Bracket with fins
By designing a winged stent that abuts against the inner wall of the organ, the problem of easy displacement of plastic stents is solved, achieving a stable drainage channel and enhanced stent-cavity fit, suitable for scenarios such as the common bile duct and duodenum.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-03-13
AI Technical Summary
The plastic stents used in existing technologies are prone to displacement during drainage, resulting in poor stability.
A winged stent is designed, comprising a stent body and first and second wing assemblies spaced apart along the axial direction. The wings are connected to the outer wall of the stent body and are inclined in opposite directions. The ends of the wings abut against the inner wall of the organ to prevent the stent from moving.
It effectively prevents stent displacement between organs, establishes a stable drainage channel, enhances the tissue fit between the stent and the cavity, reduces the risk of leakage and blockage, and is suitable for scenarios such as the common bile duct and duodenum.
Smart Images
Figure CN223987954U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical devices, and more specifically, to a winged stent. Background Technology
[0002] In existing technologies, plastic stents are used for drainage when the stomach or intestines face the bile duct or pancreatic bile duct.
[0003] Using plastic stents for drainage presents the problem of the stents easily shifting. Utility Model Content
[0004] The purpose of this application is to provide a bracket with winglets to alleviate the technical problem of easy displacement of plastic brackets in the prior art.
[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:
[0006] The wing-shaped bracket provided by this utility model includes a bracket body, a first wing assembly, and at least one second wing assembly;
[0007] The first wing assembly and the second wing assembly are spaced apart along the axial direction of the support body;
[0008] Both the first wing assembly and the second wing assembly include at least two wings, and multiple wings within the same wing assembly are spaced apart along the circumferential direction of the support body; each wing is connected to the outer wall of the support body and is arranged at an angle to the axis of the support body;
[0009] The multiple blades within the same blade assembly have the same tilt direction, and the tilt direction of the blades in the first blade assembly is opposite to the tilt direction of the blades in the second blade assembly.
[0010] Furthermore, multiple blades within the same blade assembly are offset along the axial direction of the support body.
[0011] Furthermore, the winglet includes a connecting end and a free end, the connecting end being connected to the outer wall of the support body, and the free end being an arc shape protruding away from the connecting end.
[0012] Furthermore, the vertical distance between the free end and the outer peripheral wall of the support body is greater than or equal to 2 mm.
[0013] Furthermore, the angle between the plane containing the wing and the axis of the support body is greater than or equal to 30° and less than 90°.
[0014] Furthermore, the width of the free end is greater than the width of the connected end.
[0015] Furthermore, the width of the free end is smaller than the width of the connected end.
[0016] Furthermore, the wing is covered with a film.
[0017] Furthermore, the winglet is integrally formed with the support body.
[0018] Furthermore, the support body is configured as a tubular structure woven by braided threads extending spirally along the axial direction;
[0019] The support body has a number of first braided filaments in the first helical direction and a number of second braided filaments in the second helical direction distributed in the circumferential direction. The braided filaments in the first helical direction and the braided filaments in the second helical direction are alternately pressed together.
[0020] The first helical braided thread is pulled out from below the second helical braided thread and twisted to form the wing.
[0021] Furthermore, the support body is configured as a tubular structure woven by braided threads extending spirally along the axial direction;
[0022] The support body has several first braided filaments in the first helical direction and several second braided filament loops in the second helical direction distributed in the circumferential direction. The braided filaments in the first helical direction and the braided filaments in the second helical direction are alternately pressed together.
[0023] Using one of the second spiral direction braided threads as a reference braided thread, the first spiral direction braided thread is drawn out from below the second spiral direction braided thread adjacent to the reference braided thread and extends to another second spiral direction braided thread adjacent to the reference braided thread.
[0024] Furthermore, the winglet and the support body are separate structures, and the two are fixedly connected.
[0025] Furthermore, when multiple second wing assemblies are provided, the multiple second wing assemblies are spaced apart along the axial direction of the support body, and the multiple second wing assemblies are located on the same side of the first wing assembly.
[0026] Furthermore, let L1 be the distance between the contact point between the blade of the first blade assembly and the support body and the contact point between the blade of the adjacent second blade assembly and the support body, and let L2 be the total length of the support body, where 10% < L1 / L2 < 90%.
[0027] Let L3 be the distance between the contact points of the blades of two adjacent second blade assemblies and the support body, and 1% < L3 / L2 < 50%.
[0028] Furthermore, the stent body includes at least one compact segment and at least one sparse segment, the compact segment being connected to the sparse segment, and the sparse segment having a greater degree of flexibility than the compact segment.
