Bracket and manufacturing method thereof

Abstract

The present invention relates to a stent and a method for manufacturing the same. The stent comprises a tubular body and a coating, the coating being disposed on the tubular body. The tubular body comprises a mounting member and a plurality of corrugated rings; the plurality of corrugated rings are disposed axially, the mounting member is connected to at least two of the corrugated rings, and the coating is connected to the mounting member and / or the corrugated rings. Thus, when the coating is required to cover the outside or inside of the corrugated rings, the coating does not need to provide a large number of suture points for connecting two adjacent corrugated rings. For example, the coating can be connected only to the axial ends of the stent to achieve coating of the main tubular body, thereby significantly reducing the number of stitch holes in the coating and reducing the possibility of blood leakage through the coating.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a bracket and a manufacturing method thereof. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] Stent grafts are usually used in minimally invasive endovascular interventions to isolate the aortic lesion from the blood flow to achieve therapeutic effects. In the prior art, aortic stent grafts usually use polyester (PET) fabric as the stent coating. Figure 1 、 Figure 2 As shown, the polyester film 41 is connected to the metal stent by sutures. Since the stent usually has multiple annular metal corrugations 42, a large number of needle and thread holes 44 need to be set between the polyester film 41 and the metal corrugations 42. Blood can easily leak from the needle and thread holes 44 and cause internal leakage. Summary of the Invention

[0004] Based on this, it is necessary to provide a stent to reduce the probability of stent coating leakage.

[0005] In order to solve the above technical problems, the present invention provides a stent, comprising a tubular body and a coating, wherein the coating is arranged on the tubular body, and the tubular body comprises a mounting part and multiple circles of wavy rings; the multiple circles of wavy rings are arranged axially, the mounting part is connected to at least two circles of the wavy rings, and the coating is connected to the mounting part and / or the wavy rings.

[0006] Optionally, the mounting component includes a mesh structure.

[0007] Optionally, the mounting member includes a first connecting segment and a second connecting segment, the first connecting segment is connected to the wavy ring and intersects to form the mesh structure, and the two ends of the second connecting segment are respectively connected to two adjacent circles of the wavy ring and / or the second connecting segment.

[0008] Optionally, the mounting component further includes at least one third connecting segment, the third connecting segment is connected to one axial end of the corrugated ring, and the second connecting segment and / or the first connecting segment are connected to the third connecting segment.

[0009] Optionally, the first connecting section includes a first wave peak and a first wave trough, the waveform ring includes a second wave peak and a second wave trough, the first wave peak and the second wave trough are arranged opposite to each other, the first wave trough and the second wave peak are arranged opposite to each other, and the second connecting section is respectively connected to the first wave peak and the second wave trough or respectively connected to the first wave trough and the second wave peak.

[0010] Optionally, the mesh structure includes a connecting ring, and the connecting ring is sleeved on the wave-shaped ring.

[0011] Optionally, the connecting ring is a developing ring.

[0012] Optionally, a connection hole and / or a winding groove is provided on the corrugated ring, and the mounting member is at least partially passed through the connection hole and / or the mounting member is wound around the winding groove.

[0013] The present invention also provides a stent manufacturing method for manufacturing the stent described above, comprising the following steps: providing an elongated mounting member; connecting the corrugated ring and the mounting member to obtain a tubular body; and suturing a covering film to the tubular body to obtain the stent.

[0014] Optionally, providing an elongated mounting component includes: providing at least one connecting wire, and weaving the connecting wires into a mesh structure to obtain the mounting component.

[0015] Compared with the prior art, the stent of the present invention has the following beneficial effects:

[0016] The present invention sets a coating on the tubular main body so that the coating can cooperate with the tubular main body to form a blood flow channel, reduce the flow resistance of blood flow, increase the smoothness of blood flow, and achieve treatment of diseased blood vessels; multiple circles of wavy rings are set at intervals along the axial direction, and two adjacent circles of wavy rings are connected by a mounting part, so that the mounting part can limit the axial displacement of the two adjacent circles of wavy rings, thereby achieving the connection of the two adjacent circles of wavy rings. In this way, when it is necessary to cover the outer side or inner side of the wavy ring, the coating does not need to provide a large number of suture points for connecting the two adjacent circles of wavy rings. For example, the coating can be connected only to the axial ends of the stent to achieve the coating of the main tubular body, thereby greatly reducing the needle and thread holes on the coating and reducing the possibility of blood leakage from the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the unfolded structure of the bracket in the prior art;

[0018] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0019] Figure 3 This is a schematic structural diagram of a mounting component in an embodiment of the present invention that presents a linear structure;

[0020] Figure 4 This is a structural schematic diagram of a connecting hole provided on a corrugated ring in an embodiment of the present invention;

[0021] Figure 5For the present invention Figure 4 A magnified schematic diagram of the structure at point B in FIG.

