Stent graft and delivery device

Abstract

The present invention belongs to the technical field of interventional medical devices, and specifically relates to a coated stent and a conveyor. The coated stent of the present invention includes a first stent, a first coating and a hanging unit, the first coating is provided on the first stent, the hanging unit is located inside the first stent provided with the first coating, and the hanging unit can be hung on the conveyor for conveying the coated stent. The coated stent of the present invention can achieve that when the coated stent is disconnected from the conveyor after completing the conveying process, the hanging unit will not cause damage to the blood vessel wall due to the outward force generated by the release of the coated stent, thereby ensuring the safety and reliability of the surgical process and preventing unnecessary damage to the patient.

Description

Technical Field

[0001] The present invention belongs to the technical field of interventional medical devices, and in particular relates to a stent graft and a conveyor. Background Art

[0002] Aneurysm is a common vascular disease in clinical practice, which mostly occurs in the elderly. This disease can easily lead to aortic aneurysm rupture, posing a great threat to the patient's life.

[0003] With the continuous development of modern medical technology, minimally invasive surgery to implant covered stents in the body has been widely used in the treatment of aortic aneurysms and dissecting aneurysms due to its minimal trauma and rapid recovery. This treatment method compresses the covered stent into a delivery device and guides it into the body along a pre-implanted guidewire track. Once it reaches the lesion, the covered stent is released to isolate the lesion and reestablish blood flow. After the aneurysm and dissection lose blood supply, the remaining blood in the aneurysm cavity gradually thrombus and muscularize into vascular tissue. The expanded aneurysm wall contracts due to pressure, gradually returning to a near-original state, thus achieving the purpose of treating the aneurysm and dissection.

[0004] Current stent graft systems for thoracic aortic aneurysms and dissecting aneurysms consist of a delivery device and a stent graft. The delivery device typically consists of a sheath core, a sheath tubing, and a handle. The stent graft consists of a metal framework and a membrane, and is pre-installed within the delivery device's sheath. To ensure precise positioning of the stent graft, the sheath core is typically used to secure the front end of the stent graft. The sheath core is then released after the stent graft is completely released from the sheath tubing. To secure the front end of the stent graft to the delivery device, a bare metal framework is typically installed at the front end of the stent graft, to which the delivery device is secured. However, this presents a problem. Because the metal framework at the front end of the stent graft is the last to be released, it generates a significant outward expansion force at the moment of release. This outward expansion force acts on the vessel wall, causing damage and, in severe cases, new ruptures, leading to surgical failure. Summary of the Invention

[0005] The present invention aims to at least address the problem of stent grafts causing damage to the blood vessel wall during their deployment. This aim is achieved by:

[0006] A first aspect of the present invention provides a stent graft, comprising:

[0007] First bracket;

[0008] a first covering film, the first covering film being provided on the first bracket;

[0009] A hanging unit is located inside the first stent provided with the first coating, and the hanging unit can be hung on a conveyor for conveying the coated stent.

[0010] According to the coated stent of the present invention, a hanging unit is provided inside the first stent provided with the first coating. During the transportation process of the coated stent, the connecting end of the conveyor is passed through and hung on the hanging unit, thereby realizing the transportation process of the coated stent. Since the connection position between the coated stent and the conveyor is inside the first stent provided with the first coating, that is, the hanging unit is inside the first stent covered with the first coating and will not contact the blood vessel wall, when the coated stent completes the transportation process and the connection relationship with the conveyor is released, after the coated stent is completely released from the conveyor, the hanging unit will not cause damage to the blood vessel wall due to the outward force generated by the release of the coated stent, thereby ensuring the safety and reliability of the surgical process and preventing unnecessary damage to the patient.

[0011] In addition, the stent graft according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the coated bracket also includes a second bracket, which is arranged inside the first bracket, the second bracket is connected to the first bracket and / or the first coating, and the hanging unit is arranged on the second bracket or the second bracket is the hanging unit.

[0013] In some embodiments of the present invention, the first bracket includes at least one first wave ring, at least one wave crest and / or at least one wave trough of the first wave ring are not fixed to the first coating, and the wave crest and / or the wave trough form the hanging unit.

