Abstract: An endoscope system has an overtube having a proximal end and a distal end, and a main lumen and a sub lumen; an endoscope having a channel and inserted into the main lumen; a flexible shaft being advanceable and retractable in the sub lumen; a curved needle having a proximal end and a distal end; and a needle holder configured at a distal end of the shaft to hold the curved needle, wherein the held curved needle is movable to a first position protruding from a distal end opening of the sub lumen, and due to a rotation around the longitudinal axis, part of the curved needle held by the needle holder is movable from the first position in front of the distal end opening of the sub lumen to a second position in front of the channel of the endoscope inserted into the main lumen.

Abstract: An endoscopic treatment device has a sheath extending between a distal end portion and a proximal end portion; a first/second wire inserted through the sheath, wherein the first/second wire can protrude from the distal end portion of the sheath and cut tissue by being applied with current; an insulative member configured to connect distal ends of the first wire and the second wire; and a first/second insulative tube configured to cover the first/second wire protruding from the sheath, wherein the first/second insulative tube can move with respect to the first/second wire respectively, wherein the endoscopic treatment device switches between a first state where the second wire protruding from the sheath is covered by the second insulative tube and a second state where the first wire protruding from the sheath is covered by the first insulative tube.

Abstract: A method for anastomosing an alimentary tract according to a first aspect of the invention includes a first step of inserting an endoscope into an alimentary tract through a natural opening in a state where a distal end part of a tube body is coupled to an outer periphery of a distal end part of the endoscope; a second step of making a hole in a tract wall of the alimentary tract; a third step of inserting the tube body through the hole; a fourth step of grasping the distal end part of the tube body disposed through the hole; a fifth step of separating the tube body from an outer periphery of the distal end part of the endoscope; and a sixth step of delivering the treatment part up to the hole after the fifth step.

Abstract: In a tissue binding method, a ring-shaped part (15) of a snare wire (10b) is disposed at a position surrounding a binding target site, the tissue at the binding target site is pulled while the ring-shaped part (15) is pressed against the tissue around the binding target site at a plurality of pressing points that are located away from each other in the circumferential direction of the ring-shaped part (15), and, in a state in which the tissue at the binding target site is pulled, the diameter of the ring-shaped part (15) is reduced to bind the tissue, while adjusting the position in the pressing direction at one or more of the pressing points.

Abstract: An endoscope system has an overtube having a proximal end and a distal end, and a main lumen and a sub lumen; an endoscope having a channel and inserted into the main lumen; a flexible shaft being advanceable and retractable in the sub lumen; a curved needle having a proximal end and a distal end; and a needle holder configured at a distal end of the shaft to hold the curved needle, wherein the held curved needle is movable to a first position protruding from a distal end opening of the sub lumen, and due to a rotation around the longitudinal axis, part of the curved needle held by the needle holder is movable from the first position in front of the distal end opening of the sub lumen to a second position in front of the channel of the endoscope inserted into the main lumen.

Abstract: Provided is a digestive-tract treatment method including: pulling, inside a digestive tract (A), an end portion of a first wall portion (A1) positioned at a rim of a treatment target site (B), and moving the first wall portion (A1) to a position on a second wall portion (A2) on an opposite side of the treatment target site (B) from the first wall portion (A1); and joining the first wall portion (A1) and the second wall portion (A2) in a state in which the first wall portion (A1) and the second wall portion (A2) are layered.

Abstract: An endoscopic treatment device has a sheath extending between a distal end portion and a proximal end portion; a first/second wire inserted through the sheath, wherein the first/second wire can protrude from the distal end portion of the sheath and cut tissue by being applied with current; an insulative member configured to connect distal ends of the first wire and the second wire; and a first/second insulative tube configured to cover the first/second wire protruding from the sheath, wherein the first/second insulative tube can move with respect to the first/second wire respectively, wherein the endoscopic treatment device switches between a first state where the second wire protruding from the sheath is covered by the second insulative tube and a second state where the first wire protruding from the sheath is covered by the first insulative tube.