[0022] Figure 6 This is a structural diagram of a corrugated ring-shaped object provided with winding grooves in an embodiment of the present invention;

[0023] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at position C in FIG;

[0024] Figure 8 Schematic diagram of the deployment structure in which the covering membrane is sutured to both radial sides of the tubular body in an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the expansion of the mounting member in the embodiment of the present invention showing a mesh structure;

[0026] Figure 10 Schematic diagram of the unfolded structure of the covering film sutured to the axial ends of the tubular body in an embodiment of the present invention;

[0027] Figure 11 This is a structural diagram of a connecting ring provided on a mounting member in an embodiment of the present invention;

[0028] Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at D in FIG.

[0029] Figure 13 This is a structural schematic diagram of a developing ring provided on a mounting member in an embodiment of the present invention;

[0030] Figure 14 Schematic diagram of the structure of the tubular body in an embodiment of the present invention;

[0031] Figure 15 Schematic diagram of the connection structure between the first connecting section and the second connecting section in an embodiment of the present invention;

[0032] Figure 16 This is a schematic structural diagram of the second connecting section in an embodiment of the present invention;

[0033] Figure 17 Schematic diagram of the connection structure of the first flexible connecting line and the second flexible connecting line in an embodiment of the present invention;

[0034] Figure 18 is a schematic diagram of the connection structure of the third flexible connecting line in an embodiment of the present invention;

[0035] Figure 19 This is a schematic structural diagram of a first connecting segment in an embodiment of the present invention presenting a mesh structure;

[0036] Figure 20This is a schematic structural diagram of a grid-like structure of the first connecting section in an embodiment of the present invention;

[0037] Figure 21 4 is a flowchart of a method for manufacturing a bracket according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Example 1

[0041] An embodiment of the present invention provides a bracket, such as Figures 3 to 8 As shown, it includes a tubular body 1 and a coating 2, the coating 2 is arranged on the tubular body 1, and the tubular body 1 includes a mounting part 11 and multiple circles of wavy rings 12; the multiple circles of wavy rings 12 are arranged at intervals along the axial direction, and two adjacent circles of wavy rings 12 are connected by the mounting part 11, and the coating 2 is connected to the mounting part 11 and / or the wavy ring 12.

[0042] It should be noted that after being implanted in a diseased area of ​​the human body, tubular body 1 is designed to expand and provide radial support for membrane 2. Membrane 2, made of polyester coating material, is located on the inside and / or outside of tubular body 1 and cooperates with tubular body 1 to form a blood flow channel, modifying blood flow in diseased vessels to promote vascular recovery.

[0043] The tubular body 1 includes a mounting member 11 and a multi-turn corrugated ring 12. The corrugated ring 12 can be made of metal or polymer materials, either of which can be biodegradable or non-biodegradable. The corrugated ring 12 comprises multiple crests, troughs, and rods, which are connected end-to-end to form a corrugated ring structure.

[0044] The mounting member 11 is used to connect two axially adjacent corrugated rings 12. The mounting member 11 is made of a flexible material, which can be at least one of nickel-titanium wire, stainless steel wire, tantalum wire, polytetrafluoroethylene (PTFE) wire, polyester (PET) wire, or polyamide (PA) wire. Thus, after the mounting member 11 connects the two adjacent corrugated rings 12, it can deform accordingly to accommodate the movement of the corrugated rings 12, thereby avoiding interference with the movement of the two adjacent corrugated rings 12.

[0045] In this embodiment, if Figure 3 As shown, the mounting member 11 is a connecting line, and the two ends of the mounting member 11 are respectively connected to the two adjacent circles of the corrugated ring 12, and the mounting member 11 is arranged along the axial direction of the corrugated ring 12. The mounting member 11 can be wound around or bonded to the corrugated ring 12. Specifically, as Figure 4 、 Figure 5 As shown, a connecting hole 123 is opened on the corrugated ring 12 , and the mounting member 11 is passed through the connecting hole 123 to connect two adjacent circles of the corrugated ring 12 .

[0046] In other embodiments, Figure 6 、 Figure 7 As shown, the corrugated ring 12 is provided with a winding groove, and the mounting member 11 is wound in the winding groove to connect two adjacent turns of the corrugated ring 12. In this way, the tubular body 1 can be manufactured by simply connecting the two ends of the mounting member 11 to the corrugated ring 12, simplifying the manufacturing steps of the tubular body 1 and improving the manufacturing efficiency of the tubular body 1.

