Abstract: An outer port sheathing an overtube, includes: a first cylindrical member having a distal end opening from which the overtube is delivered; a second cylindrical member that is rotatably connected to the first cylindrical member and has a base end opening into which the overtube is introduced; rotation restriction means that restricts rotation of the overtube with respect to the second cylindrical member; a spring member that is deformable between a rotation locked state where rotation of the second cylindrical member with respect to the first cylindrical member is restricted by engagement of the spring member with the first cylindrical member, and a rotation unlocked state where the engagement is released and the rotation is allowed; and a rotation operating member that is rotatable in an axial direction of the second cylindrical member and deforms the spring member between the rotation locked state and the rotation unlocked state.

Abstract: A syringe device includes a syringe body; a first space defined inside the syringe body; a plunger body being slidable inside the syringe body and varies the volume of the first space; a second space defined inside the plunger body; a plunger rod being slidable inside the plunger body and varies the volume of the second space; a coil spring that urges the plunger rod in a direction expanding the volume of the second space; a first communication passage and a second communication passage that communicate the first space with the second space; and a check valve member that forms an orifice that restricts the flow of a fluid between the first space and the second space in the first communication passage, and a check valve that allows only the flow of the fluid from the second space to the first space in the second communication passage.

Abstract: An overtube to be inserted into a body wall is provided with an endoscope insertion passage and a treatment tool insertion passage, the treatment tool insertion passage is provided parallel to a reference axis of the overtube, and the endoscope insertion passage is provided obliquely to the reference axis. A slider, which is engaged with the endoscope and the treatment tool inserted through the respective insertion passages and causes the endoscope and the treatment tool to interlock with each other and move forward and backward, is arranged inside the overtube so as to be movable in a forward-backward direction of the overtube. An endoscope engagement part engaged with the endoscope in the slider is movable in an upward-downward direction, and moves upward and downward along the position of the oblique endoscope insertion passage together with the movement of the slider in the forward-backward direction.

Abstract: An object of the present invention is to provide an endoscopic surgery device and an outer tube, capable of easily obtaining an image desired by an operator to facilitate treatment as well as of performing minimally invasive surgery. In the endoscopic surgery device and the outer tube, an endoscope and a treatment tool are inserted into a body cavity through an outer tube. The outer tube is provided with a built-in slider. The slider is provided so as to be axially movable in the outer tube body. The endoscope and the treatment tool, inserted into the outer tube, are held by the slider. Moving the treatment tool allows endoscope to be moved in conjunction with the movement of the treatment tool.

Abstract: An endoscope and a treatment tool which are inserted into an outer tube can move back and forth in interlock with each other, and an operation part of the treatment tool can be prevented from interfering with a proximal end of the endoscope when inserting the treatment tool into the outer tube. An endoscopic surgery device satisfies the following expressions: Lt?Ls<Lh, and Lh?Ls1+Ls+t, where Lt is a length of the outer tube, Ls is a length of a hard part of the insertion part of the endoscope, Lh is a length of a hard part of the insertion part of the treatment tool, Ls1 is a minimum projection length of a distal end of the insertion part of the treatment tool with respect to a distal end of the insertion part of the endoscope, and t is an allowance amount.

Abstract: An insertion part of an endoscope and an insertion part of a treatment tool, which are inserted in an outer tube, can be synchronously moved in the axial direction, and, even when the insertion part of the treatment tool is slightly moved in the axial direction, an excellent endoscopic image without shake is obtained. When a treatment tool of an endoscopic surgery device moves by a displacement amount over an allowance amount, an endoscope moves in interlock with the movement of the treatment tool. Moreover, the treatment tool 50 moves in the axial direction with the allowance amount t with respect to the endoscope 10. Therefore, when the treatment tool is moved by a displacement amount of allowance amount or less, the endoscope does not move. By providing such allowance amount, slight movement of the treatment tool is not transmitted to the endoscope.

Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. F1>F2 is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope tool is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

Abstract: A surgical device, an outer tube, an endoscope, and a treatment tool that have a simple configuration and excellent operability are provided. The outer tube includes a slider in an outer tube body. When the endoscope and the treatment tool are inserted into the outer tube, the endoscope and treatment tool are held by an endoscope holding part and a treatment tool holding part each being provided in the slider so as to be integrated. When the treatment tool is moved in the axial direction, the endoscope is moved in the axial direction in interlock with the movement. In the outer tube, the opening type hermetic valve part for the endoscope in a valve member has the inner diameter larger than the inner diameter of the elastic member for causing the endoscope holding part to hold the endoscope.