[0029] Furthermore, the dense segment and the sparse segment are connected by a connecting line.
[0030] Based on the above technical solutions, the technical effects achievable by this utility model can be analyzed as follows:
[0031] The wing-equipped bracket provided by this utility model includes a bracket body, a first wing assembly, and at least one second wing assembly; the first wing assembly and the second wing assembly are spaced apart along the axial direction of the bracket body; each of the first wing assembly and the second wing assembly includes at least two winglets, and multiple winglets within the same wing assembly are spaced apart along the circumferential direction of the bracket body; each winglet is connected to the outer wall of the bracket body and is angled to the axis of the bracket body; the multiple winglets within the same wing assembly have the same tilt direction, and the tilt direction of the winglets in the first wing assembly is opposite to the tilt direction of the winglets in the second wing assembly.
[0032] Multiple flaps within the same flap assembly are connected at an angle to the outer wall of the stent body. The stent body overlaps between two organs, and the ends of the flaps abut against the inner wall of one of the organs, preventing the stent body from moving towards the other organ and solving the problem of easy displacement of plastic stents. For example, when a stable and effective channel for bile drainage needs to be established between the common bile duct and the duodenum, the two ends of the stent body extend into the common bile duct and the duodenum, respectively. The first flap assembly is located in the common bile duct, which prevents the stent body from moving towards the duodenum; the second flap assembly is located in the duodenum, which prevents the stent body from moving towards the common bile duct. Attached Figure Description
[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 A schematic diagram of the structure of the winged bracket provided in the embodiment of this application from a first-view perspective;
[0035] Figure 2 A schematic diagram of the structure of the wing-shaped bracket provided in the embodiment of this application from a second perspective;
[0036] Figure 3 A schematic diagram of the structure of the wing-shaped bracket provided in the embodiments of this application from a third-person perspective;
[0037] Figure 4 A front view of a wing-shaped bracket provided in an embodiment of this application (with multiple winglets axially misaligned);
[0038] Figure 5 A side view of a wing-shaped bracket provided in an embodiment of this application (with multiple winglets axially misaligned);
[0039] Figure 6 A side view of another embodiment of the winged bracket provided in this application;
[0040] Figure 7 A schematic diagram of a first embodiment of the wing in the wing-shaped bracket provided in this application;
[0041] Figure 8 A schematic diagram illustrating a second embodiment of the wing in the wing-shaped bracket provided in this application.
[0042] Figure 9 A schematic diagram of a winged bracket provided in an embodiment of this application;
[0043] Figure 10 This is a schematic diagram illustrating the use of the winged bracket provided in an embodiment of this application.
[0044] icon:
[0045] 100 – Support body; 110 – Connecting section; 120 – Non-connecting section; 130 – Braided thread in the first helical direction; 140 – Braided thread in the second helical direction; 150 – Base braided thread; 160 – Tight section; 170 – Sparse section; 180 – Connecting thread;
[0046] 210 – First wing assembly; 220 – Second wing assembly; 230 – Wing; 231 – Connecting end; 232 – Free end. Detailed Implementation
[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0048] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0049] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0050] See Figures 1 to 6 The wing-shaped bracket provided in this embodiment of the present invention includes a bracket body 100, a first wing assembly 210, and at least one second wing assembly 220. The first wing assembly 210 and the second wing assembly 220 are spaced apart along the axial direction of the bracket body 100. Both the first wing assembly 210 and the second wing assembly 220 include at least two winglets 230. Multiple winglets 230 in the same wing assembly are spaced apart along the circumferential direction of the bracket body 100. Each winglet 230 is connected to the outer wall of the bracket body 100 and is angled to the axis of the bracket body 100. The multiple winglets 230 in the same wing assembly have the same tilt direction, and the tilt direction of the winglets 230 in the first wing assembly 210 is opposite to the tilt direction of the winglets 230 in the second wing assembly 220.
[0051] Specifically, the stent body 100 is made of metal and has a coating. Of course, the stent body 100 may also be made of other elastic materials, which should also be within the scope of protection of this utility model embodiment. Furthermore, the stent body 100 is made of implantable metal wires such as stainless steel wire or shape memory alloy wire; and the stent body 100 has a mesh structure formed by the metal wires. Preferably, the film covering the stent body 100 is a special membrane material, such as polytetrafluoroethylene, polyester, etc., so that the winged stent retains the function of a metal stent while also possessing the characteristics of a membrane material. More preferably, the outer diameter of the stent body 100 is set to 4-15 mm. It is worth noting that both the stent body 100 and the wing 230 can be compressed into the implanter, and the stent body 100 can be smoothly released. When multiple second wing assemblies 220 are provided, the multiple second wing assemblies 220 are spaced apart along the axial direction of the stent body 100, and the multiple second wing assemblies 220 are located on the same side of the first wing assembly 210.