[0047] like Figure 8 As shown, the coating 2 can be made of at least one of polyester (PET) or polyamide (PA), and is connected to the mounting member 11 and / or the corrugated ring 12. The coating 2 can be sewn or bonded to the mounting member 11 and / or the corrugated ring 12. The coating 2 can be located on the inside or outside of the tubular body 1.

[0048] In this embodiment, the membrane 2 is sutured to the sidewall of the tubular body 1, with two sutures 3 arranged axially along the tubular body 1, radially symmetrically disposed on the sidewall of the tubular body 1. Thus, the radially symmetrical arrangement of the sutures 3 on the sidewall of the tubular body 1 provides a tighter connection between the middle section of the membrane 2 and the tubular body 1, reducing the probability of expansion of the membrane 2 under radial pressure from blood flow, thereby preventing compression of the inner wall of the blood vessel by the membrane 2 and causing vessel deformation.

[0049] The advantage of such an arrangement is that, by setting the coating 2 on the tubular main body 1, the coating 2 can cooperate with the tubular main body 1 to form a blood flow channel, thereby reducing the flow resistance of blood flow, increasing the smoothness of blood flow, and realizing the treatment of vascular diseases; by setting multiple circles of wavy rings 12 at intervals along the axial direction, two adjacent circles of wavy rings 12 are connected by the mounting part 11, so that the mounting part 11 can limit the axial displacement of the two adjacent circles of wavy rings 12, thereby realizing the connection of the two adjacent circles of wavy rings 12. In this way, when it is necessary to cover the outer side or inner side of the wavy ring 12, the coating 2 does not need to provide a large number of suture points for connecting the two adjacent circles of wavy rings 12. For example, the coating 2 can be connected only to the axial ends of the tubular main body 1 to realize the coating of the tubular main body 1, thereby greatly reducing the needle and thread holes on the coating 2 and reducing the possibility of blood leakage from the coating 2.

[0050] Example 2

[0051] like Figure 9 As shown, the difference between this embodiment and the first embodiment is that the mounting member 11 is a mesh structure with gaps 114 formed therein, and the wave-shaped ring 12 is passed through the gaps 114 .

[0052] It should be noted that the mounting member 11 is formed by braiding metal wires, which are overlapped and woven to form a woven mesh. The overlapping portions of the metal wires have gaps 114. In this way, the corrugated ring 12 is passed through the gaps 114 of the mounting member 11 to complete the production of the tubular body 1, simplifying the production steps of the tubular body 1 and improving the production efficiency of the tubular body 1.

[0053] In this embodiment, if Figure 10 As shown, the membrane 2 is sewn to the axial ends of the tubular body 1, and the sutures 3 are arranged along the circumference of the tubular body 1. In this way, since the axial ends of the tubular body 1 are the blood inlet and blood outlet, respectively, sewing the membrane 2 to the axial ends of the tubular body 1 can avoid the need to sew in the middle section of the membrane 2, which would cause needle holes, thereby reducing the possibility of blood leakage from the membrane 2.

[0054] Since the number of suture points between the membrane 2 and the corrugated ring 12 is greatly reduced, it is difficult for the corrugated ring 12 to form a radial constraint on the membrane 2. Under the action of blood pressure, the membrane 2 is prone to radial expansion, causing radial expansion of the blood vessels. When the membrane 2 is located on the inner side of the corrugated ring 12, the mounting part 11 includes a mesh structure, so that the mesh structure can form a radial constraint on the membrane 2, avoiding radial expansion of the membrane 2 and causing radial expansion of the blood vessels, thereby reducing the probability of radial deformation of the membrane 2 under blood pressure and affecting blood vessel recovery; when the membrane 2 is located on the outside of the corrugated ring 12, the mesh structure can increase the resistance to the radial expansion of blood flow, thereby slowing down the expansion of the membrane 2 caused by blood flow pressure, and reducing the probability of radial deformation of the membrane 2 under blood pressure.

[0055] Furthermore, if Figure 11 、 Figure 12 As shown, to facilitate the connection between the mounting member 11 and the corrugated ring 12, the mounting member 11 is provided with a connecting ring 13, which is sleeved onto the corrugated ring 12. The connecting ring 13 is a metal ring or a braided linear material. Thus, the mounting member 11 can be mounted on the corrugated ring 12 via the connecting ring 13, thereby avoiding the need for knotting or stitching the corrugated ring 12. This simplifies the manufacturing steps of the tubular body 1 and improves the efficiency of the manufacturing process.

