Stent delivery system for depoying stent across adjacent tissue layers

Abstract

The present invention relates to a stent delivery system that is easy to operate, which allows for easy movement or fixation of an electrocautery tip in adjacent tissue layers, that is, two adjacent lumens within the body, and allows for easy deployment of a stent to connect the holes of the two adjacent lumens formed by the electrocautery tip. More specifically, the invention relates to a stent delivery system characterized in that a first handle that moves the electrocautery tip is moved or fixed in a fixed tube by a first locking member that operates semi-automatically, and a second handle that moves the outer tube for stent deployment is moved or fixed in a guide rod of the first handle by a second locking member that operates by a pulling external force.

Description

Technology Field

[0001] The present invention relates to a stent delivery system for placing a stent in adjacent tissue layers, and in particular to a stent delivery system for placing a stent in two adjacent lumens within the body to secure a passage for endoscopy or shunt surgery, abscess drainage, etc. Background Technology

[0002] When performing 'transluminal' procedures with stents loaded into a standard stent delivery system, there was a high probability of leakage of food and digestive fluids due to repeated device exchanges, and the resulting complications.

[0003] Therefore, a stent delivery system capable of performing electrocautery to enable a one-step procedure without exchanging the above-mentioned devices is being used, and Patent Document 1 also provided a device similar to the above-mentioned stent delivery system.

[0004] As shown in Fig. 1, Patent Document 1 achieved simplification of the procedure by implementing electrocautery performance through the tip (32), but there was a problem that it was difficult to operate to place the stent in an adjacent tissue layer.

[0005] Specifically, in order to move the tip (32) in the adjacent tissue layer, the locking device (20) had to be operated to lock or unlock, and in order to deploy the stent in the adjacent tissue layer, the locking device (22) had to be operated to lock or unlock.

[0006] In other words, in the case of the above patent document 1, there was a difficulty in having to operate the locking device (20) and the locking device (22) to lock or unlock, respectively.

[0007] For this reason, due to the difficulty of manipulation in the adjacent tissue layer, an accident involving electrocautery through the tip (32) and an accident involving stent deployment, i.e., a medical accident, could occur.

[0008] Currently, there is a demand for a stent delivery system that improves upon the aforementioned problems. Prior art literature

[0009] Patent Document 1: U.S. Registered Patent No. 11766264 (September 26, 2023) The problem to be solved

[0010] Accordingly, the present invention aims to provide an easy-to-operate stent delivery system that allows for easy movement or fixation of an electrocautery tip in adjacent tissue layers, that is, two adjacent lumens within the body, and easy deployment of a stent to connect the openings of the two adjacent lumens formed by the electrocautery tip. means of solving the problem

[0011] To achieve the above-mentioned objective, the present invention comprises: a fixing tube having a first passage formed inside and a plurality of first locking grooves formed along the longitudinal direction on the outer surface; a first handle having a second passage formed inside to allow a part of the fixing tube to be inserted so as to move forward and backward on the outer surface of the fixing tube, a button hole connected to the second passage formed on the outer surface, a guide rod protruding from the outer surface opposite the fixing tube, a third passage connected to the second passage formed inside the guide rod, first and second guide holes connected to the third passage formed longitudinally on both sides of the outer surface of the guide rod, a fixing part formed at the rear end of the third passage, a plug mounted on the guide rod around the fixing part, and first and second locking protrusions formed at both ends of the second guide holes adjacent to the second passage and the fixing part, respectively. A first locking member comprising: a seesaw member rotatably mounted in a second passage, with a third locking projection and a pressure portion formed on each side and a hinge portion formed in the middle; a spring that presses the third locking projection to engage with a first locking groove; and a button mounted to move up and down in a button hole, which disengages the third locking projection from the first locking groove when the pressure portion is pressed; a second locking member comprising: a second handle mounted to move forward and backward on the outer surface of a guide rod; a first and second guide portions formed on the outer surface of the second guide portion that penetrate the first and second guide holes respectively and are fixed to the second handle, and second and third locking grooves formed on the outer surface of the second guide portion, into which the first and second locking projections respectively engage when moving forward or backward by the second handle; and an outer tube having one end fixed to the movable member and the opposite end protruding from the fixed tube. and, an internal tube member inserted into the interior of an external tube, with one end fixed to a fixing part, and on the opposite end, an electrocautery tip that cauterizes two adjacent lumens inside the body to form a hole is mounted so as to be caught on the external tube, and on the opposite end, a mounting space formed adjacent to the electrocautery tip for a stent that connects a pair of holes to be compressed and mounted on the external tube, and a wire connected to a plug is inserted inside and connected to the electrocautery tip;A stent delivery system comprising Effects of the invention

