Abstract: A treatment device configured to hold a living tissue includes a swing member supported by a first grasping member and rotatable in a first direction and in an opposite direction opposite to the first direction. A support shaft of the swing member is supported on a side close to the distal end including a middle position between the distal end and the proximal end. A first holding surface is provided on the swing member close to a side of the second grasping member and grasps the living tissue. A second holding surface is provided on the second grasping member close to a side of the swing member and which faces the first holding surface and which is configured to hold the living tissue together with the first holding surface of the swing member.

Abstract: A surgical instrument includes an insertion part; a base having a bottom part; first grasping surface; second grasping surface; a plurality of staple disposed between the base and the first grasping surface; first and second staple line consist of the plurality of staple; a groove part; a traction member; a locked part having first and second locked part; and a blade part accommodated in the groove part so as to be capable of advancing and retracting along the longitudinal axis, wherein the first and second wall surfaces are provided to be apart from each other in the cross direction such that when the blade part is positioned between the first and second locked parts in the cross direction, gaps both between the blade part and the first locked part and between the blade part and the second locked part are capable of being formed.

Abstract: A retaining device includes a first member, a second member, a third member, a support section supporting the first member and supporting the second member and the third member movably relative to the first member, and a manipulation part moving the first member, the second member, and the third member relative to each other. The first member and the third member can grasp a first tissue with the first tissue disposed between the first member and the second member and between the first member and the third member, and the first member and the second member can grasp the first tissue and a second tissue such that the second tissue is disposed between the first member and the second member and between the second member and the third member to contact with the first tissue with the first member and the third member grasping the first tissue.

Abstract: A treatment device which applies energy to a biological tissue to treat the biological tissue, includes: an interlocking mechanism that regulates at least one of a closing time until first and second jaws reach a closed state from an opened state when one operation is input into an operating body for a handle, and a unit closing amount from the opened state toward the closed state, interlocks at least one of the first and second jaws with the operating body, and is interposed between the operating body and the handle; and an elastic member that is disposed in the interlocking mechanism, couples the operating body with the handle, pulls the operating body toward the handle at a constant load or a constant pressure, and regulates the closing time until the closed state is reached from the opened state.

Abstract: A treatment device configured to hold a living tissue includes a swing member supported by a first grasping member and rotatable in a first direction and in an opposite direction opposite to the first direction. A support shaft of the swing member is supported on a side close to the distal end including a middle position between the distal end and the proximal end. A first holding surface is provided on the swing member close to a side of the second grasping member and grasps the living tissue. A second holding surface is provided on the second grasping member close to a side of the swing member and which faces the first holding surface and which is configured to hold the living tissue together with the first holding surface of the swing member.

Abstract: A treatment instrument configured to treat living tissue by applying energy includes: first and second holding members; a swing member supported by the first holding member and being rotatable in a first direction and in a second direction opposite to the first direction on a rotation axis as a supporting point; a limiting portion which limits rotation of the swing member in one of the first and second directions; a first holding surface provided on the side of the swing member close to the second holding member and configured to hold living tissue; a second holding surface provided on the side of the second holding member close to the swing member and cooperating with the first holding surface of the swing member to hold the living tissue; and a protrusion forming a clearance between the first and second holding surfaces when the first and second holding surfaces are relatively closed.

Abstract: A surgical device configured to apply energy to a biological tissue as a treatment target, and treat the biological tissue, includes: first and second jaws relatively openable/closable to each other to enable holding the biological tissue including the treatment target and its surrounding tissue; a pair of first holding sections provided respectively on inner sides of outer edges of the first and second jaws, and configured to hold the biological tissue; an energy discharge section provided on at least one of the pair of first holding sections, and configured to give energy for a treatment to the biological tissue; and a pair of second holding sections which are provided respectively between the first holding sections and the outer edges of the first and second jaws, and configured to hold the surrounding tissue of the biological tissue while bending the surrounding tissue with respect to the biological tissue.

Abstract: Provided is a medical treatment instrument including: a pair of openable/closable pinching portions that pinch a body tissue via a pair of pinching surfaces facing each other; an energy output section provided in at least one of the pair of pinching portions, the energy output section including an energy application surface as at least one of the pair of pinching surfaces; a cutting member capable of advancing/retracting inside the pinching portion; a guiding groove including a recess portion in the energy application surface, the guiding groove guiding the cutting member; and a plurality of gap maintaining portions provided at a fixed interval along an axial direction at an end face of the guiding groove in such a manner that the end face on the guiding groove side and an inner face on the energy output section side are flush with each other.

Abstract: A treatment portion of a treatment device includes a pair of jaws, an energy emitter, a base having has electric insulation, an outer edge, first to third channels and a support portion. The first channel is formed by the energy emitter, the base, and the outer edge, fluid emanating from the living tissue of the treatment target flows into the first channel. The second channels are provided between the base and the outer edge. The third channel is provided between the outer edge and the energy emitter to allow the fluid emanating from the living tissue to flow toward the first channel. The support portion couples the base to the outer edge so that the fluid emanating from the living tissue flows into the first channel, and supports the living tissue to prevent it from coming into the first channel when it is held between the pair of jaws.