Abstract: A clip device includes an arm portion including a plurality of arms that are biased to an open state; a pressing tube into which a proximal-end portion of the arm portion is accommodated and configured to be able to lock the arm portion in a closed state; an insertion portion connected to a proximal-end opening of the pressing tube at a distal end of the insertion portion; a power transmission member extending through the insertion portion; a link configured to detachably connect a distal-end portion of the power transmission member and a proximal-end portion of the arm portion; a first stopper configured to regulate the distal-end portion of the power transmission member from protruding from a distal-end opening of the pressing tube, and a switching portion configured to switch the clip device between a first state and a second state.

Abstract: An endoscope treatment instrument having a sheath, a rotation axis extending in a width direction orthogonal to a longitudinal direction of the sheath, a plate formed with a first opening through which the rotation axis passes and a second opening having a width different from the width of the first opening, a forceps piece rotatably supported about the first opening and the rotation axis passing through the second opening, and a wire connected to a proximal end portion of the plate.

Abstract: An electrode with a conduit includes: a tubular portion internally provided with a first conduit; a distal end portion provided at the distal end of the tubular portion; a second conduit that is provided inside the distal end portion, the second conduit being configured to communicate with the first conduit; an opening configured to communicate with the first conduit and the second conduit; a first hemostatic surface that has a flat surface extending from the distal end of the tubular portion in an extending direction of the second conduit, and serves as an electrode configured to cause a high-frequency current to flow through a biological tissue; and a second hemostatic surface that is connected to a distal end side of the first hemostatic surface and is provided at an end portion protruding toward a distal end side from the opening.

Abstract: A clip cartridge includes a clip unit having a pressing tube, an arm member and a connection portion. The connection portion can transition between a protrusion configuration and an accommodation configuration. The clip cartridge also includes a housing that can accommodate the clip unit. The housing has a stopper that restricts movement of the connection portion and a release mechanism or a groove that permits movement of the connection portion. The stopper is able to restrict movement of the clip unit by contacting the arm member or the pressing tube.

Abstract: A medical device includes a clip having an arm member and a pressing tube configured to receive the arm member; an applicator having an operation wire configured to advance and retract to open and close the arm member and a sheath configured to accommodate the operation wire; and a link configured to engage the operation wire with the clip and transition between an engagement configuration in which the clip and the operation wire is engaged with each other and a release configuration in which the engagement of the clip and the operation wire is released.

Abstract: A medical instrument has a capsule; an arm member disposed to protrude from the capsule; an operation wire connected to the arm member; a sheath configured to accommodate the operation wire; and a link configured to connect the sheath with the capsule, wherein the link has an engaging portion including a first surface intersecting with the longitudinal axis; and an engaged portion movable to an opposite position opposite to the first surface and a position spaced away from the first surface in spite of a relative position of the capsule with respect to the sheath, and configured to restrict a separation of the capsule with respect to the sheath when the engaged portion is disposed at the opposition position to contact the first surface, and wherein the capsule is rotatable in response to a rotation force from the sheath when the engaged portion is disposed at the opposition position.

Abstract: A cartridge accommodates a clip unit including an arm member and a tubular housing, and is configured so that the clip unit is able to be mounted in an applicator having a sheath and an operation wire. The cartridge includes a main body in which an insertion hole into which the sheath is inserted is formed and a pusher configured to be movable with respect to the main body. The pusher is configured to come into contact with an engaging member provided in the sheath by moving the sheath with respect to the main body in a state in which the sheath is inserted into the insertion hole. The pusher is configured to push the engaging member against the housing, and to engage the sheath with the housing by engaging the engaging member with both the housing and the sheath.

Abstract: A medical instrument has a capsule; an arm member disposed to protrude from the capsule; an operation wire connected to the arm member; a sheath configured to accommodate the operation wire; and a link configured to connect the sheath with the capsule, wherein the link has an engaging portion including a first surface intersecting with the longitudinal axis; and an engaged portion movable to an opposite position opposite to the first surface and a position spaced away from the first surface in spite of a relative position of the capsule with respect to the sheath, and configured to restrict a separation of the capsule with respect to the sheath when the engaged portion is disposed at the opposition position to contact the first surface, and wherein the capsule is rotatable in response to a rotation force from the sheath when the engaged portion is disposed at the opposition position.

Abstract: A medical instrument has a capsule; an arm member disposed to protrude from the capsule; an operation wire connected to the arm member; a sheath configured to accommodate the operation wire; and a link configured to connect the sheath with the capsule, wherein the link has an engaging portion including a first surface intersecting with the longitudinal axis; and an engaged portion movable to an opposite position opposite to the first surface and a position spaced away from the first surface in spite of a relative position of the capsule with respect to the sheath, and configured to restrict a separation of the capsule with respect to the sheath when the engaged portion is disposed at the opposition position to contact the first surface, and wherein the capsule is rotatable in response to a rotation force from the sheath when the engaged portion is disposed at the opposition position.