A stent system

Abstract

This invention relates to a stent system comprising a tubular stent and a delivery device. The stent includes a pull wire and a release wire. The delivery device includes a release wire adjustment assembly and a pull wire adjustment assembly disposed on opposite sides of the proximal end of the delivery device. The distal end of the pull wire includes a collar structure and wraps around the inner circumference of the stent at least once. The proximal end of the pull wire passes through the proximal end of the stent and connects to the pull wire adjustment assembly. The distal end of the release wire passes through the collar structure and passes through the proximal end of the stent and connects to the release wire adjustment assembly. This invention, through the arrangement of the release wire adjustment assembly and the pull wire adjustment assembly, allows the stent to be radially retracted and repositioned after deployment within the blood vessel, thereby precisely deploying the stent at the target location and avoiding risks such as endoleak, displacement, and failure.

Description

Technical Field

[0001] This invention relates to the field of interventional medicine, and more specifically to a stent system. Background Technology

[0002] Aortic dissection, aortic ulcer, aortic aneurysm, etc. are a class of dangerous, rapidly progressing, and high-mortality vascular diseases. They are caused by localized lesions in the aortic wall, which continue to worsen under the continuous impact of blood flow, leading to catastrophic consequences.

[0003] Depending on the location and extent of the lesion, treatment options include surgery and endovascular intervention. Among these, endovascular intervention, with its minimally invasive nature, rapid recovery, and good efficacy, has become the preferred treatment option for lesions confined to the descending aorta. The endovascular stent is delivered to the lesion via a delivery system. The stent is then released and adheres to the vessel wall. The endovascular stent covers the lesion, preventing blood flow from reaching the lesion site and thus avoiding continuous impact from the blood flow, thereby achieving a therapeutic effect.

[0004] However, existing covered stent systems present the following problems during physician operation: During stent deployment, the physician first releases the distal end of the stent to initially anchor it within the blood vessel. This process requires accurate judgment of the stent's placement. If the intended location is not reached during deployment, endoleak or stent displacement may occur, potentially leading to complete stent failure. Furthermore, the shape of human blood vessels is complex, and patients' vascular conditions vary, thus demanding a high level of experience and expertise from the physician. If the stent's position needs to be readjusted to achieve the desired location, there is a risk of scratching the blood vessel due to the stent's adherence to the vessel wall after deployment. Summary of the Invention

[0005] To overcome the problems existing in the prior art, the present invention provides a support system.

[0006] The present invention provides a support system that solves the technical problem by providing a support system comprising a tubular support and a conveyor. The support includes a pull wire and a release wire. The conveyor includes a release wire adjustment assembly and a pull wire adjustment assembly disposed on the proximal side of the conveyor. The distal side of the pull wire includes a collar structure. The pull wire wraps around the inner circumference of the support at least once. The proximal side of the pull wire passes through the proximal end of the support and is connected to the pull wire adjustment assembly. Part of the pull wire adjustment assembly rotates, thereby driving the pull wire to move. The distal side of the release wire passes through the collar structure and is connected to the collar structure. The proximal side of the release wire passes through the proximal end of the support and is connected to the release wire adjustment assembly.

[0007] In some embodiments of the present invention, the release wire adjustment assembly includes a first side branch and a first disassembly component, the conveyor includes a rear handle, the distal end of the first side branch is connected to the rear handle, the proximal end of the release wire enters the first side branch after passing through the rear handle, and then passes through the first disassembly component and exits from the proximal end of the first side branch. A first mating hole is provided on the outer wall of the first side branch, and the first disassembly component mates with the first mating hole, so that the release wire can be connected to or separated from the first side branch.

[0008] In some embodiments of the present invention, the wire adjustment assembly includes a second side support, a second disassembly component, and a rotating component; the conveyor includes a rear handle; the distal end of the second side support is connected to the rear handle; the proximal end of the second side support is connected to the distal end of the second disassembly component; the distal end of the rotating component is rotatably connected to the proximal end of the second disassembly component; the proximal end of the wire passes through the rear handle and enters the second side support and is fixed inside the rotating component.

[0009] In some embodiments of the present invention, the wire adjustment assembly further includes a guide structure, the guide structure including a guide rail, a guide rail fixing member, an end cap, and a slider. The guide rail fixing member is disposed between the second side support and the rotating member. The distal end of the guide rail is fixed to the guide rail fixing member. The distal end of the end cap is rotatably connected to the proximal end of the rotating member. The proximal end of the guide rail is connected to the end cap. The slider is disposed on the guide rail and can move along the guide rail. The proximal end of the wire is connected to the slider.

[0010] In some embodiments of the present invention, the inner wall of the rotating member is provided with an internal thread, and the outer surface of the slider is provided with an external thread. The external thread of the slider is threadedly connected to the internal thread of the rotating member. When the rotating member is rotated, the rotating member drives the slider to move axially along the guide rail, thereby driving the wire to move.

[0011] In some embodiments of the present invention, the slider has a protrusion on its proximal end face to form a mounting portion, and the guide structure further includes a pulley mounted on the mounting portion. The pull wire passes through the guide rail fixing member from the proximal end, passes through the slider, and wraps around one side of the pulley to the other side of the pulley. Then it passes through the slider from the distal end and is fixed to the guide rail fixing member.

[0012] In some embodiments of the present invention, the wire adjustment assembly includes a second side support, a housing, and a control component. The conveyor includes a rear handle. The distal end of the second side support is connected to the rear handle. The proximal end of the second side support is detachably connected to the distal end of the housing. The distal end of the control component is housed within the housing and is rotatable relative to the housing. The proximal end of the wire passes through the rear handle, enters the second side support, and then enters the housing before connecting with the control component.

[0013] In some embodiments of the present invention, the control element includes a control element body disposed on the distal side and a rotating part disposed on the proximal side of the control element body. The control element body is housed within the housing, and the rotating part is exposed outside the housing. A threading hole is provided on the inner wall of the distal end of the housing. The proximal end of the pull wire passes through the threading hole and connects to the control element body. Rotating the rotating part can cause the proximal end of the pull wire to coil around the outer surface of the control element body.

[0014] In some embodiments of the present invention, the control component body is provided with a plurality of first locking structures, the plurality of first locking structures being evenly spaced on the outer surface of the control component body in the circumferential direction, and the proximal end of the first locking structure being provided with a first inclined structure; the inner side of the proximal end of the housing is provided with a first limiting structure, and the distal end of the first limiting structure is provided with a second inclined structure; when the control component moves toward the proximal end, the first limiting structure can enter the gap between two adjacent first locking structures.

[0015] In some embodiments of the present invention, a second locking structure is provided on the outer surface of the control component body. The second locking structure is located on the proximal side of the first locking structure. A third inclined structure is provided at the proximal end of the second locking structure. A through hole is provided at the proximal end of the housing for the control component body to pass through. A second limiting structure is formed by protruding inward on the inner sidewall of the through hole. A fourth inclined structure is provided at the distal end of the second limiting structure. When the control component moves towards the proximal end, the second locking structure passes through the second limiting structure and is located on the proximal side of the second limiting structure.

[0016] In some embodiments of the present invention, the control element further includes a torsion spring, the distal end of which is connected to the inner wall of the distal end of the housing, and the proximal end of which is connected to the distal side of the control element body.

[0017] Compared with existing technologies, the stent system of the present invention has the following advantages: By incorporating a pull wire, a release wire, a pull wire adjustment assembly, and a release wire adjustment assembly, the present invention allows the stent to be radially retracted and its position readjusted after release within the blood vessel, thereby precisely releasing the stent to the target location and avoiding risks such as endoleak, displacement, and failure. This reduces the difficulty of the procedure, increases the margin of error during surgery, and also prevents the stent from scratching the blood vessel wall. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the support structure provided in the first embodiment of the present invention.

[0019] Figure 2 This is a perspective view of the bracket structure provided in the first embodiment of the present invention.

[0020] Figure 3 This is a perspective view of the stent in its contracted state provided in the first embodiment of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the pull wire and release wire of the bracket provided in the first embodiment of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the pull wire and release wire of the bracket provided in the first embodiment of the present invention from another angle.

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the support provided in the first embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the fixing part of the bracket provided in the first embodiment of the present invention.

[0025] Figure 8A This is a schematic diagram of the structure of the bracket provided in the first embodiment of the present invention, which has a first branch bracket and a second branch bracket.

[0026] Figure 8B This is a structural schematic diagram of the bare stent restraint state of the stent provided in the first embodiment of the present invention.

[0027] Figure 8C This is a schematic diagram of the structure of the adjustable support when the bare support is in a restrained state, as provided in the first embodiment of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the conveyor of the support system provided in the second embodiment of the present invention.

[0029] Figure 10 This is a three-dimensional structural diagram of the release wire adjustment assembly and the pull wire adjustment assembly of the support system provided in the second embodiment of the present invention.

[0030] Figure 11 This is a perspective structural schematic diagram of the release wire adjustment component of the support system provided in the second embodiment of the present invention.

