| 摘要 |
<p>When an observation unit is attached to a catheter tube having a first inflatable balloon on a tube body and a second balloon which is set uninflated in the tube body and can be extended from the tube body to be inflated, the catheter tube can be used as an endoscope for observing the interior of a body cavity and giving a medical treatment thereto from a position outside the body. This tube is capable of defining an observation space of an arbitrary length between the first and second balloons, and preventing the entry of a body fluid, such as blood, thereinto. This enables a transparent visual field to be obtained.</p> |
