Stent delivery devices

Abstract

A stent delivery device is disclosed. The stent delivery device comprises: a shell having a central hole formed in a length direction; a main body coupled to one side of the shell and having a predetermined length; and a handle penetrating and coupled to the main body in a manner that the handle can slide along the length direction of the main body, wherein a stopper for limiting the sliding movement of the handle is formed in a part of the outer peripheral surface of the main body, and when the handle rotates at a predetermined angle along the peripheral direction of the outer peripheral surface, the movement restriction caused by the stopper is released so that the handle can slide.

Description

Technical Field

[0001] The present disclosure relates to a stent delivery device. Background Art

[0002] Generally, a stent is a medical device that is inserted into a specific part of the human body and expands a narrow catheter to its original size and maintains it. In order to insert a stent into the body, a method of placing a catheter with a stent installed inside the catheter into the body and discharging the stent to the outside of the catheter to install the stent at a specific part of the body is widely used. In this regard, a technology related to a medical catheter capable of installing a stent is proposed in Korean Utility Model Gazette No. 20-0484392.

[0003] Pancreatic pseudocyst is an inflammatory cystic lesion that occurs when the pancreatic duct is blocked and ruptured due to pancreatitis, pancreatic trauma or surgery, causing pancreatic fluid to leak out. As the pseudocyst grows, it will exert pressure on the stomach or adjacent organs, so it is a disease that requires urgent treatment.

[0004] In order to treat such pseudocysts, treatment is being used in which the pseudocyst is perforated and a stent is placed at the perforation site to discharge the contents of the pseudocyst. However, since existing catheters for stent placement are not suitable for perforating a pseudocyst and placing a stent at the perforation site, it is necessary to develop technology that allows easy perforation and stent placement when treating pseudocysts. Summary of the invention

[0005] Technical issues

[0006] The technical concept disclosed in the present invention is used to solve the above-mentioned problems, and aims to provide a technology that is easy to perforate a pseudocyst and set a stent at the perforation site when treating a pseudocyst.

[0007] The problems to be solved by the present invention are not limited to the aforementioned problems, and a person having ordinary knowledge in the field to which the present invention belongs can clearly understand other technical problems not mentioned from the following contents.

[0008] Technical Solution

[0009] To achieve these objectives, as one embodiment of the present invention, a stent delivery device includes: a shell having a central hole formed in a length direction; a main body coupled to one side of the shell and having a predetermined length; and a handle penetrating and coupled to the main body in a manner that allows sliding movement along the length direction of the main body, wherein a stopper that limits the sliding movement of the handle is formed in a portion of an outer peripheral surface of the main body, and when the handle is rotated at a predetermined angle in a peripheral direction of the outer peripheral surface, the movement restriction caused by the stopper is released so that the handle can slide.

[0010] In addition, the stent delivery device may further include: a first tube, which passes through and is combined with the interior of the handle portion; and a shaft, in which a first tube movement channel is formed to enable the first tube to move, wherein a plurality of protruding components are formed on the outer circumferential surface of the shaft at predetermined intervals, wherein the shell includes: a shell advance and retreat component, which is selectively inserted into the spaced spaces formed by the plurality of protruding components to adjust the advance and retreat of the shell.

[0011] In addition, the stent delivery device further includes: a head portion coupled to one side of the main body portion and having electrodes arranged therein; a second tube penetrating and coupled to the first tube and having one end coupled to the head portion; a third tube having a diameter smaller than that of the second tube and having one end coupled to the head portion; and a front end portion coupled to the other end of the third tube and formed of an insulating material, wherein a conductive component may be coupled to an outer peripheral surface of the front end portion to transmit current applied to the electrode.

[0012] Furthermore, the handle portion includes: a first tube fixing component, which surrounds and is combined with at least a portion of the outer circumferential surface of the first tube, wherein the first tube fixing component has a fixing portion and a leg portion, the fixing portion surrounds and fixes the first tube, and the leg portion is formed by extending from the fixing portion, and a plurality of clamping platforms that can clamp both ends of the leg portion can be formed inside the handle portion, so that the first tube fixing component moves together when the handle portion slides.