[0031] Figure 12 This is a cross-sectional view of the wire adjustment assembly of the support system provided in the second embodiment of the present invention along the axial direction.

[0032] Figure 13 This is a partial structural schematic diagram of the conveyor of the support system provided in the third embodiment of the present invention.

[0033] Figure 14 This is an exploded structural diagram of the release wire adjustment assembly of the support system provided in the third embodiment of the present invention.

[0034] Figure 15 This is a schematic cross-sectional view of the release wire adjustment assembly of the support system provided in the third embodiment of the present invention along the axial direction.

[0035] Figure 16 This is a schematic cross-sectional view of the wire adjustment assembly of the support system provided in the third embodiment of the present invention along the axial direction.

[0036] Figure 17 This is an exploded cross-sectional view of the wire adjustment assembly of the support system provided in the third embodiment of the present invention along the axial direction.

[0037] Figure 18 This is a schematic diagram of the conveyor section of the support system provided in the fourth embodiment of the present invention.

[0038] Figure 19 This is an exploded structural diagram of the release wire adjustment assembly of the support system provided in the fourth embodiment of the present invention.

[0039] Figure 20 This is a cross-sectional exploded view of the release wire adjustment assembly of the support system provided in the fourth embodiment of the present invention along the axial direction.

[0040] Figure 21 This is a schematic cross-sectional view of the wire adjustment assembly of the support system provided in the fourth embodiment of the present invention along the axial direction.

[0041] Figure 22 This is a partial structural schematic diagram of the guide structure of the support system provided in the fifth embodiment of the present invention.

[0042] Figure 23 This is a partial structural diagram of the guide structure of the support system provided in the fifth embodiment of the present invention from another angle.

[0043] Figure 24This is a schematic diagram of the internal structure of the drawer wire adjustment assembly of the bracket system provided in the sixth embodiment of the present invention.

[0044] Figure 25 This is an exploded structural diagram of the wire adjustment assembly of the support system provided in the sixth embodiment of the present invention.

[0045] Figure 26 yes Figure 25 Enlarged view of point A in the middle.

[0046] Figure 27 yes Figure 25 Enlarged view of section B in the middle.

[0047] Figure 28 This is a schematic diagram of the internal structure of the pull wire adjustment assembly with torsion spring in the bracket system provided in the sixth embodiment of the present invention.

[0048] Figure 29 This is a schematic cross-sectional view of the wire adjustment assembly of the support system provided in the seventh embodiment of the present invention along the axial direction.

[0049] Figure 30 This is a schematic cross-sectional view of the axial direction of the release wire adjustment assembly and the draw wire adjustment assembly of the support system provided in the eighth embodiment of the present invention.

[0050] Figure 31 This is a cross-sectional view of the axial structure of the release wire adjustment assembly and the draw wire adjustment assembly of the support system provided in the ninth embodiment of the present invention.

[0051] Explanation of reference numerals in the attached diagram: 1. Bracket; 11. Annular corrugated coil; 12. Coating; 13. Pull wire; 14. Release wire; 15. End corrugated coil; 16. Bare bracket; 17. Main bracket; 18. First branch bracket; 19. Second branch bracket; 10. Connector; 111. First corrugated coil; 112. Second corrugated coil; 121. Wire buckle; 122. Fixing part; 1221. First fixing part; 1222. Second fixing part; 131. Loop structure; 132. Annular structure; 2. Conveyor; 21. Sheath assembly; 22. Sheath adjustment assembly; 23. Sheath core adjustment assembly; 24. Release wire adjustment assembly; 25. Pull wire adjustment assembly; 26. Rear handle; 221. Slide rod; 222. Fixed handle; 223. Sliding handle 231. Sheath core; 232. Locking component; 241. First side support; 2411. First mating hole; 242. First disassembly component; 251. Second side support; 252. Second disassembly component; 3. Conveyor; 34. Release wire adjustment assembly; 35. Pull wire adjustment assembly; 341. First side support; 3411. External thread; 342. First disassembly component; 343. Presser; 351. Second side support; 3511. Guide part; 352. Second disassembly component; 3521. Internal thread; 353. Connector; 3531. External thread; 3532. Snap-fit ​​part; 3533. Track; 354. Guide structure; 3431. Straight tube structure; 3432. Large diameter part; 3433. Through groove; 3421. Hollow cavity; 3422 3423. Internal thread; 3541. Beveled structure; 3542. Guide screw; 3543. Guide snap-fit ​​part; 3544. Knob; 3545. Slider; 3546. Sliding part; 4. Conveyor; 441. First side support; 442. First disassembly part; 443. Presser; 44. Release wire adjustment assembly; 45. Pull wire adjustment assembly; 444. Screw; 445. Locking part; 451. Second side support; 452. Second disassembly part; 453. Rotating part; 454. Guide structure; 4541. Guide rail; 4542. Guide rail fixing part; 4543. End cap; 4544. Slider; 4422. Internal thread; 4423. Beveled structure; 4451. External thread; 4431. Straight tube structure; 4 432. Large diameter section; 55. Wire adjustment assembly; 553. Rotating component; 554. Guide structure; 5541. Guide rail; 5542. Guide rail fixing component; 5544. Slider; 5545. Mounting part; 5546. Pulley; 555. Take-up reel; 65. Wire adjustment assembly; 651. Second side support; 652. Housing; 653. Control component; 656. Torsion spring; 6531. Control component body; 6530. Rotating part; 6521. Wire hole; 6522. First limiting structure; 6523. Second inclined surface structure; 6524. Through hole; 6532. First locking structure; 6533. First inclined surface structure; 6534. Second locking structure; 6535. Third inclined surface structure; 6525. Second limiting structure;6526. Fourth inclined plane structure; 75. Wire adjustment assembly; 751. Second side support; 752. Housing; 7521. Grip part; 753. Control component; 7531. Control component body; 7532. Extension part; 7533. Rotating part; 754. Second disassembly part; 755. Locking part; 84. Wire release adjustment assembly; 842. First disassembly part; 8422. Internal thread; 843. Pressure gripper; 8431. Straight tube structure; 85. Wire adjustment assembly; 851. Second side support; 852. Second disassembly part; 853. Rotating part; 8531 8531. Control component body; 8532. Extension; 8533. Rotating part; 854. Guide structure; 8543. End cap; 8544. Fitting part; 94. Release wire adjustment assembly; 95. Pull wire adjustment assembly; 951. Second side support; 952. Housing; 953. Control component; 9531. Control component body; 9532. Extension; 9533. Rotating part; 954. Second disassembly component; 955. Locking component; 941. First side support; 942. First disassembly component; 943. Pressure gripper; 9521. First threading hole; 9522. Second threading hole. Detailed Implementation

[0052] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0053] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0054] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0055] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0056] To more clearly describe the structure of this application, the terms "proximal" and "distal" are used herein as conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, "proximal" refers to the end closest to the operator during the surgical procedure, "axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial".

[0057] Please see Figure 1 and Figure 2The first embodiment of the present invention provides a stent 1, which is a self-expanding tubular structure. The stent 1 is delivered to the lesion site via a delivery device, and the stent 1 can self-expand within the blood vessel. The stent 1 includes multiple annular coils 11, a covering 12, a pull wire 13, and a release wire 14. The multiple annular coils 11 are coaxially spaced, and the covering 12 is disposed on the multiple annular coils 11. The distal end of the pull wire 13 includes a collar structure 131, and the distal end of the pull wire 13 forms an annular structure 132 by wrapping at least one turn around the inner circumference of the covering 12. The proximal end of the pull wire 13 passes through the proximal end of the stent 1 and is connected to the delivery device. The distal end of the release wire 14 passes through the collar structure 131, and the release wire 14 passes through the proximal end of the stent 1 and is connected to the delivery device. The release wire 14 is used to fix the pull wire 13, and the pull wire 13 is used to contract the stent 1. Because the distal end of the pull wire 13 is arranged in at least one loop around the inner side of the bracket to form a ring structure 132, and because the release wire 14 passes through the collar structure 131, when the proximal end of the pull wire 13 is pulled, the collar structure 131 and the release wire 14 remain relatively stationary. The ring structure 132 contracts towards the collar structure 131 with the collar structure 131 as the center point, thereby causing the bracket 1 to contract. Figure 3 As shown. At this point, the stent 1 is not adhered to the blood vessel wall. The position of the stent 1 can be readjusted to align it with the target location within the blood vessel. Then, the pull wire 13 is released, and the stent 1 re-expands and adheres to the blood vessel wall. After the stent 1 is released in the correct position, the release wire 14 can be pulled proximally to separate it from the collar structure 131, and then withdrawn from the body. Once the release wire 14 is separated from the collar structure 131, the pull wire 13 is no longer restricted, and it can then be moved proximally and withdrawn from the body.

