Occluder and occluder locking system

Abstract

The present invention provides an occluder comprising a proximal occluding portion, a first tightening member disposed proximally of the proximal occluding portion, and a conical guide structure disposed on the outer periphery of the first tightening member. The inner diameter of the guide structure gradually decreases from the distal end to the proximal end. The guide structure provides a guiding function, facilitating easy retraction of the occluder into the sheath. The present invention also relates to a locking system for the occluder.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an occluder and an occluder locking system. Background Art

[0002] Occluders are implantable devices used for interventional treatment of atrial septal defects, ventricular septal defects, and patent ductus arteriosus. Existing occluders are categorized as patent ductus arteriosus occluders, atrial septal defect occluders, and ventricular septal defect occluders. The basic structure of a patent ductus arteriosus occluder is a mushroom-shaped device woven from a superelastic nickel-titanium alloy with an internal polymer biofilm. The mesh structure is filled with polyester or polytetrafluoroethylene. Atrial septal defect occluders and ventricular septal defect occluders consist of a self-expanding double-disc structure densely woven from nickel-titanium alloy wires, each with a polymer flow-blocking membrane within it. However, when the existing occluder is used in interventional surgery, when the occluder is stretched to retract it into the sheath, the proximal end face of the occluder is roughly flat and the alloy wires converge at the two end faces, so the two ends of the occluder are easily bulged after being stretched, making it inconvenient to insert the stretched occluder into the sheath and push it inside the sheath. More importantly, when the occluder is not locked successfully, the occluder needs to be retrieved. At this time, the occluder is located at the rupture of the lesion and the inner steel cable connected to the occluder may also bend. During retrieval, the occluding part of the occluder often abuts against the side wall of the distal port of the sheath, which makes the occluder recovery problematic, thereby reducing the efficiency of the operation and affecting the success rate of the operation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an occluder that is easy to use and an occluder locking device having the occluder in view of the defects of the prior art.

[0004] In order to solve the above technical problems, the present invention provides an occluder, including a proximal sealing part, a first tightening piece is provided at the proximal end of the proximal sealing part, and a conical guide sliding structure is provided on the outer periphery of the first tightening piece of the proximal sealing part, and the inner diameter of the guide sliding structure gradually decreases from the distal end to the proximal end.

[0005] The present invention also provides an occluder locking system, including a sheath tube adjustable bending device, a loader, a pushing device and an occluder, the sheath tube adjustable bending device includes a sheath tube, the loader includes a loading tube, the distal end of the loading tube is inserted into the sheath tube, the pushing device includes a pushing combination, the occluder includes a proximal blocking part, a first tightening piece is provided at the proximal end of the proximal blocking part, and a conical guide sliding structure is provided on the outer periphery of the first tightening piece of the proximal blocking part, the inner diameter of the guide sliding structure gradually decreases from the distal end to the proximal end, and the guide sliding structure has a guiding function, which facilitates the pushing combination to retract the occluder into the sheath tube.

[0006] The proximal end of the proximal sealing portion of the occluder provided by the present invention is provided with a conical guide sliding structure on the outer periphery of the first tightening member. When the occluder needs to be recovered into the sheath, the guide sliding structure has a guiding function, so the occluder can easily enter the sheath along the guide sliding structure, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the implementation. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 It is a structural schematic diagram of an occluder provided in one embodiment of the present invention.

[0009] Figure 2 yes Figure 1 Schematic cross-sectional view along line II-II.

[0010] Figure 3 yes Figure 2 Magnified view of the connecting pin.

[0011] Figure 4 yes Figure 2 Top view of the connecting bolt.

[0012] Figure 5 Is set with Figure 1 Schematic diagram of the structure of the occluder locking system of the occluder.

[0013] Figure 6 yes Figure 5 Schematic diagram of the exploded view of the occluder and push assembly.

[0014] Figure 7 yes Figure 6 Schematic diagram of the distal end face structure of the push tube in the push combination.

[0015] Figure 8 yes Figure 6 Schematic cross-sectional view along line VIII-VIII.

[0016] Figure 9 yes Figure 6 Schematic cross-sectional view of the push member after it is inserted into the push tube.

[0017] Figure 10 yes Figure 5 Schematic diagram of the structure of the pushing device.

[0018] Figure 11 yes Figure 10 Schematic diagram of the push device in the exploded view.

[0019] Figure 12 yes Figure 10 Schematic cross-sectional view along line XII-XII.

[0020] Figure 13 yes Figure 11 Schematic diagram of the three-dimensional exploded structure of the first shell and the second shell.

[0021] Figure 14 yes Figure 13 Schematic diagram of the planar structure of the inner side of the first shell.

[0022] Figure 15 yes Figure 13 Schematic diagram of the planar structure of the inner side of the second shell.

[0023] Figure 16 yes Figure 15 Schematic diagram of the planar structure of the outer side of the second shell.

[0024] Figure 17 yes Figure 11 Schematic diagram of the three-dimensional structure of the outer gusset plate.

[0025] Figure 18 yes Figure 11 Schematic diagram of the three-dimensional decomposition of the end cover.

[0026] Figure 19 yes Figure 18 Cross-sectional view along line XIX-XIX.

[0027] Figure 20 yes Figure 11 Schematic diagram of the three-dimensional exploded structure of the first clamping block, the movable block and the second clamping block.

[0028] Figure 21 yes Figure 20 A structural schematic diagram of one side of the first clamping block in FIG.

[0029] Figure 22 yes Figure 20 A schematic structural diagram of the other side of the first clamping block.

[0030] Figure 23 yes Figure 20 Schematic diagram of the side structure of the second clamping block.

[0031] Figure 24 yes Figure 20 A magnified view of the active block in .

[0032] Figure 25 yes Figure 11 Magnified view of the button in .

[0033] Figure 26 yes Figure 11 Schematic diagram of the structure of the first rotating mechanism.

[0034] Figure 27 yes Figure 26 Cross-sectional view along line XXVII-XXVII.

[0035] Figure 28 yes Figure 26 Schematic diagram of the three-dimensional structure of the rotating column.

[0036] Figure 29 yes Figure 11 Schematic diagram of the three-dimensional structure of the second rotating member.

[0037] Figure 30 yes Figure 29 A side view of the second rotating member in FIG.

[0038] Figure 31 yes Figure 30 Cross-sectional view along line XXXI-XXXI.

[0039] Figure 32 yes Figure 11 Combination diagram of the pushing device in.

[0040] Figure 33 yes Figure 32 Cross-sectional view along line XXXIII-XXXIII. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0042] Definition of orientation: For the sake of clarity, the end closer to the operator during surgery is referred to as the "proximal end" and the end farther from the operator is referred to as the "distal end"; the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; the above definitions are for convenience of expression only and are not to be construed as limitations on the present invention.

