Implant delivery system and implant

Abstract

The present invention relates to an implant delivery system and an implant. The implant includes a stent, a first connector, and a fixing member. The first connector is arranged in the proximal end of the stent, and the first connector is provided with a connecting hole. The fixing member is passed through the first connector, thereby fixing the stent and the first connector. Furthermore, the fixing member is formed in the connecting hole to form a blocking portion that blocks the push system from moving toward the distal end of the stent. The above-mentioned implant delivery system and implant can prevent the push system from being too tightly connected to the implant, and thus can be easily released during the process of releasing the connection between the push system and the implant, thereby avoiding the occurrence of a stuck phenomenon.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an implant delivery system and an implant. Background Art

[0002] Atrial fibrillation (abbreviated as "AF") is the most common persistent heart rhythm in clinical practice. The older you are, the higher the chance of occurrence. When atrial fibrillation occurs, blood flow in the atria is not smooth, and a blood clot forms in the left atrial appendage. Patients with atrial fibrillation are prone to blood clots, and the probability of blood clots is 5-6 times that of ordinary people. Therefore, preventing atrial fibrillation is of great significance. At present, patients with non-valvular atrial fibrillation have a 90% chance of forming a blood clot in the left atrial appendage. Studies in recent years have shown that blocking the left atrial appendage can effectively prevent the risk of ischemic stroke caused by atrial fibrillation.

[0003] Existing occluders used for left atrial appendage occlusion surgery can be roughly divided into two categories: one is the plug-type occluder, exemplified by the Watchman device, and the other is the cap-type occluder, exemplified by the Lambre device. After the occluder is delivered to the designated location in the body, it is released, and the connection between the push system and the implant is released to complete the implant. However, the traditional connection between the push system and the implant is prone to being too tight, making it difficult to release or becoming stuck during the release process. Summary of the Invention

[0004] Based on this, it is necessary to provide an implant delivery system and an implant, which can achieve a reliable connection between the implant and the push system, and is easy to release during the process of releasing the connection between the push system and the implant, avoiding the phenomenon of being difficult to release or getting stuck.

[0005] In one aspect, the present application provides an implant comprising:

[0006] Bracket;

[0007] a first connecting member, the first connecting member being disposed at a proximal end of the stent, the first connecting member being provided with a connecting hole, the connecting hole being used for passing a pushing system;

[0008] A fixing member is provided on the first connecting member and passes through the connecting hole, and a blocking portion is formed in the connecting hole for blocking the pushing system from moving toward the distal end of the bracket.

[0009] The above-mentioned implant is achieved by arranging the first connecting member at the proximal end of the bracket, and passing the fixing member through the connecting hole, and forming a blocking portion in the connecting hole. The blocking portion is used to block the pushing system from moving toward the distal end of the bracket, thereby effectively preventing the pushing system from penetrating the connecting hole and fitting too deeply with the connecting hole, avoiding the pushing system and the implant from being too tightly connected, and then facilitating the release of the connection between the pushing system and the implant, thereby avoiding the phenomenon of being difficult to release or getting stuck.

[0010] The technical solution of this application is further described below:

[0011] In one embodiment, the bracket includes a proximal part, the proximal part is provided with a receiving cavity, and the first connecting member is disposed in the receiving cavity.

[0012] In one embodiment, the coating is at least partially disposed between the proximal member and the first connecting member, and the fixing member is further disposed on the coating.

[0013] In one embodiment, the stent includes a mesh connected to the proximal member, and the membrane covers the mesh and wraps the outer surface of the proximal member.

[0014] In one embodiment, the height of the proximal part is L1, the length of the membrane in the accommodating cavity along the axial direction of the accommodating cavity is L2, and the height of the first connecting part is L3, wherein L1>L2>L3.

[0015] In one embodiment, the distance between the fixing member and the proximal end of the first connecting member is L4, and the distance between the fixing member and the proximal end of the proximal member is L5, wherein L5>L4.

[0016] In one embodiment, both ends of the blocking portion are connected to a fixing portion, the first connecting member is provided with a mounting groove communicating with the connecting hole, and the fixing portion is at least partially fixed in the mounting groove.