[0014] In some embodiments of the present invention, the first bracket includes at least one first wave ring, and the at least one first wave ring is provided with an annular structure, the annular structure is not fixed to the first covering, and the annular structure forms the hanging unit.

[0015] In some embodiments of the present invention, the stent graft further includes a second graft, the second graft is circumferentially disposed continuously or discontinuously inside the first stent, and the second graft forms the hanging unit.

[0016] In some embodiments of the present invention, the first end of the second covering is connected to the first bracket and / or the first covering via spaced connection points, with gaps between adjacent connection points, and the second covering is provided with a plurality of connection holes, the connection holes being in communication with the gaps; or

[0017] The first end of the second covering is not connected to the first bracket and the first covering, the second end of the second covering is connected to the first bracket and / or the first covering, and the second covering is provided with a plurality of the connecting holes.

[0018] In some embodiments of the present invention, the second covering includes at least two connection points spaced apart from each other, and the second covering is connected to the first stent and / or the first covering via the at least two connection points.

[0019] In some embodiments of the present invention, the first end of the second coating is connected to the first bracket and / or the first coating through first connection points set at intervals, and a first gap is provided between adjacent first connection points; the second end of the second coating is connected to the first bracket and / or the first coating through second connection points set at intervals, and a second gap is provided between adjacent second connection points, and the first gap and the second gap are interconnected.

[0020] In some embodiments of the present invention, a circumferentially continuous or discontinuous suture line is provided inside the first coating, and the suture line is formed with a plurality of suture holes arranged at intervals, and the suture holes form the hanging unit.

[0021] Another aspect of the present invention further provides a conveyor for conveying any of the above-mentioned stent grafts, the conveyor comprising:

[0022] An inner sheath core, wherein a connecting unit and a first clamping portion are provided on an outer peripheral wall of the inner sheath core, wherein the connecting unit comprises a bendable connecting member, one end of the connecting member is connected to the inner sheath core, and the other end of the connecting member is a free end;

[0023] An outer sheath core is sleeved on the outside of the inner sheath core, and a second clamping portion is provided on the outer peripheral wall of the outer sheath core. The second clamping portion and the first clamping portion clamp each other, and the connecting piece can be clamped between the second clamping portion and the first clamping portion and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components.

[0025] Figure 1 Schematic diagram of a partial structure of the stent graft according to embodiment 1;

[0026] Figure 2 for Figure 1Schematic diagram of the AA cross-sectional structure of the medium stent graft;

[0027] Figure 3 A schematic diagram of a partial structure of a stent graft according to a second embodiment;

[0028] Figure 4 for Figure 3 Schematic diagram of the BB cross-sectional structure of the medium-length covered stent;

[0029] Figure 5 Schematic diagram of a partial structure of the stent graft according to the third embodiment;

[0030] Figure 6 for Figure 5 Schematic diagram of the CC cross-sectional structure of the medium stent graft;

[0031] Figure 7 Schematic diagram of a partial structure of a stent graft according to a fourth embodiment;

[0032] Figure 8 for Figure 7 Schematic diagram of the DD cross-sectional structure of the medium-length covered stent;

[0033] Figure 9 This is a schematic diagram of a partial structure of a stent graft according to a fifth embodiment;

[0034] Figure 10 for Figure 9 Schematic diagram of the EE cross-sectional structure of the medium-graft stent;

[0035] Figure 11 Schematic diagram of a partial structure of a stent graft according to a sixth embodiment;

[0036] Figure 12 for Figure 11 Schematic diagram of the FF cross-sectional structure of the medium-length covered stent;

[0037] Figure 13 Schematic diagram of a partial structure of a stent graft according to a seventh embodiment;

[0038] Figure 14 for Figure 13 Schematic diagram of the GG cross-sectional structure of the medium covered stent;

[0039] Figure 15 Schematic diagram of a portion of the structure of the inner sheath core of the conveyor according to the eighth embodiment;

[0040] Figure 16 A schematic diagram of a portion of the outer sheath core of the conveyor according to the eighth embodiment;

[0041] Figure 17 Schematic diagram of a portion of the structure before the inner sheath core and the outer sheath core are fixed in embodiment eight;

[0042] Figure 18 Schematic diagram of a portion of the structure of the inner sheath core and the outer sheath core being fixed in embodiment eight;

[0043] Figure 19 This is a schematic diagram of the partial structure after the inner sheath core and the outer sheath core are separated in the eighth embodiment. DETAILED DESCRIPTION

[0044] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, 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.

