Abstract: An aim of the invention is to provide a safe, quick and cheap reuse of an endoscopic tube, simplification of its construction; the technical task is creation of an endoscope with an endoscopic tube without cavities which require complicated washing. The endoscope comprises: an endoscopic tube, comprising an instrumental channel with a lateral output directed on an objective lens and with a diameter of a direct output close to the diameter of the distal part of instrument, an external tubular element in a shape of a tube, where one end is bifurcated and adjusted for connection with an instrumental channel and for introduction of instrument, and the other end is branched and adjusted for connection with pressure sources, valves which squeeze the lumens of branches, but at switching on—release them.

Abstract: The invention is intended for secure emptying of organism's cavities, particularly for colon decompression. The device combine the drain with means of its delivery in the shape of everting by fluid invaginator, comprising the drain, as well as their intractor. The secure emptying of cavity is ensured by a hose with punctures, placed in drain. The liquid, feeding into hose, realizes drain's recanalization, irrigates its holes and dilutes cavity contents. Transportation of drain into colon is ensured by synergy of two intubation forces. The vanguard force is generated by fluid pressure which everts invaginator, the rearguard (extraanal)—by “cylinder-piston” unit with a cuff. The hollow unit's piston acts as pneumatic carriage, but cuff is periodically joining with invaginator with drain or intractor. Evacuaton of contents is ensured by influx-and-extract method. The sequential connection of intractor and drain ensures not only intubation, but also contents' evacuation through both ends of drain.