[0017] In one embodiment, one end of the fixing portion is connected to the blocking portion, and the other end of the fixing portion is an extending end, and the extending end passes through the mounting slot or passes through the mounting slot and the proximal part.

[0018] In one embodiment, there are at least two blocking portions, and the at least two blocking portions are spaced apart in the connecting hole.

[0019] In one embodiment, all the fixing portions located on the same end side of at least two of the blocking portions are bent or folded toward opposite directions after passing through the mounting slot and the proximal end member.

[0020] In one embodiment, the extension end includes a first portion and a second portion, and the first portion and the second portion are bent or folded in a direction away from each other or in a direction toward each other after passing through the installation slot.

[0021] On the other hand, the present application also provides an implant delivery system, comprising:

[0022] Bracket;

[0023] A first connecting member, the first connecting member is arranged at a proximal end of the stent, and the first connecting member is provided with a connecting hole;

[0024] a fixing member, the fixing member being provided on the proximal end of the stent and the first connecting member and passing through the connecting hole, and forming a blocking portion in the connecting hole;

[0025] A pushing system is provided with a second connecting piece at the distal end of the pushing system, and the second connecting piece is detachably arranged in the connecting hole.

[0026] In one embodiment, the distal end of the second connecting member abuts against the blocking portion.

[0027] In one embodiment, the second connecting member is threadedly connected to the first connecting member.

[0028] In one embodiment, the stent includes a proximal part, the proximal part is provided with a accommodating cavity, the first connecting part is arranged in the accommodating cavity, the implant also includes a coating, the coating is at least partially arranged between the proximal part and the first connecting part, and the fixing part is also passed through the coating.

[0029] In one embodiment, both ends of the blocking portion are connected to a fixing portion, the first connecting member is provided with a mounting groove communicating with the connecting hole, and the fixing portion is at least partially fixed in the mounting groove.

[0030] The implant delivery system described above secures the stent to the first connector by inserting a fixing member through the proximal end of the stent. The distal end of the second connector is removably connected to the connection hole of the first connector, and the proximal end of the second connector is connected to the delivery system, thereby achieving connection between the delivery system and the stent. The implant is simple and reliable. Furthermore, the fixing member passes through the connection hole, forming a blocking portion within the connection hole. The blocking portion effectively prevents the second connector from fitting too deeply into the connection hole of the first connector, thereby preventing the second connector from being too tightly connected to the first connector. This facilitates release during the release process, preventing the second connector from becoming difficult to release or becoming stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is a cross-sectional view of the structure of an implant according to an embodiment;

[0034] Figure 2 for Figure 1 a cross-sectional view of the implant shown in ;

[0035] Figure 3 for Figure 2 A top view of the implant shown in ;

[0036] Figure 4 is a cross-sectional view of an implant according to another embodiment;

[0037] Figure 5 for Figure 4 A top view of the implant shown in ;

[0038] Figure 6 for Figure 4 A schematic structural diagram of a fixing member of an implant shown in ;

[0039] Figure 7 for Figure 4 A schematic structural diagram of the first connecting member of the implant shown in ;

[0040] Figure 8 for Figure 7 A schematic cross-sectional view of the first connecting member at section AA shown in FIG;

[0041] Figure 9 A top view of an implant according to another embodiment;

[0042] Figure 10 for Figure 9 A schematic structural diagram of a fixing member of an implant shown in ;

[0043] Figure 11 for Figure 10 A schematic structural diagram of a single rod of the fixing member shown in ;

[0044] Figure 12 for Figure 10 Schematic diagram of the coordination between the fixing parts and the kit shown in ;

[0045] Figure 13 for Figure 10 Schematic diagram of the fixing installation process shown in ;

[0046] Figure 14 for Figure 9 Schematic diagram of the structure of the first connecting member of the implant shown in.

[0047] Description of reference numerals:

[0048] 10. Bracket; 11. Grid; 12. Proximal part; 121. Accommodating cavity; 20. First connecting part; 21. Connecting hole; 22. Mounting slot; 23. Mounting hole; 30. Fixing part; 31. Blocking part; 32. Fixing part; Rod; 1. Main body; 2. Limiting part; 34. Kit; 40. Second connecting part; 50. Film. DETAILED DESCRIPTION

[0049] 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.