[0012] The present invention has the effect of unlocking the first locking member because the third locking projection disengages from the first locking groove when the button is pressed.

[0013] In other words, it has the effect of allowing the first handle that moves the electrocautery tip to move within the fixed tube.

[0014] And, when the pressure on the button is released, the third locking projection is engaged with the first locking groove by the spring, so the first locking member is locked.

[0015] In other words, it has the effect of preventing the first handle that moves the electrocautery tip from moving within the fixed tube.

[0016] In other words, the first handle that moves the electrocautery tip has the effect of moving or being fixed in the fixed tube by the first locking member that operates semi-automatically.

[0017] For this reason, the present invention is easy to operate and has the effect of easily moving or fixing the electrocautery tip in adjacent tissue layers, that is, two adjacent lumens in the body.

[0018] In addition, due to the difficulty of operation, it is effective in preventing electrocautery errors—that is, medical accidents—cautery using the electrocautery tip.

[0019] The present invention has the effect of unlocking the second locking member because when the second handle is pulled, the second locking groove disengages from the first locking projection.

[0020] In other words, the second handle, which moves the outer tube for stent deployment, has the effect of being able to move from the guide rod of the first handle.

[0021] And, when the second handle is continuously pulled to retract, the third locking groove engages with the second locking projection, thereby locking the second locking member.

[0022] In other words, after the stent deployment is complete, the second handle that moves the external tube has the effect of becoming unable to move from the guide rod of the first handle.

[0023] In other words, the second handle, which moves the outer tube for stent deployment, has the effect of moving or being fixed from the guide rod of the first handle by a second locking member that is actuated by a pulling external force.

[0024] For this reason, the present invention is easy to operate and has the effect of easily performing the deployment of a stent to connect two adjacent lumen holes formed by an electrocautery tip.

[0025] In addition, due to the difficulty of manipulation, it has the effect of preventing stent deployment errors, i.e., medical accidents.

[0026] In this invention, the second and third locking grooves are guided on the rounded guide surfaces of the first and second locking projections so that they can be easily inserted into or removed from the first and second locking projections, thereby providing the effect of easily releasing or fixing the second handle from the guide rod of the first handle.

[0027] For this reason, the present invention has the effect of easily unlocking or locking the second locking member.

[0028] The present invention has the effect of stably guiding the rotation of the seesaw member in the holder when the button is pressed or released.

[0029] In other words, the holder has the effect of preventing the seesaw member from shaking due to the external force applying the button or the elasticity of the restoring spring.

[0030] In addition, since the first guide projection of the button is guided in the first guide groove of the insertion hole, it has the effect of preventing the button from shaking in the insertion hole and the button hole due to an external force pressing the button or the elasticity of the restoring spring.

[0031] For this reason, the present invention has the effect of stably unlocking or locking the first locking member.

[0032] The present invention has the effect of pressing an outer tube fitted into a fixing hole of a movable member as the male screw part is fastened to the female screw part.

[0033] In addition, a locking part expanded beyond the diameter of the outer tube is fitted into the locking hole of the movable member, creating a locking effect.

[0034] In addition, the outer tube is bonded to the fixing hole of the movable member by adhesive, thereby having the effect of being fixed.

[0035] In other words, the outer tube has the effect of being fixed to the movable member.

[0036] For this reason, the present invention has the effect of preventing the outer tube from detaching from the moving member while allowing the outer tube to move smoothly by the second handle.

[0037] The present invention has the effect of causing only a part of the stent, specifically one flange portion, to unfold as it engages with the locking pin when the second handle is retracted.

