Stent delivery system for placing stent across adjacent tissue layers

A stent delivery system comprising:

• a fixed tube comprising a first passage provided therein, with a plurality of first catch grooves provided along an outer surface of the fixed tube in a longitudinal direction;
• a first handle comprising an inner second passage provided in the first handle and allowing a portion of the fixed tube to be inserted into the inner second passage so that the first handle is movable forward and backward along the outer surface of the fixed tube, a button hole provided in an outer surface of the first handle and connected to the second passage, and a guide rod protruding outward from the outer surface of the first handle in an opposite direction to the fixed tube, wherein a third passage is provided in the guide rod to be connected to the second passage, first and second guide holes are provided on respective sides of an outer surface of the guide rod in the longitudinal direction to be connected to the third passage, a fixing portion is provided at a rear end portion of the third passage, a plug is mounted on the guide rod around the fixing portion, and first and second catch protrusions protrude from respective ends of the second guide hole adjacent to the second passage and the fixing portion, respectively;
• a first locking member comprising a seesaw member rotatably mounted in the second passage and having a third catch protrusion and a pressing portion protruding from respective sides and a hinge protruding from an intermediate portion, a spring configured to press the third catch protrusion to be inserted into and caught by the first catch groove;
• and a button mounted in the button hole to be moved up and down so that when the pressing portion is pressed, the button disengages the third catch protrusion from the first catch groove;
• a second locking member comprising a second handle mounted on the outer surface of the guide rod to be movable forward and backward and a moving member inserted into the third passage, wherein the moving member comprises first and second guide portions provided on an outer surface of the moving member, extending through the first and second guide holes, respectively, and fixed to the second handle and second and third catch grooves provided on an outer surface of the second guide portion, such that when moved forward or backward by the second handle, the first and second catch protrusions are inserted into and caught by the second and third catch grooves;
• an outer tube, wherein one side of the outer tube is fixed to the moving member and the opposite side of the outer tube protrudes from the fixed tube;
• and
• an inner tube member inserted into an interior of the outer tube, wherein one end of the inner tube member is fixed to the fixing portion, an electrocautery tip is provided on the opposite end of the inner tube member to be caught by the outer tube, the electrocautery tip cauterizing two adjacent inner cavities in a body to form holes, a mounting space is provided behind and adjacent to the electrocautery tip at one opposite side, the stent, which connects the pair of holes, is mounted in the mounting space by being pressed by the outer tube, and a wire connected to the plug is inserted into the inner tube member and connected to the electrocautery tip.