[0052] The wing 230 within the same wing assembly is connected at an angle to the outer wall of the stent body 100. The stent body 100 overlaps between two organs, and the end of the wing 230 abuts against the inner wall of one of the organs, preventing the stent body 100 from moving towards the other organ and solving the problem of stent displacement. The stent body 100 is made of metal, which has high elasticity, toughness, and strength, improving the elasticity of the stent body 100 and ensuring a tight fit between the stent body 100 and the tissue of the cavity, making the winged stent less prone to leakage. At the same time, it reduces the stent wall thickness, thereby increasing the inner diameter of the stent body 100 and preventing stent blockage. In addition, the stent body 100 has a coating, enhancing the surface smoothness of the stent body 100. See also Figure 10 When a stable and effective channel for bile drainage needs to be established between the common bile duct and the duodenum, the two ends of the stent body 100 extend into the common bile duct and the duodenum, respectively. The first wing assembly 210 is located in the common bile duct, and the second wing assembly 220 is located in the duodenum. The first wing assembly 210 prevents the stent body 100 from moving towards the duodenum, and the second wing assembly 220 prevents the stent body 100 from moving towards the common bile duct. Furthermore, there can be two or three second wing assemblies 220, depending on actual needs. The tilt direction of the wing 230 in the first wing assembly 210 is opposite to the tilt direction of the wing 230 in the second wing assembly 220, so that the wing 230 in both the first wing assembly 210 and the second wing assembly 220 can serve a limiting function. Having multiple second wing assemblies 220 allows for application in different medical scenarios, increasing the applicability of winged stents.
[0053] The structure and shape of the winged support are described in detail below:
[0054] In the optional embodiments of this utility model, see Figure 4 and Figure 5 Multiple blades 230 within the same blade assembly are offset along the axial direction of the support body 100.
[0055] Specifically, the staggered arrangement of multiple vanes 230 within the same vane assembly along the axial direction of the support body 100 means that, within the same vane assembly, the connection point between at least one vane 230 and the support body 100 is not on the same annular line as the connection points between other vanes 230 and the support body 100. For example: See [link to example]. Figure 5 The first winglet assembly 210 contains a total of five winglets 230; see also Figure 4 Three winglets 230 form a group, and the connection points of these three winglets 230 with the support body 100 are in the same vertical plane; another two winglets 230 form a group, and the connection points of these two winglets 230 with the support body 100 are in the same vertical plane; there is a distance 'a' between the vertical plane containing the connection points of the three winglets 230 with the support body 100 and the vertical plane containing the connection points of the two winglets 230 with the support body 100; the vertical plane is perpendicular to the axis of the support body 100. It is worth noting that the distance 'a' between the two vertical planes is very small.
[0056] After interventional treatment with a winged stent, the winged stent experiences a certain amount of torsion. When the winged stent torsions, if the connection points between multiple winglets 230 within the same winglet assembly and the stent body 100 are all in the same plane, some winglets 230 will experience greater force, while others will experience less force or no force, resulting in uneven force distribution. By offsetting the multiple winglets 230 within the same winglet assembly along the axial direction of the stent body 100, it can be ensured that when the winged stent torsions, the ends of multiple winglets 230 can all abut against the interior of the organ, thereby enabling multiple winglets 230 within the same winglet assembly to achieve a limiting effect.
[0057] In the optional embodiments of this utility model, see Figure 2 and Figure 6 The wing 230 includes a connecting end 231 and a free end 232. The connecting end 231 is connected to the outer wall of the support body 100, and the free end 232 is an arc shape that protrudes away from the connecting end 231.
[0058] The free end 232 is arc-shaped, which makes the end of the wing 230 smooth and avoids damage to the organ by the wing 230.
[0059] As one implementation method, see Figure 2 The width of the free end 232 is smaller than the width of the connecting end 231.
[0060] As another implementation method, see Figure 6 The width of the free end 232 is greater than the width of the connecting end 231.
[0061] Specifically, in this embodiment, see Figure 6 The wing 230 is teardrop-shaped, and its width gradually increases from the connecting end 231 to the free end 232. Of course, the wing 230 may also be triangular or trapezoidal, etc., which are all within the protection scope of this utility model embodiment.