[0038] For this reason, the present invention has the effect of holding the second handle with a locking pin so that it does not retract along the guide rod until the stent is moved and one flange portion is caught around one hole, and also has the effect of preventing the stent from unfolding at a location away from the procedure site.

[0039] The present invention has the effect of guiding the second guide projection of the first handle into the second guide groove of the fixed tube and moving.

[0040] In other words, when the first handle is moved, the first handle that moves the electrocautery tip has the effect of not shaking in the fixed tube.

[0041] For this reason, the present invention has the effect of preventing the shaking of the electrocautery tip, thereby preventing the formation of holes in areas that are not to be cauterized. Brief explanation of the drawing

[0042] FIG. 1 is a perspective view showing a conventional stent delivery system, FIG. 2 is a perspective view of a stent delivery system according to an embodiment of the present invention. FIGS. 3 to 5 are the top view, side view, and bottom view of FIG. 2, FIG. 6 is a perspective view of FIG. 2 with parts of the first and second handles removed. FIG. 7 is an exploded perspective view of a stent delivery system according to an embodiment of the present invention. FIG. 8 is a cross-sectional view of FIG. 2, FIGS. 9 to 13 are partial enlarged views of FIG. 8, FIGS. 14 to 22 are detailed diagrams of the configuration of a stent delivery system according to an embodiment of the present invention. FIGS. 23 to 41 are diagrams of the usage state of a stent delivery system according to an embodiment of the present invention. Specific details for implementing the invention

[0043] Accordingly, an embodiment of the present invention as described above will be explained in detail with reference to the attached drawings as follows.

[0044] As illustrated in FIGS. 2 to 41, the stent delivery system (1000) according to an embodiment of the present invention is mainly used when implanting a stent (620) so that the digestive enzymes of the liver and pancreas or the abscess caused by the lesion site are moved upward when a lesion site that is stenotic or obstructed occurs in the bile duct, and the bile duct and adjacent tissue layers such as the stomach are connected, i.e., two adjacent lumens (1) in the body.

[0045] The above stent delivery system (1000) includes a fixed tube (100), a first handle (200), a first locking member (300), a second locking member (400), an outer tube (500), an inner tube member (600), and a locking pin (700).

[0046] The above fixed tube (100) has a first passage (110) formed inside and a plurality of first locking grooves (120) formed along the length direction on the outer surface.

[0047] Here, on the outer surface of the fixed tube (100), a second guide groove (130) is formed lengthwise opposite to the first catch groove (120).

[0048] And, the front of the fixed tube (100) is connected to the connecting part (3a) of the endoscope (3) through the connecting member (2).

[0049] The first handle (200) has a second passage (210) formed inside, into which a part of the fixed tube (100) is inserted so that it can move forward and backward on the outer surface of the fixed tube (100), a button hole (220) connected to the second passage (210) is formed on the outer surface, and a guide rod (230) is formed protruding from the outer surface on the opposite side of the fixed tube (100).

[0050] Here, a second guide projection (240) that is guided to the second guide groove (130) is formed protruding from the front end of the second passage (210), a guide rod (230) is formed protruding from the rear of the first handle (200), and the first handle (200) is composed of upper and lower bodies that are coupled to each other.

[0051] A third passage (231) connected to a second passage (210) is formed inside the guide rod (230), and first and second guide holes (232) (233), each connected to the third passage (231), are formed longitudinally on both sides of the outer surface of the guide rod (230). A fixing part (234) is formed at the rear end of the third passage (231), and a plug (235) is mounted on the guide rod (230) around the fixing part (234). First and second locking protrusions (233a) (233b) are formed protrudingly at both ends of the second guide hole (233), which is adjacent to the second passage (210) and the fixing part (234), respectively.

[0052] Here, a cover portion (236) is formed protruding from the outer surface of the guide rod (230) to cover the plug (235) so that the plug (235) is positioned inside, and the plug (235) is connected to the connector (4b) of the cable (4a) and connected to the high-frequency generator (4).

