| 摘要 |
Provided are a sheathing tube and an endoscopic surgical device capable of selectively switching between a state where a tubular member (overtube or the like) is rotatable around an axial direction and a state where the tubular member is not rotatable, with a simple operation. An outer port 500 to which the invention is applied is a sheathing tube sheathing an overtube 300 to be inserted into a body wall and prevents rotation or forward and backward movement of the overtube with respect to the body wall. The sheathing tube includes an insertion part 540 (inner tube 552) having a distal end opening from which the overtube 300 is delivered; a head part 560 that is rotatably connected to a base end of the inner tube 552 and has a base end opening into which the outer port 560 is introduced; a pressure-contact member 576 that is provided in the outer port 560 and restricts the rotation of the overtube 300; a spring member 578 that is disposed between the inner tube 552 and the head part 560 and is deformable between a rotation locked state where rotation of the head part 560 with respect to the inner tube 552 is restricted by engagement of the spring member 578 with the base end of the inner tube 552, and a rotation unlocked state where the engagement is released and the rotation of the head part 560 with respect to the inner tube 552 is allowed; and a rotation operating member 590 that is rotatably provided in the head part 560 and deforms the spring member 578 between the rotation locked state and the rotation unlocked state. |
