| 摘要 |
<p>The insertion end (30) of a scirroscope includes a sheath (3) a channel (4) for feeding water or passing a treatment instrument therethrough, an optics tube (6) in which an observation optical system is disposed, and a bundle (7) of optical fibers which defines an illumination optical system. An elastic member (21, 22, 23) covers either partly or entirely the internal periphery of the sheath (3) and/or the external periphery of the channel (4), the optics tube (6) and the fibre bundle (7). This renders the scirroscope more robust and less prone to cracking during sterilization. </p> |