[0053] And, a round guide surface (233a') is formed on the outer surface of the first locking projection (233a), and a round guide surface (233b') is formed on the outer surface of the second locking projection (233b).

[0054] And, a fitting groove (232a) is formed in the middle part of the first guide hole (232), and a fixing hole (234a) is formed in the fixing part (234).

[0055] The first locking member (300) includes a seesaw member (310) which is rotatably mounted in the second passage (210) with a third locking projection (311) and a pressure part (312) protruding on each side and a hinge part (313) protruding in the middle part, a spring (320) which presses the third locking projection (311) to be inserted into and locked in the first locking groove (120), and a button (330) which is mounted to be raised and lowered in the button hole (220) and releases the third locking projection (311) from the first locking groove (120) when the pressure part (312) is pressed.

[0056] The first locking member (300) is mounted in the second passage (210), and a rotating groove (341) into which a hinge part (313) is rotatably fitted is formed in the middle part, a first through hole (342) that penetrates a third locking projection (311) that is pressed by a spring (320) is formed on one side, and a protrusion (343) that is protruded on the opposite side is provided with an insertion hole (343a) into which a button (330) that presses the pressing part (312) is inserted is provided.

[0057] Here, the seesaw member (310) is rotatably mounted in the second passage (210) by means of a holder (340), and the seesaw member (310) and the holder (340) are positioned above the fixed tube (100).

[0058] Additionally, a first guide groove (343b) is formed on each side of the insertion hole (343a), and a first guide projection (331) that is guided into the first guide groove (343b) is formed protrudingly on each side of the outer surface of the button (330).

[0059] The second locking member (400) comprises a second handle (410) mounted on the outer surface of the guide rod (230) to allow forward and backward movement, and a moving member (420) having first and second guide parts (421) (422) formed on the outer surface that are inserted into the third passage (231) and fixed to the second handle (410) by penetrating the first and second guide holes (232) (233) respectively, and having second and third locking grooves (422a) (422b) formed on the outer surface of the second guide part (422) such that when moving forward or backward by the second handle (410), the first and second locking protrusions (233a) (233b) are respectively fitted and locked.

[0060] Here, the second and third locking grooves (422a) and (422b) are formed on one side of the second guide part (422) and are formed roundly, corresponding to the rounded guide surfaces (233a') and (233b') of the first and second locking projections (233a) and (233b), respectively.

[0061] And, the second handle (410) is composed of upper and lower bodies that are mutually coupled, and fitting grooves (411) are formed on the upper and lower parts of the inside, respectively. The first and second guide parts (421) (422) are each formed to protrude from the outer surface of the moving member (420) so as to be guided into the first and second guide holes (232) (233), respectively. On the surfaces of the first and second guide parts (421) (422) facing the pair of fitting grooves (411), fitting projections (421a) (422c) that are fitted into the pair of fitting grooves (411) are each formed to protrude.

[0062] One end of the outer tube (500) is fixed to the movable member (420), while the other end protrudes from the fixed tube (100).

[0063] Here, the outer tube (500) is inserted into the inside of the connecting part (3a) of the endoscope (3) and into the inside of the tube (3b) of the endoscope (3) connected to the connecting part (3a).

[0064] The above inner tube member (600) is inserted into the interior of the outer tube (500) and one end is fixed to the fixing part (234). On the opposite end, an electrocautery tip (610) that cauterizes two adjacent lumens (1) inside the body to form a hole (1a) is mounted so as to be caught at the entrance of the outer tube (500). On the opposite end, a mounting space (630) in which a stent (620) that connects a pair of holes (1a) is compressed and mounted on the outer tube (500) is formed adjacent to the electrocautery tip (610) at the rear of the electrocautery tip (610), and a wire (235a) connected to the plug (235) is inserted into the interior and connected to the electrocautery tip (610).

[0065] Here, the inner tube member (600) is fixed by being fitted into the fixing hole (234a) of the fixing part (234), and a part of the plug (235) is inserted inside, and is made of an insulating material.

[0066] And, the above-mentioned electrocautery tip (610) is provided with an insulating member, and on both sides of the stent (620), a pair of flange portions (621) are formed, each of which is engaged around a pair of holes (1a).

