Abstract: An endoscopic treatment device includes a sheath formed from a resin; a flow-passage formation member attached to a distal end portion of the sheath to be rotatable around a longitudinal axis of the sheath; a pair of forceps pieces supported by the flow-passage formation member such that the pair of forceps pieces are able to be opened and closed; a link mechanism connected to the pair of forceps pieces and configured to open and close the pair of forceps pieces; an operation wire extending along the longitudinal axis of the sheath; and a connection member configured to connect a proximal end arm of the link mechanism and the operation wire.

Abstract: An endoscopic treatment device includes a sheath formed from a resin; a flow-passage formation member attached to a distal end portion of the sheath to be rotatable around a longitudinal axis of the sheath; a pair of forceps pieces supported by the flow-passage formation member such that the pair of forceps pieces are able to be opened and closed; a link mechanism connected to the pair of forceps pieces and configured to open and close the pair of forceps pieces; an operation wire extending along the longitudinal axis of the sheath; and a connection member configured to connect a proximal end arm of the link mechanism and the operation wire.

Abstract: An endoscopic treatment may include a sheath extending in a longitudinal direction, a distal end member having insulation and the distal end member provided at a distal end of the sheath and having a through-hole penetrating in the longitudinal direction. The treatment tool may further include an electrode having a first conduit extending in the longitudinal direction and the electrode being configured to advance and retract into the through-hole. The electrode including a rod extending in the longitudinal direction and configured to be arranged in at least a part of the first conduit.

Abstract: A treatment instrument includes a tube with a conduit; a wire located in the tube so as to advance and retract in the tube, and through which a high frequency current is allowed to flow. The treatment instrument may also include an electrode connected to a distal end of the wire; and a distal end tip located at a distal end portion of the tube, the distal end tip configured to accommodate at least a part of the electrode. The distal end tip includes a passage that connects with an outer peripheral surface and an inner peripheral surface of the distal end tip. The passage connects with the conduit.

Abstract: An endoscope treatment tool includes: a cylindrical distal-end member to be attached to a distal end of an endoscope; a grasping tool that is provided at an outer side surface of the endoscope along a longitudinal axis of the endoscope, that grasps biological tissue, and that is movable in a first direction perpendicular to the longitudinal axis in a state in which the biological tissue is grasped; an electrode that is disposed so as to protrude forward with respect to a distal end of the distal-end member; and an electrode driving portion that is configured to move the electrode in the first direction.

Abstract: An endoscopic treatment device includes a hollow tube; an electrode; and an insulative support member. In a radial direction relative to a longitudinal axis of the hollow tube, the insulative support member is radially outward of the electrode and the hollow tube is radially outward of the insulative support member.

Abstract: An endoscope treatment tool, comprising: a sheath; a handle body; a wire; a treatment portion connected to a distal end of the wire and arranged on a distal end side of the sheath; a rotating handle movable with respect to the handle body and connected to the wire; a conductive connector having an insertion passage through which the wire is inserted, wherein the wire is movable in a wire movement direction to advance and retreat in a direction that is parallel to a longitudinal axis of the handle body, wherein the wire is rotatable around an axis of the wire movement direction, and wherein the conductive connector extends in a direction that intersects the wire movement direction.

Abstract: A high-frequency treatment tool includes: a tubular sheath; a cap member fixed to a distal end of the sheath; and an electrode part provided so as to be relatively movable in a longitudinal direction of the sheath and relatively rotatable about a longitudinal axis of the sheath with respect to the cap member. The electrode part and the cap member are relatively rotated about the longitudinal axis of the sheath while pressing biological tissue stuck to the electrode part against the cap member to separate the biological tissue from the electrode part.

Abstract: An endoscopic treatment device includes a sheath formed from a resin; a flow-passage formation member attached to a distal end portion of the sheath to be rotatable around a longitudinal axis of the sheath; a pair of forceps pieces supported by the flow-passage formation member such that the pair of forceps pieces are able to be opened and closed; a link mechanism connected to the pair of forceps pieces and configured to open and close the pair of forceps pieces; an operation wire extending along the longitudinal axis of the sheath; and a connection member configured to connect a proximal end arm of the link mechanism and the operation wire.

Abstract: An endoscopic treatment device includes a sheath formed from a resin; a tubular hollow needle inserted into the sheath and having a sharp distal end; a rod formed from a metal and having a conduit; a shaft attached to a proximal end of the rod and having an internal space communicating with the conduit of the rod; and an operation portion including (i) a slider attached to a proximal end of the shaft, and (ii) and a lever attached to a proximal end of the hollow needle.