[0062] The wide free end 232 increases the contact area between the flap 230 and the inner wall of the organ, thus enhancing the limiting effect.
[0063] In an optional embodiment of this utility model, the vertical distance between the free end 232 and the outer peripheral wall of the support body 100 is greater than or equal to 2mm.
[0064] Specifically, see Figure 4 The vertical distance refers to the distance b between the horizontal plane where the free end 232 of the wing 230 and the connection point of the connecting end 231 and the outer wall of the support body 100 are located; in this embodiment, the vertical distance between the free end 232 and the outer peripheral wall of the support body 100 is set to 2mm, 3mm, or 3.5mm, etc.
[0065] The vertical distance between the free end 232 and the outer peripheral wall of the stent body 100 is greater than or equal to 2 mm, so that the free end 232 can abut against the inner wall of the organ.
[0066] In an optional embodiment of this utility model, the angle between the plane where the wing 230 is located and the axis of the support body 100 is greater than or equal to 30° and less than 90°.
[0067] Specifically, the angle between the plane containing the winglet 230 and the axis of the support body 100 is set to 30°, 45°, or 60°, etc. Furthermore, the angle between the plane containing multiple winglets 230 within the same winglet 230 assembly and the axis of the support body 100 can be set to different angle values, but they need to be tilted in the same direction.
[0068] The angle between the plane of the flap 230 and the axis of the stent body 100 is greater than or equal to 30°. This prevents the free end 232 of the flap 230 from failing to contact the inner wall of the organ if the angle is too small, thus failing to provide proper positioning. The angle between the plane of the flap 230 and the axis of the stent body 100 is less than 90°. When the angle is greater than 90°, the tilt direction of the flap 230 changes, requiring reverse use.
[0069] In an optional embodiment of this utility model, the wing 230 is provided with a coating.
[0070] Specifically, the film on the wing 230 is consistent with the film on the support body 100, which facilitates processing. Of course, the wing 230 may also be uncoated, and the solution of not having a film on the wing 230 should also be within the protection scope of this utility model.
[0071] The flap 230 is covered with a membrane to reduce the adhesion between the flap 230 and the tissue.
[0072] In an optional embodiment of this utility model, the wing 230 is integrally formed with the support body 100.
[0073] Specifically, the support body 100 is made of woven metal wire. During the weaving process, a portion of the metal wire is pulled out at a set position so that the portion of the metal wire extends out of the support body 100 and forms an angle with the support body 100, thereby achieving the integral molding of the wing 230 and the support body 100.
[0074] The wing 230 is integrally formed with the support body 100, which improves the connection strength between the two.
[0075] As one implementation method of one-piece molding, see Figure 7 The support body 100 is configured as a tubular structure formed by spirally extending braided threads along the axial direction. The support body 100 has several first braided threads in a first spiral direction and several second braided threads in a second spiral direction distributed circumferentially. The braided threads 130 in the first spiral direction and the braided threads 140 in the second spiral direction are alternately pressed together. The braided threads 130 in the first spiral direction are pulled out from below the braided threads 140 in the second spiral direction and twisted to form a wing 230. During weaving, the braided threads used to form the wing 230 are pulled out and twisted, supported by a support rod, and fixed by thermoforming.
[0076] As another implementation method of one-piece molding, see Figure 8 The support body 100 is configured as a tubular structure formed by spirally extending braided threads along the axial direction. The support body 100 has several first braided threads in a first spiral direction and several second braided threads in a second spiral direction distributed circumferentially. The braided threads 130 in the first spiral direction and the braided threads 140 in the second spiral direction are alternately pressed together. Taking one of the braided threads 140 in the second spiral direction as a reference braided thread 150, the braided thread 130 in the first spiral direction is drawn out from below the braided thread 140 in the second spiral direction adjacent to the reference braided thread 150 and extends to another braided thread 140 in the second spiral direction adjacent to the reference braided thread 150. During weaving, the braided threads used to form the winglets 230 are drawn out and supported by support rods, and then fixed by thermoforming.
[0077] In another implementation, the wing 230 and the support body 100 are separate structures, and the two are fixedly connected.
[0078] Specifically, the wing 230 and the support body 100 are separate structures, and the connecting end 231 of the wing 230 is bonded to the outer wall of the support body 100. It is worth mentioning that regardless of whether the wing 230 and the support body 100 are an integral structure or separate structures, the wing 230 can be configured as follows: Figure 2 The width of the free end 232 shown is smaller than the width of the connecting end 231, or it is set as follows: Figure 6 The width of the free end 232 shown is greater than the width of the connecting end 231.