[0013] Furthermore, a guide hole is formed on the outer peripheral surface of the main body along the length direction of the main body, and when the handle part slides, the leg part can move along the guide hole.

[0014] Furthermore, the stopper includes: a first stopper, which is formed along the peripheral direction of the outer peripheral surface of the main body and is formed to protrude from a partial area of ​​the outer peripheral surface of the main body; and a second stopper, which is separated from the first stopper in the length direction of the main body and is formed to protrude from a partial area of ​​the outer peripheral surface of the main body, wherein, based on the periphery of the outer peripheral surface of the main body, the first stopper protrudes along a part of the periphery of the outer peripheral surface of the main body, and the second stopper protrudes along another part of the periphery of the outer peripheral surface of the main body, and a movement limiting component that can be caught by the first stopper or the second stopper when the handle part slides and moves can be formed inside the handle part.

[0015] The solutions to the above problems are merely exemplary and should not be interpreted as limiting the intention of the present invention. In addition to the above exemplary embodiments, there may be additional embodiments described in the drawings and detailed description of the present invention.

[0016] Technical Effects

[0017] As described above, according to various embodiments of the present invention, since the current applied to the electrode is transmitted to the conductive member, the front end portion easily penetrates and enters the tissue, that is, it is easy to perforate the stomach wall or pancreatic wall.

[0018] Furthermore, when the stent is deployed at the perforation site, the movement restriction caused by the first stopper is released by rotating the handle portion, thereby enabling the first deployment of the stent, and if the handle portion is rotated again after the first deployment of the stent, the movement restriction caused by the second stopper is released, thereby enabling the second deployment of the stent.

[0019] Specifically, when a predetermined force is applied to the pressure groove formed on the outer peripheral surface of the handle, the handle can be rotated with the main body as the axis, and the movement restriction caused by the first stopper is released. If the handle is moved to a position between the first stopper and the second stopper, the first deployment of the bracket can be achieved. And, when the handle reaches between the first stopper and the second stopper, the handle is rotated again to release the movement restriction caused by the second stopper, and the handle is moved to the head to achieve the second deployment of the bracket. In this process, since the user can easily release the movement restriction caused by the stopper by rotating the handle only with the force of the thumb, it has the advantage of being easy to operate.

[0020] Furthermore, according to various embodiments of the present invention, when the bracket is deployed for the first time and the second time, the movement restriction caused by each stopper can be easily released by rotating the handle portion. Therefore, compared with the method of separating the safety device for preventing secondary deployment after the first deployment of the bracket and deploying the bracket for the second time, it is easier to set up the bracket, and the bracket can be safely deployed even without additionally providing a safety device to prevent sudden deployment.

[0021] The effects of various embodiments of the present invention are not limited to the above-mentioned effects, and a person skilled in the art can clearly understand other effects not mentioned through the description of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. 4 is a perspective view schematically showing a stent delivery device according to an embodiment of the present invention.

[0023] Figure 2 FIG. 4 is an exploded perspective view schematically showing a stent delivery device according to an embodiment of the present invention.

[0024] Figure 3FIG. 1 is a partial cross-sectional perspective view schematically showing the interior of a handle portion according to an embodiment of the present invention.

[0025] Figure 4 The figure schematically shows a state in which the front end portion of the stent delivery device according to an embodiment of the present invention contacts the stomach wall.

[0026] Figure 5 The diagram schematically shows a state in which a stent is deployed for the first time after the stomach wall and the pseudocyst are perforated by the stent delivery device according to an embodiment of the present invention.

[0027] Figure 6 The diagram schematically shows a state in which a stent that is first deployed by a stent delivery device according to an embodiment of the present invention is closely attached to the inner wall of a pseudocyst.

