The light guide tube is an important endoscope parts. The endoscope connects to the video processor and light source via the light guide connector. Power and light (and in more complex scopes, a suction channel, air/water channels) travel up through the umbilical cord to connect to the main control body. For Olympus, Pentax, Fuji.
Flexible scopes consist of the insertion tube, bending section, light guide tube, water/suction valve, stress boot, knob, light guide beam connector, light guide fiber, bendable image beam, and other important accessories. The structure of the flexible scope seems simple, but in fact, it contains many small accessories, and these small accessories are an important part of the composition of it, they are indispensable.