[0045] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only 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 "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence 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 to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0046] 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 otherwise, 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.

[0047] For ease of description, spatially 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 figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0048] To more clearly describe the structure of this application, the terms "proximal" and "distal" are defined herein as commonly used in the field of interventional medicine. Specifically, "distal" refers to the end away from the operator during the surgical procedure, "proximal" refers to the end closer to the operator during the surgical procedure, "axial" refers to the length direction, and "radial" refers to the direction perpendicular to the "axial" direction.

[0049] Implementation Method 1

[0050] Combine Figure 1 and Figure 2 As shown, the stent graft 10 of this embodiment includes a first bracket 11, a first coating 12 and a hanging unit. The first bracket 11 includes at least one first wave ring 111, and the first coating 12 is provided on the first bracket 11, so that the stent graft 10 forms a hollow structure with both ends open. The hanging unit is provided inside the first bracket 11 provided with the first coating 12, so that the hanging unit is not exposed to the outside of the stent graft 10, and the hanging unit can be hung on the conveyor used to convey the stent graft 10. The hanging unit can have a variety of structural forms, as long as it can ensure reliable hanging with the conveyor.

[0051] According to the coated stent 10 of this embodiment, a hanging unit is provided inside the first stent 11 provided with the first coating 12. During the transportation process of the coated stent 10, the hanging unit is hung on the conveyor, thereby realizing the transportation process of the coated stent 10. Since the hanging unit is inside the first stent 11 provided with the first coating 12 and will not contact the blood vessel wall, that is, the connection position between the coated stent 10 and the conveyor is inside the first stent 11 provided with the first coating 12, when the coated stent 10 completes the transportation process and is disconnected from the conveyor, after the coated stent 10 is completely released from the conveyor, the hanging unit will not damage the blood vessel wall due to the outward force generated during the release process, thereby ensuring the safety and reliability of the surgical process and preventing unnecessary damage to the patient.

[0052] Specifically, the first coating 12 of this embodiment is made of a material with good biocompatibility, such as ePTFE, PTFE, PET or PE materials. The first wave ring 111 is arranged in a cylindrical shape, including a plurality of crests 112 and troughs (not shown in the figure), and the crests 112 and the troughs are connected by straight rods, so that the first wave ring 111 has good radial elasticity and axial elasticity. The number of the first wave rings 111 can be one or more, preferably two or more, and made of materials with good biocompatibility and good elasticity, such as nickel-titanium alloy and stainless steel. The first bracket 11 and the first coating 12 can be combined in a high-temperature pressurized manner or in a suture-fixed manner. If suture-fixed is adopted, sutures need to be used. Sutures are made of materials with good biocompatibility, such as PTFE, PET or PP materials. In this embodiment, the first wave ring 111 and the first coating 12 are sutured with sutures 113, such as Figure 2 shown.

[0053] For example Figure 2 As shown, in this embodiment, at least one peak 112 of the first wave ring 111 of the first bracket 11 is not fixed to the first coating 12. The peak 112 forms a hanging unit of the coating bracket 10 of this embodiment, and the connecting end of the conveyor for conveying the coating bracket 10 can pass through and be hung to the peak 112.

[0054] In other embodiments, at least one trough of the first wave coil 111 of the first stent 11 is not fixed to the first coating 12, and the trough forms a hanging unit of the coated stent 10. Alternatively, at least one crest and at least one trough of the first wave coil 111 are not fixed to the first coating 12, and the crest and trough form a hanging unit. Alternatively, any crest and / or trough of different first wave coils 111 is not fixed to the first coating 12, and the crest and / or trough form a hanging unit.