[0028] Figure 7 The figure schematically shows a state where a stent delivery device according to an embodiment of the present invention deploys a stent for the second time.

[0029] [Explanation of Reference Numerals]

[0030] 10: Stent delivery device 100: Housing

[0031] 110: Shell advance and retreat component 111: First hole

[0032] 112: Second hole 120: Connecting pipe

[0033] 200: Main body 210: Stopper

[0034] 211: first stopper 212: second stopper

[0035] 220: guide hole 300: handle

[0036] 310: First pipe fixing member 311: Fixing portion

[0037] 312: Leg part 320: First clamping platform

[0038] 330: second clamping platform 340: movement limiting component

[0039] 350, 360: pressure groove 400: first tube

[0040] 500: shaft 510: first tube moving channel

[0041] 520, 530: protruding parts 540: space between

[0042] 550: shaft fixing part 600: head

[0043] 610: Electrode 700: Second tube

[0044] 800: Third tube 900: Front end

[0045] 910: Conductive component 920: Through hole

[0046] 20: Stomach wall 30: Guide wire

[0047] 40: Power supply 50: Bracket

[0048] 60: Pseudocyst DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. For the sake of brevity of the description, some well-known technical parts will be omitted or simplified.

[0050] It should be noted that, in this specification, reference to “an” or “an” embodiment of the present invention does not necessarily refer to the same embodiment, but means at least one.

[0051] In the following embodiments, the terms "first" and "second" are not restrictive but are used to distinguish one component from other components.

[0052] In the following embodiments, unless the context clearly indicates otherwise, an expression in the singular includes an expression in the plural.

[0053] In the following embodiments, terms such as “including” or “having” indicate the presence of features or constituent elements described in the specification, and do not preclude the possibility of adding one or more other features or constituent elements.

[0054] In the following embodiments, when referring to a certain part being “connected” to another part, it includes not only a case of being “directly connected” but also a case of being “indirectly connected” with other parts interposed therebetween.

[0055] In the drawings, the size of the components may be exaggerated or reduced for the convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of explanation, and the present invention is not necessarily limited to the contents shown.

[0056] Figure 1 is a perspective view schematically showing a stent delivery device according to an embodiment of the present invention, Figure 2 is an exploded perspective view schematically showing a stent delivery device according to an embodiment of the present invention, Figure 3 FIG. 1 is a partial cross-sectional perspective view schematically showing the interior of a handle portion according to an embodiment of the present invention.

[0057] Reference Figures 1 to 3The stent delivery device 10 according to an embodiment of the present invention may include a shell 100 , a body 200 , a handle 300 , a first tube 400 , a shaft 500 , a head 600 , a second tube 700 , a third tube 800 , and a front end 900 .

[0058] First, the shell 100 is a main body arranged to be grasped by the user, and a connecting pipe 120 may be extended and formed on one side of the shell 100. Inside the shell 100, a center hole is formed along the length direction of the shell 100. In one embodiment, a shell advance and retreat component 110 may be inserted perpendicularly to the length direction of the shell 100. A first hole 111 having an inner diameter greater than the outer diameter of the protruding components 520 and 530 to be described later may be formed in the shell advance and retreat component 110. In addition, a second hole 112 having an inner diameter smaller than the outer diameter of the protruding components 520 and 530 may be formed in the shell advance and retreat component 110 in a manner that contacts the first hole 111.

[0059] In one embodiment, the main body 200 may be implemented as a tube having a predetermined length. One side of the main body 200 may be coupled to the connection tube 120 of the housing 100, and the other side may be coupled to the head 600. In addition, a stopper 210 for limiting the sliding movement of the handle 300 described later may be formed on a portion of the outer circumferential surface of the main body 200.

[0060] The stopper 210 according to an embodiment may include a first stopper 211 and a second stopper 212. The first stopper 211 may be formed along the circumferential direction of the outer circumferential surface of the main body 200, and may be formed to protrude from a portion of the outer circumferential surface of the main body 200. The second stopper 212 may be formed to be spaced apart from the first stopper 211 in the length direction of the main body 200, and may be formed to protrude from a portion of the outer circumferential surface of the main body 200.