[0058] Please see Figure 4 In the first embodiment of the present invention, the pull wire 13 is a single wire folded in half to form a loop structure 131 at one end and two free ends of the pull wire 13 at the other end. This structure eliminates the need for a separate connection between the loop structure 131 and the pull wire 13. Furthermore, folding the pull wire 13 in half increases its overall strength, preventing it from breaking when pulled. Further, please refer to... Figure 4 and Figure 5To ensure the uniformity of the contraction of the annular structure 132, the overall strength of the annular structure 132, and to reduce the force required for the contraction of the annular structure 132, the proximal end of the pull wire 13 passes from the distal end of the collar structure 131, simultaneously passing in the inner direction of the release wire 14, then crossing over the outer side of the collar structure 131 and exiting from the proximal end of the bracket 1. The inner direction of the release wire 14 is the side closer to the central axis of the bracket 1, and the outer side of the collar structure 131 is the side away from the central axis of the bracket 1. Through the above arrangement, the contact point between the collar structure 131 and the release wire 14 is cleverly utilized as a fulcrum, making the overall structure of the bracket 1 simpler, reducing manufacturing difficulty and cost, while also ensuring the stability of the bracket 1's quality. This also ensures that when the pull wire 13 moves towards the proximal end, the entire pull wire 13 will not move towards the proximal end, thereby ensuring that the annular structure 132 will not deflect relative to the circumferential direction of the support 1 when it contracts, and ensuring the uniformity of the annular structure 132 during contraction. Simultaneously, through the above-mentioned design, the projection of the annular structure 132 in the axial direction forms a complete annular structure, ensuring the overall strength of the annular structure 132 and reducing the force required for the annular structure 132 to contract.

[0059] Please see Figure 1 and Figure 6 The stent 1 further includes an end wave loop 15, which is disposed at the distal end of the stent 1 and inside the covering membrane 12. An annular wave loop 11 is disposed outside the covering membrane 12. In the first embodiment of the present invention, both the end wave loop 15 and the annular wave loop 11 are formed by wavy lines in a sinusoidal shape. The period and amplitude of the end wave loop 15 are smaller than those of the annular wave loop 11, giving the end wave loop 15 better support. Simultaneously, the end wave loop 15 being disposed inside the covering membrane 12 improves the adhesion between the covering membrane 12 and the vessel wall, and enhances the sealing performance of the stent 1. The annular wave loop 11 being disposed outside the covering membrane 12 facilitates suturing of the annular wave loop 11 onto the covering membrane 12, and also increases the friction between the stent 1 and the vessel wall, ensuring that the stent 1 is firmly anchored within the vessel. The film 12 is made of PET polyester fabric, and the annular corrugated ring 11 and the end corrugated ring 15 are sewn onto the film 12 by stitching. In other specific embodiments of the present invention, the end corrugated ring 15 and the annular corrugated ring 11 may be disposed on the inner or outer side of the film 12, depending on actual needs. For example, multiple annular corrugated rings 11 may be partially disposed on the inner side of the film 12 and partially disposed on the outer side of the film 12.

[0060] Please see Figure 6 In the first embodiment of the present invention, the annular wavering 11 includes a first wavering 111 axially adjacent to the end wavering 15. A plurality of thread loops 121 are provided on the inner side of the covering film 12 corresponding to the first wavering 111. The plurality of thread loops 121 are spaced apart circumferentially, and the distal end of the draw wire 13 passes through the plurality of thread loops 121 sequentially. The plurality of thread loops 121 are located on the inner side of the covering film 12 corresponding to the midpoint of the axial direction of the first wavering 111. The thread loops 121 can be metal rings sewn onto the inner side of the covering film 12, or they can be medical sutures forming a ring shape. The thread loops 121 serve to secure the annular structure 132 to the inner side of the covering film 12. Simultaneously, multiple thread loops 121 are positioned on the inner side of the covering 12 corresponding to the midpoint of the first wave coil 111's axial direction. This ensures that the first wave coil 111 can contract uniformly, preventing it from tilting relative to the central axis of the stent 1 during contraction. Secondly, when the stent 1 is released, its distal end is first released and anchored to the vessel wall. If the position of the stent 1 needs adjustment, the distal end must be contracted before adjustment. Therefore, positioning multiple thread loops 121 on the inner side of the covering 12 corresponding to the midpoint of the first wave coil 111's axial direction allows for contraction of the distal end of the stent 1, facilitating timely position adjustment. Furthermore, the contraction of the first wave coil 111 causes the end wave coil 15 and the adjacent annular wave coil 11 to contract, ensuring that more of the stent 1 participates in the contraction and that it does not adhere to the vessel wall after contraction, thus ensuring smooth position adjustment.

[0061] In other specific embodiments of the present invention, the wire buckle 121 may also be disposed in other positions. For example, the annular wavering 11 may also include a second wavering 112 disposed adjacent to the first wavering 111 and disposed on the proximal side of the first wavering 111. A plurality of wire buckles 121 are disposed on the inner side of the film 12 corresponding to the second wavering 112. The plurality of wire buckles 121 are spaced apart in the circumferential direction. The distal end of the draw wire 13 passes through the plurality of wire buckles 121 in sequence. The plurality of wire buckles 121 are disposed on the inner side of the film 12 corresponding to the midpoint of the axial direction of the second wavering 112. The wire buckle 121 may also be disposed on the annular wavering 11. For example, the first wavering 111 and / or the second wavering 112 are disposed on the inner side of the film 12, and the wire buckle 121 is cut out from the first wavering and / or the second wavering 112 by cutting. That is, the wire buckle 121 is integrally formed with the first wavering 111 and / or the second wavering 112. The wire buckle 121 can also be set on the first wave coil 111 and / or the second wave coil 112 by welding or sewing.

[0062] Please see Figure 5 - Figure 7The inner side of the film 12 is provided with at least two fixing portions 122 spaced apart axially. The at least two fixing portions 122 are coaxially arranged, and the distal end of the release wire 14 passes through at least two of the fixing portions 122. In the first embodiment of the present invention, there are two fixing portions 122. The fixing portion 122 closer to the distal end is the first fixing portion 1221, and the fixing portion 1222 located near the proximal end of the first fixing portion 1221 is the second fixing portion 1222. The first fixing portion 1221 and the second fixing portion 1222 are coaxially arranged. The collar structure 131 is disposed between the first fixing portion 1221 and the second fixing portion 1222. The distal end of the release wire 14 passes sequentially through the second fixing portion 1222, the collar structure 131, and the first fixing portion 1221, and is exposed at the distal end of the first fixing portion 1221. The fixing part 122 is used to fix the release wire 14, preventing the release wire 14 from moving radially, thereby enabling the release wire 14 to fix the pull wire 13. Furthermore, to ensure good support for the portion of the release wire 14 near the collar structure 131, and to ensure the release wire 14 fixes the pull wire 13, preventing the pull wire 13 from pulling or bending the release wire 14 when moving towards the proximal end, the distance between the first fixing part 1221 and the second fixing part 1222 is 10mm-20mm. Through the binding of the first fixing part 1221 and the second fixing part 1222, the release wire 14 between the first fixing part 1221 and the second fixing part 1222 has good support. Meanwhile, the distance between the first fixing part 1221 and the distal end of the bracket 1 is 5mm-10mm, so that the first fixing part 1221 is within the end corrugation 15, providing better support for the first fixing part 1221 and preventing the first fixing part 1221 from driving the covering film 12 to move relative to the end corrugation 15 toward the central axis of the bracket 1.

[0063] In the first embodiment of the present invention, the fixing part 122 further includes a third fixing part (not shown), which is disposed within the film 12 on the proximal side of the bracket 1. The third fixing part can be used to fix the pull wire 13 or the release wire 14, and the third fixing part can prevent the release wire 14 from tangling with the pull wire 13 when entering the bracket 1. Specifically, the third fixing part can be coaxially arranged with the first fixing part 1221 and the second fixing part 1222, so that the distal end of the release wire 14 passes through the third fixing part and enters the bracket 1. Subsequently, the distal end of the release wire 14 passes through the second fixing part 1222 and the first fixing part 1221 in sequence, at which time the pull wire 13 can enter the bracket 1. Since the release wire 14 has been limited by the fixing part 122, tangling with the release wire 14 when the pull wire 13 enters the bracket 1 can be avoided. Furthermore, the third fixing part can be disposed within the film 12 on the opposite side of the first fixing part 1221 and the second fixing part 1222, and the third fixing part can be distinguished from the first fixing part 1221 and the second fixing part 1222. That is, the distal end of the release wire 14 passes through the second fixing part 1222 and the first fixing part 1221 in sequence, and the distal end of the pull wire 13 passes through the third fixing part. Since the third fixing part is disposed on the opposite side of the first fixing part 1221 and the second fixing part 1222, it can prevent the pull wire 13 from getting tangled with the release wire 14 when it enters the bracket 1.