[0056] In other embodiments, Figure 13 As shown, the connecting ring 13 is a developing ring. The developing ring is made of a material that can be developed under X-rays, specifically platinum-iridium alloy, tantalum, or gold. The second connecting section 111 and the corrugated ring 12 can be threaded within the developing ring. Thus, by configuring the connecting ring 13 as a developing ring, the connecting ring 13 can function as a developing ring, eliminating the need to sew the developing element to the covering 2. This reduces the number of pinholes in the covering 2 and further reduces the possibility of blood leakage from the covering 2.

[0057] Example 3

[0058] like Figure 14 、 Figure 15 As shown, the difference between this embodiment and the second embodiment is that the mounting part 11 includes a first connecting section 112 and a second connecting section 111, the first connecting section 112 is connected to the wavy ring 12 and intersects to form the mesh structure, and the two ends of the second connecting section 111 are respectively connected to the two adjacent circles of the wavy ring 12 and / or the second connecting section 111.

[0059] It should be noted that the first connecting segment 112 and the second connecting segment 111 can be made of flexible wire or flexible thread, for example, at least one of nickel-titanium wire, stainless steel wire, tantalum wire, polytetrafluoroethylene (PTFE), polyester resin (PET), or polyamide fiber (PA). The first connecting segment 112 and the second connecting segment 111 can be braided, wrapped, or bonded to the corrugated ring 12.

[0060] In this embodiment, if Figure 14 As shown, the second connecting segment 111 is arranged along the axial direction of the corrugated ring. Its two ends are respectively connected to the two adjacent corrugated rings 12 or the first connecting segment 111. The second connecting segment 111 is made of a flexible material. Thus, when the two adjacent corrugated rings 12 move in the axial direction, the second connecting segment 111 can deform accordingly to accommodate the movement of the corrugated rings 12, thereby avoiding interference with the movement of the two adjacent corrugated rings 12.

[0061] like Figure 15 As shown, the second connecting section 111 is respectively connected to the first wave crest and the second wave trough or respectively connected to the first wave trough and the second wave crest.

[0062] In this embodiment, the mesh structure includes a first mesh structure unit and a second mesh structure unit that are axially adjacent. The second connecting segment 111 includes a first connecting line 1113 and a second connecting line 1114. One end of the first connecting line 1113 is connected to the trough of the first connecting segment 112 on the first mesh structure unit, and the other end of the first connecting line 1113 is connected to the crest of the wave-shaped ring 12 on the second mesh structure unit. One end of the second connecting line 1114 is connected to the trough of the wave-shaped ring 12 on the first mesh structure unit, and the other end of the second connecting line 1114 is connected to the crest of the first connecting segment 112 on the second mesh structure unit. As a result, the crests and troughs of the wave-shaped ring 12 and the first connecting segment 112 become the main stress points, increasing the integrity of the connection between the first connecting segment 112, the second connecting segment 111, and the wave-shaped ring 12, thereby increasing the stress stability of the tubular body 1.

[0063] like Figure 15As shown, two adjacent circles of the wavy ring 12 are respectively a first wavy ring 121 and a second wavy ring 122. The first wavy ring 121 includes a second crest and a second trough, and the second wavy ring 122 includes a third crest and a third trough. The second crest and the third crest are located on the same straight line, and the second trough and the third trough are located on the same straight line. The two ends of the second connecting segment 111 are respectively connected to the second crest and the third crest or to the second trough and the third trough. The second connecting segment 111 has multiple sections, all of which are arranged along the circumference of the wavy ring 12. Since the wave rod of the wavy ring 12 has a structure that is approximately triangular, when the first wavy ring 121 and the second wavy ring 122 are pulled, the wave crests and troughs are relatively stable while the wave rods are prone to deformation. The two ends of the second connecting section 111 are respectively connected to the second trough and the third wave crest, so that the wave crests or troughs of the wavy ring 12 become force points. Compared with the method of pulling the wave rods, the overall structure of the wavy ring 12 is more stable.

[0064] The advantage of this arrangement is that the two ends of the second connecting segment 111 are respectively connected to the two adjacent circles of corrugated rings 12 and / or the first connecting segment 112, thereby realizing the connection of the two adjacent circles of corrugated rings 12, and the first connecting segment 111 is connected and intersected with the corrugated ring 12, so that the first connecting segment 112 can intersect with the corrugated ring 12 to form a mesh structure. On the one hand, the integrity of the mounting part 11 and the corrugated ring 12 is increased, so that the coating 2, the mounting part 11 and the corrugated ring 12 can be coordinated to bear force, thereby increasing the overall anti-expansion performance of the stent; on the other hand, the first connecting segment 112 can provide a connection node for the second connecting segment 111, thereby increasing the stability of the first connecting segment 111.