[0061] Here, if the periphery of the outer circumference of the main body 200 is used as a reference, the first stopper 211 may protrude along a portion of the periphery of the outer circumference of the main body 200 , and the second stopper 212 may protrude along another portion of the periphery of the outer circumference of the main body 200 .

[0062] Furthermore, a guide hole 220 may be formed long in the longitudinal direction at the lower side of the outer circumferential surface of the main body 200. That is, the guide hole 220 may be formed from one end to the other end of the main body 200.

[0063] The handle 300 can slide and move along the length direction of the main body 200 while penetrating and being combined with the main body 200. A space is formed inside the handle 300 into which the connection tube 120 and at least a portion of the main body 200 can be inserted. Accordingly, when the handle 300 is close to the housing 100, the connection tube 120 can be inserted into the internal space of the handle 300.

[0064] In one embodiment, the first tube 400 may pass through and be combined with the inside of the handle portion 300. In addition, a first tube fixing member 310 may be arranged in the internal space of the handle portion 300. The first tube fixing member 310 may maintain a state of being combined with the first tube 400 while surrounding at least a portion of the outer circumference of the first tube 400. Specifically, the first tube fixing member 310 may include: a fixing portion 311 that surrounds and fixes the first tube 400; and a leg portion 312 that is formed to extend from the fixing portion 311 to one side.

[0065] In one embodiment, a plurality of clamping platforms 320 and 330 capable of clamping both ends of the leg portion 312 are formed in the inner space of the handle portion 300, so that the first pipe fixing member 310 moves together with the handle portion 300 when the handle portion 300 slides along the length direction of the main body 200. That is, since the leg portion 312 is located between the first clamping platform 320 and the second clamping platform 330, when the handle portion 300 moves along the length direction of the main body 200, the leg portion 312 can also move in the same direction as the movement direction of the handle portion 300.

[0066] In one embodiment, a guide hole 220 is formed on the outer peripheral surface of the main body 200 along the length direction of the main body 200. Since the leg portion 312 remains inserted into the guide hole 220, when the handle portion 300 slides, the leg portion 312 can move with the guide hole 220.

[0067] Furthermore, a movement limiting component 340 protruding from a portion of the inner circumference may be provided in the inner space of the handle portion 300. When the handle portion 300 slides along the length direction of the main body portion 200, the first stopper 211 or the second stopper 212 contacts and gets stuck with the movement limiting component 340, so that the movement of the handle portion 300 can be limited to a specific interval.

[0068] However, in the case where the handle portion 300 is rotated at a predetermined angle in the peripheral direction of the outer peripheral surface, the movement restriction caused by the first stopper 211 or the second stopper 212 is released, so that the handle portion 300 can slide and move. For example, in the case where the movement restriction member 340 is stuck by the first stopper 211, the sliding movement of the handle portion 300 is restricted, and in the case where the handle portion 300 is rotated 180°, the movement restriction caused by the first stopper 211 is released, so that the handle portion 300 can slide and move to a position between the first stopper 211 and the second stopper 212. However, since the second stopper 212 contacts and is stuck with the movement restriction member 340, the movement of the handle portion 300 is restricted again, and if the handle portion 300 is rotated 180° again, the movement restriction caused by the second stopper 212 is released, so that the handle portion 300 can slide and move to the head portion 600.

[0069] At least one pressure groove 350, 360 may be arranged in front of the outer peripheral surface of the handle portion 300 to facilitate pressing with the thumb, and an additional pressure groove may be formed at the back of the handle portion 300 at a position corresponding to the front pressure grooves 350, 360.