[0064] It should be noted that in the first embodiment of the present invention, the fixing part 122 is disposed on the inner side of the film 12, thereby placing the release wire 14 tightly against the inner side of the bracket 1. This is because when the pull wire 13 drives the bracket 1 to contract, the contraction occurs at the contraction point of the release wire 14, that is, the pull wire 13 will drive the bracket 1 to contract in the direction of the release wire 14, and the release wire 14 will be subjected to the force transmitted by the pull wire 13. By placing the release wire 14 on the inner side of the bracket 1, the inner sidewall of the bracket 1 can provide support for the release wire 14. The inner sidewall of the bracket 1 and the fixing part 122 together restrict the movement of the release wire 14, preventing the release wire 14 from axial movement or circumferential swaying due to the force transmitted by the pull wire 13. If the release wire 14 is positioned at the center of the bracket 1, when the release wire 14 is subjected to the force transmitted by the pull wire 13, the release wire 14 cannot obtain any support in the circumferential direction, and the release wire 14 is easily affected and moves.

[0065] Further, please refer to Figure 8AThe stent 1 of the first embodiment of the present invention is particularly suitable for treating subrenal abdominal aortic aneurysms. This is because the stent for treating subrenal abdominal aortic aneurysms needs to be accurately positioned along the lower edge of the renal artery. If it is positioned too high, it may block the renal artery; if it is positioned too low, it may cause endoleak. Therefore, the stent 1 also includes a bare stent 16, a main stent 17, a first bifurcation stent 18, and a second bifurcation stent 19. The proximal end of the bare stent 16 is connected to the distal end of the main stent 17, and the distal end of the main stent 17 is connected to the distal ends of the first bifurcation stent 18 and the second bifurcation stent 19. The covering 12 and the plurality of the annular coils 11 are disposed on the main stent 17, the first bifurcation stent 18, and the second bifurcation stent 19. The bare stent 16 is used to improve the anchoring force of the stent 1, ensuring that the stent 1 is firmly anchored in the blood vessel. The main stent 17 acts on the abdominal aorta, and the first bifurcation stent 18 and the second bifurcation stent 19 act on the right common iliac artery and the left common iliac artery, respectively. The bare bracket 16 extends outward in a direction away from the central axis of the bracket 1, and the angle between the bare bracket 16 and the central axis of the bracket 1 is 25°-45°, thereby increasing the anchoring performance of the bare bracket 16 and ensuring the anchoring performance of the bracket 1.

[0066] It should be noted that the third fixing part can be disposed within the first bifurcation support 18 or the second bifurcation support 19. When the first fixing part 1221 and the second fixing part 1222 are located on the side of the first bifurcation support 18, the third fixing part is disposed within the first bifurcation support 18. When the first fixing part 1221 and the second fixing part 1222 are located on the side of the second bifurcation support 19, the third fixing part is disposed within the second bifurcation support 19. To avoid the bare stent 16 being difficult to reposition by contraction when anchored within the blood vessel, in the first embodiment of the present invention, the bare stent 16 is bound to a post-release structure (such as...). Figure 8B As shown), when the bare support 16 needs to be fully released, the bare support 16 is then separated from the rear release structure, allowing the bare support 16 to be released from the restraint of the rear release structure and fully unfolded. That is, after the support 1 has been initially released and unfolded, the bare support 16 is still restrained by the rear release structure. At this time, the position of the support 1 can be observed, and the position of the support 1 can be adjusted by the pull wire 13 and the release wire 14 (e.g., Figure 8C (As shown). After adjusting the position of the stent 1, the bare stent 16 is then separated from the post-release structure, so that the bare stent 16 is anchored in the blood vessel.

[0067] Please see Figure 8A , Figure 9 and Figure 10The bracket 1 further includes a connector 10, which is disposed between the first branch bracket 18 and the second branch bracket 19. The connector 10 connects the first branch bracket 18 and the second branch bracket 19, thereby limiting the range of motion of the first branch bracket 18 and the second branch bracket 19 and preventing them from bending or kinking due to excessive movement. In the first embodiment of the present invention, one end of the connector 10 is connected to the annular wave coil 11 at the distal end of the first branch bracket 18, and the other end is connected to the annular wave coil 11 at the distal end of the second branch bracket 19.

[0068] Please see Figure 9 A second embodiment of the present invention provides a support system, which includes the support 1 of the first embodiment and a conveyor 2. The conveyor 2 includes a sheath assembly 21, a sheath adjustment assembly 22, a sheath core adjustment assembly 23, a release wire adjustment assembly 24, a draw wire adjustment assembly 25, and a rear handle 26. The support 1 is mounted on the distal end of the sheath assembly 21. The sheath adjustment assembly 22 includes a slide rod 221, a fixed handle 222, and a sliding handle 223. The fixed handle 222 is fixedly disposed on the distal end of the slide rod 221, and the sliding handle 223 is disposed on the proximal side of the fixed handle 222, and the sliding handle 223 can slide relative to the slide rod 221. The proximal end of the sheath assembly 21 is connected to the sliding handle 223, and the distal end of the rear handle 26 is connected to the proximal end of the slide rod 221. When the sliding handle 223 slides towards the proximal end, it can drive the sheath assembly 21 to move towards the proximal end, thereby releasing the support 1. The sheath core adjustment assembly 23, the release wire adjustment assembly 24, and the pull wire adjustment assembly 25 are disposed on the proximal side of the rear handle 26. The proximal end of the pull wire 13 is connected to the pull wire adjustment assembly 25, and the proximal end of the release wire 14 is connected to the release wire adjustment assembly 24.

[0069] The sheath core adjustment assembly 23 includes a sheath core 231 and a locking member 232. The proximal end of the sheath core 231 enters from the distal end of the sheath assembly 21 and exits from the proximal end of the rear handle 26. The locking member 232 is sleeved on the proximal end of the rear handle 26. The locking member 232 is threadedly connected to the rear handle 26. When the locking member 232 is tightened with the rear handle 26, the sheath core 231 is locked and cannot move relative to the sheath assembly 21 or the rear handle 26. The sheath core adjustment assembly 23 is used to anchor the distal end of the bracket 1. When the bracket 1 needs to be released, the sheath core 231 is moved proximally to release the distal end of the bracket 1, allowing the distal end of the bracket 1 to be fully released. The sheath assembly 21, sheath adjustment assembly 22, and sheath core adjustment assembly 23 are prior art and will not be described in detail here.

[0070] Further, please refer to Figure 9 - Figure 11 In the second embodiment of the present invention, the release wire adjustment assembly 24 is disposed on the side of the rear handle 26, and the pull wire adjustment assembly 25 is disposed on the rear handle 26 and on the opposite side of the release wire adjustment assembly 24. The release wire adjustment assembly 24 includes a first side support 241 and a first disassembly member 242, the first disassembly member 242 being a screw. The first side support 241 is integrally formed with the rear handle 26, and the inner cavity of the first side support 241 communicates with the inner cavity of the rear handle 26. A first mating hole 2411 is provided on the outer wall of the first side support 241, and a thread is provided in the first mating hole 2411, the first disassembly member 242 being threadedly engaged with the first mating hole 2411. The proximal end of the release wire 14 enters the inner cavity of the first side support 241 and then exits from the proximal end of the first side support 241. When it is necessary to fix the release wire 14, the first disassembly member 242 is rotated to enter the inner cavity of the first side support 241 and press the first release wire 14. When it is necessary to remove the release wire 14 from the human body, rotate the first disassembly member 242 to separate it from the release wire 14, and then pull the release wire 14 towards the proximal end to remove it from the human body.

[0071] Please see Figure 9 and Figure 12 The pull wire adjustment assembly 25 includes a second side support 251 and a second detachable component 252. The second side support 251 is integrally formed with the rear handle 26, and the inner cavity of the second side support 251 communicates with the inner cavity of the rear handle 26. The second detachable component 252 is detachably engaged with the proximal end of the second side support 251. The proximal end of the pull wire 13 passes through the second side support 251 and is fixedly connected to the second detachable component 252. When it is necessary to retract the bracket 1, the second detachable component 252 can be removed from the second side support 251, and the second detachable component 252 can be pulled towards the proximal end, thereby moving the pull wire 13 towards the proximal end, thus retracting the bracket 1. When it is necessary to release the retracted state of the bracket 1, the second detachable component 252 can be released. Due to the self-expansion property of the bracket 1, the bracket 1 can automatically return to the extended state. It should be noted that the detachable connection between the second detachable component 252 and the second side support 251 can be an interference fit, a snap-fit, etc. The proximal end of the pull wire 13 can be fixed to the second disassembly component 252 by applying adhesive. A through hole with a diameter slightly larger than that of the pull wire 13 can also be provided on the second disassembly component 252. After the proximal end of the pull wire 13 is passed through the through hole, a knot is tied at the proximal end of the pull wire 13. The knot size of the pull wire 13 is larger than that of the through hole, thereby restricting the pull wire 13 from moving towards the distal end relative to the second disassembly component 252.

