Cardiac implants and implant systems

Abstract

The present invention relates to a cardiac implant and an implantation system including the cardiac implant. The cardiac implant is configured to be advanced along a guidewire having a distal end that is annular or substantially annular, and includes a main body, a first connecting portion, and a second connecting portion. The main body includes a straight structure and a curved structure, and the main body includes a first end and a second end that are axially opposite. The first connecting portion is connected to the first end of the main body. The second connecting portion is connected to the second end of the main body. During advancement, the main body is transformed from a straight structure to a curved structure, and various parts of the main body are capable of transmitting axial force and movement to avoid axial stacking. The second connecting portion and the first connecting portion can be connected and locked to each other, thereby forming a ring together with the main body in the curved structure. The cardiac implant of the present invention can be formed into a ring by simply pushing, and no stacking will occur during the pushing process, which effectively reduces the difficulty of forming a ring for the cardiac implant.

Description

Technical Field

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

[0002] Repositioning the papillary muscles within the ventricle during cardiac repair surgery can improve outcomes. Currently, a technique involves first placing a guidewire and roughly looping the papillary muscles within the ventricle. A looping device is then delivered along the guidewire to reposition the papillary muscles within the ventricle. However, during delivery of this looping device, an additional traction catheter is required to pull the distal end of the looping device to form a loop. Otherwise, the looping device can easily become entangled, making looping difficult. Summary of the Invention

[0003] In view of this, the present invention aims to provide a cardiac implant and an implant system that can solve the above problems or at least alleviate the above problems to a certain extent.

[0004] To this end, the present invention provides, on one hand, a cardiac implant configured to be advanced along a guidewire having an annular or substantially annular distal end, and comprising a main body, a first connecting portion, and a second connecting portion. The main body comprises a straight configuration and a curved configuration, and comprises a first end and a second end opposite in the axial direction, the first connecting portion being connected to the first end of the main body, and the second connecting portion being connected to the second end of the main body. During advancement, the main body transforms from the straight configuration to the curved configuration, and various parts of the main body are capable of transmitting axial force and movement to avoid axial stacking. The second connecting portion and the first connecting portion are connectable and lockable to each other, thereby forming a ring together with the main body in the curved configuration.

[0005] On the other hand, the present invention also provides an implant system, comprising the aforementioned cardiac implant and a delivery device for delivering the cardiac implant, wherein the delivery device comprises a delivery sheath, a receiving assembly, and a capture assembly movably disposed in the inner cavity of the delivery sheath for capturing a guide wire, wherein the receiving assembly is detachably connected to the first connecting portion of the cardiac implant.

[0006] Compared to existing technologies that require an additional traction catheter to pull at the distal end to achieve looping, the cardiac implant of the embodiments of the present invention, based on its sufficiently supportive main body, has various parts capable of transmitting axial force and movement. Looping can be achieved by directly advancing the cardiac implant at the proximal end, without the need for additional equipment to pull at the distal end of the cardiac implant. This simplifies operation and effectively reduces the difficulty of looping the cardiac implant. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A is a schematic diagram of a cardiac implant according to an embodiment of the present invention, wherein the main body portion is in a straight configuration and the first connecting portion is in a first configuration;

[0008] Figure 1B yes Figure 1A Another schematic diagram of a cardiac implant is shown, wherein the main body is in a bent configuration, and the first connecting portion is connected to the second connecting portion, and the main body, the first connecting portion, and the second connecting portion together form a ring;

[0009] Figure 1C A structural form of a covering membrane of a cardiac implant is shown;

[0010] Figure 2A yes Figure 1A A schematic diagram of the main body and the second connecting portion of the cardiac implant and the first covering film covering the same;

[0011] Figure 2B yes Figure 2A A schematic diagram of the main body and the second connecting portion, wherein the first covering film is not shown;

[0012] Figure 2C yes Figure 2B A preformed form of the main body portion and the second connecting portion;

[0013] Figure 2D yes Figure 2B Another preformed form of the main body portion and the second connecting portion shown;

[0014] Figure 2E yes Figure 2B A variation of the main body portion and the second connecting portion shown;

[0015] Figure 2F yes Figure 2B Another variation of the main body portion and the second connecting portion shown;

