Support

Abstract

The utility model relates to a support which comprises a support body and an auxiliary structure, the auxiliary structure is of a bent structure, the auxiliary structure is arranged at the end of the support body, and the auxiliary structure is arranged on the small bent side of the support body. The auxiliary structure is arranged on the support body so that the support body can be bent. The auxiliary structure enables the whole stent main body to be bent, when the stent is released, the stent can be better attached to the bent portion of the blood vessel only by enabling the auxiliary structure to correspond to the bent portion of the blood vessel and then releasing the auxiliary structure, namely the stent can better adapt to bending of the blood vessel, the wall attaching performance of the stent is enhanced, and the stent can be conveniently used. And the I-shaped inner leakage caused by the beak phenomenon of the bracket is avoided.

Description

Technical Field

[0001] The utility model relates to the field of interventional medicine, in particular to a stent. Background Art

[0002] The traditional treatment for aortic disease is open surgery. Traditional open surgery for aortic aneurysm and aortic dissection is highly traumatic, has a high mortality rate, a long operation time, a high incidence of postoperative complications, and high surgical difficulty. Nowadays, endovascular aortic repair (EVAR) technology has matured and become another effective treatment method. It has been widely cited in clinical practice due to its simple surgical operation, less trauma, shorter operation time, and easier acceptance by patients, and has gradually become a method for treating aortic disease.

[0003] The most common endovascular repair procedures for EVAR are fenestration and chimney procedures. After the large stent is released, due to the angle of the aortic arch, the stent's small bend side has poor wall adhesion, which easily forms a bird's beak phenomenon and causes type I endoleak. If intervention is not timely, the continued increase in intracavitary pressure of the aortic aneurysm may cause the aneurysm cavity to rupture, or the aortic dissection rupture cannot be isolated, and the false lumen cannot be thrombosed. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model provides a new type of bracket.

[0005] The solution to the technical problem of the utility model is to provide a stent for interventional treatment of vascular lesions, the stent comprising a stent body and an auxiliary structure, the auxiliary structure being a curved structure, the auxiliary structure being arranged at the end of the stent body, and the auxiliary structure being arranged on the less curved side of the stent body, the auxiliary structure being arranged on the stent body to cause the stent body to bend.

[0006] In some embodiments of the present invention, the number of the auxiliary structures is two, and the two auxiliary structures are respectively arranged on the large curved side and the small curved side of the bracket body; the auxiliary structure is arranged at the end of the bracket body, the auxiliary structure includes an annular structure, the auxiliary structure includes a first end, a second end, a first side and a second side, the first side and the second side are arranged opposite to each other and connected between the first end and the second end, the first end and the second end are bent in the same direction to make the auxiliary structure a curved structure.

[0007] In some embodiments of the present invention, the first end portion and the second end portion include an arc-shaped structure and / or a wave-shaped structure.

[0008] In some embodiments of the present invention, the angle between the tangent direction of both ends of the first end and the second end and the tangent direction of the ends of the first side and the second side is in the range of 150 degrees to 170 degrees.

[0009] In some embodiments of the utility model, the auxiliary structure is an annular structure, and the auxiliary structure includes a first section and a second section, the first section and the second section are V-shaped structures, the two free ends of the first section are connected one by one with the two free ends of the second section, and the first section and the second section are set at an angle, and the angle between the plane where the first section is located and the plane where the second section is located ranges from 110 degrees to 170 degrees.

[0010] In some embodiments of the present invention, the auxiliary structure includes a linear structure and / or a curved structure, and the length direction of the auxiliary structure is consistent with the length direction of the bracket body.

[0011] In some embodiments of the present invention, an anchoring structure is provided on a side of the auxiliary structure away from the central axis of the support body, and / or a damping structure is provided on the auxiliary structure.

[0012] In some embodiments of the present invention, the anchoring structure includes barbs, and the damping structure includes a suture wound around the auxiliary structure.

[0013] In some embodiments of the present invention, the stent body includes a coating and a plurality of coils, the coating includes an inner coating and an outer coating, the plurality of coils are spaced apart between the inner coating and the outer coating, and the auxiliary structure is disposed between two adjacent coils.