[0072] The process of adjusting the position of the stent 1 by the delivery device 2 is as follows: After the distal end of the stent 1 is released, if the position of the distal end of the stent 1 is found to be unsatisfactory, the second disassembly member 252 can be pulled to retract the distal end of the stent 1. Once the distal end of the stent 1 is no longer in contact with the blood vessel wall, the position of the stent 1 can be adjusted. Then, the second disassembly member 252 is released again to allow the distal end of the stent 1 to be fully released. Then, the first disassembly member 242 is rotated to release the fixation of the release wire 14. At this time, the proximal end of the release wire 14 can be pulled to withdraw it from the body to the outside. Now that the pull wire 13 is no longer restricted by the release wire 14, the second disassembly member 252 can be pulled proximally to withdraw the pull wire 13 from the body to the outside.

[0073] It should be noted that, to prevent the release wire 14 and the pull wire 13 from tangling within the conveyor 2, separate cavities can be provided for threading the release wire 14 and the pull wire 13. For example, the conveyor 2 may have release wire cavities and pull wire cavities spaced apart along the axial direction of the conveyor. After the distal end of the release wire 14 passes through the release wire adjustment assembly 24, it enters the release wire cavity from the proximal end and then exits from the distal end into the bracket 1. After the distal end of the pull wire 13 passes through the pull wire adjustment assembly 25, it enters the pull wire cavity from the proximal end and then exits from the distal end into the bracket 1. The second disassembly component 252 can be omitted; the proximal end of the pull wire 13 can be exposed to the proximal end of the second side support 251, and the proximal end of the pull wire 13 can be pulled directly. Alternatively, the pull wire adjustment assembly 25 can include a screw, with a threaded through hole provided on the side wall of the second side support 251. The screw is screwed into the threaded through hole, thereby pressing the proximal end of the pull wire 13 and restricting its movement. For example, after the bracket 1 retracts when the pull wire 13 is pulled, if it is necessary to maintain the retracted state of the bracket 1, the screw can be screwed into the threaded through hole to press the proximal end of the pull wire 13, restricting its movement and thus maintaining the retracted state of the bracket 1. A handheld structure can also be provided near the proximal end of the first side support 241, fixing the proximal end of the release wire 14 to the handheld structure. Pulling the handheld structure will then move the release wire 14.

[0074] Please see Figure 13 - Figure 15The third embodiment of the present invention provides a support system, which includes a support 1 from the first embodiment and a conveyor 3. The main difference between the conveyor 3 and the conveyor 2 from the second embodiment lies in the structural differences of the release wire adjustment assembly 34 and the draw wire adjustment assembly 35. Specifically, the release wire adjustment assembly 34 includes a first side support 341, a first disassembly member 342, and a pressure gripper 343. The outer surface of the proximal end of the first side support 341 is provided with an external thread 3411. The first disassembly member 342 has a hollow cavity 3421, and an internal thread 3422 is provided on the distal end of the hollow cavity 3421. An inclined structure 3423 is immediately provided on the proximal side of the internal thread 3422. The pressure gripper 343 includes a straight tube structure 3431 and a large-diameter portion 3432 with a diameter larger than that of the straight tube structure 3431. The diameter of the large-diameter portion 3432 is larger than the diameter of the inner cavity of the first side support 341. The pressure gripper 343 has multiple through grooves 3433 penetrating its inner and outer surfaces on its sidewall. These through grooves extend from the straight tube structure 3431 to the proximal end face of the large-diameter portion 3432, allowing the large-diameter portion 3432 to contract towards its central axis. During installation, the proximal end of the release wire 14 is sequentially passed through the first side branch 341, the pressure gripper 343, and the first disassembly member 342. The straight tube structure 3431 is then housed within the inner cavity of the proximal end of the first side branch 341. Since the diameter of the large-diameter portion 3432 is larger than the diameter of the inner cavity of the first side branch 341, the large-diameter portion 3432 is exposed at the proximal end of the first side branch 341. At this point, the internal thread 3422 of the first disassembly member 342 is aligned with the external thread 3411 on the first side branch 341, resulting in a threaded connection between the first disassembly member 342 and the first side branch 341. At this point, the large-diameter portion 3432 enters the hollow cavity 3421 until its proximal end face abuts against the inclined structure 3423. The inclined structure 3423 compresses the large-diameter portion 3432, causing it to deform and contract towards its central axis. The inner wall of the large-diameter portion 3432 then presses against the outer surface of the release wire 14, locking it and restricting its movement, thus fixing the proximal end of the release wire 14 within the release wire adjustment assembly 34. When it is necessary to pull the release wire 14, simply rotate the first disassembly member 342, moving it towards the proximal end. The inclined structure 3423 then stops compressing the large-diameter portion 3432, allowing the release wire 14 to be pulled.

[0075] Please see Figure 16 and Figure 17The wire adjustment assembly 35 includes a second side support 351, a second disassembly member 352, a connector 353, and a guide structure 354. The second disassembly member 352 is sleeved on the proximal end of the second side support 351, and the distal end of the second disassembly member 352 is engaged with the proximal end of the second side support 351. An internal thread 3521 is provided on the inner wall of the proximal end of the second disassembly member 352, and an external thread 3531 is provided on the outer surface of the distal end of the connector 353. The internal thread 3521 of the disassembly member and the external thread 3531 of the connector are threadedly connected, thereby connecting the second side support 351 and the connector 353 through the second disassembly member 352. The guide structure 354 includes an integrally formed guide screw 3541, a guide engagement portion 3542, and a knob 3543. The guide screw 3541 is located at the center of the distal end face of the knob 3543, and the guide engagement portion 3542 is located on the distal end face of the knob 3543 and on the outer periphery of the guide screw 3541. The guide structure 354 also includes a slider 3544, which is sleeved on the guide screw 3541 and threadedly connected to it. The connector 353 has a connector engagement portion 3532 at its proximal end, which is an annular groove structure. The slider 3544, together with the guide screw 3541, passes into the connector 353, and the guide engagement portion 3542 engages with the connector engagement portion 3532, thereby allowing the guide structure 354 and the connector 353 to be rotatably connected. The knob 3543 is exposed near the end of the connector 353. After the guide engagement portion 3542 engages with the connector engagement portion 3532, the axial movement of the guide structure 354 relative to the connector 353 is restricted, but the guide structure 354 can rotate relative to the connector 353. The near end of the pull wire 13 is fixed to the slider 3544. When the pull wire 13 needs to move, the knob 3543 is rotated. Since the axial movement of the guide structure 354 is restricted, the rotation of the knob 3543 will drive the slider 3544 to move on the guide screw 3541. The movement of the slider 3544 will in turn drive the pull wire 13 to move. When it is necessary to remove the pull wire 13 from the body, rotate the connector 353 to separate it from the second disassembly component 352. Then, the connector 353 can be moved, allowing the connector 353, guide structure 354, and pull wire 13 to be removed together. Since the connector 353, guide structure 354, and pull wire 13 can be removed together without needing to individually grasp the thin pull wire 13, it is easier for the doctor to remove the pull wire 13 from the body.

[0076] It should be noted that, to prevent the slider 3544 from rotating, a track 3533 is provided on the inner wall of the connector 353 along the axial direction of the connector 353, and a sliding part 3545 is formed by protrusions on the side wall of the slider 3544, which is connected to the track 3533. When the slider 3544 moves, the sliding part 3545 moves on the track 3533, and the track 3533 restricts the sliding part 3545 from moving in the circumferential direction of the connector 353, thereby ensuring that the slider 3544 does not rotate, and thus preventing the pull wire 13 fixed on the slider 3544 from rotating. Furthermore, to prevent the proximal end of the pull wire 13 from getting tangled with the guide screw 3541, a guide part 3511 is provided in the second side support 351, and a fixing hole 3546 is provided on the slider 3544. The guide portion 3511 is a through hole structure protruding from the inner wall of the second side support 351, and the guide portion 3511 is coaxially arranged with the fixing hole 3546. The proximal end of the pull wire 13 passes through the guide portion 3511 and is fixed in the fixing hole 3546, so that the proximal end of the pull wire 13 is restricted by the guide portion 3511 and the fixing hole 3546 and is kept as far away from the guide screw 3541 as possible, thereby preventing the pull wire 13 from getting tangled on the guide screw 3541 during movement.

