| 摘要 |
<p>An over tube 50 is formed by a tube body 51, and a gripping part 52 in which a liquid storing part 53 is formed. A connecting port 52A formed at a tip end of the gripping part 52 is fitted into a base end opening 51A of the tube body 51 in a watertight state, so that the gripping part 52 is constructed attachably and detachably with respect to the tube body 51. The liquid storing part 53 is formed into a spherical shape with a larger diameter than a diameter of the tube body 51, and an arc-shaped recessed portion 80 is formed in an inside of the liquid storing part 53. A sponge 82 formed into a donut shape is housed in this recessed portion 80. During an operation, a body fluid flowing backward from a gap between the tube body and an insertion section 12 is stored in the recessed portion 80 and is absorbed in the sponge 82, thus preventing liquid leakage from the recessed portion 80.</p> |