[0014] In some embodiments of the present invention, the stent body includes a coating and a plurality of coils, the plurality of coils are arranged on the outer surface of the coating at intervals, and the auxiliary structure is arranged on the outer surface of the coating in a stacked manner with one of the coils.

[0015] Compared with the prior art, a stent of the utility model has the following advantages: the stent includes a stent body and an auxiliary structure, the auxiliary structure is a curved structure, and the auxiliary structure causes the stent body to bend as a whole. When releasing the stent, it is only necessary to align the auxiliary structure with the curved part of the blood vessel and then release it, so that the stent can better fit the curved part of the blood vessel, that is, the stent can better adapt to the curvature of the blood vessel, enhance the wall adhesion of the stent, and avoid the situation of type I internal leakage caused by the bird's beak phenomenon of the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the structure of the bracket in a bent state provided by the first embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the front structure of the bracket provided in the first embodiment of the utility model.

[0018] Figure 3 It is a schematic diagram of the auxiliary structure of the bracket provided in the first embodiment of the utility model.

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the stent provided in the first embodiment of the utility model loaded in the sheath tube.

[0020] Figure 5 It is another auxiliary structural schematic diagram of the bracket provided in the first embodiment of the utility model.

[0021] Figure 6 It is a schematic diagram of the support structure provided by the second embodiment of the utility model.

[0022] Figure 7 It is a schematic diagram of the auxiliary structure of the bracket provided in the second embodiment of the utility model.

[0023] Figure 8 It is a schematic diagram of the support structure provided by the third embodiment of the utility model.

[0024] Fig. 9 This is a schematic diagram of another bracket structure provided by the third embodiment of the present utility model.

[0025] Fig.10 It is a schematic diagram of the support structure provided by the fourth embodiment of the utility model.

[0026] Explanation of the accompanying drawings: 100, stent; 11, stent body; 12, auxiliary structure; 121, first end; 122, second end; 123, first side; 124, second side; 101, sheath; 102, positioning structure; 111, coating; 112, wave ring; 200, stent; 22, auxiliary structure; 221, first section; 222, second section; 300, stent; 31, stent body; 32, auxiliary structure; 400, stent; 41, stent body; 42, auxiliary structure; 411, coating; 412, wave ring. DETAILED DESCRIPTION

[0027] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0029] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0030] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will 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 can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0031] In order to more clearly describe the structure of the present application, the terms "proximal end" and "distal end" are defined herein as commonly used terms in the field of interventional medicine. Specifically, "distal end" refers to the end away from the operator during the surgical operation, "proximal end" refers to the end close to the operator during the surgical operation, "axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial" direction.

[0032] See also Figure 1 The first embodiment of the utility model provides a stent 100 for interventional treatment of vascular lesions, and is particularly suitable for lesions in the aortic arch. In the first embodiment of the utility model, the stent 100 is described in detail by taking a stent for treating lesions in the aortic arch as an example. The stent 100 includes a stent body 11 and an auxiliary structure 12. The stent body 11 is a tubular structure. The auxiliary structure 12 is pre-bent and shaped to be a curved structure. The auxiliary structure 12 is arranged on the stent body 11. Since the auxiliary structure 12 is a curved structure, after the auxiliary structure 12 is arranged on the stent body 11, it will drive the stent body 11 to bend at the position where the auxiliary structure 12 is arranged, thereby making the stent body 11 curved as a whole.

[0033] If the stent 100 is a straight tube structure, when the stent 100 enters a curved blood vessel, the stent 100 will bend along the direction of the blood vessel curvature to adapt to the curvature of the blood vessel. At this time, the stent 100 has a tendency to return to a straight tube shape, so the outer wall of the stent 100 will not be able to contact the blood vessel wall, thereby causing a large gap between the outer wall of the stent 100 and the blood vessel wall, resulting in the bird's beak phenomenon and type I internal leakage. The auxiliary structure 12 causes the stent body 11 to bend at the position where the auxiliary structure 12 is set. When releasing the stent 100, it is only necessary to align the auxiliary structure 12 with the curved part of the blood vessel and then release it, so that the stent 100 can better fit the curved part of the blood vessel, such as the aortic arch, that is, the stent 100 can better adapt to the curvature of the blood vessel. Enhance the wall adhesion of the stent 100 to avoid the type I internal leakage caused by the bird's beak phenomenon of the stent 100.