[0016] Figure 3A yes Figure 1A A schematic diagram of the connection between the first connecting portion and the main body of the cardiac implant is shown;

[0017] Figure 3B yes Figure 3A A schematic diagram showing a first connecting portion and a main body portion being bound together by sutures;

[0018] Figure 3C yes Figure 3A Another schematic diagram showing the first connecting portion and the main body being bound together by sutures;

[0019] Figure 3D yes Figure 3AAnother variation in which the first connecting portion and the main body portion are tied together by sutures;

[0020] Figure 3E yes Figure 3A A schematic diagram showing a direct connection between the first connecting portion and the main body portion;

[0021] Figure 4A yes Figure 1A A perspective schematic diagram of a first connecting portion of the cardiac implant;

[0022] Figure 4B yes Figure 4A A cross-sectional view of the first connecting portion is shown, which shows the first elastic piece in two radially inward and radially outward configurations;

[0023] Figure 4C yes Figure 1B A cross-sectional view of the locked connection between the first connecting portion and the second connecting portion of the cardiac implant;

[0024] Figure 4D yes Figure 4A A perspective schematic diagram showing a first connecting portion covered with a second covering film;

[0025] Figure 4E yes Figure 4D Another variation of the first connecting portion shown is coated with a second coating film;

[0026] Figure 4F yes Figure 4A Another variation of the first connecting portion shown;

[0027] Figure 4G yes Figure 4A Another variation of the first connecting portion shown;

[0028] Figure 4H yes Figure 4A Yet another variation of the first connecting portion shown;

[0029] Figure 5A is a schematic diagram of a conveying device according to an embodiment of the present invention;

[0030] Figure 5B yes Figure 5A A partial schematic diagram of the delivery sheath assembly and the receiving assembly of the delivery device shown;

[0031] Figure 5C yes Figure 5B Schematic diagram of the locking wire of the receiving assembly and the second elastic piece plugged in and matched;

[0032] Figure 5D yes Figure 5C Schematic diagram of the lock wire being unlocked from the second elastic piece;

[0033] Figure 5E yes Figure 5B A variation of the lock wire shown;

[0034] Figure 5F yes Figure 5E Schematic diagram of the lock wire and the second elastic piece;

[0035] Figure 5G yes Figure 5F Schematic diagram of the lock wire being unlocked from the second elastic piece;

[0036] Figure 5H yes Figure 5B A variation of the illustrated receiving assembly;

[0037] Figure 5I yes Figure 5A A schematic diagram of the capture assembly of the delivery device shown, wherein the capture is in an expanded state;

[0038] Figure 5J yes Figure 5I Another schematic diagram of the capture assembly shown, wherein the capture device is in a retracted state;

[0039] Figure 6A 1 is a partial schematic diagram of an implant system according to an embodiment of the present invention, wherein the locking wire of the receiving component is locked with the first elastic piece and the second elastic piece;

[0040] Figure 6B yes Figure 6A Another schematic diagram of the implant system shown, wherein the lock wire of the receiving component is unlocked from the first elastic piece and locked with the second elastic piece;

[0041] Figure 6C yes Figure 6A Another schematic diagram of the implant system shown, wherein the lock wire of the receiving component and the first and second elastic fragments are unlocked;

[0042] Figure 6D yes Figure 6A A variation of the implant system shown, wherein the locking wire of the receiving assembly is locked to both the first spring piece and the second spring piece;

[0043] Figure 6E yes Figure 6D Another schematic diagram of the implant system shown, wherein the lock wire of the receiving component and the first and second elastic fragments are unlocked;

[0044] Figure 6F yes Figure 6A A variation of the implant system shown, wherein the locking wire of the receiving assembly is locked to both the first spring piece and the second spring piece;

[0045] Figure 6G yes Figure 6FAnother schematic diagram of the implant system shown, wherein the lock wire of the receiving component and the first and second elastic fragments are unlocked;

[0046] Figures 7A-7D is a schematic diagram of an implantation process of a cardiac implant according to an embodiment of the present invention or an operation process of an implantation system according to an embodiment of the present invention;

[0047] Figure 8A is a schematic diagram of a cardiac implant according to an embodiment of the present invention applied to valve replacement surgery;

[0048] Figure 8B is a schematic diagram of a cardiac implant according to an embodiment of the present invention applied to chordal manipulation surgery; and

[0049] Figure 8C FIG. 4 is a schematic diagram of a cardiac implant according to an embodiment of the present invention being applied to papillary muscle tightening and regulation surgery. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the embodiments described below can be combined with each other as long as there is no contradiction or conflict, and the same or similar concepts or processes may not be repeated in some embodiments.