[0043] See also Figures 1 to 4The present invention provides an occluder 10 comprising a proximal occluding portion 11, a distal occluding portion 15, and a waist portion 18 disposed between the proximal and distal occluding portions 11 and 15. A first tightening member 110 is disposed proximally of the proximal occluding portion 11. A conical guide structure 111 is disposed on the outer periphery of the first tightening member 11. The inner diameter of the guide structure 111 gradually decreases from the distal end to the proximal end. In this embodiment, the guide structure 111 is an inverted conical structure.

[0044] The proximal end of the proximal occluding portion 11 of the occluder 10 of the present invention is provided with a conical guide structure 111 on the outer periphery of the first tightening member 110. If the occluder 10 fails to lock and needs to be retrieved into the sheath, the guide structure 111 provides a guide, allowing the occluder 10 to easily enter the sheath, making it easier to use. The outer diameter of the proximal end of the guide structure 111 is slightly smaller than the inner diameter of the distal end of the sheath, facilitating the proximal insertion of the guide structure 111 into the sheath during retrieval.

[0045] The first blocking member 11, the second blocking member 15 and the waist 18 are all double-layer disc structures with an internal space woven from metal wires, and the middle of the metal wire is bent to form the waist 18. The metal wire can be, but is not limited to, nickel-titanium alloy, cobalt-chromium alloy, stainless steel or other metal materials with good biocompatibility, preferably superelastic shape memory alloy nickel-titanium wire. At least one flow-blocking membrane is provided inside the proximal blocking portion 11 and / or the distal blocking portion 15. The flow-blocking membrane can be fixed to the inside of the proximal blocking portion 11 and the distal blocking portion 15 by suturing or bonding. The flow-blocking membrane can be, but is not limited to, a polytetrafluoroethylene film, a polyurethane film, or a polyimide film.

[0046] In other embodiments, the first blocking member 11 , the second blocking member 15 and the waist portion 18 may be formed into a grid or frame structure by cutting metal tubes.

[0047] like Figure 2 As shown, the proximal sealing portion 11 includes a first annular groove 112 connected to the waist portion 18 and recessed toward the proximal end, and a first sidewall 113 connected to the outer edge of the first annular groove 112. The first sidewall 113 has a generally V-shaped cross-section. The first sidewall 113 extends from the outer edge of the first annular groove 112 toward the proximal end for a distance, then bends and extends distally to connect to the distal end of the guide structure 111. The first sidewall 113 and the guide structure 111 form an annular valley 115 that is recessed toward the distal end. The first sidewall 113 and the first annular groove 112 form an annular first clamping shoulder 116, which has a generally V-shaped cross-section.

[0048] Specifically, the wire braided into the first annular groove 112 first extends proximally at an angle of 30-45 degrees to the axial direction to form a first sidewall 113, then folds back distally to form an annular valley 115. A smooth structure 18 is formed at the junction of the annular valley 115 and the first tightening member 110. When the occluder 10 begins to clamp the rupture, the proximal occluding portion 11 provides the greatest clamping force, facilitating endothelialization of the occluder 10.

[0049] The first tightening member 110 includes an inner sleeve 117 disposed at the proximal end of the proximal end blocking portion 11 and a protruding portion 118 fixed to the inner sleeve 117. The proximal end of the metal wire converges and is positioned between the inner sleeve 117 and the protruding portion 118. The metal wire between the inner sleeve 117 and the protruding portion 118 can be fixed by welding, clamping, or other methods.

[0050] In this embodiment, the internal sleeve 117 is a steel sleeve with both ends open, and the protrusion 118 is also a cylindrical body with both ends open. The inner diameter of the internal sleeve 117 is larger than the outer diameter of the protrusion 118. The internal sleeve 117 can be arranged inside or outside the proximal end blocking portion 11. The internal sleeve 117 is sleeved on the protrusion 118, and the proximal end of the metal wire is located between the inner wall of the internal sleeve 117 and the outer wall of the protrusion 118. Preferably, the internal sleeve 117 is located inside the proximal end blocking portion 11, and the distal end of the protrusion 118 extends into the interior of the proximal end blocking portion 11. The internal sleeve 117 is sleeved on the distal end of the protrusion 118, and the proximal end of the metal wire is folded inward and positioned between the inner wall of the internal sleeve 117 and the outer wall of the distal end of the protrusion 118. The inner sleeve 117 is disposed within the proximal occluding portion 11. Once the occluder 10 is locked, this reduces the length of the first tightening member 110 that protrudes axially from the proximal occluding portion 11, thereby reducing the risk of postoperative complications. The protruding portion 118 has an axial through-hole 1182 defined therein, and an external thread 1184 formed on its outer wall.

[0051] The distal sealing portion 15 includes a second annular groove 152 connected to the waist portion 18 and recessed distally, and a second sidewall 153 connected to the outer edge of the second annular groove 152. The second sidewall 153 extends obliquely distally from the second annular groove 152 and converges at the distal end of the distal sealing portion 15. The second sidewall 153 and the second annular groove 152 form a second clamping shoulder 156, the outer edge of which corresponds to the outer edge of the first clamping shoulder 116. When the occluder 10 is sealing a rupture, the first and second clamping shoulders 116 and 156 clamp onto the opposing side walls surrounding the rupture.

[0052] The distal occluding portion 15 also includes a second tightening member 150 disposed at the distal end. The metal wire braided within the second annular groove 152 first extends distally toward the second tightening member 150 at an angle of 30-45 degrees to the axial direction to form a second sidewall 153. The metal wire then approaches the second tightening member 150 and is secured thereto. When the occluder 10 begins to clamp the rupture, the specialized structures of the second annular groove 152, second sidewall 153, and second clamping shoulder 156 of the distal occluding portion 15, and the first annular groove 112, first sidewall 113, and first clamping shoulder 116 of the proximal occluding portion 11 provide maximum clamping force and facilitate endothelialization of the occluder 10.