[0034] See also Figure 2 In the first embodiment of the utility model, the auxiliary structure 12 is an annular structure, the auxiliary structure 12 is arranged at the end of the bracket body 11, and the auxiliary structure 12 is arranged on the side of the bracket body 11 as a whole. That is, the overall size of the auxiliary structure 12 is smaller than the overall size of the bracket body 11, and the auxiliary structure 12 is arranged on the side of the small curved side of the bracket body 11. Since the bracket body 11 has a strong support at the end, when the bracket body 11 is bent at the end, the end of the bracket body 11 has a strong tendency to restore to its original state. Therefore, when the bracket body 11 is bent at the end, the bracket 100 is very likely to have a bird's beak phenomenon. Therefore, the auxiliary structure 12 is arranged at the end of the bracket body 11, so that the end of the bracket 100 is bent, so as to avoid the occurrence of the bird's beak phenomenon to the greatest extent, thereby avoiding type I internal leakage. At the same time, when the stent 100 is bent, the bending degree of the small curved side is the largest, so the auxiliary structure 12 is arranged on the small curved side of the stent body 11, so that the small curved side of the stent 100 is affected by the auxiliary structure 12 and produces a larger bending degree, so that the small curved side of the stent 100 can better fit the blood vessel wall, further avoiding the occurrence of the bird's beak phenomenon, and thus avoiding type I endoleak. The annular auxiliary structure 12 is arranged at the end of the stent 100, and the support of the end of the stent 100 can also be increased to ensure that the end of the stent 100 can be firmly anchored in the blood vessel.

[0035] In the first embodiment of the utility model, the number of the auxiliary structure 12 is one, which is arranged on the small curved side of the bracket 100. It can be understood that the side of the bracket 100 on which the auxiliary structure 12 is arranged is the small curved side. In other specific embodiments of the utility model, the number of the auxiliary structure 12 can also be two, and the two auxiliary structures 12 are respectively arranged on the large curved side and the small curved side of the bracket 100.

[0036] See also Figure 3 and Figure 4The auxiliary structure 12 includes a first end 121, a second end 122, a first side 123, and a second side 124. One end of the first end 121 is connected to one end of the first side 123, the other end of the first side 123 is connected to one end of the second end 122, the other end of the second end 122 is connected to one end of the second side 124, and the other end of the second side 124 is connected to the other end of the first end 121, so that the auxiliary structure 12 is a closed ring structure. The first end 121 and the second end 122 are bent in the same direction so that the auxiliary structure 12 is a curved structure. It can be understood that the stent 100 needs to be transported to the lesion position by a conveyor, and the stent 100 needs to be compressed and loaded in the sheath 101 of the conveyor, and a locking structure 102 is provided in the sheath 101, and the locking structure 102 is used to increase the friction between the stent 100 and the sheath 101 to prevent the stent 100 from moving when the sheath 101 is withdrawn and affecting the release of the stent 100. When the stent 100 is compressed and loaded in the sheath 101, the auxiliary structure 12 will be compressed into a flat segment-shaped structure, and the auxiliary structure 12 can be engaged with the locking structure 102, that is, the first end 121 and the second end 122 are respectively against the far and near ends of the locking structure 102, and the first side 123 and the second side 124 pass over the locking structure 102, so that the auxiliary structure 12 is engaged with the locking structure 102 to limit the axial movement of the stent 100. It is further prevented that the sheath 101 drives the stent 100 to move when withdrawing, thereby preventing the sheath 101 from withdrawing and affecting the release of the stent 100. When the stent 100 is released, the stent 100 is unfolded, the auxiliary structure 12 is unfolded into a ring structure, and the locking structure 102 can be separated from the ring-shaped auxiliary structure 12, thereby ensuring the normal release of the stent 100. It should be noted that the first side 123 and the second side 124 can be linear structures, and the lengths of the first side 123 and the second side 124 are similar to the length of the locking structure 102. At this time, the first side 123 and the second side 124 are parallel to each other in the length direction of the locking structure 102 in the sheath 101, the first side 123 and the second side 124 can fully fit with the locking structure 102, and the first end 121 and the second end 122 can just abut against the two ends of the locking structure 102 to further enhance the locking effect between the auxiliary structure 12 and the locking structure 102 to avoid axial displacement of the bracket 100.In other specific embodiments of the present invention, the first side 123 and the second side 124 may also be arc-shaped structures, so that the overall shape of the auxiliary structure 12 is more similar to the curved blood vessel wall, thereby making the auxiliary structure 12 as a whole more closely fit the blood vessel wall, thereby ensuring the overall wall adhesion of the stent 100.