[0051] First of all, it should be noted that, in this article, "proximal end" refers to the end of the device or element close to the operator. "Distal end" refers to the end of the device or element away from the operator. "Axial" refers to the direction that coincides with or is parallel to the central axis of the device or element. When the device or element is in a straight configuration, "axial" coincides with or is parallel to the line connecting the proximal center and the distal center. "Radial" refers to the direction that is perpendicular or approximately perpendicular to the axial direction and along the radius or diameter of the device or element. "Circumferential" refers to the direction surrounding the axial direction. "Lateral" refers to the direction that is perpendicular or approximately perpendicular to the axial direction. For axisymmetric devices or elements, such as cylindrical devices or elements, "lateral" and "radial" may coincide.

[0052] It is worth noting that the above-mentioned terms indicating orientation or positional relationship are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0053] refer to Figure 1A and Figure 1BThe cardiac implant 1000 according to one embodiment of the present invention comprises a main body 1100, a first connecting portion 1200 and a second connecting portion 1300. The main body 1100 can be connected as follows: Figure 1A The straight configuration shown is transformed into the Figure 1B The first connecting portion 1200 is provided at the first end 1101 of the main body 1100, and the second connecting portion 1300 is provided at the second end 1102 of the main body 1100, and the first connecting portion 1200 and the second connecting portion 1300 can be connected and locked to each other. Figure 1A When the cardiac implant 1000 is advanced along a guide wire having an annular or substantially annular distal end, the main body 1100 is transformed from a straight configuration to a curved configuration, and various portions of the main body 1100 are able to transmit axial forces and movements without axial stacking, until the first connecting portion 1200 and the second connecting portion 1300 are connected and locked to each other, thereby forming a curved configuration. Figure 1B Ring shown.

[0054] Compared to existing technologies that require an additional pulling catheter to pull at the distal end of a loopable device to achieve looping, the cardiac implant 1000 of this embodiment is based on its sufficiently supportive main body 1100. Various parts of the main body 1100 can transmit axial force and movement, and the main body 1100 will not collapse due to advancement. That is, the physical length between the first end 1101 and the second end 1102 of the main body 1100 (in a straight configuration, "physical length" refers to the straight-line distance between the first end 1101 and the second end 1102 of the main body 1100; in a curved configuration, "physical length" refers to the arc length between the first end 1101 and the second end 1102 of the main body 1100) remains unchanged. Therefore, looping can be achieved directly and simply by advancing the cardiac implant 1000 at the proximal end until the first connection portion 1200 and the second connection portion 1300 are locked and connected to each other, without the need for additional instruments to pull the cardiac implant 1000 at the distal end. In comparison, the looping operation of the cardiac implant 1000 according to the embodiment of the present invention is relatively simple and convenient, and the difficulty of looping the cardiac implant 1000 is effectively reduced.

[0055] In addition, by comparison Figure 1A and Figure 1B It is not difficult to find that in this embodiment, the first connecting portion 1200 includes a first structure (such as Figure 1A ) and a second structure (as shown) extending axially from the first end 1101 of the main body 1100. Figure 1B(As shown) (It is worth noting that in the second configuration, since the main body 1100 is curved, the axis of the main body 1100 is also curved, rather than a straight line), which means that the first connecting portion 1200 of this embodiment can move relative to the first end 1101 of the main body 1100. This helps the cardiac implant 1000 to form a smoother shape at the first connecting portion 1200 and the first end 1101 of the main body 1100. More specifically, when the main body 1100 changes from a straight configuration to a curved configuration, the first connecting portion 1200 changes from a straight configuration to a curved configuration. Figure 1A The first configuration shown is transformed into the Figure 1B The second structure shown, wherein in the first structure, the axis of the first connecting portion 1200 is parallel or approximately parallel to the axis of the main body 1100 in the straight structure (approximately parallel can be interpreted as the acute angle between the two axes is not greater than 30°) and has a lateral spacing, and the first connecting portion 1200 flips or swings 180° or nearly 180° relative to the main body 1100; in the second structure, the axis of the first connecting portion 1200 coincides with or approximately coincides with (i.e., nearly coincides with) the axis of the main body 1100 in the curved structure.