[0053] Please refer to Figure 2 -3. The second tightening member 150 includes an external sleeve 157 and a connecting bolt 158 ​​connected to the proximal end of the external sleeve 157. The distal end of the wire converges and is positioned between the external sleeve 157 and the distal end of the connecting bolt 158. The connecting bolt 158 ​​extends proximally and has an external thread 1582 formed on its proximal outer wall. The outer diameter of the proximal end of the connecting bolt 158 ​​is slightly smaller than the inner diameter of the through-hole 1182 of the protrusion 118. Proximally moving the connecting bolt 158 ​​allows the proximal end of the connecting bolt 158 ​​to pass through the through-hole 1182 and be threadedly engaged with the nut. The wire between the external sleeve 157 and the connecting bolt 158 ​​can be secured by welding, clamping, or other means. A radially extending flange 1585 is provided on the end of the connecting bolt 158 ​​proximal to the external sleeve 157. The outer diameter of the flange 1585 is larger than the inner diameter of the through-hole 1182 of the protrusion 118. The protruding disc 1585 can be in a circular, square, or other shape, as long as the protruding disc 1585 can be stopped at the distal end of the protruding portion 118 around the through hole 1182. The metal wire between the external sleeve 157 and the connecting bolt 158 ​​can be fixed by welding, clamping, or other methods. Specifically, the external sleeve 157 can be a cylinder with two open ends, the distal end of the metal wire is welded to the inner side of the cylinder, the distal end of the connecting bolt 158 ​​is provided with a convex surface in the radial direction, the diameter of the convex surface is larger than the diameter of the cylinder, the proximal end of the connecting bolt 158 ​​passes through the cylinder, and the convex surface is clamped and connected to the distal end surface of the cylinder. In addition, the external sleeve 157 can also be a structure with an inner cavity provided in the proximal direction toward the distal end, the distal end of the connecting bolt 158 ​​is fixed in the inner cavity, and the metal wire is welded between the external sleeve 157 and the connecting bolt 158. The latter structure is adopted in this embodiment.

[0054] If the connecting bolt 158 ​​is not provided with the convex plate 1585, during the locking process of the occluder 10, the connecting bolt 158 ​​is stretched in the proximal direction. When the force acting on the connecting bolt 158 ​​is large, the second sealing member 15 made of a metal wire fixed to the connecting bolt 158 ​​may be pulled into the rupture through the through hole 1182 of the protruding portion 118, thereby causing the edge of the second occluder 15 to tilt up to form a trumpet-like structure. After tilting up, the second occluder 15 cannot form a clamping force on the tissue around the rupture, thereby affecting the sealing effect of the rupture. When the connecting bolt 158 ​​of the device 10 pulls the distal sealing part 15 close to the rupture, the convex disc 1585 can stop at the distal end of the protrusion 118 to play a blocking role, which can ensure that the distal sealing part 15 is located in the cavity of the occluder 10 and will not be pulled into the rupture by the connecting bolt 158, thereby preventing the edge of the second occluder 15 from tilting up, and ensuring that the first clamping shoulder 116 and the second clamping shoulder 156 form a good clamping effect on the rupture and the flow-blocking membranes arranged inside the proximal sealing part 11, the distal sealing part 15 and the waist 18.

[0055] Before the connecting bolt 158 ​​is locked with the nut, the connecting bolt 158 ​​is located inside the occluder 10, and the proximal end of the connecting bolt 158 ​​passes through the waist 18 of the occluder 10. A screw hole 1583 is axially defined in the middle of the proximal end surface of the connecting bolt 158.

[0056] The first annular groove 112 and the second annular groove 152 are arranged at the proximal and distal ends of the waist 18 relative to each other. The first annular groove 112 and the second annular groove 152 form an annular space. When the occluder 10 is installed in the rupture, the tissue around the rupture is inserted into the annular space. The first clamping shoulder 116 and the second clamping shoulder 156 can clamp the opposite side walls of the tissue around the rupture, which is more conducive to the endothelialization of the occluder.

[0057] Preferably, the screwing direction of the external thread 1582 of the connecting bolt 158 ​​is opposite to the screwing direction of the external thread 1184 of the protruding portion 118. Specifically, when the external thread 1582 of the connecting bolt 158 ​​is a left-handed thread, the external thread 1184 of the protruding portion 118 is a right-handed thread; when the external thread 1582 of the connecting bolt 158 ​​is a right-handed thread, the external thread 1184 of the protruding portion 118 is a left-handed thread.

[0058] In other embodiments, the occluder 10 may omit the inner sleeve 117 and the outer sleeve 157 , the distal ends of the metal wires converge and are positioned at the distal end of the connecting bolt 158 ​​and are positioned by welding, and the proximal ends of the metal wires converge and are positioned at the distal end of the protrusion 118 and are positioned by welding.

[0059] like Figure 5As shown, the present invention also provides an occluder locking system, which includes an occluder 10, a sheath bending device 20, a dilator 30, a loader 40 disposed at the proximal end of the sheath bending device 20, and a pushing device 60 disposed at the proximal end of the loader 40. The sheath bending device 20 includes a housing 21, a sheath 23 whose proximal end is disposed within the housing 21, and an adjustment mechanism 25 for adjusting the bendable distal end of the sheath 23. The loader 40 includes a loading tube 42 and a sealing seat 44 disposed at the proximal end of the loading tube 42, the distal end of the loading tube 42 being insertable into the sheath 23. The pushing device 60 can push the occluder 10, and the pushing device 60 includes a housing 61 having an accommodating space, a first pushing assembly 64 partially disposed within the housing 61, a second pushing assembly 67 partially sleeved on the housing 61, and a pushing assembly 68, the proximal end of the pushing assembly 68 being disposed within the housing 61.

[0060] The dilator 30 is an elongated cylindrical structure with a tapered distal diameter, forming a quasi-conical structure. Specifically, the dilator 30 includes an expansion rod 32 and a connecting portion 35 disposed at the proximal end of the expansion rod 32. The diameter of the expansion rod 32 tapers distally, forming a quasi-conical structure. This quasi-conical structure facilitates insertion of the expansion rod 32 into the sheath 23. During surgery, the dilator 30 must first be assembled into the sheath bending device 20 to form the expansion assembly.

[0061] like Figures 6 to 9As shown, the push assembly 68 includes a push member 682, a push tube 684 movably mounted on the push member 682, and a nut 689 positioned within the distal end of the push tube 684. The distal end of the push member 682 is detachably connected to the connecting bolt 158 ​​of the occluder 10. The inner wall of the distal end of the push tube 684 is provided with an internal thread 6842 corresponding to the external thread 1184 of the protrusion 118. The first push assembly 64 includes a sliding mechanism 65 that can drive the push member 682 to slide back and forth axially within the push tube 684, thereby driving the connecting bolt 158 ​​to abut or move away from the threaded hole of the nut 689. The second push assembly 67 includes a rotating mechanism that can drive the push tube 684 to rotate, thereby driving the nut 689 to rotate so that the connecting bolt 158 ​​is threadedly connected to the nut 689. During the process of threading the connecting bolt 158 ​​onto the nut 689, the screwing direction of the external thread 1582 of the connecting bolt 158 ​​is opposite to the screwing direction of the external thread 1184 of the protruding portion 118. Therefore, the tightening direction of the connecting bolt 158 ​​and the nut 689 is opposite to the tightening direction of the external thread 1184 of the protruding portion 118 and the internal thread 6842 of the pushing tube 684. This allows the external thread 1184 of the protruding portion 118 to be separated from the internal thread 6842 of the pushing tube 684. That is, when the connecting bolt 158 ​​is screwed onto the nut, the protruding portion 118 and the pushing tube 684 can be separated at the same time; and when the connecting bolt 158 ​​is separated from the nut, the protruding portion 118 and the pushing tube 684 can be screwed together at the same time. Therefore, the occluder 10 not only has high locking reliability and excellent occluding effect, but is also convenient and easy to use.

