Endoscopic surgical device, overtube, and exterior tube
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. A contact surface of the overtube body with a body wall is constituted of a wall surface member that serves as a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
1. An endoscopic surgical device comprising:
an endoscope that observes the inside of a body cavity;
a treatment tool that inspects or treats an affected part within the body cavity; and
an overtube that guides the endoscope and the treatment tool into the body cavity,
wherein the overtube includes
an overtube body that passes through a body wall and is inserted into the body cavity,
a slider member provided in the overtube; and
a sleeve member provided in the overtube;
wherein the slider member has a first stopper and a second stopper which are provided separately from each other in a longitudinal axis direction of the overtube,
the sleeve member is slidably located on a first path formed between the first stopper and the second stopper,
the slider member has a first holder part configured to hold the endoscope and a second path through which the endoscope is inserted,
the sleeve member has a third path through which the treatment tool is inserted, and the sleeve member comprises a second holding part configured to hold the treatment tool inserted through the third path,
wherein a contact surface of the overtube body with a body wall includes a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
2. The endoscopic surgical device according to claim 1 ,
wherein the rotation-preventing wall surface is provided with a first concavo-convex part including a groove part or a projection part that is formed along an axial direction of the overtube body.
3. The endoscopic surgical device according to claim 2 ,
wherein a plurality of the first concavo-convex parts are provided in the rotational direction of the overtube body.
4. The endoscopic surgical device according to claim 3 ,
wherein the plurality of first concavo-convex parts are periodically provided in the rotational direction of the overtube body.
5. The endoscopic surgical device according to claim 2 ,
wherein the rotation-preventing wall surface is provided with a second concavo-convex part including a groove part or a projection part that is formed along the rotational direction of the overtube body.
6. The endoscopic surgical device according to claim 5 ,
wherein a plurality of the second concavo-convex parts are provided in the axial direction of the overtube body.
7. The endoscopic surgical device according to claim 6 ,
wherein the plurality of second concavo-convex parts are periodically provided in the axial direction of the overtube body.
8. The endoscopic surgical device according to claim 5 ,
wherein the second concavo-convex part includes a first locking surface that restricts the movement of the overtube body to a distal end side in the axial direction, and a second locking surface that restricts the movement of the overtube body to a base end side in the axial direction.
9. The endoscopic surgical device according to claim 8 ,
wherein each of the first locking surface and the second locking surface includes a surface including a plane perpendicular to the axial direction of the overtube body.
10. The endoscopic surgical device according to claim 1 ,
wherein a range where the sleeve member is movable forward and backward with respect to the slider member is limited.
11. The endoscopic surgical device according to claim 1 ,
wherein a following formula is satisfied when a fixing force for fixing the first holding part to the endoscope is defined as F1 and a fixing force for the second holding part to the treatment tool is defined as F2,
F 1> F 2.
12. The endoscopic surgical device according to claim 1 , further comprising:
a first valve member that is provided in the second path and secures airtightness within the body cavity; and
a second valve member that is provided in the third path and secures airtightness within the body cavity,
wherein following formulas are satisfied when a fixing force for fixing the first holding part to the endoscope is defined as F1, a fixing force for fixing the second holding part to the treatment tool is defined as F2, and a frictional force that the endoscope receives from the first valve member when the endoscope moves forward and backward is defined as F3,
F 1> F 3
F 2> F 3.
13. An overtube comprising:
an overtube body that passes through a body wall and is inserted into a body cavity;
a slider member provided in the overtube; and
a sleeve member provided in the overtube;
wherein the slider member has a first stopper and a second stopper which are provided separately from each other in a longitudinal axis direction of the overtube,
the sleeve member is slidably located on a first path formed between the first stopper and the second stopper,
the slider member has a first holder part configured to hold the endoscope and a second path through which the endoscope is inserted,
the sleeve member has a third path through which the treatment tool is inserted, and the sleeve member comprises a second holding part configured to hold the treatment tool inserted through the third path,
wherein a contact surface of the overtube body with a body wall includes a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
14. The overtube according to claim 13 ,
wherein the rotation-preventing wall surface is provided with a first concavo-convex part including a groove part or a projection part that is formed along an axial direction of the overtube body.
15. The overtube according to claim 14 ,
wherein a plurality of the first concavo-convex parts are provided in the rotational direction of the overtube body.
16. The overtube according to claim 15 ,
wherein the plurality of first concavo-convex parts are periodically provided in the rotational direction of the overtube body.
17. The overtube according to claim 14 ,
wherein the rotation-preventing wall surface is provided with a second concavo-convex part including a groove part or a projection part that is formed along the rotational direction of the overtube body.
18. The overtube according to claim 17 ,
wherein a plurality of the second concavo-convex parts are provided in the axial direction of the overtube body.
19. The overtube according to claim 18 ,
wherein the plurality of second concavo-convex parts are periodically provided in the axial direction of the overtube body.
20. The overtube according to claim 17 ,
wherein the second concavo-convex part includes a first locking surface that restricts the movement of the overtube body to a distal end side in the axial direction, and a second locking surface that restricts the movement of the overtube body to a base end side in the axial direction.
21. The overtube according to claim 20 ,
wherein each of the first locking surface and the second locking surface includes a surface including a plane perpendicular to the axial direction of the overtube body.