[0056] Preferably, the cardiac implant 1000 of this embodiment further includes a covering 1400, which covers at least a portion of the main body 1100, the first connecting portion 1200, and the second connecting portion 1300. This covering 1400 can reduce surface friction of the cardiac implant 1000, minimizing damage to cardiac tissue, while also improving biocompatibility and promoting tissue endothelialization. Preferably, the covering 1400 is made of a material selected from expanded polytetrafluoroethylene (ePTFE), polyethylene terephthalate (PET), polyurethane (PU), and the like. The covering 1400 can be connected to at least a portion of the main body 1100, the first connecting portion 1200, and the second connecting portion 1300 by suturing, bonding, or crimping. In this embodiment, the covering 1400 includes a first covering 1410 covering the outer surfaces of the main body 1100 and the second connecting portion 1300, and a second covering 1420 covering the outer surface of the first connecting portion 1200. The first covering film 1410 and the second covering film 1420 are both in the shape of a tube with both ends open, so as to allow the guide wire to pass through the main body 1100, the first connecting part 1200 and the second connecting part 1300. It is understandable that in other embodiments, such as Figure 1CAs shown, the covering film 1400a can also be an integral part, which can be connected to the main body 1100, the first connecting part 1200 and the second connecting part 1300 by suturing, bonding or crimping; it is worth noting that the part of the integral covering film 1400a corresponding to covering the first connecting part 1200 is a tube 1450 with two ends open, and the part 1460 corresponding to covering the first end 1101 has an opening 1461, and the opening 1461 is not blocked by the tube 1450, so that the guide wire can enter through the opening 1461 and pass through the main body 1100 and the second connecting part 1300.

[0057] refer to Figure 2A and Figure 2B In this embodiment, the main body 1100 includes a strip structure 1110. The strip structure 1110 is flat and extends continuously in the axial direction. This strip structure 1110 not only provides flexibility for the main body 1100, allowing the main body 1100 to bend relatively smoothly along the distal end of the roughly annular guidewire, but can also be regarded as a ridge that continuously extends between the first end 1101 and the second end 1102 of the main body 1100. The ridge maintains its physical length unchanged during the process of the main body 1100 transforming from a straight structure to a curved structure, thereby providing support and being able to transmit axial force and movement without axial stacking, thereby effectively improving the pushing performance of the main body 1100.

[0058] The first end 1101 of the main body 1100 is provided with a first through hole 1103 for connecting with the first connecting portion 1200 (described in detail below). Figure 2A As shown, in addition to the first opening 1411 for passing the guide wire (the first channel 1104 for passing the guide wire is formed by the first covering film 1410, the main body 1100 and the second connecting part 1300 and is connected to the first opening 1411), the first covering film 1410 also has a second opening 1412 corresponding to the first through hole 1103, so that the first through hole 1103 is connected to the first connecting part 1200.

[0059] like Figure 2BAs shown, in this embodiment, the second connecting portion 1300 provided at the second end 1102 of the main body 1100 includes a first tubular structure 1310. The first tubular structure 1310 includes at least one locking portion 1311, which, as shown in the figure, includes a first locking portion 1311a and a second locking portion 1311b in this embodiment. A locking groove 1312 is formed between the first locking portion 1311a and the second locking portion 1311b, and between the second locking portion 1311b and the second end 1102 of the main body 1100, respectively, for cooperating with the first connecting portion 1200 (described in detail below). In order to improve the bendability of the first tubular structure 1310, preferably, a plurality of cutting grooves 1313 are further provided on the first tubular structure 1310. The cutting grooves 1313 are arranged at intervals along the axial direction, preferably evenly spaced. It is also preferred that the main body 1100 and the second connecting portion 1300 are integrally formed (although in other embodiments, the two can also be designed separately and connected to each other), for example, by cutting a circular tube. In addition, the main body 1100 and the second connecting portion 1300 can also be pre-formed so that the final ring has a desired shape, such as Figure 2C The circular shape shown or Figure 2D The figure-8-shaped shape shown is shown. The specific preforming process may include, but is not limited to, heat treatment, shaping, etc., which will not be described in detail here. It is also preferred that the main body 1100 and the second connecting portion 1300 are made of a hard metal or polymer material with certain support properties, such as one or more of nickel-titanium alloy, stainless steel, cobalt-chromium alloy, polytetrafluoroethylene, polyetheretherketone, polyethylene, and nylon.