[0050] Specifically, one embodiment of the present application provides an implant delivery system. Specifically, the implant delivery system of one embodiment includes an implant and a pushing system, the pushing system is connected to the implant, and the pushing system is used to push the implant to a predetermined position in the human body.

[0051] Further, see Figures 1 to 3On the other hand, the present application also provides an implant. Specifically, the implant of one embodiment includes a stent 10, a first connector 20, and a fixing member 30, wherein the stent 10 includes a proximal member 12 located at the proximal end of the stent 10 and a grid 11 connected to the proximal member 12. The grid 11 has a contracted state and an expanded state. In the contracted state, the stent 10 is conveniently transported to a designated position in the human body under the push of a push system. In the expanded state, the stent 10 is used to support the coating 50 and secure the implant in the atrial appendage to block the atrial appendage. The first connector 20 is provided at the proximal end of the stent 10. Preferably, the proximal member 12 is provided with a receiving cavity 121. The first connector 20 is provided in the receiving cavity 121. The first connector 20 is provided with a connecting hole 21. The connecting hole 21 is used to pass the pushing system. Preferably, a second connector 40 is provided at the distal end of the pushing system. The second connector 40 is detachably provided in the connecting hole 21. Furthermore, the fixing member 30 passes through the connecting hole 21 and forms a blocking portion 31 within the connecting hole 21 for preventing the pushing system from moving toward the distal end of the stent 10. Preferably, the fixing member 30 is disposed through the proximal end of the stent 10 and the first connecting member 20, thereby securing the stent 10 to the first connecting member 20. The fixing member 30 extends transversely through the first connecting member 20 along an axis perpendicular to the first connecting member 20, and both ends of the fixing member 30 extend through the proximal member 12.

[0052] The implant delivery system and implant are configured such that the stent 10 is fixedly connected to the first connector 20 by inserting a fixing member 30 through the proximal member 12 of the stent 10 and the first connector 20. Furthermore, the second connector 40 at the distal end of the delivery system is removably connected to the connection hole 21 of the first connector 20, thereby achieving a connection between the delivery system and the implant. The connection structure is simple and reliable. Furthermore, the fixing member 30 penetrates the connection hole 21 and forms a blocking portion 31 within the connection hole 21. The blocking portion 31 effectively prevents the second connector 40 from fitting too deeply into the connection hole 21 of the first connector 20, thereby preventing the second connector 40 from being too tightly connected to the first connector 20. This facilitates release during the release process, preventing the second connector 40 from becoming difficult to release or becoming stuck.

[0053] Further, see Figure 1 , the distal end of the second connecting member 40 abuts against the blocking portion 31. Preferably, the first connecting member 20 and the second connecting member 40 are threadedly connected, and the fixing member 30 passes through the connecting hole 21, and the blocking portion 31 is formed in the connecting hole 21. The abutment of the distal end of the second connecting member 40 against the blocking portion 31 can prevent the threads of the first connecting member 20 and the second connecting member 40 from being too tight, thereby preventing the threads from being stuck or difficult to release due to excessive deformation during the process of releasing the threaded connection between the second connecting member 40 and the first connecting member 20.

[0054] Further, see Figure 2 as well as Figure 3 The implant also includes a coating 50, which is used to prevent the atrial appendage thrombus from falling off. The distal end of the coating 50 is connected to the grid 11. Preferably, the distal end of the coating 50 is connected to the grid 11 by bonding, suturing, or snapping. The coating 50 is at least partially arranged between the proximal part 12 and the first connector 20, and the fixing part 30 is also passed through the coating 50. By at least partially arranging the coating 50 between the proximal part 12 and the first connector 20, that is, the coating 50 has a portion extending into the accommodating cavity 121, a coating wall that fits the inner wall of the accommodating cavity can be formed, so that the first connector 20 can be tightly fixed in the accommodating cavity 121 of the proximal part 12, avoiding the first connector 20 from shaking in the accommodating cavity 121, thereby increasing the coaxiality of the second connector 40 and the first connector 20, and avoiding problems such as the second connector 40 being stuck when mating with the first connector 20.