[0062] Specifically, the push assembly 68 is a cable assembly, the push member 682 is a highly elastic cable, and the push tube 684 is a highly elastic cable tube, into which the cable is movably inserted. The push tube 684 includes a main section 6841 and an extension section 6843 disposed at the distal end of the main section 6841. The nut 689 is positioned within the extension section 6843. The internal threads 6842 are located on the inner wall of the distal end of the extension section 6843 and mate with the external threads 1184 of the protrusion 118. When the occluder 10 is connected to the push assembly 68, the threaded fastening direction of the extension section 6843 and the protrusion 154 is opposite to the fastening direction of the connecting bolt 158 ​​and the nut 689. The threads and pitch of the extension section 6843 and the protrusion 154 are equal to or greater than those of the nut 689, so that the proximal end of the connecting bolt 158 ​​extends beyond the proximal end surface of the nut 689.

[0063] The outer wall of the distal end of the pusher 682 is provided with an external thread 6822 that matches the screw hole 1583 of the connecting bolt 158. The distal end of the pusher 682 can movably pass through the nut 689 and the extension section 6843. Specifically, a cylindrical connecting rod 6821 is axially projected from the middle of the distal end surface of the pusher 682. The outer diameter of the connecting rod 6821 is smaller than that of the pusher 682, and the external thread 6822 is located on the outer wall of the distal end of the connecting rod 6821.

[0064] The outer diameter of the main section 6841 is smaller than the outer diameter of the extension section 6843, and the inner diameter of the main section 6841 is smaller than the inner diameter of the extension section 6843. A stepped surface 6845 is formed inside the push tube 684 between the proximal end of the extension section 6843 and the distal end of the main section 6841, and the nut 689 can abut against the stepped surface 6845. A locking groove 6846 is formed on the inner wall of the proximal end of the extension section 6843, and the nut 689 can be locked in the locking groove 6846. The locking groove 6846 prevents the nut 689 from rotating within the push tube 684, allowing the nut 689 to slide axially within the extension section 6843. Specifically, the engaging groove 6846 is formed as a regular radial inward concave on the inner wall of the proximal end of the extension section 6843. The engaging groove 6846 can engage the nut 689. The nut 689 can be, for example, a hexagonal nut. The engaging groove 6846 is a hexagonal groove corresponding to the hexagonal nut, that is, the radial cross-section of the engaging groove 6846 is hexagonal. Therefore, when the nut 689 is engaged in the engaging groove 6846, the nut 689 cannot rotate relative to the push tube 684, but the nut 689 slides axially within the extension section 684, and the nut 689 abuts the stepped surface 6845.

[0065] Please also refer to Figures 10 to 12 The first pushing assembly 64 includes a sliding mechanism 65 and a first rotating mechanism 66. The sliding mechanism 65 can drive the pushing member 682 to slide axially and position in the pushing tube 684. The first rotating mechanism 66 can drive the pushing member 682 to rotate in the pushing tube 684. The second pushing assembly 67 includes a second rotating mechanism 670. The second rotating mechanism 670 can drive the pushing tube 684 to rotate outside the pushing member 682.

[0066] The sliding mechanism 65 of the pushing device 60 can drive the pushing member 682 to slide axially in the pushing tube 684, and can drive the proximal end of the connecting bolt 158 ​​to pass through the through hole 153 of the protrusion 118 to abut or move away from the nut 689 positioned in the pushing tube 684; the first rotating mechanism 66 can drive the pushing member 682 to rotate in the pushing tube 684, and can realize the threaded connection or separation of the external thread 6822 of the pushing member 682 and the screw hole 1583 of the connecting bolt 158; the second rotating mechanism 670 can drive the pushing tube 684 to rotate outside the pushing member 682, driving the nut 689 to rotate, so that the nut 689 is threadedly connected to the connecting bolt 158 ​​and the external thread 1184 of the protrusion 118 is separated from the internal thread 6842 of the pushing tube 684, or the nut 689 is separated from the connecting bolt 158 ​​and the external thread 1184 of the protrusion 118 is threadedly connected to the internal thread 6842 of the pushing tube 684. The pushing device 60 is simple to operate and easy to use, which improves the reliability and efficiency of the pushing device 60 and thus reduces the operation time.

[0067] The shell 61 includes a first outer shell 611, a second outer shell 613, an outer buckle plate 615 and an end cover 616. The first outer shell 611 is connected to the second outer shell 613 to form a tubular structure with open ends. The sliding mechanism 65 is axially arranged in the tubular structure, the first rotating mechanism 66 is arranged at the proximal end of the tubular structure, the second rotating mechanism 670 is arranged at the distal end of the tubular structure, and the end cover 616 is arranged at the distal end of the second rotating mechanism 670.

[0068] like Figure 13 and Figure 15 As shown, at least one first support piece 6112 and at least one second support piece 6113 are axially disposed at the distal end of the inner wall of the first housing 611, and at least one third support piece 6115 is disposed at the proximal end of the inner wall of the first housing 611. The first support piece 6112, the second support piece 6113, and the third support piece 6115 are all semi-circular ring-shaped pieces, and the first support piece 6112 is spaced apart from the second support piece 6113. The axes of the first support piece 6112, the second support piece 6113, and the third support piece 6115 all extend axially, and the axes of the first support piece 6112, the second support piece 6113, and the third support piece 6115 coincide with each other.

[0069] In this embodiment, there are two first support plates 6112, which are axially spaced and parallel to each other; there is one second support plate 6113; and there are two third support plates 6115, which are axially spaced and parallel to each other.

[0070] In other embodiments, the number of the first support piece 6112 , the second support piece 6113 , and the third support piece 6115 may be other values.

[0071] The outer wall of the first housing 611 is provided with a rectangular flat surface 6110. The length of the flat surface 6110 extends axially, that is, from the distal end to the proximal end. A strip-shaped opening 6116 is defined along the axial direction of the flat surface 6110. The strip-shaped opening 6116 is located between the second support plate 6113 and the third support plate 6115, and extends from the distal end to the proximal end of the first housing 611. A rack 6117 is provided on the inner wall of the first housing 611 on at least one side of the strip-shaped opening 6116. The rack 6117 extends from the distal end to the proximal end of the strip-shaped opening 6116. A plurality of latching tabs 6118 are protruding from opposite side walls of the first housing 611.

[0072] In this embodiment, the inner wall of the first housing 611 defines strip-shaped grooves along the axial direction on two opposite sides of the strip-shaped opening 6116 , and a rack 6117 is disposed in each strip-shaped groove.