[0077] Please see Figure 18 - Figure 20The fourth embodiment of the present invention provides a support system, which includes the support 1 of the first embodiment and a conveyor 4. The main difference between the conveyor 4 and the conveyors of the second and third embodiments lies in the structural differences of the release wire adjustment assembly 44 and the draw wire adjustment assembly 45. Specifically, the release wire adjustment assembly 44 includes a first side support 441, a first disassembly component 442, a pressure gripper 443, a screw 444, and a locking component 445. The structures of the first disassembly component 442 and the pressure gripper 443 are the same as those of the first disassembly component 442 and the pressure gripper 443 in the third embodiment, and will not be described again here. The distal end of the first disassembly component 442 is housed in the first side support 441. A threaded through hole is provided on the side wall of the first side support 441, and the screw 444 is threadedly connected to the threaded through hole. When the screw 444 enters the first side support 441, it abuts against the outer surface of the first disassembly member 442, thereby fixing the distal end of the first disassembly member 442 inside the first side support 441, thus connecting the first disassembly member 442 to the first side support 441. The internal thread 4422 and the inclined structure 4423 of the first disassembly member 442 face towards the proximal end. The outer surface of the distal end of the locking member 445 is provided with an external thread 4451. The locking member 445 has a hollow cavity, the diameter of which is slightly larger than the diameter of the straight tube structure 4431 and smaller than the diameter of the large-diameter portion 4432. During installation, the proximal end of the release wire 14 is sequentially passed through the first side support 441, the first disassembly member 442, the pressure gripper 443, and the locking member 445. The distal end of the first disassembly member 442 is inserted into the proximal end of the first side support 441. Then, the screw 444 is threaded into the threaded through hole, with the screw 444 abutting against the outer surface of the first disassembly member 442, thereby fixing the distal end of the first disassembly member 442 within the first side support 441. Subsequently, the straight tube structure 4431 of the gripper 443 is inserted into the cavity of the locking member 445 from its distal end. Since the diameter of the cavity of the locking member 445 is smaller than the diameter of the large-diameter portion 4432, the large-diameter portion 4432 protrudes beyond the distal end of the locking member 445. Then, connect the external thread 4451 of the locking member 445 to the internal thread 4422 of the first disassembly member 442 until the distal end face of the large diameter portion 4432 abuts against the inclined structure 4423. The inclined structure 4423 compresses the large diameter portion 4432, causing it to deform and contract towards its central axis. At this time, the inner wall of the large diameter portion 4432 will press against the outer surface of the release wire 14, thereby restricting the movement of the release wire 14 and fixing the proximal end of the release wire 14 within the release wire adjustment assembly 44.When it is necessary to remove the release wire 14 from the body, the screw 444 can be rotated directly so that the screw does not hold the first disassembly member 442. At this time, the first disassembly member 442 can be pulled to move towards the proximal end, thereby removing the first disassembly member 442, the gripper 443, the locking member 445 and the release wire 14 together.

[0078] Please see Figure 18 and Figure 21 The wire adjustment assembly 45 includes a second side support 451, a second disassembly component 452, a rotating component 453, and a guide structure 454. The outer surface of the proximal end of the second side support 451 is provided with an external thread, and the inner wall of the distal end of the second disassembly component 452 is provided with an internal thread. The internal thread connects with the external thread, thereby fixing the second disassembly component 452 onto the second side support 451. The rotating component 453 is a tubular structure, and its inner wall is provided with an internal thread. The distal end of the rotating component 453 is rotatably connected to the proximal end of the second disassembly component 452, so that the rotating component 453 cannot move axially relative to the second disassembly component 452, but can rotate relative to the second disassembly component 452. The guide structure 454 includes a guide rail 4541, a guide rail fixing member 4542, an end cap 4543, and a slider 4544. The guide rail fixing member 4542 is disposed between the second side support 451 and the rotating member 453, and the distal end of the guide rail 4541 is fixed to the guide rail fixing member 4542. The distal end of the end cap 4543 is rotatable from the proximal end of the rotating member 453, and the proximal end of the guide rail 4541 is connected to the end cap 4543. The second disassembly member 452 and the guide structure 454 restrict the axial movement of the rotating member 453, so that when the rotating member 453 is rotated, it only rotates and does not move axially. The slider 4544 is disposed on the guide rail 4541, and the outer surface of the slider 4544 is provided with an external thread, which is threadedly connected to the internal thread of the rotating member 453. The near end of the pull wire 13 is fixed to the slider 4544. In use, rotating the rotating component 453 causes the slider 4544 to move axially along the guide rail 4541, thereby moving the pull wire 13 and adjusting the bracket 1. When it is necessary to remove the pull wire 13, the second disassembly component 452 can be rotated to separate it from the second side support 451. At this time, the second disassembly component 452, the rotating component 453, the guide structure 454, and the pull wire 13 can be removed together.

[0079] It should be noted that a limiting ring can be provided on the guide rail 4541 to limit the travel of the slider 4544, thereby reminding the doctor that the slider 4544 has reached its limit position. The limiting ring can be made of stainless steel or polymer material and is fixed to the guide rail 4541 by bonding, pressing, heat shrinking, or other methods. In the fourth embodiment of the present invention, there are two guide rails 4541, which are spaced apart and arranged in parallel, and the slider 4544 is disposed between the two guide rails 4541. The arrangement of two guide rails 4541 provides better stability and can prevent the slider 4544 from becoming immobile due to bending caused by force on the guide rails 4541.

[0080] Please see Figure 22 The fifth embodiment of the present invention provides a support system, which includes the support 1 of the first embodiment and a conveyor. The main difference between the conveyor and the conveyor 4 of the fourth embodiment lies in the different methods of fixing the guide structure 554 and the proximal end of the pull wire 13. Specifically, a mounting portion 5545 is formed by protruding on the proximal end face of the slider 5544. The guide structure 554 also includes a pulley 5546, which is mounted on the mounting portion 5545. The pulley 5546 can rotate relative to the mounting portion 5545. After the proximal end of the pull wire 13 passes through the guide rail fixing member 5542, it passes through the slider 5544 and wraps around one side of the pulley 5546 to the other side, then passes through the slider 5544 and is fixed to the guide rail fixing member 5542. Because the pull wire 13 is wound around the pulley 5546, when the slider 5544 moves towards the near end, the stroke of the pull wire 13 on both sides of the pulley 5546 increases, thereby reducing the required sliding stroke of the slider 5544. This reduced stroke of the slider 5544 ensures more accurate and sensitive adjustment of the bracket 1 by the pull wire 13, and also reduces the axial length of the rotating member 553, making the guide structure 554 more refined and compact. Furthermore, please refer to... Figure 23 (The mounting section 5545 and pulley 5546 are omitted in the figure.) In the fifth embodiment of the present invention, there are two guide rails 5541, which are arranged on both sides of the slider 5544, that is, the slider 5544 is arranged between the two guide rails 5541. The two guide rails 5541 can restrict the rotation of the slider 5544, so that the slider 5544 can move stably along the axial direction of the guide rails 5541. At the same time, arranging the guide rails 5541 on the side of the slider 5544 can also avoid interference with the pulley 5546 arranged at the center of the slider 5544.

[0081] It should be noted that you should refer to [link / reference]. Figure 23 Since the specifications of the bracket 1 may vary, the stroke of the pull wire 13 may also vary, meaning the required working length of the pull wire 13 may differ. Therefore, a take-up reel 555 can be provided to fix the proximal end of the pull wire 13 onto the take-up reel 555. After calculating the required length of the pull wire 13, the take-up reel 555 can be rotated, causing the proximal end of the pull wire 13 to coil around the take-up reel 555, thereby adjusting the working length of the pull wire 13. After adjusting the working length of the pull wire 13, the take-up reel 555 is then fixed onto the guide rail fixing member 5542.

[0082] Please see Figure 24 and Figure 25The sixth embodiment of the present invention provides a support system, which includes the support 1 of the first embodiment and a conveyor. The main difference between the conveyor and the conveyor of the fifth embodiment is the wire adjustment assembly 65. The wire adjustment assembly 65 includes a second side support 651, a housing 652, and a control member 653. The proximal end of the second side support 651 is detachably connected to the distal end of the housing 652, and the control member 653 is rotatable relative to the housing 652. The control member 653 includes a control member body 6531 disposed at the distal end and a rotating part 6530 disposed on the proximal side of the control member body 6531. The control member body 6531 is housed within the housing 652, and the rotating part 6530 is exposed outside the housing 652. Specifically, two threading holes 6521 are provided on the inner sidewall of the distal end of the housing 652, and the two threading holes 6521 are coaxially spaced apart. The control component body 6531 is provided with a plurality of first locking structures 6532, which are evenly spaced on the outer surface of the control component body 6531 in the circumferential direction. A first inclined structure 6533 is provided at the proximal end of each first locking structure 6532. A first limiting structure 6522 is provided on the inner side of the proximal end of the housing 652, and a second inclined structure 6523 is provided at the distal end of the first limiting structure 6522. A second locking structure 6534 is also provided on the outer surface of the control component body 6531 on the proximal side of the first locking structure 6532. The second locking structure 6534 can be an annular structure, arranged along the circumference of the control component body 6531. The second locking structure 6534 can also be one or more protrusions. A third inclined structure 6535 is provided at the proximal end of the second locking structure 6534. The proximal end of the housing 652 is provided with a through hole 6524 for the control body 6531 to pass through. A second limiting structure 6525 protrudes inwardly from the inner sidewall of the through hole 6524, and a fourth inclined surface structure 6526 is provided at the distal end of the second limiting structure 6525. The second limiting structure 6525 can be an annular structure, arranged circumferentially along the inner sidewall of the through hole 6524. The second limiting structure 6525 can also be one or more protrusions. After the proximal end of the pull wire 13 enters the housing 652, it passes through two threading holes 6521 in sequence, and is then fixed to the portion of the control body 6531 located in the direction proximal to the threading holes 6521.

