| 摘要 |
<p>Disclosed is an endoscope overtube which makes it possible to reduce friction during rotation. The endoscope overtube according to the present invention comprises a first insertion passage for the insertion of an endoscope, and comprises, inside the wall forming the first insertion passage, a second insertion passage for the insertion of a treatment instrument, the second insertion passage comprising an opening in the side surface thereof which passes through the surface of the overtube.</p> |