[0073] like Figure 13 、 Figure 15 and Figure 16 As shown, the structure of the second housing 613 is similar to that of the first housing 611. At least one fourth support piece 6132 and at least one fifth support piece 6133 are axially disposed at the distal end of the inner wall of the second housing 613, and at least one sixth support piece 6135 is disposed at the proximal end of the inner wall of the second housing 613. The fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 are all semi-circular ring-shaped pieces, and are spaced apart from the fourth support piece 6132 and the fifth support piece 6133. The axes of the fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 all extend axially, and the axes of the fourth support piece 6132, the fifth support piece 6133, and the sixth support piece 6135 coincide with each other. When the first shell 611 is covered with the second shell 613, the first support piece 6112, the second support piece 6113 and the third support piece 6115 of the first shell 611 correspond one-to-one with the fourth support piece 6132, the fifth support piece 6133 and the sixth support piece 6135 of the second shell 613 respectively; and the first support piece 6112 and the corresponding fourth support piece 6132 form a circular support piece, the second support piece 6113 and the fifth support piece 6133 form a circular support piece, and the third support piece 6115 and the corresponding sixth support piece 6135 form a circular support piece.

[0074] In this embodiment, there are two fourth support pieces 6132 , which are spaced apart and parallel to each other; there is one fifth support piece 6133 ; and there are two sixth support pieces 6135 , which are spaced apart and parallel to each other.

[0075] In other embodiments, the number of the fourth support piece 6132 , the fifth support piece 6133 , and the sixth support piece 6135 may be other values.

[0076] At least one guide rail 6136 is axially protruded from the inner wall of the second housing 613. The guide rail 6136 is located between the fifth support piece 6133 and the sixth support piece 6135, and extends from the distal end to the proximal end. In this embodiment, two guide rails 6136 are spaced apart and protruded in parallel from the middle of the inner wall of the second housing 613. A plurality of positioning blocks 6137 are axially spaced apart between the two guide rails 6136, each of which has a retaining hole. A mounting opening 6138 is defined in the middle of the outer wall of the second housing 613, and a plurality of retaining holes 6139 are defined around the mounting opening 6138. A plurality of elastic engaging hooks 6131 are respectively protruded from the opposite side walls of the second housing 613. These engaging hooks 6131 correspond one-to-one with the engaging pieces 6118 of the first housing 611.

[0077] like Figure 17 As shown, the outer clasp 615 is an outwardly convex arc-shaped piece. The outer clasp 615 corresponds to the mounting opening 6138 of the second housing 613. The outer clasp 615 is provided with a plurality of positioning posts 6151 and a plurality of hooks 6153 on the side facing the outer clasp 615. The positioning posts 6151 correspond one-to-one with the locking holes of the positioning block 6137 of the second housing 613, and the hooks 6153 correspond one-to-one with the locking holes 6139 of the second housing 613. The outer wall of the outer clasp 615 is provided with anti-slip stripes or protrusions to increase friction, making it easier for fingers to grip the conveying device 60 and facilitate operation of the conveying device 60.

[0078] like Figure 18 and Figure 19 As shown, the end cap 616 has a conical structure and includes a cap body 6160 and a sleeve 6165 connected to the distal end of the cap body 6160. The end cap 616 defines an axial through-hole 6161 that passes through the middle of the cap body 6160 and the sleeve 6165. The cap body 6160 defines a conical cavity. The proximal inner wall of the cap body 6160 defines an annular groove 6162, the axis of which coincides with the axis of the through-hole 6161. Two opposing retaining blocks 6164 are disposed within the conical cavity at the rear end of the cap body 6160.

[0079] The sleeve 6165 is snap-fitted to the distal end of the cap body 6160. Specifically, a snap ring 6163 is protruding from the inner circumference of the through hole 6161 at the distal end of the cap body 6160. An extension column is protruding from the proximal end of the sleeve 6165 around the through hole 6161. A pair of protruding tabs 6167 are radially protruding from the proximal ends of the extension column. After the sleeve 6165 is extended and inserted into the through hole 6161 of the cap body 6160, the protruding tabs 6167 snap-fit ​​into the snap ring 6163 of the cap body 6160, thereby securing the sleeve 6165 to the cap body 6160. The sleeve 6165 is made of a soft material such as rubber or silicone. The proximal end of the push assembly 601 passes through the sleeve 6165 and the through hole 6161 of the cap body 6160 and is then connected to the housing 61. Since the sleeve 6165 is made of a soft material, the sleeve 6165 can reduce the friction and wear between the shaking of the pushing assembly 601 and the distal port of the end cover 616.

[0080] Please also refer to Figures 2 to 31 The sliding mechanism 65 is axially slidably disposed within the housing 61. The sliding mechanism 65 includes at least one guide rail 651 extending axially within the housing 61, a movable block 653 slidably disposed within the at least one guide rail 651, and a sliding member 650 capable of driving the movable block 653 to slide along the guide rail 651. The proximal end of the pushing member 682 is fixed to the movable block 653. The sliding member 650 includes a first clamping block 654 and a second clamping block 655, as well as a button 656 partially exposed from the housing 61 and connected to the sliding member 650. The first clamping block 654 can move closer to or further away from the second clamping block 655. The movable block 653 is arranged between the first clamping block 654 and the second clamping block 655. When the first clamping block 654 and the second clamping block 655 are close to each other, the movable block 653 can be clamped between the first clamping block 654 and the second clamping block 655; when the first clamping block 654 and the second clamping block 655 are away from each other, the clamping of the movable block 653 can be released, and the movable block 653 can be rotated.

[0081] In this embodiment, two parallel guide rails 651 are axially arranged in the housing 61 .

[0082] The first clamping block 654 is roughly semi-circular in structure. A rectangular top surface 6541 is provided in the middle of the outer wall of the first clamping block 654. The length of the top surface 6541 extends along the axial direction of the first clamping block 654. Part of the structure of the first clamping block 654 can pass through and slide along the strip-shaped opening 6116. Specifically, a sliding bar 6542 is provided in the middle of the top surface 6541. The length of the sliding bar 6542 extends along the length of the top surface 6541 and can be slidably inserted into the strip-shaped opening 6116 of the first housing 611. The top surface 6541 has a latching tooth 6544 on at least one side of the sliding bar 6542. The latching tooth 6544 can be engaged with a corresponding rack 6117 of the first housing 611. Preferably, the top surface 6541 is provided with latching teeth 6544 on opposite sides of the slide bar 6542. The two latching teeth 6544 can be respectively engaged with the two racks 6117 of the first housing 611. Connecting posts 6545 are respectively provided on the top surface 6541 at opposite ends of the slide bar 6542. The first clamping block 654 is provided with two guide posts 6546 and a guide slide 6547 on the two sides facing away from the top surface 6541. The guide slide 6547 on each side is positioned between the two guide posts 6546 on the same side. A first clamping groove 6548 is defined in the middle of the inner wall of the first clamping block 654. The first clamping groove 6548 can accommodate the outer wall of the movable block 653.