[0055] Implementation Method 2

[0056] Combine Figure 3 and Figure 4 As shown, the stent graft 10 in this embodiment also includes a first stent 11, a first coating 12 and a hanging unit. The first stent 11 includes at least one first wave ring 111, and the first coating 12 is provided on the first stent 11, so that the stent graft 10 forms a hollow structure with both ends open. The hanging unit is provided inside the first stent 11 coated with the first coating 12, so that the hanging unit is not exposed to the outside of the stent graft 10, and the hanging unit can be hung on the conveyor used to transport the stent graft 10. At least one first wave ring 111 of this embodiment is provided with an annular structure 14, and the annular structure 14 is not fixed to the first coating 12. The annular structure 14 forms a hanging unit, and the connecting end of the conveyor used to transport the stent graft 10 can pass through and be hung to the annular structure 14. The annular structure 14 can be made of a material with good biocompatibility, which can be the same as the material of the first wave ring 111 or different, such as 316L stainless steel, PTFE or PET.

[0057] Implementation Method 3

[0058] Combine Figure 5 and Figure 6 As shown, the stent graft 10 in this embodiment also includes a first stent 11, a first coating 12, and a hooking unit. The stent graft 10 also includes a second coating 15, which is circumferentially disposed continuously or discontinuously within the first stent 11. The second coating 15 has various configurations and forms a hooking unit. The second coating 15 is disposed within the first stent 11, and the connection end of a conveyor for conveying the stent graft 10 can pass through and be hooked to the second coating 15.

[0059] In this embodiment, the first end 152 of the second coating 15 is connected to the first coating 12 through spaced connection points 13, with gaps 130 between adjacent connection points 13. The second coating 15 is provided with a plurality of connection holes 151, which are interconnected with the gaps 130. The connection end of the conveyor for conveying the graft stent 10 can pass through the gaps 130 and be hooked to the connection holes 151. In addition, the second end 153 of the second coating 15 may be connected to the first coating 12 or not. In this embodiment, the connection points 13 are formed by sewing with one or more sutures. In other embodiments, the connection points 13 may also be formed by gluing.

[0060] In other examples of this embodiment, the first end 152 of the second coating 15 may not be connected to the first coating 12, and the second end 153 of the second coating 15 is connected to the first coating 12. A plurality of connecting holes 151 are provided on the second coating 15, so that the connecting end of the conveyor for conveying the coating bracket 10 can pass through the first end 152 of the second coating 15 and be hung to the connecting hole 151.

[0061] In other embodiments, the second covering 15 is connected to the first bracket 11 , or is connected to both the first bracket 11 and the second covering 15 .

[0062] Implementation Method 4

[0063] Combine Figure 7 and Figure 8 As shown, the stent graft 10 in this embodiment also includes a first stent 11, a first coating 12, a hooking unit, and a second coating 15. The first stent 11 includes at least one first wave ring 111, and the first coating 12 is provided on the first stent 11, so that the stent graft 10 forms a hollow structure with both ends open. The second coating 15 is provided continuously or discontinuously along the circumference inside the first stent 11, and the connection end of the conveyor for conveying the stent graft 10 can pass through and be hooked to the second coating 15.

[0064] The second coating 15 of this embodiment includes at least two connection points (not shown in the figure) set at intervals, and the second coating 15 is connected to the first bracket 11 and / or the first coating 12 through at least two connection points. The angle range between any two adjacent connection points in the circumferential direction is greater than or equal to 45° and less than or equal to 180°, so that a larger space is formed on the first coating 12 for the connection end of the conveyor to pass through, which is convenient for operation. In this embodiment, there must be one connection point on the second coating 15 within 1 / 2 of the circumference, and the number of connection points on the second coating 15 within 1 / 4 of the circumference does not exceed 2. There must be one connection point within 1 / 2 of the circumference to ensure that the second coating 15 can be fixed in the required position after being subjected to axial force. There are no more than 2 connection points in 1 / 4 of the circumference, so that there is enough space between two adjacent installation positions of the second coating 15 to ensure that the connection end of the conveyor passes through and is fixed.

[0065] Implementation Method Five

[0066] Combine Figure 9 and Figure 10As shown, the stent graft 10 in this embodiment also includes a first stent 11, a first coating 12, and a hooking unit, with a second coating 15 forming the hooking unit. The first stent 11 includes at least one first corrugated ring 111, and the first coating 12 is disposed on the first stent 11, thereby forming the stent graft 10 with an open end and a hollow structure. The second coating 15 is disposed within the first stent, and the connection end of the conveyor for conveying the stent graft 11 can pass through and be hooked to the second coating 15.