[0055] Furthermore, the coating 50 covers the grid 11 and wraps the outer surface of the proximal member 12. By wrapping the outer surface of the proximal member 12 with the coating 50, the proximal member 12 is prevented from being exposed, thereby reducing the probability of thrombosis at the proximal end of the stent 10.

[0056] Further, see Figure 2 , the height of the proximal part 12 is L1, and the height of the proximal part 12 is the distance from the distal end of the proximal part 12 to the proximal end of the proximal part 12. The length of the coating 50 in the accommodating cavity is L2, the height of the first connecting part 20 is L3, and the height of the first connecting part 20 is the distance from the distal end of the first connecting part 20 to the proximal end of the first connecting part 20 is L3. Among them, L1>L2>L3. Specifically, the proximal end refers to the end close to the push system during the operation, and the distal end refers to the end away from the push system. By making L1>L2>L3, it can be ensured that the first connecting part 20 can be stably fixed in the accommodating cavity 121 of the proximal part 12, and it is not easy to shake, thereby improving the matching stability of the first connecting part 20 and the second connecting part 40. Preferably, the difference range of L1, L2 and L3 is between 0.001mm and 1mm.

[0057] Furthermore, the distance from the fixing member 30 to the proximal end of the first connector 20 is L4, and the distance from the fixing member 30 to the proximal end of the proximal member 12 is L5, wherein L5>L4. Since during the cooperation between the fixing member 30 and the coating 50, the coating 50 is easily acted upon by an external force to pull the first connector 20 proximally, and the first connector 20 is easily squeezed out of the accommodating cavity 121, thereby increasing the exposed area of ​​the first connector 20. By making L5>L4, the proximal end of the first connector 20 is hidden in the accommodating cavity, ensuring that the first connector 20 will not be pulled out of the accommodating cavity 121 within a certain distance when it is driven by the coating 50 to move proximally, thereby effectively avoiding exposure of the first connector 20 and further avoiding the formation of thrombus at the proximal end of the first connector 20. Preferably, the difference between L5 and L4 ranges from 0 mm to 0.5 mm.

[0058] Further, see Figure 3 The cross section of the fixing member 30 can be circular, square or other shapes. The radial dimension of the fixing member 30 is 0 mm to 2 mm.

[0059] Furthermore, both ends of the blocking portion 31 of the fixing member 30 are connected to fixing portions 32. The first connecting member 20 defines a mounting slot 22 that communicates with the connecting hole 21, and the fixing portion 32 is at least partially fixed within the mounting slot 22. Furthermore, one end of the fixing portion 32 is connected to the blocking portion 31, and the other end of the fixing portion 32 is an extension end. The extension end extends out of the mounting slot 22 or passes through the mounting slot 22 and the proximal member 12, thereby improving the connection stability between the fixing member 30, the first connecting member 20, and the bracket 10.