[0083] The second clamping block 655 is roughly semi-circular in structure. Two guide grooves 6552 are axially spaced apart from each other in the middle of the outer wall of the first clamping block 654. These two guide grooves 6552 correspond to the guide rails 6136 of the second housing 613, allowing the second clamping block 655 to slide along the guide rails 6136. Opposite sides of the second clamping block 655 each have two guide holes 6554 and an inlet hole 6556, with the inlet hole 6556 located between the two guide holes 6554 on that side. A second clamping groove 6558 is defined in the middle of the inner wall of the second clamping block 655 to accommodate the outer wall of the movable block 653.

[0084] The movable block 653 is cylindrical, and the proximal end of the pusher 682 is fixed to the middle portion of the movable block 653. Specifically, a fixing hole 6532 is defined axially in the middle portion of the distal end surface of the movable block 653, and the proximal end of the pusher 682 is fixed within the fixing hole 6552. The end surface of the movable block 653 defines two through-holes 6534 on opposite sides of the fixing hole 6552. Each through-hole 6534 extends axially through the proximal and distal ends of the movable block 653. The outer wall of the movable block 653 defines a plurality of welding holes 6535 that communicate with the fixing holes 6552. The pusher 682 is secured to the movable block 653 by adding solder to the welding holes 6535.

[0085] An elastic member 658 is provided between the first clamping block 654 and the second clamping block 655. The elastic member 658 can force the first clamping block 654 to move away from the second clamping block 655. Preferably, the elastic member 658 is a spring sleeved outside the guide slide 6546.

[0086] A recess 6561 is provided in the middle of the outer wall of button 656. Several anti-slip strips 6563 are provided on the surface of recess 6561, allowing fingers to be inserted into recess 6561 for easy operation of button 656. Connecting blocks 6564 are provided on opposite ends of the side of button 656 facing away from recess 6561. Each connecting block 6564 has a connecting hole 6566 defined on the side facing away from recess 6561. The two connecting holes 6566 correspond to the two connecting posts 6545 of the first clamping block 654.

[0087] In other embodiments, the button 656 may also be directly disposed on the sliding member 650 . Furthermore, the first clamping block 654 is provided with a button passing through the strip-shaped opening 6116 .

[0088] The first rotating mechanism 66 includes a first rotating member 662 fixed to the guide rail 651 and a rotating post 664 rotatably disposed within the housing 61 along the axis of the push member 682. Specifically, the first rotating mechanism 66 is fixedly connected to the proximal end of the guide rail 651, and the rotating post 664 is fixedly connected to the distal end of the guide rail 651. The axis of the guide rail 651 is spaced parallel to the axis of the push member 682. The first rotating member 662 is rotatably disposed within the proximal end of the housing 61 along the axis of the push member 682. Rotation of the first rotating member 662 drives the movable block 653 and the rotating post 664 to rotate via the guide rail 651, thereby rotating the push member 682.

[0089] Specifically, the first rotating member 662 includes a handle portion 6621 and a rotating rod 6623 protruding from the middle portion of the distal end of the handle portion 6621. The rotating rod 6623 is cylindrical, and two annular guide grooves 6625 are defined along its circumference on its outer wall. The two guide grooves 6625 correspond to the annular support piece formed by the third support piece 6115 of the first housing 611 and the sixth support piece 6135 of the second housing 613. The axes of the two guide grooves 6625 coincide with the axis of the first rotating member 662, allowing the first rotating member 662 to rotate along the guide grooves 6625. The end surface of the rotating rod 6623 facing away from the handle portion 6621 defines two spaced apart fixing holes 6626. The axes of the two fixing holes 6626 do not coincide with the axis of the rotating rod 6623. The proximal ends of the two guide rails 651 are respectively fixed in the two fixing holes 6626. A plurality of anti-slip grooves 6627 are provided on the outer wall of the handle portion 6621 to facilitate the rotation of the first rotating member 662 .

[0090] The rotating column 664 is cylindrical, with a guide groove 6642 defined along its circumference on its outer wall. This guide groove 6642 corresponds to the annular support plate formed by the second support plate 6113 of the first housing 611 and the fifth support plate 6133 of the second housing 613. The rotating column 664 is capable of rotating along the guide groove 6642. A through hole 6643 is defined axially in the middle of the rotating column 664, extending through its proximal and distal surfaces. The pusher 682 can movably pass through the through hole 6643. The axis of the through hole 6643 coincides with the axis of the guide groove 6642. The proximal surface of the rotating column 664 defines two fixing holes 6646 on opposite sides of the through hole 6643. The distal ends of the two guide rails 651 are secured to the two fixing holes 6646, respectively.

[0091] The second rotating member 670 is rotatably disposed at the distal end of the housing 61 along the axis of the push member 682. The second rotating member 670 is cylindrical, and a through hole 6701 is axially defined in the middle of the second rotating member 670. The proximal end of the push tube 684 can be fixed in the through hole 6701, and the push member 682 can move through the through hole 6701. The axis of the through hole 6701 coincides with the axis of the push tube 684, and the axis of the second rotating member 670 also coincides with the axis of the through hole 6701.

[0092] Specifically, the second rotating member 670 includes a cylindrical operating portion 6702, a rotating portion 6704 protruding from the middle of the proximal end surface of the operating portion 6702, and an annular protrusion 6705 protruding from the distal end surface of the operating portion 6702. The outer wall of the operating portion 6702 is provided with anti-slip strips, which facilitate finger rotation of the second rotating member 670. The rotating portion 6704 is cylindrical, and the outer wall of the rotating portion 6704 defines two annular guide grooves 6706 along its circumference. The two guide grooves 6706 correspond to the annular support piece formed by the first support piece 6112 of the first housing 611 and the fourth support piece 6132 of the second housing 613. The axis of the two guide grooves 6706 coincides with the axis of the through hole 6701, allowing the second rotating member 670 to rotate along the guide grooves 6706. The axis of the annular protrusion 6705 coincides with the axis of the through hole 6701. The annular protrusion 6705 is provided with two opposing hooks 6707 along its radial direction. The two hooks 6707 correspond to the two latching blocks 6164 of the cap body 6160. The inner wall of the proximal end of the through hole 6701 is provided with an internal thread 6708, and the outer wall of the proximal end of the push tube 684 is provided with an external thread corresponding to the internal thread 6708.