[0067] Also, a guide wire that guides to two adjacent cavities (1) inside the body may be inserted into the interior of the internal tube member (600).

[0068] A fixing hole (423) into which an outer tube (500) is fitted is formed through the outer surface of the above-mentioned moving member (420).

[0069] Here, the outer tube (500) is bonded to the fixing hole (423) by an adhesive (520), such as a bond.

[0070] A female screw portion (423a) is formed at the rear end of the above-mentioned fixing hole (423), and the second locking member (400) has a male screw portion (431) formed on its outer surface that is fastened to the female screw portion (423a), and a second through hole (432) formed in the center that penetrates the internal tube member (600), and further includes a fixing member (430) that presses the outer tube (500) when the male screw portion (431) is fastened to the female screw portion (423a).

[0071] Here, the inner tube member (600) includes a fixed tube (600a) which is inserted into the interior of the outer tube (500) by passing through the second through hole (432) of the fixed member (430) and the fixed hole (423) of the movable member (420) while one end of the inner tube member (600) is fixed to the fixed member (234), and the other end is inserted into the interior of the outer tube (500); and an inner tube (600b) which is inserted into the interior of the outer tube (500) and has one end connected to the front of the fixed tube (600a), with an electrocautery tip (610) mounted on the opposite end, and a mounting space (630) formed adjacent to the electrocautery tip (610) at the rear of the electrocautery tip (610) so that a stent (620) is compressed and mounted on the outer tube (500) on the opposite end.

[0072] A portion of the fixing hole (423) adjacent to the above female screw portion (423a) is formed such that the diameter is larger than that of the fixing hole (423) as it gets closer to the fixing member (430), thereby forming a catch hole (423b).

[0073] A portion of the outer tube (500) adjacent to the female screw portion (423a) is formed such that the diameter is larger than that of the outer tube (500) as it gets closer to the fixing member (430), thereby forming a catch portion (510) that is fitted into and caught in the catch hole (423b).

[0074] The above stent delivery system (1000) further includes a locking pin (700) that is fitted into a fitting groove (232a) and engages the second handle (410) when the second handle (410) is retracted.

[0075] As illustrated in FIGS. 2 to 41, the operation and effect of the stent delivery system (1000) according to the embodiment of the present invention configured as described above are as follows.

[0076] With the tube (3b) of the endoscope (3) inserted so as to be positioned in two adjacent lumens (1) inside the body, a stent delivery system (1000) is positioned around the endoscope (3).

[0077] As shown in FIGS. 23 and 24, after mounting a connecting member (2) on the front of the fixed tube (100), the external tube (500) is inserted into the connecting part (3a) and tube (3b) of the endoscope (3), and the fixed tube (100) is connected to the connecting part (3a) of the endoscope (3) through the connecting member (2).

[0078] For this reason, the stent delivery system (1000) is combined with an endoscope (3).

[0079] As shown in FIG. 25, the plug (235) is connected to the connector (4b) of the cable (4a) and connected to the high-frequency generator (4), and the electrocautery tip (610) generates high-frequency heat by receiving current from the high-frequency generator (4) through the wire (235a).

[0080] As shown in FIGS. 26 and 27, the lock of the first locking member (300) is released so that the first handle (200) can move on the outer surface of the fixed tube (100).

[0081] To explain further, while the user is holding the first handle (200) with their hand, the button (330) is pressed with the user's finger to press the pressing part (312) with the button (330).

[0082] Then, as the seesaw member (310) rotates around the hinge part (313), the third locking projection (311) is disengaged from the first locking groove (120).

[0083] Here, the button (330) is inserted into the insertion hole (343a) of the protrusion (343) as the first guide projection (331) is guided into the first guide groove (343b), and the spring (320) is compressed on one side of the seesaw member (310) on which the third locking projection (311) is formed.

[0084] For this reason, the first handle (200) becomes free from the fixed tube (100) due to the unlocking of the first locking member (300).

[0085] As shown in FIG. 28, the first handle (200) is advanced along the outer surface of the fixed tube (100).