[0079] The wing 230 and the support body 100 are separate structures. The support body 100 is manufactured first, and then the wing 230 is installed on the support body 100 that needs to be installed, which facilitates manufacturing.
[0080] In the optional embodiments of this utility model, see Figure 3 The support body 100 includes a connecting section 110 and two non-connecting sections 120. The two non-connecting sections 120 are respectively connected to the two ends of the connecting section 110, and the first wing assembly 210 and the second wing assembly 220 are located in the connecting section 110; the length of the non-connecting section 120 is greater than or equal to 10mm.
[0081] Specifically, the length of the non-connecting segment 120 is less than the length of the connecting segment 110, and greater than or equal to 10 mm; the length of the non-connecting segment 120 is set to 10 mm, 11 mm, or 12.5 mm, etc. The connecting segment 110 and the two non-connecting segments 120 are integrally formed, and the connecting segment 110 and the two non-connecting segments 120 are three regions divided on the support body 100 according to the set length of the non-connecting segment 120. The wing 230 can only be provided within the connecting segment 110, avoiding the wing 230 being located at both ends of the support body 100.
[0082] The wing 230 is located in the connecting section 110 to prevent the wing 230 from being too close to the end face of the bracket body 100, which would cause the wing 230 to flip inward when it flips, thus resulting in a weak limiting effect.
[0083] In the optional embodiments of this utility model, see Figure 3Let L1 be the distance between the contact point of the wing 230 of the first wing assembly 210 and the contact point of the wing 230 of the adjacent second wing assembly 220 and the support body 100, and let L2 be the total length of the support body 100, where 10% < L1 / L2 < 90%; let L3 be the distance between the contact points of the wing 230 of two adjacent second wing assemblies 220 and the support body 100, where 1% < L3 / L2 < 50%. The spacing between two adjacent sets of wing assemblies 230 is set according to the above formula to avoid the distance between two adjacent sets of wing assemblies 230 being too small, which would prevent the limiting effect from being achieved.
[0084] In the optional embodiments of this utility model, see Figure 9 The stent body 100 includes at least one compact segment 160 and at least one sparse segment 170, the compact segment 160 is connected to the sparse segment 170, and the sparse segment 170 has a greater flexibility than the compact segment 160.
[0085] Specifically, during the weaving of the support body 100, the weaving density of the tightly woven section 160 is greater than that of the sparsely woven section 170, making the sparsely woven section 170 more flexible than the tightly woven section 160. This allows the winged support to conform to different orientations of the human body structure, improving human comfort. Furthermore, if the wire diameters of the tightly woven section 160 and the sparsely woven section 170 are different, or if the materials used for the tightly woven section 160 and the sparsely woven section 170 are different, to achieve different levels of flexibility between the tightly woven section 160 and the sparsely woven section 170, this should also be within the scope of protection of this utility model. It is worth noting that the boundary line between the compact section 160 and the sparse section 170 is independent of the position of the first wing assembly 210 and the second wing assembly 220; the boundary line between the compact section 160 and the sparse section 170 can be located between the first wing assembly 210 and the second wing assembly 220, or on the side of the first wing assembly 210 away from the second wing assembly 220, or on the side of the second wing assembly 220 away from the first wing assembly 210, etc.
[0086] In an optional embodiment of this utility model, the dense segment 160 and the sparse segment 170 are connected by a connecting line 180.
[0087] Specifically, in this embodiment, the braiding density of the connecting line 180 is greater than the braiding density of the sparse section 170, so that the smoothness of the connecting line 180 is greater than the smoothness of the sparse section 170.
[0088] The compact section 160 and the sparse section 170 are connected by a connecting line 180, which further enables the wing-shaped support to conform to different orientations of the human body structure and improve human comfort.
[0089] The following is a brief introduction to the operation process of the winged bracket:
[0090] Determine the location of the duodenum and bile duct, and plan the puncture route;
[0091] The guidewire is inserted into the inserter channel, and the inserter is placed at the predetermined puncture point;
[0092] Place the insertion device's puncture tip against the puncture site and press the duodenal wall against the bile duct wall to perform the puncture. The insertion device then enters the common bile duct along the puncture path.