[0083] In use, when the rotating part 6530 is rotated, the control member 653 rotates as a whole. The proximal end of the pull wire 13 coils around the control member body 6531, thereby causing the distal end of the pull wire 13 to move towards the proximal end, allowing the pull wire 13 to adjust the bracket 1. The proximal end of the pull wire 13 is restrained by the two threading holes 6521, ensuring that the portion of the pull wire 13 passing through the two threading holes 6521 does not rotate along with the rotation of the control member 653. This ensures that the pull wire 13 on the distal side of the threading hole 6521 does not become entangled with the rotation of the control member 653. The pull wire 13 only rotates and coils around the control member body 6531 to a certain extent on the proximal side of the threading hole 6521. Therefore, the threading hole 6521 prevents the pull wire 13 from becoming entangled and causing the pull wire adjustment assembly 65 to malfunction. When adjusted to the appropriate state, pull the rotating part 6530 towards the proximal end, causing the first limiting structure 6522 to enter between the two adjacent first locking structures 6532. This restricts the rotation of the control member 653, thus maintaining the adjusted state of the bracket 1. If it is necessary to further restrict the movement of the control member 653 towards the distal end, preventing the first limiting structure 6522 from separating from the first locking structure 6532 after the control member 653 moves towards the distal end, the rotating part 6530 can be slightly pulled towards the proximal end again. This causes the second locking structure 6534 to pass the second limiting structure 6525 towards the proximal end, with the distal end face of the second locking structure 6534 abutting against the proximal end face of the second limiting structure 6525, thereby restricting the movement of the control member 653 towards the distal end. When the bracket 1 needs to be fully extended and the pull wire 13 needs to be reset... Then, a force is applied further towards the rotating part 6530, causing the second locking structure 6534 to pass the second limiting structure 6525 at the distal end. At this time, the control member 653 can continue to move towards the distal end, thereby separating the first limiting structure 6522 from the first locking structure 6532. The pull wire 13 moves towards the distal end, causing the control member 653 to rotate, thereby allowing the pull wire 13 coiled on the control member body 6531 to return to its distal end. When it is necessary to remove the pull wire 13 from the body, the housing 652 can be separated from the second side support 651, thereby allowing the housing 652, the control member 653, and the pull wire 13 to be removed together.

[0084] It should be noted that the housing 652 and the second side support 651 can be detachably connected by means of snap-fit, magnetic attraction, interference fit, etc. This is to ensure that the first limiting structure 6522 enters between two adjacent first locking structures 6532, thereby restricting the rotation of the control component 653. Therefore, please refer to... Figure 26 and Figure 27 A first inclined surface structure 6533 is provided at the proximal end of the first locking structure 6532, and a second inclined surface structure 6523 is provided at the distal end of the first limiting structure 6522. When the first locking structure 6532 moves toward the first limiting structure 6522, even if the first limiting structure 6522 is not aligned with the gap between two adjacent first locking structures 6532, the first inclined surface structure 6533 and the second inclined surface structure 6523 can act as guides, allowing the first limiting structure 6522 to smoothly enter the gap between the two first locking structures 6532. Simultaneously, to ensure that the second locking structure 6534 can smoothly pass through the second limiting structure 6525, a third inclined surface structure 6535 is provided at the proximal end of the second locking structure 6534, and a fourth inclined surface structure 6526 is provided at the distal end of the second limiting structure 6525. After the third inclined structure 6535 abuts against the fourth inclined structure 6526, the control member 653 continues to move proximally, and the third inclined structure 6535 slides on the fourth inclined structure 6526. Subsequently, the second locking structure 6534 and / or the second limiting structure 6525 undergo slight deformation, allowing the second locking structure 6534 to pass through the second limiting structure 6525. The arrangement of the third inclined structure 6535 and the fourth inclined structure 6526 reduces the force required for the second locking structure 6534 to pass through the second limiting structure 6525. The second locking structure 6534 and the second limiting structure 6525 can be made of materials such as silicone or polymer materials.

[0085] Furthermore, please combine Figure 28When the bracket 1 is fully extended and released, the pull wire 13 needs to move to its distal end to reset. To ensure that the bracket 1 can be fully extended and released, and to avoid the pull wire 13 being unable to move to its distal end due to being coiled on the control body 6531, the pull wire adjustment assembly 65 may further include a torsion spring 656. The distal end of the torsion spring 656 is connected to the inner wall of the distal end of the housing 652, and the proximal end of the torsion spring 656 is connected to the distal side of the control body 6531. When the pull wire 13 moves to the proximal end to adjust the bracket 1, rotating the control body 653 will cause the torsion spring 656 to compress and deform. At this time, the torsion spring 656 has elastic potential energy generated by the compression deformation. When the pull wire 13 needs to move to the distal end to reset and the bracket 1 is fully extended and released, the control member 653 is released, and the elastic potential energy of the torsion spring 656 restores it to its original state. The torsion spring 656 returns to its original state and drives the control member 653 to rotate, thereby causing the pull wire 13 to move to the distal end to reset and the bracket 1 to fully extend and release.

[0086] Please see Figure 29The seventh embodiment of the present invention provides a support system, which includes the support 1 of the first embodiment and a conveyor. The main difference between the conveyor and the conveyor of the sixth embodiment lies in the wire adjustment assembly 75. Specifically, the wire adjustment assembly 75 includes a second side support 751, a housing 752, a control component 753, a second disassembly component 754, and a locking component 755. The second side support 751 has an external thread on its proximal outer surface, and the second disassembly component 754 has an internal thread on its distal inner sidewall. The internal thread of the second disassembly component 754 is threadedly connected to the external thread of the second side support 751. The distal end of the housing 752 is connected to the proximal end of the second disassembly component 754. The proximal end of the housing 752 has a gripping portion 7521, and the outer surface of the distal end of the gripping portion 7521 has an external thread. The inner sidewall of the distal end of the locking component 755 has an internal thread. The structure of the gripping portion 7521 is substantially the same as the large-diameter portion of the pressure gripper in the third and fourth embodiments, and will not be described again here. When the internal thread of the locking member 755 is threadedly connected to the external thread of the gripping part 7521, the proximal end of the gripping part 7521 will be resisted by the inner sidewall of the proximal end of the locking member 755, causing the proximal end of the gripping part 7521 to contract towards the central axis of the gripping part 7521. Further, the control member 753 includes a control member body 7531 disposed at the distal end. The control member body 7531 is used to connect to the proximal end of the pull wire 13. The proximal end of the pull wire 13 can be coiled around the control member body 7531. The proximal end of the control member body 7531 extends proximally to form an extension 7532. The extension 7532 passes through the gripping part 7521 and is exposed at the proximal end of the gripping part 7521. The portion of the proximal end of the extension 7532 exposed in the gripping part 7521 is provided with a rotating part 7533. In use, first rotate the rotating part 7533 so that the proximal end of the pull wire 13 is coiled around the control body 7531. When it is necessary to maintain the adjusted state of the bracket 1, rotate the locking member 755 so that the proximal end of the gripping part 7521 retracts towards the central axis of the gripping part 7521, thereby causing the proximal end of the gripping part 7521 to abut against the outer surface of the extension 7532, so that the control member 753 is locked and cannot be rotated, thus maintaining the adjusted state of the bracket 1. When it is necessary to remove the pull wire 13 from the body, simply rotate the second disassembly member 754 to separate the second disassembly member 754 from the second side support 751. At this time, the housing 752, control member 753, second disassembly member 754, locking member 755, and pull wire 13 can be removed together.

[0087] Please see Figure 30The eighth embodiment of the present invention provides a support system, which includes a support 1 as described in the first embodiment and a conveyor. The main difference between the conveyor and the conveyor in the previous embodiments is that the release wire adjustment assembly 84 and the pull wire adjustment assembly 85 are located on the same side of the rear handle. Specifically, the pull wire adjustment assembly 85 is structurally almost identical to the pull wire adjustment assembly 45 of the fourth embodiment and the pull wire adjustment assembly 55 of the fifth embodiment, with the main difference being that the end cap 8543 of the pull wire adjustment assembly 85 extends proximally to form a mating portion 8544. The release wire adjustment assembly 84 is structurally almost identical to the pull wire adjustment assembly 45 of the fourth embodiment and the pull wire adjustment assembly 55 of the fifth embodiment, with the main difference being that the release wire adjustment assembly 84 omits the first side support. An external thread is provided on the outer surface of the proximally end of the mating portion 8544. The release wire adjustment assembly 84 includes a first disassembly member 842 and a pressure gripper 843. The straight tube structure 8431 of the pressure gripper 843 is housed within the mating part 8544. Then, the internal thread 8422 of the first disassembly member 842 is connected to the external thread of the mating part 8544, thereby connecting the first disassembly member 842 and the pressure gripper 843 to the end cap 8543. The proximal end of the release wire 14 passes through the distal end of the pull wire adjustment assembly 85 and enters the pressure gripper 843 and the first disassembly member 842 from the proximal end of the pull wire adjustment assembly 85. The pressure gripper 843 locks the release wire 14 in place. By positioning the release wire adjustment assembly 84 and the pull wire adjustment assembly 85 on the same side of the rear handle, both can be disassembled simultaneously, facilitating doctor operation. Meanwhile, the pull wire adjustment assembly 85 and the release wire adjustment assembly 84 are coaxially arranged, which further facilitates the doctor's operation. When it is necessary to remove the release wire adjustment assembly 84 and the pull wire adjustment assembly 85, simply remove the release wire 14 first, then separate the second disassembly piece 852 from the second side support 851. At this time, the second disassembly piece 852, the rotating piece 853, the guide structure 854, the release wire adjustment assembly 84, and the pull wire 13 can be removed together.