[0065] like Figure 14 、 Figure 15 As shown, the mounting member 11 further includes at least one third connecting segment 113 , which is connected to one axial end of the corrugated ring 12 , and the first connecting segment 112 and the second connecting segment 111 are respectively connected to the third connecting segment 113 .

[0066] It should be noted that the third connecting segment 113 can be made of a flexible wire or line, for example, at least one of nickel-titanium wire, stainless steel wire, tantalum wire, polytetrafluoroethylene (PTFE), polyester resin (PET), or polyamide fiber (PA). The third connecting segment 113 can be braided, wrapped, or bonded to the corrugated ring 12. The third connecting segment 113 is arranged along the circumference of the corrugated ring, and the first connecting segment 111 and the second connecting segment 112 can be wrapped around the third connecting segment 113 to achieve connection with the corrugated ring 12.

[0067] In this embodiment, if Figure 15 As shown, the third connecting segment 113 includes a fourth connecting segment 1131 and a fifth connecting segment 1132. The fourth connecting segment 1131 is connected to the crest of the waveform ring 12, and the fifth connecting segment 1132 is connected to the trough of the waveform ring 12. Therefore, on the one hand, the fourth connecting segment 1131 and the fifth connecting segment 1132 can form a radial constraint on the waveform ring 12, thereby increasing the anti-expansion performance of the stent; on the other hand, the third connecting segment 113 can provide a connection node for the first connecting segment 112, so that the first connecting segment 112 and the second connecting segment 111 can be wrapped around the third connecting segment 113. During manufacturing, the way the first connecting segment 112 and the first connecting segment 111 are wrapped around the third connecting segment 113 is simpler in manufacturing process and more efficient than the way the first connecting segment 111 and the first connecting segment 112 are passed through the connection holes on the waveform ring 12. In other embodiments, there may be multiple third connecting segments 113 , and the multiple third connecting segments 113 are disposed around the side wall of the corrugated ring 12 .

[0068] The advantage of this arrangement is that the third connecting segment 113 is connected to one axial end of the waveform ring 12 so that the plane where the third connecting segment 113 is located can be parallel to the axial end face of the waveform ring 12. In this way, when the first connecting segment 112 needs to be wrapped around the third connecting segment 113, the two ends of the first connecting segment 112 can be parallel to the two ends of the waveform ring 12, so that when the first connecting segment 112 is subjected to force, the waveform ring 12 will not bend sideways due to unbalanced force at both ends.

[0069] In other embodiments, the first connecting segment 112 is respectively wrapped around the fourth connecting segment 1131 and the fifth connecting segment 1132 and intersects with the corrugated ring 12 to form a corrugated structure. Thus, the fourth connecting segment 1131 and the fifth connecting segment 1132 provide connection locations for the first connecting segment 112, thereby facilitating control of the number of peaks and troughs in the first connecting segment 112, thereby enabling the stent to have different corrugation densities at different locations along its axial length. For example, in a narrow vessel segment, the likelihood of stent lateral bending deformation caused by radial expansion is low, and accordingly, the corrugation density can be controlled to be low to increase the stent's compliance. In a spacious vessel segment (especially at the site of a vascular lesion), the likelihood of stent lateral bending deformation caused by radial expansion, leading to ostial displacement, is high. In this case, the corrugation density of the first connecting segment 112 can be increased at the corresponding location to increase the circumferential stiffness of the tubular body 1, preventing the tubular body 1 from expanding toward the spacious side of the vessel, causing vessel deformation and resulting in vascular recovery failure.

[0070] Furthermore, if Figure 16As shown, the first connecting segment 112 is connected to the corrugated ring 12 or the third connecting segment 113 and intersects to form a corrugated structure, that is, the first connecting segment 112 includes a first wave crest and a first wave trough, and the corrugated ring 12 includes a second wave crest and a second wave trough, the first wave crest and the second wave trough are arranged relative to each other, and the first wave trough and the second wave crest are arranged relative to each other, so that the first connecting segment 112 and the corrugated ring 12 present a symmetrical corrugated ring structure to form a network structure. When the blood pressure in the tubular body 1 increases, the blood pressure will cause the tubular body 1 to expand. By connecting the first connecting segment 112 and the corrugated ring 12 and intersecting to form a corrugated structure, the radial constraint of the tubular body 1 can be increased, thereby increasing the anti-expansion performance of the tubular body 1 and avoiding the expansion deformation of the tubular body 1 causing the expansion deformation of the blood vessel.