[0060] It is understandable that in other embodiments, the main body 1100 is not limited to the above-mentioned strip structure 1110. Figure 2EAs shown, in addition to the strip structure 1110a, the main body 1100a also includes a second tubular structure 1120a connected between the strip structure 1110a and the second connecting portion 1300. The second tubular structure 1120a is roughly semi-tubular and includes two first linear ridges 1121a extending continuously in the axial direction and a plurality of cut grooves 1122a. The two first ridges 1121a are opposite and spaced apart from each other. The multiple cut grooves 1122a are evenly spaced along the axial direction. Each circumferential ring of cut grooves extends between two first ridges 1121a, and each circumferential ring of cut grooves includes only one cut groove 1122a. Due to the presence of the first ridges 1121a and the strip structure 1110a, the main body 1100a maintains its physical length during the transition from a straight configuration to a curved configuration, enabling the transmission of axial force and motion without axial stacking, thereby effectively improving the pushing performance of the main body 1100a. The presence of the plurality of cutting grooves 1122a ensures the flexibility of the second tubular structure 1120a. Furthermore, the second tubular structure 1120a improves the adaptability of the resulting ring, allowing it to better meet surgical requirements, such as providing a tighter fit with a prosthetic heart valve (this application scenario will be described in detail below).

[0061] Or, as Figure 2F As shown, the main body 1100b includes, in addition to the strip structure 1110a, a second tubular structure 1120b and a third tubular structure 1130b connected between the strip structure 1110a and the second connecting portion 1300. The second tubular structure 1120b can refer to the above Figure 2EThe third tubular structure 1130b is a complete tubular structure, including multiple second ridges 1131b (only one complete second ridge 1131b is visible in the figure) and multiple cutting grooves 1132b. The multiple cutting grooves 1132b are not only evenly spaced in the axial direction, but also evenly spaced in the circumferential direction. That is, each circle of cutting grooves in the circumferential direction includes multiple spaced cutting grooves 1132b. In particular, each adjacent circle of cutting grooves is staggered circumferentially, so that the second ridges 1131b are no longer straight, but have a zigzag shape that conforms to the staggered arrangement of the cutting grooves 1132b. However, each part of the second ridge 1131b still extends continuously in the axial direction. Due to the presence of the strip structure 1110a, the first ridge 1121a and the second ridge 1131b, the main body 1100b maintains its physical length unchanged during the transition from a straight structure to a curved structure, and can transmit axial force and movement without axial stacking, thereby effectively improving the pushing performance of the main body 1100b. Due to the presence of the multiple cutting grooves 1132b, the flexibility of the third tubular structure 1130b is ensured. In addition, the second tubular structure 1120b and the third tubular structure 1130b also improve the adaptability of the final ring, which can better meet surgical requirements, such as fitting more closely with the artificial heart valve.