[0067] In this embodiment, the first end 152 of the second covering 15 is connected to the first covering 12 via spaced first connection points 132, with first gaps 133 defined between adjacent first connection points 132. The second end 153 of the second covering 15 is connected to the first covering 12 via spaced second connection points 134, with second gaps 135 defined between adjacent second connection points 134. The first gaps 133 and the second gaps 135 are interconnected. The connection end of a conveyor for conveying the stent graft 10 can sequentially pass through the first gaps 133 and the second gaps 135 to be hooked onto the second covering 15.

[0068] In this embodiment, the first gap 133 and the second gap 135 are on the same axis. In other embodiments, the first gap 133 and the second gap 135 may not be on the same axis.

[0069] Implementation Method 6

[0070] Combine Figure 11 and Figure 12 As shown, the stent graft 10 in this embodiment also includes a first bracket 11, a first coating 12 and a hanging unit. The first bracket 11 includes at least one first wave ring 111, and the first coating 10 is provided on the first bracket 11, so that the stent graft 10 forms a hollow structure with both ends open. Furthermore, the interior of the first coating 12 of this embodiment is provided with a circumferentially continuous or discontinuous suture line 18. When suturing, the suture line 18 is sutured for a distance and then left empty for a distance, and then sutured again, thereby forming a plurality of spaced suture holes 181 on the suture line 18. The suture holes 181 form a hanging unit, and the connecting end of the conveyor for conveying the stent graft 10 can pass through and be hung to the suture hole 181.

[0071] In other embodiments, the suture 18 itself does not participate in the suturing, and the suture 18 can be fixed inside the first covering 12 by other sutures or glue.

[0072] Implementation Method Seven

[0073] Combine Figure 13 and Figure 14As shown, the stent graft 10 in this embodiment also includes a first bracket 11, a first coating 12 and a hanging unit. The first bracket 11 includes at least one first wave ring 111, and the first coating 12 is provided on the first bracket 11, so that the stent graft 10 forms a hollow structure with both ends open. Furthermore, the stent graft 10 also includes a second bracket 16, which is provided inside the first bracket 11, and the second bracket 16 is connected to the first bracket 11 and / or the first coating 12, and the hanging unit is provided on the second bracket 16 or the second bracket 16 is a hanging unit.

[0074] like Figure 14 As shown, in this embodiment, the second bracket 16 includes at least one second corrugated ring 161, preferably two or more, and at least a portion of the surface of the second bracket 16 is covered with a third coating 17. The first end of the second bracket 16 is connected to the first coating 12 via the third coating 17, and the second end of the second bracket 16 is a free end, wherein the free end faces the interior of the stent graft 10, so that the second bracket 16 forms a hanging unit, which can be hung on a conveyor for conveying the stent graft 10. At this time, in addition to the connection between the first bracket 11 and the second bracket 16 at the first end, there is a gap between the first bracket 11 and the second bracket 16.

[0075] In this embodiment, the second bracket 16 only includes a second wave ring 161, and the third coating 17 covers the portion of the second wave ring 161 close to the first end. The second end of the second bracket 16 presents the second wave ring 161 structure, which is similar to a sawtooth structure.

[0076] In other examples of this embodiment, the second bracket 16 may also be structured without the third coating 17, and the second bracket may be directly connected to the first end, the second end, or the middle portion of the coated stent 10, wherein the second bracket 16 may be connected to the first bracket 11. It is understandable that the hanging unit in the above-mentioned embodiments 1 to 6 may be provided on the second bracket 16.

[0077] Implementation Method Eight

[0078] Combine Figures 15-19 As shown, the conveyor 20 of this embodiment is used to convey the coated stent 10 of any of the above embodiments. The conveyor 20 includes an inner sheath core 21 and an outer sheath core 22.

[0079] A connecting unit 213 and a first clamping portion are provided on the outer peripheral wall of the inner sheath core 21. The connecting unit 213 includes a bendable connecting piece 214. One end of the connecting piece 214 is connected to the inner sheath core 21, and the other end of the connecting piece 214 is a free end. The outer sheath core 22 is sleeved on the outside of the inner sheath core 21. A second clamping portion is provided on the outer peripheral wall of the outer sheath core 22. The second clamping portion and the first clamping portion clamp each other. The connecting piece 214 can be clamped between the second clamping portion and the first clamping portion and fixed.