Abstract: A device suturing device includes a flexbile tubular insertion portion; a suturing portion disposed at a distal end portion thereof holding a tubular anchor through which a suture thread is insertable; an operation portion disposed at a proximal end portion of the insertion portion; and a suture thread grasping portion inserted through the insertion portion and insertable through the anchor, wherein the suturing portion includes an installation surface on which the anchor is held; a pressing member including a convex portion being arranged to face the installation surface for pressing the anchor; and a driver operating the pressing member via the operation portion, wherein a concave portion is formed on the installation surface into which the convex portion is enterable, and the anchor is sandwiched between the concave portion and the convex portion to be swaged and deformed such that the suture thread is fixed to the anchor.

Abstract: A method of delivering and recovering a curved needle includes a step of inserting a first needle holder into abdominal cavity, a step of inserting a second needle holder holding a curved needle into gastrointestinal tract, a step of penetrating gastrointestinal wall with the curved needle to protrude the curved needle to the abdominal cavity, a step of removing the curved needle from the gastrointestinal wall and delivering the curved needle and the suture thread to the abdominal cavity, a suture step of suturing tissues in the abdominal cavity, a step of protruding the curved needle to the gastrointestinal tract, a step of removing the curved needle from the gastrointestinal wall and returning the curved needle from the abdominal cavity to the gastrointestinal tract, and a step of taking out the curved needle from the gastrointestinal tract to outside of body to recover the curved needle.

Abstract: A pushing tool of the present invention includes a tissue pushing part having a shaft portion that is formed in a rod-shape, a linear portion including a pressing portion that is connected to the shaft portion and extends in a longitudinal direction, and a stopper maintaining an angle between the shaft portion and the linear portion at a desired angle when the pressing portion is closely pressed against an outer surface of a hollow organ.

Abstract: A medical instrument introduction device, includes an outer tube portion indwelled within a body wall; and an inner needle portion inserted through the outer tube portion, wherein the outer tube portion includes a base portion; a tubular conduit portion whose proximal end portion is connected to the base portion; and an anchor portion connected to a distal end portion of the conduit portion, wherein the conduit portion has a bellows folded shape in a natural state, a dimension of the conduit portion in an axial direction being capable of being increased as the folded shape is stretched by the inserted inner needle portion, and a force needed for stretching the folded shape being gradually decreased in a direction from the proximal end portion to a distal end portion of the conduit portion, and the anchor portion and the inner needle potion are couplable with each other.

Abstract: In a tissue binding method, a ring-shaped part (15) of a snare wire (10b) is disposed at a position surrounding a binding target site, the tissue at the binding target site is pulled while the ring-shaped part (15) is pressed against the tissue around the binding target site at a plurality of pressing points that are located away from each other in the circumferential direction of the ring-shaped part (15), and, in a state in which the tissue at the binding target site is pulled, the diameter of the ring-shaped part (15) is reduced to bind the tissue, while adjusting the position in the pressing direction at one or more of the pressing points.

Abstract: A suture body includes: a suture thread having a first end and a second end and fixed to a living tissue; a suture needle connected to the first end; and a thread fixing member connected to the second end. The thread fixing member includes: a rod-shaped protruding portion; and an elastic member having an outer circumferential surface and arranged so that the thread fixing member is in contact with the outer circumferential surface at a predetermined contact pressure. The suture body is configured so that the suture thread can enter between the protruding portion and the elastic member by elastically deforming the elastic member. The suture body further includes a base body to which the protruding portion and the elastic member are fixed. The protruding portion and the elastic member are arranged in an area surrounded by an outer diameter of the base body.