[0062] refer to Figure 3A In this embodiment, the first end 1101 of the main body 1100 is bound and connected to the first connecting part 1200 by a flexible line 1500 (preferably a suture). Specifically, the first connecting part 1200 includes a barrel 1210. The barrel 1210 has a cavity 1211 that runs through it in the axial direction to form a second channel 1211 for the guide wire to pass through and for the second connecting part 1300 to enter and / or pass through. The barrel 1210 includes an axially opposite first end 1212 and a second end 1213, and a connecting position 1214 is provided on the barrel 1210 near the first end 1212, which is used to be movably connected to the first end 1101 of the main body 1100 via the flexible line 1500. Specifically, the connecting position 1214 includes a second through hole 1215 opened on the barrel wall of the barrel 1210 near the first end 1212 and a connecting wall 1216 located between the second through hole 1215 and the first end 1212. Optionally, the connection position 1214 further includes a recessed portion 1217 recessed from the first end 1212 toward the second through hole 1215. The presence of the recessed portion 1217 helps to provide an accommodating position for the first end 1101 of the main body 1100, so that the first end 1101 of the main body 1100 and the first connection portion 1200 can be more smoothly connected after the ring is formed. Figure 3BWhen assembling the main body 1100 and the first connecting part 1200, the flexible wire 1500 can be passed through the first through hole 1103 and the second through hole 1215 multiple times in a clockwise or counterclockwise direction to wrap the connecting wall 1216 and the hole wall of the first through hole 1103 multiple times, and finally tied into a knot, thereby connecting the main body 1100 and the first connecting part 1200. However, since the flexible wire is wound in a manner that is not a rigid connection, the first connecting part 1200 can be flipped or swung relative to the first connecting part 1200 to switch between the first structure and the second structure. The specific binding method of the flexible wire 1500 is not limited. For example, it can also be as follows Figure 3C As shown, the flexible wire 1500 first passes through the first through hole 1103 clockwise and wraps around the hole wall of the first through hole 1103, then passes through the second through hole 1215 counterclockwise and wraps around the connecting wall 1216, and is repeatedly wrapped multiple times before being tied into a knot.

[0063] It is understandable that in other embodiments, the main body 1100 and the first connecting portion 1200 may also be connected by binding in other ways. Figure 3D As shown, in this example, the first end 1101c of the main body 1100c includes two circumferentially adjacent first through holes 1103c. The connection portion 1214c of the cylindrical body 1210c of the first connecting portion 1200c includes two circumferentially adjacent second through holes 1215c and a connecting wall 1216c located between the first end 1212c of the cylindrical body 1210c and the two second through holes 1215c. One first through hole 1103c corresponds to one second through hole 1215c and is connected by a flexible wire 1500c. This circumferentially parallel connection effectively prevents the first connecting portion 1200c from circumferentially deflecting or twisting relative to the main body 1100c, making it easier for the second connecting portion 1300 to align with the cavity 1211c of the first connecting portion 1200c.

[0064] It is also understandable that in other embodiments, the main body 1100 and the first connecting portion 1200 are not limited to being movably connected by being bound by the flexible wire 1500. Instead, the main body 1100 and the first connecting portion 1200 may be movably connected via one or more other intermediate connecting elements, which will not be described in detail here. Furthermore, the main body 1100 and the first connecting portion 1200 may be directly movably connected without any intermediate connecting elements.

[0065] For example, Figure 3EAs shown, the first connecting portion 1200d also includes a connecting rod 1220 connected to the barrel 1210d. The connecting rod 1220 is configured to engage with the first through-hole 1103d of the main body 1100d, thereby movably connecting the first connecting portion 1200d and the main body 1100d. Specifically, the first through-hole 1103d of the main body 1100d is longer and narrower than the first through-hole 1103. The connecting rod 1220 is generally T-shaped and includes a sliding section 1221 extending protruding from the barrel 1210d and a stop section 1222 transversely connected to the sliding section 1221. The length of the stop section 1222 is greater than the maximum width of the first through-hole 1103d. During assembly, the limiting section 1222 is passed vertically (i.e., the length of the limiting section 1222 is parallel or approximately parallel to the length of the first through hole 1103d) through the first through hole 1103d, while the sliding section 1221 is inserted into the first through hole 1103d. The connecting rod 1220 is then rotated approximately 90 degrees so that the limiting section 1222 lies across the outside of the first through hole 1103d, thereby preventing the connecting rod 1220 from slipping out of the first through hole 1103d. At this point, the sliding section 1221 is slidably received in the first through hole 1103d, thereby achieving a movable connection between the first connecting portion 1200 and the main body 1100d.

[0066] refer to Figure 4A In this embodiment, the barrel 1210 is further provided with at least one connection hole 1218 for cooperating with the receiving assembly of the conveying device to connect the first connecting portion 1200 and the receiving assembly of the conveying device (described in detail below). As shown in the figure, in this embodiment, the barrel 1210 is provided with two connection holes 1218, and the two connection holes 1218 are diametrically opposed.