[0071] In other embodiments, Figure 17 As shown, the first connecting section 112 includes multiple first flexible connecting lines 1121 and second flexible connecting lines 1122, and the first flexible connecting lines 1121 and the second flexible connecting lines 1122 are both connected to the corrugated ring 12. The first flexible connecting lines 1121 are arranged along the axial direction of the corrugated ring 12, and the second flexible connecting lines 1122 are arranged along the circumferential direction of the corrugated ring. The first flexible connecting lines 1121 and the second flexible connecting lines 1122 intersect to form a grid structure. Therefore, on the one hand, when the tubular body 1 is subjected to radial pressure, the first flexible connecting lines 1121 and the second flexible connecting lines 1122 can restrain the radial expansion of the membrane 2 and the corrugated ring 12, thereby improving the anti-expansion performance of the stent; on the other hand, the grid-like structure can increase the contact area between the second connecting section 212 and the membrane 2, thereby increasing the friction between the second connecting section 212 and the membrane 2, and reducing the probability of axial displacement of the membrane 2.

[0072] Furthermore, if Figure 18 As shown, the first connecting section 112 also includes a third flexible connecting line 1123, which is connected to the corrugated ring 12 and intersects with it to form a corrugated structure. That is, the third flexible connecting line has a first crest and a first trough, and the corrugated ring 12 includes a second crest and a second trough. The two ends of the first flexible connecting line 1121 are respectively connected to the first crest and the second trough, or respectively connected to the first trough and the second crest. The second flexible connecting line 1122 is arranged along the circumference of the corrugated ring 12 and intersects with the first flexible connecting line 1121 and the second flexible connecting line 1123. In this way, by interweaving the first flexible connecting line 1121, the second flexible connecting line 1122, and the third flexible connecting line 1123 with the corrugated ring 12, the integrity of the first connecting section 112 and the corrugated ring 12 can be enhanced, so that the first connecting section 112 and the corrugated ring 12 can be subjected to force as a whole, thereby improving the anti-expansion performance of the tubular body 1.

[0073] In other embodiments, Figure 19 As shown, the second connecting section 111 includes multiple first linear objects 1111 and second linear objects 1112. The two ends of the first linear object 1111 are respectively connected to two adjacent circles of wavy rings 12, and the two ends of the second linear object 1112 are respectively connected to two adjacent circles of wavy rings 12. The first linear object 1111 and the second linear object 1112 intersect to form a network structure. Since there is a certain gap area between two adjacent circles of wavy rings 12, in this area, it is difficult for the wavy rings 12 to form a constraint on the membrane 2. Under the action of blood pressure, the membrane 2 is prone to radial expansion, making it difficult to repair the expansion and deformation of the blood vessel. The first thread 1111 and the second thread 1112 intersect to form a mesh structure. When the membrane 2 is located on the inner side of the wavy ring 12, the intersection of the first thread 1111 and the second thread 1112 can form a radial constraint on the membrane 2, avoiding radial expansion of the membrane 2 and causing radial expansion of the blood vessel, thereby reducing the probability of radial deformation of the membrane 2 under blood pressure and affecting the recovery of the blood vessel; when the membrane 2 is located on the outer side of the wavy ring 12, the first thread 1111 and the second thread 1112 intersect to form a mesh structure, so that the mesh structure can increase the resistance to the radial expansion of blood flow, thereby slowing down the expansion of the membrane 2 caused by blood flow pressure and reducing the probability of radial deformation of the membrane 2 under blood pressure.

[0074] Furthermore, if Figure 20 As shown, the two ends of the first thread 1111 are respectively connected to two adjacent circles of the wavy ring 12. The first thread 1111 is arranged along the axial direction of the wavy ring 12, and the second thread 1112 is located between the two adjacent circles of the wavy ring 12. The second thread 1112 is annular and connected to the first thread 1111 to form a grid structure. As a result, the number of connection nodes between the first thread 1111 and the second thread 1112 is increased, thereby increasing the friction between the first thread 1111 and the second thread 1112 and the coating 2, and reducing the probability of axial displacement of the coating 2.