[0080] In this embodiment, the inner sheath core 21 is open at both ends and hollow, the first holding portion is a protrusion 211, and a connecting unit 213 and the protrusion 211 are provided on the outer peripheral wall of the inner sheath core 21. The connecting unit 213 and the protrusion 211 can be respectively provided at different positions on the outer peripheral wall of the inner sheath core 21, and the connecting unit 213 can be provided on the protrusion 211. A through groove 212 is provided on the protrusion 211 and passes through the protrusion 211.

[0081] The second holding portion is a connector 221 , which is provided on the outer peripheral wall of the outer sheath core 22 . The connector 221 can be inserted into the through groove 212 along the axial direction and tightly fit with the protrusion 211 . The connecting piece 214 can be clamped between the protrusion 211 and the connector 221 and fixed.

[0082] It should be noted that the connecting piece 214 can be clamped between the protrusion 211 and the connector 221 and fixed. When the inner sheath core 21 or the outer sheath core 22 is pulled at the proximal end, the protrusion 211 and the connector 221 can be separated, and the connecting piece 214 can be released from between the protrusion 211 and the connector 221.

[0083] In this embodiment, the protrusion 211 is in the shape of a "7" and faces the distal end. The through groove 212 runs through the entire "7"-shaped protrusion 211. Specifically, the through groove 212 includes a first through groove 2121 and a second through groove 2122. The first part 2121 and the second part 2122 are interconnected. The plug-in component 221 is a hook structure that extends toward the distal end and then bends back toward the proximal end. The plug-in component 221 is located at the distal end of the inner sheath core 22. Specifically, the hook structure includes a first part 2211, a second part 2212, and a third part 2213 that are connected in sequence. The plug-in component 221 is inserted into the through groove 212 along the axial direction. The third part 2213 can cooperate with the first through groove 2121. The connector 214 can be clamped between the third part 2213 and the first through groove 2121 and fixed. In other embodiments, the plug-in component 221 can be located at any position on the outer peripheral wall of the inner sheath core 22. The shapes of the protrusion 211 and the plug-in connector 221 are not limited, as long as the plug-in connector 221 can be matched with the through slot 212 .

[0084] In other embodiments, the second clamping portion and the first clamping portion can be of any shape, and no through groove may be provided. The second clamping portion and the first clamping portion may not be provided with a plug-in structure. The second clamping portion and the first clamping portion can be abutted against each other on the outer surface. By applying appropriate force to the inner sheath core 21 and the outer sheath core 22 at the proximal end for control, the connecting part can be clamped between the second clamping portion and the first clamping portion, so that the second clamping portion and the first clamping portion are abutted against and fixed.

[0085] The bendable connector 214 is made of a material with good biocompatibility, which can be a metal material with good elasticity, such as nickel-titanium alloy and stainless steel, or a polymer material, such as PTFE, PET and PP.

[0086] In one embodiment, a limiting member 215 is provided at the free end of the connecting member 214 . The limiting member 215 is a spherical member to prevent scratches on other components during the transportation of the inner sheath core 21 .

[0087] During specific use, when the conveyor 20 of this embodiment is used to convey the coated stent 10 of any of the above-mentioned embodiments, the coated stent 10 is sleeved on the outside of the outer sheath core 22, the free end of the connector 214 is extended into the lumen of the coated stent 10, the free end of the connector 214 is passed through the hanging unit on the coated stent 10, and then extended from the lumen of the coated stent 10, the outer sheath core 22 is sleeved on the outside of the inner sheath core 22, the connector 221 is passed through the through groove 212 of the protrusion 211, and the connector 214 is clamped between the protrusion 211 and the connector 221 and fixed, and the relative movement of the inner sheath core 21 and the outer sheath core 22 is restricted.

[0088] First, the delivery device 20 is delivered to the lesion site, and the sheath is withdrawn (not shown) to complete the release of the stent graft 10. Then, the inner sheath core 21 is withdrawn, and the connector 214 is released from between the protrusion 211 and the connector 221. At the same time, the stent graft 10 and the outer sheath core 22 are released to release the stent graft 10. Finally, the sheath of the delivery device 20, the inner sheath core 21, and the outer sheath core 22 are withdrawn from the body, leaving the stent graft 10 in the patient's body to isolate the lesion.