[0086] Here, the second guide projection (240) of the first handle (200) is guided into the second guide groove (130) of the fixed tube (100).

[0087] Then, the second handle (410) is fitted into the first locking projection (233a) in the second locking groove (422a) of the moving member (420) and is fixed to the guide rod (230) of the first handle (200), so it moves forward together with the first handle (200).

[0088] And, the outer tube (500) is also fixed to the fixing hole (423) by adhesive (520), and the catch portion (510) is inserted into the catch hole (423b) and caught, and is pressed against the fixing member (430) and fixed to the moving member (420), so it moves forward together with the second handle (410).

[0089] And, since the inner tube member (600) is also fixed to the fixing part (234) of the guide rod (230), it moves forward together with the first handle (200).

[0090] As illustrated in FIG. 29, the electrocautery tip (610) advances together with the first handle (200) to cauterize two adjacent lumens (1) inside the body to form a hole (1a).

[0091] That is, the two adjacent cavities (1) are burned and penetrated by high-frequency heat generated from the electrocautery tip (610), and holes (1a) are formed in each.

[0092] As shown in FIGS. 30 and 31, after the hole (1a) is formed, the first locking member (300) is locked so that the first handle (200) cannot move on the outer surface of the fixed tube (100).

[0093] To explain further, the pressure of the button (330) on the above-mentioned pressure part (312) is released.

[0094] Then, the spring (320) is restored from a compressed state to its original state, causing the seesaw member (310) to rotate around the hinge part (313), and the third locking projection (311) is pressed against the spring (320) and is fitted into the first locking groove (120) and locked.

[0095] Here, the button (330) protrudes from the insertion hole (343a) and the button hole (220) of the protrusion (343) as the first guide projection (331) is guided into the first guide groove (343b).

[0096] For this reason, the first handle (200) is fixed to the fixed tube (100) by locking the first locking member (300).

[0097] Then, disconnect the connection between the plug (235) and the connector (4b) of the cable (4a), or stop the operation of the high-frequency generator (4).

[0098] Then, high-frequency heat is not generated in the above-mentioned electrocautery tip (610).

[0099] As shown in FIGS. 32 and 33, the lock of the second locking member (400) is released so that the second handle (410) can move on the outer surface of the guide rod (230).

[0100] To explain further, the second handle (410) is pulled by the user's hand to move it backward along the outer surface of the guide rod (230), thereby disengaging the second locking groove (422a) of the moving member (420) from the first locking projection (233a).

[0101] Here, the second locking groove (422a) of the moving member (420) is guided by the round guide surface (233a') of the first locking projection (233a) and easily disengaged.

[0102] For this reason, the second locking member (400) is unlocked by an external force pulling the second handle (410), and the second handle (410) becomes free from the guide rod (230) due to the unlocking of the second locking member (400).

[0103] As illustrated in FIGS. 34 and 35, the moving member (420) moves backward together with the second handle (410) as the first and second guide parts (421) (422) are guided into the first and second guide holes (232) (233) of the guide rod (230), respectively.

[0104] Then, the outer tube (500) fixed to the moving member (420) moves backward together with the second handle (410), and the stent (620) that was compressed in the mounting space (630) of the inner tube member (600) by the outer tube (500) is partially unfolded (expanded) to return to its original state by the backward movement of the outer tube (500).

[0105] At this time, the second handle (410) is caught on the locking pin (700) and the reversing is stopped, and the stent (620) is deployed (expanded) with only one of the pair of flange portions (621) detached from the mounting space (630).

[0106] As illustrated in FIGS. 36 and 37, the user presses the button (330) to unlock the first locking member (300) in the manner described above, and then, while holding the second handle (410) with one hand and fixing it to the guide rod (230), pulls the first handle (200) with the other hand to move it backward along the outer surface of the fixing tube (100).

[0107] Then, the inner tube member (600) and the outer tube (500), each fixed to the first and second handles (200) (410), move backward along a pair of holes (1a), and the stent (620), which was partially compressed in the mounting space (630) of the inner tube member (600) by the outer tube (500), also moves backward.