Abstract: An insertion part of an endoscope and an insertion part of a treatment tool, which are inserted in an outer tube, can be synchronously moved in the axial direction, and, even when the insertion part of the treatment tool is slightly moved in the axial direction, an excellent endoscopic image without shake is obtained. When a treatment tool of an endoscopic surgery device moves by a displacement amount over an allowance amount, an endoscope moves in interlock with the movement of the treatment tool. Moreover, the treatment tool 50 moves in the axial direction with the allowance amount t with respect to the endoscope 10. Therefore, when the treatment tool is moved by a displacement amount of allowance amount or less, the endoscope does not move. By providing such allowance amount, slight movement of the treatment tool is not transmitted to the endoscope.

Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and in which operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. The overtube body is configured to allow the treatment tool to rotate around an axis thereof without changing the positional relationship of the endoscope and the treatment tool with respect to the overtube body.

Abstract: The outer tube includes two insertion holes which are formed in a cross-sectional D-shape via a partition wall provided in the central part in a cross-section vertical to respective axial directions of the insertion holes. A slit of a valve body located in the insertion hole is disposed along reference line passing through centers of respective arcs of the insertion holes as seen from the axial directions of the insertion holes. Therefore, two leaflets of the slit abut on an arc edge of the insertion hole and a D-shaped cut part of the partition wall respectively when the insertion part of the treatment tool is internally fitted, and they are deformed into the same shape. Since there is no difference in stress applied to two leaflets, it is possible to secure the airtightness by the slit over a long period of time.

Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. F1>F2 is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope tool is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

Abstract: The overtube includes an interlocking member which is configured to be movable forward and backward inside an overtube body—and has an endoscope-coupled part and a treatment tool-coupled part. A side hole that is formed to pass through a side wall of the overtube body in communication with a passage in the overtube body for sending a fluid into a body cavity, and a side wall is configured to be openable and closable by the forward and backward movement of the interlocking member.

Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided in the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A side hole for sending a fluid into a body cavity is formed in a side wall of the overtube body, and a side wall is configured to be openable and closable by the forward and backward movement of the slider.

Abstract: An overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided in the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A fluid-supplying connector that is provided on a base end surface of the overtube body, and has an axial direction that is made parallel to a longitudinal axis of the overtube body, and is detachably connected to an air supply tube for sending fluid into the body cavity through an internal space of the overtube body.

Abstract: A surgery system includes an overtube that has a distal end, a proximal end, and a longitudinal axis and holds a treatment tool and an endoscope so as to be movable forward and backward in a direction of the longitudinal axis. The overtube has an endoscope holding part that has an endoscope holding surface for holding the endoscope and allowing circumferential rotation of the endoscope about a central axis of the endoscope, and a treatment tool holding part that has a treatment tool holding surface for holding the treatment tool. The surgery system further includes an endoscope that is inserted into the overtube and has a held surface held by the endoscope holding surface. The endoscope has an orientation maintaining part that maintains the circumferential orientation of the endoscope even in a case where the overtube rotates around the longitudinal axis.

Abstract: Provided are a surgery system that can ensure insulation between an endoscope and a treatment tool. The endoscope has an insertion part that is insertable into an overtube and has a distal end, a proximal end, and a longitudinal axis, and is locked to the movable body by an endoscope holding part. The endoscope has a first insertion part that is provided on a distal end side of the insertion part, a second insertion part that is provided on a proximal end side of the first insertion part and has an external diameter larger than that of the first insertion part, and a held part that is provided from a distal end of the second insertion part toward a proximal end side thereof, is held by the endoscope holding part, and has at least a surface formed of an insulating member having an insulation property.

Abstract: An overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided in the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A fluid-supplying connector that is provided on a base end surface of the overtube body, and has an axial direction that is made parallel to a longitudinal axis of the overtube body, and is detachably connected to an air supply tube for sending fluid into the body cavity through an internal space of the overtube body.

Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. The overtube body includes a distal-end-side stopper and a base-end-side stopper that restrict the movable range of the slider. A length L from a coupling position of the endoscope to a distal end position of the overtube body and a length Ls from the coupling position of the endoscope to a distal end position of the endoscope are set to satisfy Ls?L.