[0093] After successful puncture, the guidewire is inserted into the bile duct;
[0094] Continue inserting the inserter along the guide wire;
[0095] Keep the rear handle in place and begin to retract the front handle until it reaches the limit position (simultaneously observe whether the distal wing 230 is fully opened inside the tube).
[0096] Slightly pull back the inserter to bring the bile duct wall closer to the duodenal wall; release the limit and continue to withdraw the outer tube until the entire stent body 100 is opened in the duodenum and detached from the inserter;
[0097] Retract the guidewire and inserter to complete the release of the winged support.
[0098] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.
[0099] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A stent with wings, characterized in that, The stent comprises a stent body (100), a first wing assembly (210) and at least one second wing assembly (220). The first wing assembly (210) and the second wing assembly (220) are arranged axially spaced apart along the stent body (100). Each of the first wing assembly (210) and the second wing assembly (220) comprises at least two wings (230), and the wings (230) in the same wing assembly are arranged circumferentially spaced apart along the stent body (100); each of the wings (230) is connected to the outer wall of the stent body (100) and is arranged at an angle to the axis of the stent body (100). The wings (230) in the same wing assembly are arranged in the same direction, and the wings (230) in the first wing assembly (210) are arranged in the opposite direction to the wings (230) in the second wing assembly (220). The wings (230) in the same wing assembly are arranged axially offset along the stent body (100).
2. The winged stent of claim 1, wherein, The wing (230) comprises a connection end (231) and a free end (232), the connection end (231) is connected to the outer wall of the stent body (100), and the free end (232) is in the shape of an arc protruding away from the connection end (231).
3. The finned stent of claim 1, wherein, The perpendicular distance between the free end (232) and the peripheral wall of the stent body (100) is greater than or equal to 2mm.
4. The finned stent of claim 3, wherein, The angle between the plane where the wing (230) is located and the axis of the stent body (100) is greater than or equal to 30° and less than 90°.
5. The finned stent of claim 4, wherein, The width of the free end (232) is greater than the width of the connection end (231).
6. The finned stent of claim 3, wherein, The width of the free end (232) is less than the width of the connection end (231).
7. The finned stent of claim 3, wherein, The wing (230) is provided with a film.
8. The finned stent of claim 1, wherein, The wing (230) is integrally formed with the stent body (100).
9. The finned stent of claim 1, wherein, The stent body (100) is provided as a tubular structure formed by weaving the wires spirally along the axial direction.
10. The finned stent of claim 9, wherein, The stent body (100) is provided with a plurality of first weaving wires in a first spiral direction and a plurality of second weaving wires in a second spiral direction, and the first weaving wires (130) and the second weaving wires (140) are alternately pressed together. The first weaving wires (130) are drawn out from below the second weaving wires (140) and twisted to form the wings (230). The stent body (100) is provided as a tubular structure formed by weaving the wires spirally along the axial direction.
11. The finned stent of claim 9, wherein, The stent body (100) is provided with a plurality of first weaving wires in a first spiral direction and a plurality of second weaving wires in a second spiral direction, and the first weaving wires (130) and the second weaving wires (140) are alternately pressed together. The weft thread (130) of the first spiral direction is drawn out from below the weft thread (140) of the second spiral direction adjacent to the reference weft thread (150) and extends to another weft thread (140) of the second spiral direction adjacent to the reference weft thread (150) with the weft thread (140) of the second spiral direction as the reference weft thread (150).
12. The finned stent of claim 1, wherein, The wing (230) and the support body (100) are in a split structure and are fixedly connected.
13. The finned stent of claim 1, wherein, The second wing assembly (220) is provided in plurality, the plurality of second wing assemblies (220) are arranged at intervals along the axial direction of the support body (100), and the plurality of second wing assemblies (220) are located on the same side of the first wing assembly (210).
14. The finned stent of claim 13, wherein, The distance between the contact points of the wing (230) of the first wing assembly (210) and the support body (100) and the contact points of the wing (230) of the second wing assembly (220) adjacent to the first wing assembly (210) is L1, the total length of the support body (100) is L2, and 10% < L1 / L2 < 90%; The distance between the contact points of the wing (230) of the two adjacent second wing assemblies (220) and the support body (100) is L3, and 1% < L3 / L2 < 50%.
15. The winged stent of any of claims 1-14, wherein, The support body (100) comprises at least one compact section (160) and at least one sparse section (170), the compact section (160) is connected with the sparse section (170), and the flexibility of the sparse section (170) is greater than that of the compact section (160).
16. The finned stent of claim 15, wherein, The compact section (160) and the sparse section (170) are connected by a connecting line (180).