[0067] refer to Figures 4A to 4C In this embodiment, the first connecting part 1200 also includes a first elastic piece 1230 connected to the cylinder 1210 (the figure shows a first elastic piece 1230, and in other embodiments, multiple first elastic pieces 1230 can also be provided). The first elastic piece 1230 is circumferentially located between the two connecting holes 1218. The first elastic piece 1230 can automatically spring into the cavity 1211 of the cylinder 1210 by utilizing its own elasticity to cooperate with the second connecting part 1300. In order to ensure that the first connecting part 1200 has a certain elasticity and strength, the material of the first connecting part 1200 is preferably a metal material, such as stainless steel, nickel titanium alloy or cobalt chromium alloy. In actual operation, the second connecting part 1300 is as follows Figure 4CThe direction of the arrow shown enters the cavity 1211 of the cylinder 1210 from left to right until the first locking portion 1311a or the second locking portion 1311b (depending on the size requirement of the final ring) passes over the first spring piece 1230 in the axial direction. When the external force is removed, the first spring piece 1230 automatically bounces into the cavity 1211 of the cylinder 1210 to the corresponding locking groove 1312 by its own elasticity and engages with the first locking portion 1311a or the second locking portion 1311b (the first locking portion 1311a is shown in the figure), thereby connecting and locking the first connection part 1200 and the second connection part 1300 to prevent the first connection part 1200 and the second connection part 1300 from detaching.

[0068] Preferably, in order to improve the smoothness of the second connection part 1300 entering the cavity 1211 of the first connection part 1200, as shown in FIG. Figure 4A As shown, the barrel 1210 is provided with a third opening 1219 extending radially through its sidewall, and the third opening 1219 is in communication with the cavity 1211. The first elastic piece 1230 corresponds to the third opening 1219, one end of which is connected to the barrel 1210 and the other end is free. The first elastic piece 1230 is provided with a retaining hole 1231 for engaging with a receiving assembly (described in detail below) of a delivery device for delivering the cardiac implant 1000. Thus, when the second connecting portion 1300 enters the cavity 1211 of the first connecting portion 1200, an external force can be first used to make the first elastic piece 1230 expand radially outward through the third opening 1219, so as to allow the receiving assembly of the conveying device to cooperate with the limiting hole 1231 and prevent the first elastic piece 1230 from rebounding into the cavity 1211 of the first connecting portion 1200. Therefore, the second connecting portion 1300 is free from the obstruction of the first elastic piece 1230, and the second connecting portion 1300 can freely pass through the entire cavity 1211 until the first locking portion 1311a or the second locking portion 1311b axially passes over the first elastic piece 1230, and then releases the connection between the receiving assembly of the conveying device and the first elastic piece 1230, and the first elastic piece 1230 automatically rebounds into the cavity 1211 to the corresponding locking groove 1312 by its own elasticity and engages with the first locking portion 1311a or the second locking portion 1311b (as shown in FIG. Figure 4C shown).

[0069] like Figure 4D As shown, in this embodiment, in order to allow the first elastic piece 1230 to expand radially outward, the inner diameter of the second coating film 1420 is larger than the outer diameter of the cylinder 1210, thereby reserving a space 1421 between the second coating film 1420 and the cylinder 1210 to allow the first elastic piece 1230 to expand radially outward. Alternatively, as Figure 4EAs shown, in other embodiments, the second covering film 1420e may also be closely attached to the outer surface of the cylinder 1210, and a window 1422 is opened in the second covering film 1420 corresponding to the third opening 1219, which can also allow the first elastic piece 1230 to expand radially outward.

[0070] refer to Figure 4F In other embodiments, in order to facilitate the second connecting portion 1300 to enter the cylinder 1210f, the first connecting portion 1200f further includes an outward expansion section 1240 connected to the second end 1213f of the cylinder 1210f, for guiding the second connecting portion to enter the cylinder 1210f. Figure 4F As shown, the outwardly flared section 1240 is generally trumpet-shaped and includes a plurality of guide blades 1241 spaced circumferentially. Each guide blade 1241 extends axially away from the second end 1213f of the cylindrical body 1210f while gradually expanding radially outward. Preferably, a fixing hole 1242 is provided at the distal end of each guide blade 1241 for securing the second covering film (not shown) covering the first connecting portion 1200f, for example, by bonding, sewing, or other methods.