Abstract: A method for anastomosing an alimentary tract according to a first aspect of the invention includes a first step of inserting an endoscope into an alimentary tract through a natural opening in a state where a distal end part of a tube body is coupled to an outer periphery of a distal end part of the endoscope; a second step of making a hole in a tract wall of the alimentary tract; a third step of inserting the tube body through the hole; a fourth step of grasping the distal end part of the tube body disposed through the hole; a fifth step of separating the tube body from an outer periphery of the distal end part of the endoscope; and a sixth step of delivering the treatment part up to the hole after the fifth step.

Abstract: A suture member includes: a suture needle of which a distal end is sharp; a suture thread which includes a first end portion and a second end portion, of which the first end portion is connected to the suture needle, and which sutures the tissue; a first loop portion which has a ring shape, through which the suture needle is capable of passing, and which is connected to the second end portion; and a second loop portion which has a ring shape, through which the suture needle is capable of passing, which is connected to the second end portion, and which is provided to separate from the first loop.

Abstract: A tissue removal system is provided which enables optimally performing a full-thickness resection of a hollow organ while minimizing invasiveness. In this tissue removal system, a tissue pressing tool which has a tissue contacting part and which is guided into the abdominal cavity, and a resection and anastomosis device work together. The resection and anastomosis device resects and performs anastomosis of tissue positioned between a main body and an anvil part, and, when pressing the tissue to be cut to the cutting position of the resection and anastomosis device by means of the tissue contacting part, the tissue contacting part is pressed against two abutment parts of the resection and anastomosis device.

Abstract: A method of delivering and recovering a curved needle includes a step of inserting a first needle holder into abdominal cavity, a step of inserting a second needle holder holding a curved needle into gastrointestinal tract, a step of penetrating gastrointestinal wall with the curved needle to protrude the curved needle to the abdominal cavity, a step of removing the curved needle from the gastrointestinal wall and delivering the curved needle and the suture thread to the abdominal cavity, a suture step of suturing tissues in the abdominal cavity, a step of protruding the curved needle to the gastrointestinal tract, a step of removing the curved needle from the gastrointestinal wall and returning the curved needle from the abdominal cavity to the gastrointestinal tract, and a step of taking out the curved needle from the gastrointestinal tract to outside of body to recover the curved needle.

Abstract: A medical system including a grasp device having a longitudinal portion and an end effector attached to the longitudinal portion; an overtube having a collection lumen and a water supply lumen through which the longitudinal portion is inserted and having a distal end opening positioned inside the collection lumen; and an aspirator connected with the collection lumen, wherein the end effector further has a first member; and a second member mounted so as to open and close the end effector by moving relatively to the first member, wherein the second member forms an interior space between the first member and the second member for accommodating the tissues and has an opening communicating with the interior space when the end effector is closed, and the proximal end portion of the second member is enterable into the collection lumen.

Abstract: A constriction removal method using a high-frequency knife (8) and a collecting instrument (7) having a longitudinal axis and an increasing-diameter part (12), whose diameter can be increased, at the distal end, the constriction removal method including: inserting the collecting instrument (7) from a proximal end opening of a constricted lumen of a constricted portion; allowing the increasing-diameter part (12) to pass through the constricted lumen and to project from the distal-end opening of the constricted lumen and allowing the diameter of the increasing-diameter part (12) having passed through the constricted lumen to increase toward the radially outer side of the constricted lumen; hooking ends of the increasing-diameter part (12) having passed through the constricted lumen on an edge of the distal-end opening of the constricted lumen; positioning the high-frequency knife (8) on the radially outer side of the proximal end opening of the constricted lumen; cylindrically coring out the constricted lumen w

Abstract: Provided is a digestive-tract treatment method including: pulling, inside a digestive tract (A), an end portion of a first wall portion (A1) positioned at a rim of a treatment target site (B), and moving the first wall portion (A1) to a position on a second wall portion (A2) on an opposite side of the treatment target site (B) from the first wall portion (A1); and joining the first wall portion (A1) and the second wall portion (A2) in a state in which the first wall portion (A1) and the second wall portion (A2) are layered.