[0108] Here, the flange portion (621) of the stent (620) that has been removed from the mounting space (630) moves toward the hole (1a).

[0109] Then, when the flange portion (621) catches around the hole (1a), the user releases the button (330) to lock the first locking member (300) in the same way as above and takes their hand off the second handle (410).

[0110] As shown in FIGS. 38 and 39, after the locking pin (700) is removed from the insertion groove (232a), the second handle (410) is pulled by the user's hand to move the second handle (410) backward along the outer surface of the guide rod (230).

[0111] Then, the third locking groove (422b) of the moving member (420) is fitted into and caught on the second locking projection (233b), and the second handle (410) is prevented from moving on the outer surface of the guide rod (230).

[0112] Here, the third locking groove (422b) of the moving member (420) is guided by the round guide surface (233b') of the second locking projection (233b) and is easily fitted into and locked by the second locking projection (233b).

[0113] For this reason, the second locking member (400) is locked by an external force pulling the second handle (410), and the second handle (410) is fixed to the guide rod (230).

[0114] As shown in FIGS. 40 and 41, the stent (600) is fully unfolded (expanded) back to its original state and completely detached from the mounting space (630) of the internal tubular member (600), and a pair of flange portions (621) are each caught around a pair of holes (1a).

[0115] For this reason, the stent (600) connects two adjacent lumen (1) holes (1a) in the body.

[0116] When the procedure of the above stent (600) is completed, the stent delivery system (1000) of the present invention is separated from the endoscope (3) and the outer tube (500) and inner tube member (600) are removed from the body.

[0117] Although the present invention has been illustrated and described with reference to specific preferred embodiments, the present invention is not limited to the embodiments described above, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention. Explanation of the symbols

[0118] 100 : Fixed tube 110 : First passage 120 : 1st locking groove 130 : 2nd guide groove 200 : 1st handle 210 : 2nd passage 220: Button hole 230: Guide rod 231: Third passage 232: First guide hole 232a : Insertion groove 233 : Second guide hole 233a : First locking projection 233a' : Guide surface 233b : Second locking projection 233b' : Guide surface 234 : Fixed part 235 : Plug 235a : Wire 240 : Second guide projection 300 : First locking member 310 : Seesaw member 311: Third locking projection 312: Pressure part 313 : Hinge part 320 : Spring 330 : Button 331 : First guide projection 340 : Holder 341 : Rotating groove 342: First penetration hole 343: Protrusion 343a: Insertion hole 343b: First guide groove 400 : Second locking member 410 : Second handle 420: Moving member 421: First guide part 422 : Second guide part 422a : Second locking groove 422b : Third locking groove 423 : Fixing hole 423a : Female thread 423b : Locking hole 430 : Fixing member 431 : Male threaded part 432 : Second penetration hole 500 : Outer tube 510 : Locking part 520 : Adhesive 600 : Internal pipe member 610 : Electric cauterization tip 620 : Stent 630 : Mounting space 700 : Locking pin 1000 : Stent delivery system