[0037] See also Figure 3 In the first embodiment of the utility model, the first end 121 and the second end 122 are configured as arc-shaped structures, and the first end 121 and the second end 122 are bent toward the outer side of the auxiliary structure 12. Configuring the first end 121 and the second end 122 as the above-mentioned structure can reduce the force required for compressing the auxiliary structure 12, and can ensure that the auxiliary structure 12 is in a line segment-shaped structure after being compressed, thereby minimizing the size of the auxiliary structure 12 in the circumferential direction of the stent 100 after being compressed. Reducing the force required for compressing the auxiliary structure 12 can ensure that the stent 100 can be more easily compressed and loaded into the sheath 101. Reducing the size of the auxiliary structure 12 in the circumferential direction of the stent 100 after being compressed can ensure that the overall size of the stent 100 after compression is smaller, thereby preventing the stent 100 from being unable to be loaded into the sheath 101 due to its larger size. In other specific embodiments of the utility model, the shapes of the first end 121 and the second end 122 can also be wavy, such as Figure 5 As shown, the force required for compressing the auxiliary structure 12 can be further reduced.

[0038] Further, please continue Figure 4 , the angle α between the tangent direction of the first end 121 and the second end 122 and the tangent direction of the first side 123 and the second side 124 is 150-170 degrees. Setting the angle α at 150-170 degrees can be applied to most fenestration surgeries of aortic arch lesions.

[0039] In order to ensure that the stent 100 will not be displaced due to the impact of blood flow and the pulsation of the blood vessel after being deployed in the blood vessel, an anchoring structure (not shown) is provided on the side of the auxiliary structure 12 away from the central axis of the stent body 11, and the anchoring structure includes barbs. When the stent 100 is deployed in the blood vessel, the barbs on the auxiliary structure 12 can penetrate into the blood vessel wall, thereby enhancing the stability of the stent 100 anchored in the blood vessel. A damping structure (not shown) can also be provided on the auxiliary structure 12, and the damping structure includes a suture wound on the auxiliary structure 12, that is, the friction between the stent 100 and the blood vessel wall is increased by the suture, thereby enhancing the stability of the stent 100 anchored in the blood vessel.

[0040] For further information, please refer to Figure 2 In the first embodiment of the utility model, the support body 11 includes a coating 111 and a plurality of corrugations 112, wherein the plurality of corrugations 112 are arranged at intervals on the outer surface of the coating 111, and the auxiliary structure 12 is arranged on the outer surface of the coating 111 in a stacked manner with one of the corrugations 112, and the auxiliary structure 12 is arranged on the outer side of the corrugation 112, and the bending direction of the auxiliary structure 12 is toward the inner side of the corrugation 112. It can be understood that the auxiliary structure 12 is stacked with one of the corrugations 112 on the coating 111 to ensure the overall bending degree of the support body 11, because the coating 111 is made of a flexible material, when the auxiliary structure 12 is only arranged on the coating 111, it may cause the position of the coating 111 where the auxiliary structure 12 is arranged to form only a depression, and cannot drive the support body 11 to bend as a whole. When the auxiliary structure 12 and one of the wave coils 112 are overlapped and arranged on the outer surface of the coating 111, and the auxiliary structure 12 is arranged on the outer side of the wave coil 112, and the bending direction of the auxiliary structure 12 is consistent with the bending direction of the small curved side of the bracket body 11, the auxiliary structure 12 will squeeze the overlapped wave coil 112, thereby causing the wave coil 112 to deform. When the wave coil 112 is deformed, it will lead to a certain deformation of the coating 111 in a surrounding area. When the coating 111 in an area is deformed, the wave coil 112 near the area will also be affected and deformed, thereby causing the area of ​​the bracket body 11 where the auxiliary structure 12 is arranged to bend, so that the bracket 100 can bend as a whole, rather than just causing a depression at a certain place on the coating 111.