[0070] In one embodiment, the shaft 500 may be arranged in a cylindrical shape, and the shaft 500 may be inserted into the central hole of the housing 100. A first tube moving passage 510 is formed inside the shaft 500 as a space in which the first tube 400 can move. In addition, a plurality of protruding parts 520 and 530 may be formed at predetermined intervals on the outer peripheral surface of the shaft 500. Each of the protruding parts 520 and 530 may be formed to protrude along the periphery of the outer peripheral surface of the shaft 500. The shaft 500 passes through and is combined with the first hole 111 or the second hole 112 of the housing advance and retreat part 110 inserted into the housing 100.

[0071] Furthermore, the housing advance and retreat member 110 can adjust the advance and retreat of the housing 100 by selectively inserting it into the space 540 formed by the plurality of protruding members 520 and 530. For example, if the housing advance and retreat member 110 is pressurized in one direction, the first hole 111 will be close to the shaft 500, and if the housing advance and retreat member 110 is pressurized in another direction, the second hole 112 will be close to the shaft 500. Even if the first hole 111 is close to the shaft 500, since the first hole 111 has an inner diameter greater than the outer diameter of the protruding members 520 and 530, the housing 100 can freely move in the direction along the length of the shaft 500. However, in the case where the second hole 112 is close to the shaft 500, since the second hole 112 is inserted into the space 540, the movement of the housing 100 is restricted and the housing 100 no longer moves.

[0072] The shaft fixing part 550 is a device for fixing the position of the shaft 500, and can be set at one end of the shaft 500. A plurality of concave and convex (not shown) that can be fastened to the endoscope channel entrance (not shown) can be formed on the inner circumferential surface of the shaft fixing part 550. In one embodiment, the shaft fixing part 550 and the shaft 500 can be configured as an integral type. In a specific example, the shaft fixing part 550 can be fastened to the endoscope channel entrance by rotation, and the shaft 500 can also rotate together when the shaft fixing part 550 rotates. In addition, since the shaft 500 according to one embodiment is cylindrical in shape, the edge of the second hole 112 of the housing advance and retreat part 110 is formed in an arc shape, so even if the second hole 112 is inserted into the space 540 to limit the movement of the housing 100, the shaft 500 can rotate freely. Accordingly, regardless of the movement of the housing 100, the shaft 500 can be connected or separated from the endoscope channel entrance by rotation.

[0073] The head 600 may be combined with the main body 200, and an electrode 610 may be arranged inside the head 600. The second tube 700 passes through and is combined in the first tube 400, and one end thereof may be combined and fixed to the head 600. The third tube 800 has a smaller diameter than the second tube 700, and passes through and is combined in the second tube 700. One end of the third tube 800 is combined and fixed to the head 600, and the other end may be combined with the front end 900.

[0074] In one embodiment, the front end portion 900 has a truncated cone shape and can be formed of an insulating material (for example, ceramics). In addition, a through hole 920 can be formed inside the front end portion 900 so that the guide wire 30 can pass through and connect.

[0075] Furthermore, a conductive component 910 may be combined with the outer circumferential surface of the front end portion 900. According to one embodiment, the conductive component 910 may be made of stainless steel. In one embodiment, a wire (not shown) having one end connected to the electrode 610 may be connected to the conductive component 910 through the space between the second tube 700 and the third tube 800, so that the current applied to the electrode 610 may be transmitted to the conductive component 910. Furthermore, in one embodiment, the wire may be made of copper wire.