[0075] In other embodiments, the coating 2 is located on the inner side of the tubular body 1 and at least partially extends from both axial ends of the tubular body 1 to the outer side of the tubular body 1. The coating 2 located on the outer side of the tubular body 1 is bent toward the center of the tubular body 1 to cover the outer side wall of the tubular body 1. This creates a double-layer coating structure, increasing the coverage of the coating 2 on the tubular body 1, thereby ensuring a tighter connection between the coating 2 and the tubular body 1 and reducing the probability of axial displacement of the coating 2. In other embodiments, the second connecting section 111 can be folded along the axial direction of the tubular body 1 and cover the outer side of the corrugated ring 12.

[0076] In other embodiments, the mounting member 11 is made of a hot-melt adhesive material and adhered to the corrugated ring 12. For example, the hot-melt adhesive material may be polytetrafluoroethylene (PTFE), polypropylene (PP), or polyethylene (PE). Specifically, after the mounting member 11 is processed into a predetermined shape, it is placed in a cylindrical mold, and the corrugated ring 12 is placed over the mold. The mold is then heated, causing the mounting member 11 to melt and adhere to the mounting member 11, thereby achieving connection between the mounting member 11 and the mold. This simplifies the manufacturing process and increases the efficiency of manufacturing the tubular body 1.

[0077] Example 4

[0078] This embodiment provides a method for manufacturing a stent, for manufacturing the stent as described above, such as Figure 21 As shown, including:

[0079] Step S1: providing an elongated mounting member 11.

[0080] Step S2 : Connect the corrugated ring 12 and the mounting member 11 to obtain the tubular body 1 .

[0081] Step S3: Suturing the covering membrane 2 to the tubular body 1 to obtain the stent.

[0082] In step S1, metal wires or linear objects are interlaced and overlapped on a braided workpiece to form a mesh structure to obtain a mount 11. The overlapped portions have gaps for the corrugated ring 12 to pass through. The braided workpiece is a cylindrical structure comprising multiple winding posts. The metal wires are wound around the different winding posts along the circumference of the braided workpiece to form a multi-turn corrugated structure. The crests and troughs of two adjacent corrugated structures interlace to form gaps 114 to obtain the mount 11.

[0083] Step S1 further includes performing a heat setting treatment on the mounting part 11 , wherein the temperature of the heat setting treatment is 400° C. to 600° C. Specifically, the temperature of the heat setting treatment can be 400° C., 500° C., 505° C., 515° C., 550° C. or 600° C.

[0084] Step S1 also includes forming a connecting ring 13 during the braiding process of the mounting member 11, and sleeved the connecting ring 13 onto the corrugated ring 12 to obtain the mounting member 11. Thus, the mounting member 11 is first braided with connecting wire, and the connecting ring 13 is simultaneously braided on the mounting member 11. Since the connecting ring 13 has a large area and is easily identifiable, it facilitates the positioning and passage of the corrugated ring 12 during its shuttle operation, thereby simplifying the process of manufacturing the tubular body 1 and improving the efficiency of stent production.

[0085] In step S2, the corrugated ring 12 includes a straight state and an annular state. The corrugated ring 12 in the straight state is shuttled through the gap 114 along the circumference of the mounting part 11, and the two ends of the corrugated ring 12 in the straight state are connected to form an annular state, and then the preparation of the tubular main body 1 is realized.

[0086] In other embodiments, the mounting member 11 is a connecting wire, and the corrugated ring 12 is connected to the mounting member 11 to form the tubular body. Different corrugated rings 12 are mounted on the fixing member at predetermined intervals. The connecting wire is wrapped around the corrugated ring 12 to form a whole with multiple turns of the corrugated ring 12 to obtain the tubular body 1. The shape formed by the connecting wire wrapped around the corrugated ring 12 can correspond to the contours of the first connecting segment 112, the second connecting segment 111, and the third connecting segment 113 to obtain the mounting member 11.

[0087] In step S3, the coating 2 is disposed on the outer or inner wall of the tubular body 1 along the circumference of the tubular body 1. The coating 2 is sutured to the tubular body 1 at both axial ends thereof using sutures to obtain a stent. In other embodiments, the coating 2 may also be sutured to the tubular body 1 along the axial direction thereof.

[0088] In this way, by weaving a mounting part 11 with metal wire, and then passing the corrugated ring 12 through the gap 114 to form a tubular main body 1, and then suturing the membrane 2 to the tubular main body 1, the arrangement can reduce the suturing points of the membrane 2 and the tubular main body 1. Compared with the method in the prior art where a large number of suturing points are required between the membrane 2 and the tubular main body 1, the suturing time of the membrane 2 and the tubular main body 1 can be reduced, thereby improving the manufacturing efficiency of the stent and having good economic benefits.

