Overtube and endoscopic treatment system

摘要

An overtube includes an insertion part that is inserted into a subject and has a lumen through which a device inserting part of a device whose distal end bends freely for performing a medical procedure inside a body is removably inserted and a bending part that bends the distal end side of the lumen, in which the bending part is provided with a bending tube having a plurality of joint rings that are connected via connecting shafts along the lumen to freely turn and a braided tube that is disposed on the inner side of the bending tube and forms the periphery of the lumen.