[0076] The process of placing the stent 50 using the stent delivery device 10 according to an embodiment of the present invention is described as follows. First, Figure 4 FIG. 2 schematically shows a state in which the front end portion 900 of the stent delivery device according to an embodiment contacts the stomach wall 20. Figure 4, the guide wire 30 passes through the inside of the first tube 400 and through the through hole 920 formed inside the front end portion 900. The front end portion 900 can move along the guide wire 30 and approach the stomach wall 20. Specifically, if the position of the housing 100 is adjusted to the direction of the stomach wall 20 after the housing advance and retreat component 110 is pressed in one direction, the conductive component 910 will contact the stomach wall 20 while the front end portion 900 moves to the side of the stomach wall 20. At this time, since the electrode 610 is connected to the power supply 40, if the position of the housing 100 is further moved in the same direction while the current is supplied to the electrode 610, the current is transmitted to the conductive component 910, and the front end portion 900 pierces the stomach wall 20 and the pseudocyst 60. After the front end portion 900 penetrates and enters the stomach wall 20 and the pseudocyst 60, the housing advance and retreat component 110 is pressed in the other direction to fix the position of the housing 100. In addition, the power supply 40 can be separated from the electrode 610.

[0077] Figure 5 The figure schematically shows a state in which a stent is deployed for the first time after the stomach wall and the pseudocyst are perforated by a stent delivery device according to an embodiment of the present invention. Figure 5 After the handle 300 is rotated 180° to release the movement restriction caused by the first stopper 211, if the handle 300 is moved to a position between the first stopper 211 and the second stopper 212, the first tube 400 will also move along with the movement of the handle 300. In this process, one end of the bracket 50 loaded in the first tube 400 is exposed to the outside of the first tube 400. At this time, since the other end of the bracket 50 is maintained in a state of close contact with the second tube 700, when the first tube 400 moves, the bracket 50 will not be pushed backward or move together with the first tube 400, and the position of the bracket 50 can be stably maintained.

[0078] Figure 6 The figure schematically shows a state where a stent that is first deployed by a stent delivery device according to an embodiment of the present invention is closely attached to the inner wall of a pseudocyst. Figure 6 If the housing advance and retreat member 110 is pressurized in one direction to adjust the position of the housing 100 to the direction of the head 600, the stent exposed to the outside of the first tube 400 will move toward the direction of the head 600 and adhere to the inner wall of the pseudocyst 60. If the stent 50 adheres to the inner wall of the pseudocyst 60, the housing advance and retreat member 110 is pressurized again in the other direction to fix the position of the housing 100.

[0079] Figure 7 The diagram schematically shows the state in which the stent delivery device according to one embodiment of the present invention deploys the stent for the second time. Figure 7If the handle 300 is moved toward the head 600 after releasing the movement restriction caused by the second stopper 212 by rotating the handle 300 located between the first stopper 211 and the second stopper 212 by 180°, the first tube 400 also moves along with the movement of the handle 300. In this process, the other end of the bracket 50 loaded in the first tube 400 is completely exposed to the outside of the first tube 400, and the setting of the bracket 50 is completed.

[0080] As described above, according to various embodiments of the present invention, since the current applied to the electrode 610 is transmitted to the conductive member 910, the front end portion 900 easily penetrates and enters the tissue, that is, it is easy to perforate the stomach wall 20 or the pancreatic wall.

[0081] Furthermore, when the bracket 50 is deployed at the perforated portion, the movement restriction caused by the first stop member 211 is released by rotating the handle portion 300, thereby enabling the first deployment of the bracket 50, and if the handle portion 300 is rotated again after the first deployment of the bracket 50, the movement restriction caused by the second stop member 212 is released, thereby enabling the second deployment of the bracket 50.

[0082] Specifically, when a predetermined force is applied to the pressure grooves 350 and 360 formed on the outer circumferential surface of the handle portion 300, the handle portion 300 can be rotated with the main body portion 200 as the axis, and the movement restriction caused by the first stopper 211 is released, and if the handle portion 300 is moved to a position between the first stopper 211 and the second stopper 212, the first deployment of the bracket 50 can be achieved. Furthermore, if the handle portion 300 is rotated again when the handle portion 300 reaches between the first stopper 211 and the second stopper 212 to release the movement restriction caused by the second stopper 212, and the handle portion 300 is moved to the head portion 600, the second deployment of the bracket 50 can be achieved.

[0083] The main body 200 is formed in a cylindrical shape so that the handle 300 can be easily rotated, which has an advantage of being easy to operate because the user can easily release the movement restriction caused by the stopper 210 by rotating the handle 300 with only the force of the thumb.