[0089] Example 5

[0090] This embodiment provides a method for manufacturing a stent, which is used to manufacture the stent described above, comprising the following steps:

[0091] Step S1 : providing a mold and at least one hot melt adhesive line, wherein a circumferential side wall of the mold is provided with an accommodating groove for accommodating the hot melt adhesive line.

[0092] In step S2 , the hot melt adhesive line is placed in the receiving groove to form the mounting part 11 , the corrugated ring 12 is fixed to the outer wall of the mold, and the mold is heated to make the mounting part 11 adhere to the corrugated ring 12 to obtain the tubular body 1 .

[0093] Step S3: Suturing the covering membrane 2 to the tubular body 1 to obtain the stent.

[0094] In S1, the mold has a cylindrical structure, and a receiving groove is provided on the circumferential side wall of the mold. The shape of the receiving groove corresponds to the contours of the first connecting section 112, the second connecting section 111 and the third connecting section 113. In other embodiments, the receiving groove can also have a mesh structure.

[0095] In S2, a hot melt adhesive line is filled into the receiving groove along the contour of the receiving groove. A fixing column is provided on the outer wall of the mold, and the corrugated ring 12 is hung on the fixing column to fix the corrugated ring 12 on the mold. The mold is heated to melt and bond the mounting part 11 to the corrugated ring 12, and the tubular body 1 is demolded to obtain the tubular body 1. The heating temperature of the mold is 300°C to 500°C. Specifically, the heating temperature of the mold can be 300°C, 350°C, 400°C, 420°C and 500°C.

[0096] In S3, the coating 2 is disposed on the outer or inner wall of the tubular body 1 along the circumference of the tubular body, and the coating 2 is sutured to the tubular body 1 at both axial ends of the tubular body 1 using sutures to obtain a stent. In other embodiments, the coating 2 can also be sutured to the tubular body 1 along the axial direction of the tubular body 1.

[0097] In this way, the hot melt adhesive line is wound on the mold, and the mold is heated to make the hot melt adhesive line adhere to form the mounting part 11 and adhere to the corrugated ring 12 to realize the production of the tubular body 1, thereby simplifying the process flow of producing the tubular body 1 and improving the production efficiency of the bracket.

[0098] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A bracket, characterized in that: The invention comprises a tubular body and a covering film, wherein the covering film is arranged on the tubular body, and the tubular body comprises a mounting part and a plurality of corrugated rings; the mounting part is made of a flexible material; the plurality of corrugated rings are arranged at intervals along the axial direction, and two adjacent corrugated rings are connected by the mounting part, and the covering film is connected to the mounting part and / or the corrugated ring; the mounting part comprises a first connecting section, a second connecting section and a third connecting section, the first connecting section comprises a first wave crest and a first wave trough, the corrugated ring comprises a second wave crest and a second wave trough, the first wave crest and the second wave trough are arranged opposite to each other, the first wave trough and the second wave crest are arranged opposite to each other, the first connecting section and the corrugated ring are connected to each other The first connecting segment is connected and intersected with the waveform annular object, so that the first connecting segment intersects with the waveform annular object to form a network structure, the second connecting segment is arranged along the axial direction of the waveform annular object, the second connecting segment is respectively connected to the first wave crest and the second wave trough or respectively connected to the first wave trough and the second wave crest, the third connecting segment is connected to one axial end of the waveform annular object, the second connecting segment is respectively connected to the third connecting segment, the third connecting segment includes a fourth connecting segment and a fifth connecting segment arranged along the circumferential direction of the waveform annular object and respectively located at the axial ends of the waveform annular object, the fourth connecting segment is connected to the first wave crest and the second wave crest, and the fifth connecting segment is connected to the first wave trough and the second wave trough.

2. The bracket according to claim 1, wherein: The mesh structure includes a connecting ring, and the connecting ring is sleeved on the wave-shaped ring.

3. The bracket according to claim 2, characterized in that The connecting ring is a developing ring.

4. The bracket according to claim 1, wherein: The wave-shaped ring is provided with a connection hole and / or a winding groove, and the mounting member is at least partially inserted into the connection hole and / or the mounting member is wound around the winding groove.

5. A method for manufacturing a stent, for manufacturing the stent according to any one of claims 1 to 4, characterized in that: The following steps are involved: Provide a slender mounting piece; Connecting the corrugated ring to the mounting member to obtain a tubular body; The stent is obtained by suturing the covering membrane to the tubular body.

6. The method for manufacturing a stent according to claim 5, wherein: Provided is a slim mount comprising: At least one connecting wire is provided, and the connecting wire is woven into a mesh structure to obtain the mounting component.

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