[0041] In other specific embodiments of the utility model, the coating 111 may include two layers of coating, an inner coating and an outer coating, a plurality of the corrugations 112 are arranged between the inner coating and the outer coating at intervals, and the auxiliary structure 12 is arranged between two adjacent corrugations 112. By setting two layers of coating, and setting a plurality of the corrugations 112 between the two layers of coating, the integrity of the stent 100 can be increased. At this time, even if the auxiliary structure 12 is only arranged on the coating 111, due to the good integrity of the stent 100, the coating 111 can also drive the area near the auxiliary structure 12 to produce bending deformation. Under the premise of ensuring that the stent 100 can produce bending deformation as a whole, the corrugations 112 and the auxiliary structure 12 are wrapped by the coating 111, so that the surface of the stent 100 is smoother, reducing the risk of the stent 100 scratching the blood vessel wall. At the same time, the auxiliary structure 12 is disposed between two adjacent coils 112 , and the auxiliary structure 12 does not need to be overlapped with the coils 112 , thereby reducing the thickness of the stent 100 and ensuring that the stent 100 can be smoothly loaded into the sheath tube 101 .

[0042] See also Figure 6 and Figure 7 The second embodiment of the utility model provides a bracket 200. The main difference between the bracket 200 and the bracket 100 of the first embodiment of the utility model is that the auxiliary structure 22 includes a first section 221 and a second section 222. The first section 221 and the second section 222 are V-shaped structures. The two free ends of the first section 221 are connected to the two free ends of the second section 222 in a one-to-one correspondence, and the first section 221 and the second section 222 are set at an angle. The angle β between the first section 221 and the second section 222 is 110 degrees-170 degrees, that is, the auxiliary structure 22 is a diamond structure as a whole. It can be understood that the first section 221 and the second section 222 are V-shaped structures, so that the first section 221 and the second section 222 are more convenient to compress, and the two free ends of the first section 221 are connected to the two free ends of the second section 222 in a one-to-one correspondence to form a diamond structure, which can ensure the overall support of the auxiliary structure 22, thereby increasing the overall support and wall adhesion of the bracket 200. The angle β between the first section 221 and the second section 222 is set to 110 degrees to 170 degrees, which is suitable for most fenestration surgeries of aortic arch lesions. The V-shaped tips of the first section 221 and the second section 222 can be set to be arc transitions, thereby preventing the auxiliary structure 22 from scratching the blood vessel wall. At the same time, the connection between the first section 221 and the second section 222 can also be arc transitions, further preventing the auxiliary structure 22 from scratching the blood vessel wall.

[0043] See also Figure 8The third embodiment of the utility model provides a stent 300. The main difference between the stent 300 and the stent 100 provided in the first embodiment of the utility model is that the auxiliary structure 32 is a linear structure. Specifically, the auxiliary structure 32 can be a straight guide wire. The guide wire is pre-bent and shaped, and then the pre-bent guide wire is set on the stent body 31, so that the stent body 21 adapts to the shape of the guide wire and bends. Furthermore, the length direction of the auxiliary structure 32 is consistent with the length direction of the stent body 31. Since the auxiliary structure 32 is a linear structure, the auxiliary structure 32 has almost no effect on the compression of the stent 300. Therefore, setting the auxiliary structure 32 as a linear structure and keeping the length direction of the auxiliary structure 32 consistent with the length direction of the stent body 31 can ensure that the stent 300 will not be affected by the auxiliary structure 32 during compression, and can ensure that the volume of the stent 300 after compression is small. In other specific embodiments of the utility model, the auxiliary structure 32 can also be a curved structure, such as a guide wire with a curved shape, such as Fig. 9 The curved guide wire is then pre-bent and shaped to form the auxiliary structure 32. The auxiliary structure 32 is configured as a curved structure to enhance the overall strength of the auxiliary structure 32 and prevent the auxiliary structure 32 from breaking due to bending.