Abstract: An endoscope treatment tool includes: a cylindrical distal-end member to be attached to a distal end of an endoscope; a grasping tool that is provided at an outer side surface of the endoscope along a longitudinal axis of the endoscope, that grasps biological tissue, and that is movable in a first direction perpendicular to the longitudinal axis in a state in which the biological tissue is grasped; an electrode that is disposed so as to protrude forward with respect to a distal end of the distal-end member; and an electrode driving portion that is configured to move the electrode in the first direction.

Abstract: A high-frequency treatment instrument having a sheath; an elongated extension member; a narrow portion provided on an inner surface of the sheath; and a pressing member which allows the elongated extension member to advance and retract only in a part of the sheath. The elongated extension member is advanced to form a first treatment electrode extending along a central axial line of the sheath and the elongated extension member is further advanced to form a second treatment electrode which intersects with the central axial line of the sheath.

Abstract: A stent delivery system includes a tubular stent which is retained in a body cavity of a living body; a pusher tube, whose distal end contacts with a proximal end of the stent, which pushes and moves the stent to a distal end side; a filament which connects the stent with the pusher tube by the proximal end side of the filament being engaged with the pusher tube and by the distal end side of the filament stretching to the stent side so as to penetrate the peripheral wall of the stent; an engaging member which is engaged with a distal end portion of the filament penetrating the peripheral wall of the stent, and which keeps the connecting condition between the stent and the pusher tube by the filament; and a pulling member which pulls a distal end side of the filament into a proximal end side of the pusher tube when the engagement between the engaging member and the filament is released and the connection between the stent and the pusher tube is released.

Abstract: An instrument for an endoscope including a flexible insulative insertion section inserted in an endoscope channel, a tubular first electrode section arranged at a distal end of the insertion section with an insertion hole formed along the axis of the insertion section, a conductive electric wire inserted in the insertion section and movable forward/backward, a control section arranged on the proximal end side of the insertion section and controlling forward/backward movement of the electric wire along the axis, a rod-shaped second electrode section connected to a distal end of the electric wire and inserted so as to be movable forward/backward in the insertion hole, and an external connecting section electrically connected to a proximal end side of the electric wire and applying external currents with predetermined frequencies to the electric wire and the second electrode section.

Abstract: A stent delivery system includes a tubular stent which is retained in a body cavity of a living body; a pusher tube, whose distal end contacts with a proximal end of the stent, which pushes and moves the stent to a distal end side; a filament which connects the stent with the pusher tube by the proximal end side of the filament being engaged with the pusher tube and by the distal end side of the filament stretching to the stent side so as to penetrate the peripheral wall of the stent; an engaging member which is engaged with a distal end portion of the filament penetrating the peripheral wall of the stent, and which keeps the connecting condition between the stent and the pusher tube by the filament; and a pulling member which pulls a distal end side of the filament into a proximal end side of the pusher tube when the engagement between the engaging member and the filament is released and the connection between the stent and the pusher tube is released.

Abstract: A high-frequency treatment instrument for performing a high-frequency treatment on a pathological lesion portion includes an elongated flexible sheath 2, a pair of arm portions 3A and 3B which is disposed in the sheath 2 so as to freely extend and retract, which is in a closed state in the sheath, and which is opened in a direction moving away from a center axial line of the sheath 2 when it protrudes from the distal end of the sheath 2, a linear treatment electrode which is connected to the distal end sides of the pair of arm portions and which is stretched between the arm portions when the pair of arm portions are opened, an operating wire (elongated extension member) which is disposed in the sheath 2 so as to freely extend and retract and the distal end of which is connected to the treatment electrode, and an operating portion, to which the proximal ends of the sheath and the operating wire are connected, and which operates the operating wire to extend and retract relative to the sheath 2.

Abstract: An instrument for an endoscope including a flexible insulative insertion section inserted in an endoscope channel, a tubular first electrode section arranged at a distal end of the insertion section with an insertion hole formed along the axis of the insertion section, a conductive electric wire inserted in the insertion section and movable forward/backward, a control section arranged on the proximal end side of the insertion section and controlling forward/backward movement of the electric wire along the axis, a rod-shaped second electrode section connected to a distal end of the electric wire and inserted so as to be movable forward/backward in the insertion hole, and an external connecting section electrically connected to a proximal end side of the electric wire and applying external currents with predetermined frequencies to the electric wire and the second electrode section.