[0093] Please also refer to Figures 10 to 33When assembling the pushing device 60, the proximal end of the pushing member 682 is movably passed through the through hole 6643 of the rotating column 664 and then fixed in the fixing hole 6532 of the movable block 653. The two guide rails 651 are slidably passed through the two through holes 6534 of the movable block 653, and the distal ends of the two guide rails 651 are respectively fixed in the two fixing holes 6646 of the rotating column 664. The proximal ends of the two guide rails 651 are respectively fixed in the two fixing holes 6626 of the first rotating member 662. The movable block 653 is slidably provided in the guide rails 651 and is located between the first rotating member 662 and the rotating column 664. The elastic members 658 are respectively fitted on the guide rails 6546. The movable block 653 is placed between the first clamping block 654 and the second clamping block 655. The first clamping block 654 is covered with the second clamping block. 655, the movable part 653 can be movably clamped in the receiving space surrounded by the first clamping groove 6548 of the first clamping block 654 and the second clamping groove 6558 of the second clamping block 655, the guide slide column 6546 can be slidably inserted into the corresponding guide slide hole 6554, and the elastic part 658 elastically presses between the first clamping block 654 and the second clamping block 655. The first clamping block 654 is close to the second clamping block 655 so that the guide slide plate 6547 extends into the introduction hole 6556 for engagement and can drive the second clamping block 655 to slide; the outer wall of the guide slide plate 6547 abuts the inner circumference of the introduction hole 6556, and there is no gap between the guide slide plate 6547 and the introduction hole 6556, which can prevent the first clamping block 655 from displacing in the axial direction relative to the second clamping block 655, so that the movable block 653 can be driven to the appropriate position and positioned more conveniently and accurately. Place the two guide rails 651 between the first housing 611 and the second housing 613, with the connecting post 6545 of the first clamping block 654 facing the strip-shaped opening 6116 of the first housing 611. Insert the second support piece 6113 of the first housing 611 into the guide slot 6642 of the rotating post 664, and insert the two third support pieces 6115 into the two guide slots 6625 of the first rotating member 662. At this point, the slider 6542 and connecting post 6545 are both inserted into the strip-shaped opening 6116, allowing the slider 6542 to slide axially along the strip-shaped opening 6116. The two latching teeth 6544 of the first clamping block 654 correspond to the two racks 6117, respectively. Slide the two connecting blocks 6564 of the button 656 onto the two connecting posts 6545, exposing the recess 6561 of the button 656 outside the first housing 611, allowing the button 656 to slide along the strip-shaped opening 6116.

[0094] Sleeve the sleeve 6165 onto the distal end of the cap body 6160, specifically, snap-fit ​​the pair of protrusions 6167 of the sleeve 6165 onto the snap-fit ​​ring 6163 of the cap body 6160; snap-fit ​​the end cover 616 onto the distal end of the second rotating member 670, specifically, insert the annular protrusion 6705 into the annular groove 6162 of the cap body 6160, and snap-fit ​​the two hooks 6707 onto the two clamping blocks 6164 respectively, so that the end cover 616 is fixed to the second rotating member 670, and the axial center line of the through hole 6161 of the end cover 616 coincides with the axial center line of the through hole 6701 of the second rotating member 670. In other embodiments, the hook 6707 of the second rotatable member 670 and the block 6164 of the cap 6160 can be omitted, and the annular tab 6705 of the second rotatable member 670 can be rotatably inserted into the annular groove 6162 of the cap 6160, so that the end cap 616 is rotatably connected to the distal end of the second rotatable member 670. The proximal end of the push tube 684 is passed through the through hole 6161 of the end cap 616 and then fixed to the through hole 6701 of the second rotatable member 670. Specifically, the external thread of the push tube 684 is screwed to the internal thread 6708 of the second rotatable member 670. In other embodiments, the proximal end of the push tube 684 can be fixed to the through hole 6161 by welding, gluing, or clamping.

[0095] Pass the distal end of the pushing member 682 from the proximal end of the second rotating member 670 through the through hole 6701 and the pushing tube 684, so that the second rotating member 670 slides to the distal end of the first shell 611, and insert the two first support plates 6112 of the first shell 611 into the two guide grooves 6706 of the second rotating member 670 respectively; connect the second shell 613 to the first shell 611, and the snap hooks 6131 of the second shell 613 are respectively snapped into the snap plates 6118 of the first shell 611. At this point, the two fourth support pieces 6132 of the second housing 613 are respectively inserted into the two guide slots 6706 of the second rotating member 670, the fifth support piece 6133 is received in the guide slot 6642 of the rotating post 664, the two sixth support pieces 6135 are respectively inserted into the two guide slots 6625 of the first rotating member 662, and the two guide rails 6136 are respectively received in the two guide slots 6552 of the second clamping block 655. The elastic member 658 pushes the teeth 6544 of the first clamping block 654 to engage with the rack 6117, and the operating portion 6702 of the second rotating member 670 is exposed from the housing 61. The external buckle plate 615 is then snapped into the mounting opening 6138 of the second housing 613. Specifically, the positioning posts 6151 of the external buckle plate 615 are snapped into the corresponding locking holes of the positioning blocks 6137, and the hooks 6153 are snapped into the corresponding locking holes 6139, completing the installation.

[0096] When the pushing device is used, the button 656 is pressed to move the first clamping block 654 toward the second clamping block 655, and the elastic member 658 is elastically deformed until the movable block 653 is clamped and positioned by the first clamping block 654 and the second clamping block 655. The latching teeth 6544 of the first clamping block 654 are separated from the rack 6117, and the button 656 is slid toward the proximal or distal end along the strip-shaped opening 6116 of the first housing 611, so that the movable block 653 slides toward the proximal or distal end along with the first clamping block 654 and the second clamping block 655. When the push member 682 slides to a suitable position, the button 656 is pressed, and the elastic member 658 elastically resets to push the first clamping block 654 away from the second clamping block 655, until the tooth 6544 of the first clamping block 654 is engaged with the rack 6117, positioning the sliding member 650 to prevent the movable block 653 from sliding in the axial direction, thereby axially positioning the push member 682. When it is necessary to rotate the push member 682, the button 656 is released, causing the first clamping block 654 to move away from the second clamping block 655, and rotating the first rotating member 662, thereby driving the guide rail 651, the movable block 653, and the rotating column 664 to rotate. That is, the movable member 653 can rotate along the axis of the push member 682 within the space enclosed by the first clamping groove 6548 of the first clamping block 654 and the second clamping groove 6558 of the second clamping block 655, thereby driving the push member 682 to rotate relative to the push tube 684. When it is necessary to rotate the push tube 684, the operating portion 6702 of the second rotating member 670 is rotated to rotate the second rotating member 670 along the axis of the push member 682. Since the proximal end of the push tube 684 is fixed in the through hole 6701 of the second rotating member 670, the push tube 684 rotates with the second rotating member 670.

[0097] The sliding mechanism 65 of the pushing device 60 can drive the pushing member 682 to slide axially, thereby facilitating the change of the position of the occluder fixed to the distal end of the pushing member 682 in the blood vessel, and can control the release speed of the occluder. When the pushing member 682 transports the occluder to a suitable position, the button 656 is released, and the first clamping block 654 moves toward the first shell 611 under the reset force of the elastic member 658, so that the locking tooth 6544 engages with the rack 6117 to achieve the positioning of the pushing member 682 and the occluder. Therefore, the sliding mechanism 65 can conveniently and reliably move and position the occluder.

