Abstract: A guide tube comprising a tube body having a throughhole penetrated therethrough in the axial direction and a mouthpiece provided at the rearward end of the tube body, or comprising a tube body having a throughhole penetrated therethrough in the axial direction, a connector provided at the rearward end of the tube body and a mouthpiece engageable with and detachable from the connector, the tube body being embedded with a coil spring in the tube wall and cut slantly to the axial direction at the forward end, and the mouthpiece having a circular or elliptical cross-sectional shape, a rib at the forward end and a flange at the rearward end, and the connector being in a structure engageable with and detachable from the mouthpiece and having at the rearward end a sealing film member with a slit or a perforation at the center facilitates passage of an endoscope through the phalynx to the esophagus, simplifies washing of or aspiration from the esophagus or stomach and shortens the treating time and reduces a painful

Abstract: A slidable kit for endoscopic ligation of gastric and esophageal varices comprises an endoscope-inserting cylinder and a ligating device coaxially and integrally secured to the endoscope-inserting cylinder, where the ligating device is in such a structure that a slide cylinder having an annular rib on the outer periphery at the rearward end is inserted into an outer cylinder having an annular rib on the inner periphery at the forward end; an inner cylinder is inserted into the slide cylinder; the outer cylinder and the inner cylinder are integrated together at the rearward ends and firmly secured to the forward end of the endoscope-inserting cylinder; an elastic O ring is mounted on the outer periphery at the forward end of the inner cylinder; a seal ring is provided at the rearward end of the slide cylinder, thereby keeping an annular space between the outer cylinder, the inner cylinder and the slide cylinder hermetic; the slide cylinder is slidable forwards by a liquid introduced into the annular space thro