Claims

Claim 1 A fixed tube (100) having a first passage (110) formed inside and a plurality of first locking grooves (120) formed along the length direction on the outer surface; a second passage (210) into which a part of the fixed tube (100) is inserted so as to move forward and backward on the outer surface of the fixed tube (100) is formed inside, and a button hole (220) connected to the second passage (210) is formed on the outer surface, and a guide rod (230) protruding from the outer surface on the opposite side of the fixed tube (100), wherein a third passage (231) connected to the second passage (210) is formed inside the guide rod (230), and first and second guide holes (232) (233) connected to the third passage (231) are formed long in the length direction on both sides of the outer surface of the guide rod (230), and a fixing part (234) is formed at the rear end of the third passage (231). A first handle (200) having a plug (235) mounted on a guide rod (230) around a fixed part (234), and first and second locking protrusions (233a) and (233b) formed at each end of a second guide hole (233) adjacent to the second passage (210) and the fixed part (234); a seesaw member (310) having a third locking protrusion (311) and a pressure part (312) formed on each side and a hinge part (313) formed in the middle part, which is rotatably mounted in the second passage (210); a spring (320) that presses the third locking protrusion (311) to be inserted into and caught in the first locking groove (120); and a button hole (220) that is mounted to be raised and lowered, and when the pressure part (312) is pressed, the third locking protrusion (311) A first locking member (300) including a button (330) for disengaging from a first locking groove (120);A second locking member (400) comprising a second handle (410) mounted on the outer surface of the guide rod (230) to allow forward and backward movement, and a moving member (420) having first and second guide parts (421) (422) formed on the outer surface that are inserted into the third passage (231) and are fixed to the second handle (410) by penetrating the first and second guide holes (232) (233) respectively, and second and third locking grooves (422a) (422b) formed on the outer surface of the second guide part (422) such that when moving forward or backward by the second handle (410), the first and second locking projections (233a) (233b) are respectively fitted and locked in; and an outer tube (500) having one end fixed to the moving member (420) and the opposite end protruding from the fixed tube (100). A stent delivery system comprising: an internal tube member (600) inserted into the interior of the outer tube (500), with one end fixed to a fixing part (234), and an electrocautery tip (610) that cauterizes two adjacent lumens (1) inside the body to form holes (1a) is mounted on the opposite end of the outer tube (500) so as to be caught thereon, and a mounting space (630) formed adjacent to the electrocautery tip (610) on the opposite end, in which a stent (620) that connects a pair of holes (1a) is compressed and mounted on the outer tube (500), and a wire (235a) connected to the plug (235) is inserted inside and connected to the electrocautery tip (610); Claim 2 A stent delivery system characterized in that, in claim 1, a round guide surface (233a') is formed on the outer surface of the first locking projection (233a), and a round guide surface (233b') is formed on the outer surface of the second locking projection (233b). Claim 3 A stent delivery system according to claim 1, further comprising a holder (340) in which the first locking member (300) is mounted in the second passage (210), a rotation groove (341) into which a hinge part (313) is rotatably fitted is formed in the middle part, a first through hole (342) is formed on one side that penetrates a third locking projection (311) that is pressed by a spring (320), and a protrusion (343) is formed on the opposite side that has an insertion hole (343a) into which a button (330) that presses the pressing part (312) is inserted. Claim 4 A stent delivery system characterized in that, in paragraph 3, a first guide groove (343b) is formed in the insertion hole (343a), and a first guide projection (331) that is guided to the first guide groove (343b) is formed on the outer surface of the button (330). Claim 5 A stent delivery system characterized in that, in the first paragraph, a fixing hole (423) into which an outer tube (500) is fitted is formed through the outer surface of the moving member (420), a female screw portion (423a) is formed at the rear end of the fixing hole (423), and the second locking member (400) has a male screw portion (431) formed on its outer surface that is fastened to the female screw portion (423a), and a second through hole (432) that penetrates the inner tube member (600) is formed in the center, and further includes a fixing member (430) that presses the outer tube (500) when the male screw portion (431) is fastened to the female screw portion (423a). Claim 6 A stent delivery system characterized in that, in claim 5, a portion of the fixing hole (423) adjacent to the female screw portion (423a) is formed such that the diameter is larger than that of the fixing hole (423) as it gets closer to the fixing member (430), thereby forming a catch hole (423b), and a portion of the outer tube (500) adjacent to the female screw portion (423a) is formed such that the diameter is larger than that of the outer tube (500) as it gets closer to the fixing member (430), thereby forming a catch portion (510) that is fitted into and caught in the catch hole (423b). Claim 7 A stent delivery system according to claim 5, wherein the outer tube (500) is bonded to the fixing hole (423) by an adhesive (520). Claim 8 A stent delivery system according to claim 1, wherein a fitting groove (232a) is formed in the first guide hole (232), and further comprising a locking pin (700) that is fitted into the fitting groove (232a) and engages the second handle (410) when the second handle (410) is retracted. Claim 9 A stent delivery system according to claim 1, characterized in that a second guide groove (130) is formed longitudinally on the outer surface of the fixed tube (100) opposite to the first catch groove (120), and a second guide projection (240) that is guided to the second guide groove (130) is formed in the second passage (210).

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