| 摘要 |
A guide tube assembly for an endoscope is disclosed which is usually flexible and which can be stiffened when necessary. The assembly comprises a flexible body which is usually flexible because its components are separable from each other, while the assembly can be stiffened when necessary by drawing the components together and a porous tube of fluorocarbon is inserted in the flexible body joining the forward ends of the components together. Usually, the assembly can freely be bent. But, the assembly can be stiffened by pulling the rear end of the porous tube for drawing the components together when necessary. In this way, the assembly can pass through the circuitous path of the body cavity with an endoscopic instrument, while it can fix the distal end of the endoscopic instrument in position toward an object to be observed for inspection. |