[0044] See also Fig.10 The fourth embodiment of the utility model provides a stent 400. The main difference between the stent 400 and the stent 100 provided in the first embodiment of the utility model is that the auxiliary structure 42 is an annular structure sleeved on the stent body 41, that is, the auxiliary structure 42 can be one or more pre-bent corrugations 412. In the fourth embodiment of the utility model, the corrugations 412 are directly pre-bent, and then the corrugations 412 are arranged on the coating 411. The pre-bent corrugations are the auxiliary structures 42, which can omit the steps of making the auxiliary structures 42 and setting the separate auxiliary structures 42 on the stent body 41, thereby reducing the manufacturing cost and difficulty of the stent 400.

[0045] Compared with the prior art, a stent of the utility model has the following advantages: the stent includes a stent body and an auxiliary structure, the auxiliary structure is a curved structure, and the auxiliary structure causes the stent body to bend as a whole. When releasing the stent, it is only necessary to align the auxiliary structure with the curved part of the blood vessel and then release it, so that the stent can better fit the curved part of the blood vessel, that is, the stent can better adapt to the curvature of the blood vessel, enhance the wall adhesion of the stent, and avoid the situation of type I internal leakage caused by the bird's beak phenomenon of the stent.

[0046] 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 in the protection scope of the present invention.

Claims

1. A stent for interventional treatment of vascular lesions, characterized in that: The support includes a support body and an auxiliary structure, wherein the auxiliary structure is a curved structure, and the auxiliary structure is arranged at the end of the support body and on the small curved side of the support body. The auxiliary structure is arranged on the support body to make the support body bend.

2. The bracket according to claim 1, characterized in that: The number of the auxiliary structures is two, and the two auxiliary structures are respectively arranged on the large curved side and the small curved side of the bracket body; the auxiliary structure includes an annular structure, and the auxiliary structure includes a first end, a second end, a first side and a second side, the first side and the second side are arranged opposite to each other and connected between the first end and the second end, and the first end and the second end are bent in the same direction to make the auxiliary structure a curved structure.

3. The bracket according to claim 2, characterized in that: The first end and the second end include an arc-shaped structure and / or a wave-shaped structure.

4. The bracket according to claim 2, characterized in that: The angle between the tangent direction of both ends of the first end and the second end and the tangent direction of the ends of the first side and the second side is in the range of 150 degrees to 170 degrees.

5. The bracket according to claim 1, characterized in that: The auxiliary structure is an annular structure, and the auxiliary structure includes a first section and a second section. The first section and the second section are V-shaped structures. The two free ends of the first section are connected to the two free ends of the second section one by one, and the first section and the second section are set at an angle. The angle between the plane where the first section is located and the plane where the second section is located ranges from 110 degrees to 170 degrees.

6. The bracket according to claim 1, characterized in that: The auxiliary structure includes a linear structure and / or a curved structure, and the length direction of the auxiliary structure is consistent with the length direction of the bracket body.

7. The bracket according to claim 1, characterized in that: An anchoring structure is arranged on a side of the auxiliary structure away from the central axis of the support body, and / or a damping structure is arranged on the auxiliary structure.

8. The bracket according to claim 7, characterized in that: The anchoring structure includes barbs, and the damping structure includes a suture wound around the auxiliary structure.

9. The bracket according to any one of claims 1 to 8, characterized in that: The stent body includes a coating and a plurality of corrugations, the coating includes an inner coating and an outer coating, the plurality of corrugations are arranged between the inner coating and the outer coating at intervals, and the auxiliary structure is arranged between two adjacent corrugations.

10. The bracket according to any one of claims 1 to 8, characterized in that: The support body includes a coating and a plurality of corrugations, wherein the plurality of corrugations are arranged on the outer surface of the coating at intervals, and the auxiliary structure is arranged on the outer surface of the coating in a stacked manner with one of the corrugations.

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