[0098] During interventional surgery, the occluder locking system first determines the puncture position and completes the puncture. Then, the distal end of the expansion rod 32 of the dilator 30 is passed through the proximal end of the sheath adjustable bending device 20 and inserted into the sheath 23 and exposed at the distal end of the sheath 23. Since the distal end of the dilator 30 is a cone-like structure with a gradually decreasing diameter, under the imaging effect of the imaging instrument, the surgeon can easily guide the sheath to the vicinity of the lesion with the help of the distal structure of the dilator 30. After reaching the vicinity of the lesion, the dilator 30 is withdrawn, leaving the sheath 23 in the body to establish a channel from the outside to the inside of the body; the distal end of the pushing assembly 68 of the pushing device 60 passes through the sealing seat 44 of the loader 40 and the loading tube 42, and then the distal ends of the pushing member 682 and the distal ends of the pushing tube 684 are matched and fixed to the occluder 10 in a detachable manner at the same time, and the relative positions of the pushing member 682 and the pushing tube 684 are changed to stretch the occluder 10 in the axial direction, and the pushing assembly 68 is moved proximally to allow the guide sliding structure 111 of the occluder 10 to be inserted into the loading tube 42, so as to facilitate the occluder 10 to be inserted into the loading tube 42. 0 is easily received into the inner cavity of the loading tube 42 of the loader 40; the distal end of the loading tube 42 is inserted into the sheath tube 23 to obtain a delivery system loaded with the occluder 10; the housing 61 of the pushing device 60 is grasped and the pushing assembly 68 is pushed distally to deliver the occluder 10 to the distal end port of the sheath tube 23 of the sheath tube adjustable bending device 20; the sheath tube adjustable bending device 20 and the bending sheath tube 23 are rotated so that the distal end of the sheath tube 23 is directly facing the rupture at the lesion location, and the button 656 of the delivery device 60 is slowly pushed to move the pushing assembly 68 toward the rupture. The occluder 10 is exposed from the sheath 23 and released to the appropriate position of the rupture. The button 656 of the sliding delivery device 60 causes the pusher 682 to slowly move axially toward the proximal end, so that the proximal occluding portion 11 and the distal occluding portion 15 of the occluder 10 are located at both ends of the rupture. Under the action of the sliding mechanism 65, the first rotating mechanism 66, and the second rotating mechanism 670 of the delivery device 60, the occluder 10 is locked to the rupture and the pusher 682 and the pusher tube 684 are separated from the occluder 10. At this time, the first clamping shoulder 116 of the proximal occluding portion 11 and the second clamping shoulder 156 of the distal occluding portion 15 effectively clamp the tissue around the rupture, which is more conducive to the endothelialization of the occluder.

[0099] The above is an implementation of the embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An occluder, comprising a proximal occluding portion, characterized in that: A first tightening member is provided at the proximal end of the proximal sealing portion, the first tightening member comprising an inner sleeve disposed at the proximal end of the proximal sealing portion and a protruding portion fixed to the inner sleeve, the protruding portion axially extending a through hole, an outer wall of the protruding portion being provided with an external thread, the outer thread of the protruding portion being used to correspond to the inner thread of the inner wall of the distal end of the push tube, a nut being provided inside the distal end of the push tube; a conical guide sliding structure is provided on the outer periphery of the first tightening member of the proximal sealing portion, the inner diameter of the guide sliding structure gradually decreasing from the distal end to the proximal end; The occluder also includes a distal sealing portion, which is a structure woven from metal wires and has an internal space. The distal sealing portion also includes an external sleeve and a connecting bolt connected to the external sleeve. The outer wall of the proximal end of the connecting bolt is provided with an external thread. The connecting bolt can pass through the through hole and be screwed to the nut. The thread direction of the external thread of the connecting bolt is opposite to the thread direction of the external thread of the protrusion, so that when the connecting bolt is screwed to the nut, the protrusion is separated from the push tube, and when the connecting bolt is separated from the nut, the protrusion is screwed to the push tube.

2. The occluder according to claim 1, characterized in that: The occluder also includes a waist portion arranged between the proximal sealing portion and the distal sealing portion, the proximal sealing portion includes a first annular groove connected to the waist and recessed toward the proximal end, and a first side wall connected to the outer edge of the first annular groove, the first side wall extends obliquely from the first annular groove toward the proximal end for a length and then bends and extends obliquely toward the distal end to connect to the distal end of the guide sliding structure, the first side wall and the guide sliding structure form an annular valley recessed toward the distal end, and the first side wall and the first annular groove form a first clamping shoulder.

3. The occluder according to claim 2, characterized in that: The proximal sealing portion is a structure woven from metal wires with an internal space. The metal wires woven into the first annular groove first extend toward the proximal end at an angle of 30-45 degrees to the axial direction to form the first side wall, and then fold back toward the distal end to form the annular valley.

4. The occluder according to claim 2, characterized in that: The distal sealing portion includes a second annular groove connected to the waist and recessed toward the distal end, and a second side wall connected to the outer edge of the second annular groove. The second side wall extends obliquely from the second annular groove toward the distal end and converges at the distal end of the distal sealing portion. The second side wall and the second annular groove form a second clamping shoulder, and the second clamping shoulder is arranged opposite to the first clamping shoulder.

5. The occluder according to claim 4, characterized in that: The distal sealing portion also includes a second tightening piece arranged at the distal end. The metal wire woven into the second annular groove first extends toward the distal end close to the second tightening piece at an angle of 30 degrees to 45 degrees to the axial direction to form the second side wall. The metal wire then approaches the second tightening piece and is fixed to the second tightening piece.

6. The occluder according to claim 4, characterized in that: The first annular groove and the second annular groove are arranged at the proximal end and the distal end of the waist opposite to each other.

7. The occluder according to claim 3, characterized in that: The proximal ends of the metal wires converge and are positioned between the inner sleeve and the protrusion.

8. The occluder according to claim 7, characterized in that: The distal ends of the metal wires converge and are positioned between the external sleeve and the connecting bolt, and the connecting bolt extends toward the proximal end.

9. The occluder according to claim 8, characterized in that: A convex disc is provided in the radial direction on one end of the connecting bolt close to the external sleeve, and the outer diameter of the convex disc is greater than the inner diameter of the through hole.

10. An occluder locking system, characterized in that: It comprises a sheath bending device, a loader, a pushing device and the occluder according to any one of claims 1 to 9, wherein the sheath bending device comprises a sheath, the loader comprises a loading tube, the distal end of the loading tube is inserted into the sheath, and the pushing device comprises a pushing combination, which can retract the occluder into the sheath.

Images