. The width of the lateral hole 10 is set such that a lesion can be drawn into the lateral hole 10 while preventing other organs on the periphery of the lesion from being drawn into the lateral hole 10.

Abstract: A high-frequency knife includes a cylindrical body member, electrically conductive axial member, operating section, and electrical insulating member. At least an outer peripheral surface of the body member has insulating properties. The axial member is inserted in the body member. A distal end portion of the axial member has a knife section. The operating section is provided on a proximal end portion of the axial member, can be actuated by a surgeon to project and retract the axial member with respect to the body member, and can supply electric power to the axial member. The insulating member is provided on the distal end of the axial member in a position at a distance from the distal end of the body member and has at least the longest axis of a cross section of the knife section.

Abstract: An endoscope treatment instrument provided with a flexible transmitting member, a treatment portion that is attached to the distal end of the transmitting member, and an actuator which is attached to the proximal end of the transmitting member and is for operating the treatment portion, this endoscope treatment instrument being designed to transmit the action of the actuator to the treatment portion via the transmitting member. The transmitting member consists of the connection in the longitudinal direction of a first coil sheath that has excellent rotation follow-up and good relative bending properties, and a second coil sheath that has excellent rotation follow-up and good ease of motion in the relative longitudinal direction.

Abstract: An endoscope system includes: an endoscope having an insertion section extending from an operation section operated by an operator into a human body, and an operation channel having a first end section having an opening at a distal end of the insertion section and a second end section passing through the insertion section and having an opening at the operation section; a tissue-collecting apparatus connected to a connecting pipeway branching from a branch section formed to the second end section in the operation channel, and capable of seizing tissue retracted into the operation channel; an aspirator for producing suction force for suctioning the tissue into the operation channel; and a suction pipeway connecting the tissue-collecting apparatus to the aspirator.

Abstract: In a mucosa excising device using an endoscope according to the present invention, engagement pieces are provided in the vicinity of a claw portion formed at an end edge of a cap, the engagement pieces press the snare wire arranged along the claw portion, both the claw portion and the engagement pieces hold the snare wire, and the snare wire of a high-frequency snare is prevented from accidentally coming off at the time of insertion into a body cavity or during a treatment in the body cavity when conducting endoscopic mucosal resection.

Abstract: An endoscope treatment tool insertion-extraction system is provided with an endoscope having a forceps channel, and a treatment tool unit having a treatment tool that can be inserted and extracted through the forceps channel; and the treatment tool unit is provided with an insertion-extraction mechanism which carries out feeding into or drawing out of the treatment tool through the forceps channel, and a driving section that drives this insertion-extraction mechanism.

Abstract: A code is provided which outputs a predetermined code enable signal by executing a simple control, depending on a clock signal frequency, with an optimal circuit scale. A multiplexer receives integers which are relatively prime, and outputs either of them to an adder, depending on comparator output signal. The adder adds an integer latched by the register and an integer output by the multiplexer, and outputs the result via a multiplexer to the register. The register latches and outputs the received integer to the comparator with a sampling clock signal frequency. In accordance with a threshold set based on the integers and the number of bits of the adder or the register, the comparator outputs a signal having the High state only when the output integer of the register satisfies the threshold condition. The code outputs this as a code enable signal.

Abstract: An endoscope treatment instrument provided with an inserted portion that is flexible, a treatment portion that is attached to the distal end of the inserted portion, an operator portion that is attached to the proximal end of the inserted portion for manipulating the treatment portion, and a transmitting member that is connected to the treatment portion and the operator portion and is inserted into the inserted portion, for transmitting the operation of the operator portion to the treatment portion; wherein: the operator portion has a first handle that is attached to the inserted portion so as to prevent movement in the axial direction of the inserted portion, a second handle that is attached to the first handle so as to permit rotation, a linking member in which its first end is attached to the second handle so as to permit rotation, and its second end is connected to the transmitting member, and a positional relationship maintaining mechanism which can maintain the positional relationship between the lin

Abstract: An endoscopic system includes an endoscope, a cartridge, and a treatment section operation check instrument. The endoscope includes a treatment instrument channel. The cartridge stores a treatment section and a treatment instrument insertion portion introduced into the treatment instrument channel. The treatment section operation check instrument includes a chamber. The chamber contains a hollow section with the volume which allows the treatment section stored in the cartridge to perform a treatment operation. The treatment section operation check instrument is disposed between the endoscope and the cartridge so as to be allowed to perform the operation check by disposing the treatment section in the hollow section of the chamber before insertion of the treatment section into the treatment instrument channel.

Abstract: A apparatus for ligating living tissues comprises an introducing tube capable of being inserted into a living body cavity, at least two or more manipulating wires movably inserted into the introducing tube, and at least two or more clips having a proximal end portion, a pinch section being formed at a distal end of an arm section extending from the proximal end. This clipping apparatus is characterized in that a plurality of clips are arranged in series in the introducing tube so as to engage the clip and the manipulating wire with each other, respectively.

Abstract: A loop section has a bending portion at the distal end. The bending portion bends in a direction that intersects the plane formed by the loop section. A diathermic snare is used in combination with an endoscope. When the loop section expands along the inner circumference of an engagement projection of a cap section, the bending portion of the loop section conforms to the corner of the bending portion of the projection.

Abstract: A treatment instrument operation unit is provided with a drive unit, an operation portion installation section and a command signal output section. The drive unit drives an operation portion for operating each treatment section of the respective treatment instruments. The operation portion is attached to the operation portion installation section provided to the drive unit. The command signal output section outputs an installation start signal to a controller for notifying that the installation of the treatment instrument has begun upon installation of the operation portion in the operation portion installation section. After outputting the installation start signal from the command signal output section to the controller, the drive unit drives the operation portion installation section to the position where the operation portion is allowed to be installed based on the control signal outputted form the controller.