[0060] Specifically, see Figure 4 as well as Figure 5 In one embodiment, at least two blocking portions 31 are provided, and at least two blocking portions 31 are spaced apart in the connecting hole 21. Figures 4 to 8 As shown in , there are two fixing members 30. Two mounting grooves 22 symmetrical along the axis of the first connecting member are provided on the circumferential wall of the first connecting member 20. The mounting grooves 22 are communicated with the connecting hole 21. The two fixing members 30 are arranged in the mounting grooves 22 in a one-to-one correspondence. The two fixing members 30 form two spaced blocking portions 31 in the connecting hole 21. The two spaced blocking portions 31 can effectively prevent the second connecting member 40 from fitting too tightly with the first connecting member 20. Furthermore, a fixing portion is formed at both ends of each fixing member 30, that is, a fixing portion 32 is provided at each end of the blocking portion 31. A part of the fixing portion 32 is passed through the mounting groove 22 and connected to the blocking portion 31. The other end of the fixing portion 32 is an extended end. In this embodiment, among all the fixing portions 32, the fixing portions 32 located on the same end side of all the blocking portions 31 constitute a group. The extended ends of each fixing portion 32 in the same group pass through the mounting groove 22 and pass through the coating 50 and the proximal part 12 in turn, and then bend or fold in opposite directions. Specifically, see Figure 5As shown, the first portion 321 on the fixing portion 32 connected to one of the blocking portions 31 and the second portion 322 on the fixing portion 32 connected to the other blocking portion 31 are located on the same side relative to the first connector 20. The first portion 321 and the second portion 322 both pass through the mounting slot 22 and sequentially pass through the coating 50 and the proximal member 12 before being bent or folded in opposite directions. Preferably, the first portion 321 and the second portion 322 are connected to each other after being bent or folded, thereby making the first connector 20, the coating 50 and the stent 10 fit more tightly and prevent shaking, thereby improving the coaxiality of the fit and untwisting between the first connector 20 and the second connector 40. At the same time, the connection and fixing of the two adjacent blocking portions 31 by the two fixing portions 32 can also effectively resist deformation, thereby further improving the stability of the fit between the first connector 20, the coating 50 and the proximal member 12 of the stent 10. It is worth noting that the fixing portion 32 of the fixing member 30 can be bent in a predetermined manner, the fixing member 30 has a certain elasticity, and the thickness of the fixing member 30 is between 0 mm and 2 mm, so the bent fixing portion 32 can directly pass through the installation slot 22 through elastic deformation without the need for other auxiliary tools. Preferably, the first portion 321 and the second portion 322 can be fixed by bonding or welding to each other. Furthermore, in another embodiment, the extended end of the fixing portion 32 can also be connected to the proximal member 12 after passing through the proximal member 12. For example, the extended end of the fixing portion 32 can be bonded or welded to the outer surface of the proximal member 12 after passing through the proximal member 12, which can also serve the purpose of fixing the fixing member 30 and the proximal member 12.

[0061] See also Figures 9 to 14 In another embodiment, the fixing portion 32 includes a first portion 321 and a second portion 322. One end of the first portion 321 and one end of the second portion 322 are both connected to the blocking portion 31. The other ends of the first portion 321 and the other ends of the second portion 322 pass through the mounting slot 22 and the proximal end member 12 of the bracket 10 and then bend or curve in a direction away from each other. Figures 9 to 14As shown, specifically, the fixing member 30 includes two rods, and the middle position of the two rods is fixedly connected by bonding or welding. A mounting groove 22 is provided on the circumferential wall of the first connecting member 20, which passes through the first connecting member 20 and connects to the connecting hole 21. The two rods are both inserted into the mounting groove 22. The middle connecting position of the two rods forms a blocking portion 31, and the two ends of the two rods 1 form a fixing portion 32 respectively. One end of the fixing portion 32 is connected to the blocking portion 31, and the other end of the fixing portion 32 is an extended end, which includes a first portion 321 and a second portion 322. The first portion 321 and the second portion 322 pass through the installation groove 22 and pass through the coating 50 and the proximal end member 12 of the bracket 10 in turn, and then bend in a direction away from each other, thereby preventing the fixing member 30 from falling out of the installation groove 22 through the limiting effect of the fixing portions 32 at both ends. At the same time, the fixing member 30 increases the diameter of the fixing member 30 by connecting at least two rods together to form a blocking portion 31, thereby improving the strength of the fixing member 30, ensuring that the first connecting member 20, the coating 50 and the proximal end member 12 of the bracket 10 are firmly connected and will not shake, thereby improving the coaxiality of the cooperation and release of the first connecting member 20 and the second connecting member 40. Furthermore, the fixing portion 32 may abut or be connected to the outer surface of the proximal member 12 after passing through the proximal member 12 . For example, the fixing portion 32 may be welded or bonded to the proximal member 12 after passing through the proximal member 12 .