[0089] When using the conveyor 20 of this embodiment to convey the coated stent 10 in embodiment seven, other methods can also be used to fix the coated stent 10 on the outer sheath core 22. Specifically, the coated stent 10 is sleeved on the outside of the outer sheath core 22, the connector 214 is extended into the lumen of the coated stent 10, the free end is wrapped around the outer circumference of the second stent 16 at least once, and then extended from the lumen of the coated stent 10, the second stent 16 is wrapped and fixed on the outer sheath core 22, and the connector 221 is passed through the through groove 212 of the protrusion 211, and the connector 214 is clamped between the protrusion 211 and the connector 221 and fixed, thereby fixing the coated stent 10 on the outer sheath core 22 and limiting the relative movement of the inner sheath core 21 and the outer sheath core 22. The release process is the same as above and will not be repeated here.

[0090] When part of the surface of the second bracket 16 is covered with the third coating 17 or is not covered with the third coating 17, and the second bracket 16 is exposed, the connecting piece 214 can be appropriately inserted into the exposed part of the second bracket 16 during the winding and bundling process, and wrapped with the bracket rod of the second bracket 16 to achieve further fixation.

[0091] It is understandable that the length of the connecting member 214 is set according to the situation, and the connecting member 214 can have a certain degree of elasticity.

[0092] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A stent graft, characterized in that: include: First bracket; a first covering film, the first covering film covering the outside of the first stent; A hanging unit is located inside the first stent provided with the first coating, and the hanging unit can be hung on a conveyor for conveying the coated stent.

2. The stent graft according to claim 1, wherein: The coated bracket also includes a second bracket, which is arranged inside the first bracket and connected to the first bracket and / or the first coating. The hanging unit is arranged on the second bracket or the second bracket is the hanging unit.

3. The stent graft according to claim 1, wherein: The first bracket includes at least one first wave ring, at least one wave crest and / or at least one wave trough of the first wave ring are not fixed to the first covering film, and the wave crest and / or the wave trough form the hanging unit.

4. The stent graft according to claim 1, wherein: The first bracket includes at least one first wave ring, and the at least one first wave ring is provided with an annular structure. The annular structure is not fixed to the first covering film, and the annular structure forms the hanging unit.

5. The stent graft according to claim 1, wherein: The stent graft further includes a second graft, which is continuously or discontinuously arranged inside the first stent along the circumferential direction, and the second graft forms the hanging unit.

6. The stent graft according to claim 5, characterized in that: The first end of the second covering is connected to the first bracket and / or the first covering via spaced connection points, with gaps between adjacent connection points, and the second covering is provided with a plurality of connection holes, the connection holes being in communication with the gaps; or The first end of the second covering is not connected to the first bracket and the first covering, the second end of the second covering is connected to the first bracket and / or the first covering, and the second covering is provided with a plurality of the connecting holes.

7. The stent graft according to claim 5, characterized in that: The second covering includes at least two connection points that are spaced apart from each other, and the second covering is connected to the first stent and / or the first covering via the at least two connection points.

8. The stent graft according to claim 5, wherein: The first end of the second coating is connected to the first bracket and / or the first coating through first connection points set at intervals, and there is a first gap between adjacent first connection points. The second end of the second coating is connected to the first bracket and / or the first coating through second connection points set at intervals, and there is a second gap between adjacent second connection points, and the first gap and the second gap are interconnected.

9. The stent graft according to claim 1, wherein: A suture line that is continuous or discontinuous along the circumferential direction is provided inside the first covering film. The suture line is formed with a plurality of suture holes that are spaced apart, and the suture holes form the hanging unit.

10. A conveyor for conveying the stent graft according to any one of claims 1 to 9, characterized in that: include: An inner sheath core, wherein a connecting unit and a first clamping portion are provided on an outer peripheral wall of the inner sheath core, wherein the connecting unit comprises a bendable connecting member, one end of the connecting member is connected to the inner sheath core, and the other end of the connecting member is a free end; An outer sheath core is sleeved on the outside of the inner sheath core, and a second clamping portion is provided on the outer peripheral wall of the outer sheath core. The second clamping portion and the first clamping portion clamp each other, and the connecting piece can be clamped between the second clamping portion and the first clamping portion and fixed.

Images