[0088] In other specific embodiments of the present invention, the release wire adjustment assembly 84 may also be connected to the side wall of the second side branch 851.

[0089] Please see Figure 31The ninth embodiment of the present invention provides a support system, which includes a support 1 as described in the first embodiment and a conveyor. The main difference between the conveyor and the conveyor in the eighth embodiment is that the wire adjustment assembly 95 adopts the wire adjustment assembly 75 of the seventh embodiment. In addition, a first side support 941 of the release wire adjustment assembly 94 is provided on the side wall of the wire adjustment assembly 95. The first disassembly member 942 and the pressure gripper 943 are connected to the first side support 941, that is, the release wire adjustment assembly 94 is entirely disposed on the side wall of the wire adjustment assembly 95. Similarly, when it is necessary to remove the release wire adjustment assembly 94 and the wire adjustment assembly 95, it is only necessary to first remove the release wire 14 and then separate the second disassembly member 954 from the second side support 951. At this time, the housing 952, the control member 953, the second disassembly member 954, the locking member 955, the release wire adjustment assembly 94, and the wire 13 can be removed together.

[0090] Further, in the ninth embodiment of the present invention, the threading hole includes a first threading hole 9521 disposed near the release wire adjustment assembly 94, and a second threading hole 9522 disposed opposite to the first threading hole 9521. The release wire 14 enters the rear handle (not shown) at its proximal end, passes through the second side branch 951 into the housing 952, then passes through the first threading hole 9521 into the first side branch 941, and finally passes through the gripper 943 and is received in the first disassembly member 942. The pull wire 13 enters the rear handle at its proximal end, passes through the second side branch 951 into the housing 952, then passes through the second threading hole 9522 and connects to the control member 953. The first threading hole 9521 and the second threading hole 9522 also function to prevent the pull wire 13 and the release wire 14 from tangling within the housing 952.

[0091] It should be noted that the wire adjustment components in each embodiment are not limited to adjusting only the wire; they can also connect the release wire to the wire adjustment component, thereby adjusting the release wire through the wire adjustment component. Similarly, the release wire adjustment components in each embodiment are not limited to adjusting only the release wire; they can also connect the wire to the release wire adjustment component, thereby adjusting the wire. Furthermore, the wire adjustment components and release wire adjustment components in each embodiment can be used in conjunction with each other. For example, the wire adjustment component in Embodiment 2 and the release wire adjustment component in Embodiment 3 can be used on the same conveyor, and the release wire adjustment component in Embodiment 4 and the wire adjustment component in Embodiment 7 can be used on the same conveyor.

[0092] Compared with existing technologies, the stent of the present invention has the following advantages: The present invention, through the arrangement of a pull wire, a release wire, a pull wire adjustment assembly, and a release wire adjustment assembly, allows the stent to be radially retracted and its position readjusted after release into the blood vessel, thereby precisely releasing the stent to the target location and avoiding risks such as endoleak, displacement, and failure. This reduces the difficulty of the surgery, increases the margin of error during the procedure, and also prevents the stent from scratching the blood vessel wall.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A support system, characterized in that: The support system includes a tubular support and a conveyor. The support includes a pull wire and a release wire. The conveyor includes a release wire adjustment assembly and a pull wire adjustment assembly disposed on the proximal side of the conveyor. The distal side of the pull wire includes a collar structure. The pull wire wraps around the inner side of the support at least once in the circumferential direction. The proximal side of the pull wire passes through the proximal end of the support and is connected to the pull wire adjustment assembly. Part of the pull wire adjustment assembly rotates, thereby driving the pull wire to move. The distal side of the release wire passes through the collar structure and is connected to the collar structure. The proximal side of the release wire passes through the proximal end of the support and is connected to the release wire adjustment assembly.

2. The support system as described in claim 1, characterized in that: The release wire adjustment assembly includes a first side support and a first disassembly component. The conveyor includes a rear handle. The distal end of the first side support is connected to the rear handle. The proximal end of the release wire enters the first side support after passing through the rear handle, and then passes through the first disassembly component and exits from the proximal end of the first side support. A first mating hole is provided on the outer wall of the first side support. The first disassembly component mates with the first mating hole, which allows the release wire to be connected to or separated from the first side support.

3. The support system as described in claim 1, characterized in that: The wire adjustment assembly includes a second side support, a second disassembly component, and a rotating component. The conveyor includes a rear handle. The distal end of the second side support is connected to the rear handle, and the proximal end of the second side support is connected to the distal end of the second disassembly component. The distal end of the rotating component is rotatably connected to the proximal end of the second disassembly component. The proximal end of the wire passes through the rear handle and enters the second side support, where it is fixed within the rotating component.

4. The support system as described in claim 3, characterized in that: The wire adjustment assembly further includes a guide structure, which includes a guide rail, a guide rail fixing member, an end cap, and a slider. The guide rail fixing member is disposed between the second side support and the rotating member. The distal end of the guide rail is fixed to the guide rail fixing member. The distal end of the end cap is rotatably connected to the proximal end of the rotating member. The proximal end of the guide rail is connected to the end cap. The slider is disposed on the guide rail and can move along the guide rail. The proximal end of the wire is connected to the slider.

5. The support system as described in claim 4, characterized in that: The inner wall of the rotating component is provided with an internal thread, and the outer surface of the slider is provided with an external thread. The external thread of the slider is threadedly connected to the internal thread of the rotating component. When the rotating component is rotated, the rotating component drives the slider to move axially along the guide rail, thereby driving the wire to move.

6. The support system as described in claim 5, characterized in that: The slider has a protrusion on its proximal end face to form a mounting part. The guide structure also includes a pulley, which is mounted on the mounting part. The pull wire passes through the guide rail fixing member from the proximal end, passes through the slider, and wraps around one side of the pulley to the other side of the pulley. Then it passes through the slider from the distal end and is fixed to the guide rail fixing member.

7. The support system as described in claim 1, characterized in that: The wire adjustment assembly includes a second side support, a housing, and a control component. The conveyor includes a rear handle. The distal end of the second side support is connected to the rear handle, and the proximal end of the second side support is detachably connected to the distal end of the housing. The distal end of the control component is housed within the housing and is rotatable relative to the housing. The proximal end of the wire passes through the rear handle, enters the second side support, and then enters the housing before connecting to the control component.

8. The support system as described in claim 7, characterized in that: The control component includes a control component body disposed on the distal side and a rotating part disposed on the proximal side of the control component body. The control component body is housed within the housing, and the rotating part is exposed outside the housing. A wire hole is provided on the inner wall of the distal end of the housing. The proximal end of the pull wire passes through the wire hole and connects to the control component body. Rotating the rotating part can cause the proximal end of the pull wire to coil around the outer surface of the control component body.

9. The support system as described in claim 8, characterized in that: The control component body is provided with a plurality of first locking structures, which are evenly spaced on the outer surface of the control component body in the circumferential direction. The proximal end of the first locking structure is provided with a first inclined structure. The inner side of the proximal end of the housing is provided with a first limiting structure, and the distal end of the first limiting structure is provided with a second inclined structure. When the control component moves toward the proximal end, the first limiting structure can enter the gap between two adjacent first locking structures.

10. The support system as described in claim 9, characterized in that: A second locking structure is provided on the outer surface of the main body of the control component. The second locking structure is located on the proximal side of the first locking structure. A third inclined structure is provided at the proximal end of the second locking structure. A through hole is provided at the proximal end of the housing for the main body of the control component to pass through. A second limiting structure is formed by protruding inward on the inner sidewall of the through hole. A fourth inclined structure is provided at the distal end of the second limiting structure. When the control component moves towards the proximal end, the second locking structure passes through the second limiting structure and is located on the proximal side of the second limiting structure.

11. The support system as described in claim 8, characterized in that: The control component also includes a torsion spring, the distal end of which is connected to the inner wall of the distal end of the housing, and the proximal end of which is connected to the distal side of the control component body.

Images