[0062] Specifically, see Figure 12 as well as Figure 13 The fixing member 30 can be obtained by first bending the ends of a single rod into a predetermined shape to form a first portion 321 and a second portion 322 of the fixing portion 32 at both ends of the rod, and then bonding or welding the middle portions of the two rods together to obtain the fixing member 30. When inserting the fixing member 30 into the installation groove 22, in order to avoid obstruction by the fixing portion 32. Figure 12 As shown, since the fixing member 30 has a certain elasticity, one end of the fixing member 30 can be first inserted into a sleeve 34 so that the fixing portion 32 at one end of the fixing member 30 becomes straight, and then this end of the fixing member 30 is connected to the sleeve 34 and passed through the installation groove 22 and out to the outside of the proximal member 12, and then the sleeve 34 is taken off so that the fixing portion 32 at one end of the fixing member 30 returns to the bent state under the action of its own elasticity. Finally, the fixing portion 32 and the proximal member 12 are fixed together by bonding or welding to strengthen the connection between the fixing member 30 and the proximal member 12.

[0063] 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.

[0064] The above-described embodiments merely illustrate several implementations of the present invention, and while their 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.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0069] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. An implant, characterized in that include: The bracket includes a proximal end member, and the proximal end member is provided with a receiving cavity; a first connecting member, the first connecting member being disposed in the accommodating cavity, the first connecting member being provided with a connecting hole, the connecting hole being used for passing a pushing system; A fixing member is provided on the proximal member and the first connecting member to fix the bracket and the first connecting member, and the fixing member forms a blocking portion in the connecting hole for blocking the pushing system from moving toward the distal end of the bracket.

2. The implant according to claim 1, wherein It also includes a covering film, which is at least partially arranged between the proximal part and the first connecting part, and the fixing part is also passed through the covering film.

3. The implant according to claim 2, characterized in that The stent includes a grid connected to the proximal part, and the coating covers the grid and wraps the outer surface of the proximal part.

4. The implant according to claim 2, characterized in that The height of the proximal part is L1, the length of the membrane in the accommodating cavity along the axial direction of the accommodating cavity is L2, and the height of the first connecting part is L3, wherein L1>L2>L3.

5. The implant according to claim 3, characterized in that The distance between the fixing member and the proximal end of the first connecting member is L4, and the distance between the fixing member and the proximal end of the proximal member is L5, wherein L5>L4.

6. The implant according to claim 1, wherein Both ends of the blocking portion are connected to a fixing portion, the first connecting member is provided with a mounting groove communicating with the connecting hole, and the fixing portion is at least partially fixed in the mounting groove.

7. The implant according to claim 6, characterized in that One end of the fixing portion is connected to the blocking portion, and the other end of the fixing portion is an extending end, which passes through the mounting slot or passes through the mounting slot and the proximal end member.

8. The implant according to claim 6, characterized in that At least two blocking parts are provided, and the at least two blocking parts are spaced apart in the connecting hole.

9. The implant according to claim 8, characterized in that All the fixing portions located on the same end side of at least two of the blocking portions are bent or folded toward opposite directions after passing through the mounting groove and the proximal end member.

10. The implant according to claim 7, characterized in that The extending end includes a first portion and a second portion. The first portion and the second portion are bent or folded in a direction away from each other or in a direction toward each other after respectively passing through the installation slot.

11. An implant delivery system, characterized in that: include: The bracket includes a proximal end member, and the proximal end member is provided with a receiving cavity; a first connecting member, the first connecting member being disposed in the accommodating cavity, the first connecting member being provided with a connecting hole, the connecting hole being used for passing a pushing system; a fixing member, the fixing member being passed through the proximal member and the first connecting member to fix the stent and the first connecting member, and the fixing member forming a blocking portion in the connecting hole for blocking the pushing system from moving toward the distal end of the stent; A pushing system is provided with a second connecting piece at the distal end of the pushing system, and the second connecting piece is detachably arranged in the connecting hole.

12. The implant delivery system according to claim 11, wherein: The distal end of the second connecting member abuts against the blocking portion.

13. The implant delivery system according to claim 11, wherein: The second connecting member is threadedly connected to the first connecting member.

14. The implant delivery system according to claim 11, wherein: The implant further includes a covering membrane, which is at least partially disposed between the proximal member and the first connecting member, and the fixing member is further disposed on the covering membrane.

15. The implant according to claim 11, wherein Both ends of the blocking portion are connected to a fixing portion, the first connecting member is provided with a mounting groove communicating with the connecting hole, and the fixing portion is at least partially fixed in the mounting groove.

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