[0084] Furthermore, according to various embodiments of the present invention, during the first and second deployment of the bracket 50, the movement restriction caused by the stoppers 211 and 212 can be easily released by rotating the handle portion 300. Therefore, compared with the method of separating the safety device for preventing secondary deployment after the first deployment of the bracket 50 and deploying the bracket 50 for the second time, it is easier to set up the bracket 50, and the bracket 50 can be safely deployed even without additionally providing a safety device to prevent the bracket 50 from suddenly deploying.

[0085] As described above, although the present invention has been specifically described by referring to the embodiments of the accompanying drawings, since the above embodiments are only described by citing the preferred embodiments of the present invention, the present invention should not be understood as being limited to the above embodiments, and the scope of rights of the present invention should be understood as the scope of the claims and their equivalent concepts.

Claims

1. A stent delivery device, characterized in that: include: A shell body having a central hole formed in a length direction; a main body portion, coupled to one side of the housing and having a predetermined length; A handle portion penetrates and is combined with the main body portion in a manner that it can slide and move along the length direction of the main body portion; as well as A head portion is combined with one side of the main body portion and has electrodes arranged inside. A stopper for limiting the sliding movement of the handle is formed in a part of the outer peripheral surface of the main body, and when the handle is rotated at a predetermined angle along the peripheral direction of the outer peripheral surface, the movement restriction caused by the stopper is released so that the handle can slide. The stent delivery device further comprises: A first tube, passing through and coupled to the interior of the handle; and a shaft, in which a first tube moving passage is formed to enable the first tube to move, A plurality of protruding parts are formed on the outer peripheral surface of the shaft at predetermined intervals. The housing comprises: The shell advance and retreat component is selectively inserted into the space formed by the plurality of protruding components to adjust the advance and retreat of the shell. The handle portion comprises: a first pipe fixing member surrounding and coupled to at least a portion of an outer peripheral surface of the first pipe, The first tube fixing member has a fixing portion and a leg portion, wherein the fixing portion surrounds and fixes the first tube, and the leg portion is formed by extending from the fixing portion. A plurality of clamping platforms capable of clamping both ends of the leg portion are formed inside the handle portion so that the first pipe fixing member moves together when the handle portion slides. A guide hole is formed on the outer peripheral surface of the main body along the length direction of the main body, and when the handle slides, the leg part moves along the guide hole. The stopper comprises: a first stopper formed along the peripheral direction of the outer peripheral surface of the main body and formed to protrude from a part of the outer peripheral surface of the main body; and The second stopper is spaced apart from the first stopper in the longitudinal direction of the main body and is formed to protrude from a part of the outer peripheral surface of the main body. Wherein, based on the periphery of the outer circumference of the main body, the first stopper protrudes along a portion of the periphery of the outer circumference of the main body, and the second stopper protrudes along another portion of the periphery of the outer circumference of the main body. A movement limiting member is formed inside the handle portion and can be caught by the first stopper or the second stopper when the handle portion slides. When a predetermined force is applied to the outer peripheral surface of the handle portion, the handle portion rotates around the main body portion and the movement restriction caused by the first stop is released. If the handle portion is moved to a position between the first stop and the second stop, the first deployment of the bracket is achieved. If the handle portion is rotated again when the handle portion reaches between the first stop and the second stop to release the movement restriction caused by the second stop and the handle portion is moved to the head, the second deployment of the bracket is achieved.

2. The stent delivery device according to claim 1, wherein: The stent delivery device further comprises: A second tube, which passes through and is combined with the first tube, and one end of which is combined with the head; a third tube having a smaller diameter than the second tube and having one end coupled to the head; and The front end is connected to the other end of the third tube and is formed of an insulating material. Wherein, a conductive component is combined with the outer peripheral surface of the front end portion to transmit the current applied to the electrode.

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