[0071] It is understandable that in other embodiments, the first connecting portion 1200 may also adopt other structures. Figure 4G As shown, the connection hole 1218g provided on the cylinder 1210g of the first connection portion 1200g is aligned with the limiting hole 1231g on the first elastic piece 1230g in the axial direction. Figure 4H As shown, in this example, the barrel 1210h of the first connecting portion 1200h is shorter than the aforementioned barrel 1210, and the first elastic piece 1230h is disposed at the second end 1213h of the barrel 1210h, eliminating the third opening 1219. Furthermore, the barrel 1210h of this example no longer has the connection hole 1218. Instead, the limiting hole 1231h on the first elastic piece 1230h serves as a connection hole for connecting to the receiving assembly of the conveying device. Furthermore, three of the first elastic pieces 1230h are disposed on the second end 1213h of the barrel 1210h in this example, evenly spaced along the circumference.

[0072] refer to Figure 5A One embodiment of the present invention provides a delivery device 2000 for delivering the cardiac implant 1000. The delivery device 2000 includes a delivery sheath assembly 2100, a receiving assembly 2200, and a capture assembly 2300 movably disposed within the delivery sheath assembly 2100.

[0073] refer to Figure 5A and Figure 5BThe delivery sheath assembly 2100 includes a delivery sheath 2110 and a first operating handle 2120 connected to the proximal end of the delivery sheath 2110. Preferably, a bulge 2111 is provided on the outer side of the wall of the delivery sheath 2110 near its distal end. The bulge 2111 is provided with a guide hole that runs axially through the bulge for passing a guide wire and being guided by the guide wire. The guide hole and the first channel 1104 formed by the main body 1100 and the second connecting portion 1300 can both be movably passed through by the guide wire.

[0074] The receiving assembly 2200 includes at least one second elastic piece 2210, at least one locking wire 2220, and a second operating handle 2230 connected to the at least one locking wire 2220. Figure 5B As shown, in this embodiment, the receiving assembly 2200 includes two second elastic pieces 2210, and the two second elastic pieces 2210 are fixedly connected to the distal end of the delivery sheath 2110. The second elastic piece 2210 is provided with a lock hole 2211. Figure 5C and Figure 5D As shown, in this embodiment, the receiving assembly 2200 includes three locking wires 2220, two of which are used to respectively cooperate with the locking holes 2211 on the two second elastic pieces 2210, and the other locking wire 2220 is used to cooperate with the limiting hole 1231 of the first elastic piece 1230 on the first connecting portion 1200 of the cardiac implant 1000 (described in detail below). Accordingly, three axial through-cavities 2112 are provided in the wall of the delivery sheath 2110, and a locking wire 2220 is movably provided in a corresponding axial through-cavity 2112. Figures 5B to 5D As shown, in this embodiment, each of the locking wires 2220 is constructed of a single wire and is used to be plugged into and matched with the corresponding limiting hole 1231 or lock hole 2211. The material of the locking wire 2220 can be a metal material or a non-metallic material, preferably stainless steel, nickel titanium, cobalt-chromium alloy, polyetheretherketone (PEEK), polyethylene (PE) and other materials. During assembly, the first spring piece 1230 or the second spring piece 2210 is radially expanded outward by an external force, and then the corresponding locking wire 2220 is inserted into the limiting hole 1231 or lock hole 2211 to maintain the radially expanded shape of the first spring piece 1230 or the second spring piece 2210 (such as Figure 5C By pulling the corresponding lock wire 2220 toward the proximal side, the lock wire 2220 can be released from the corresponding limiting hole 1231 or lock hole 2211, and the first elastic piece 1230 or the second elastic piece 2210 will automatically rebound radially inward (as shown). Figure 5D shown).

[0075] It is understandable that in other embodiments, the lock wire 2220 may also adopt other structures. Figures 5E-5GAs shown, the lock wire 2220a adopts a U-shaped double-wire structure, one lock wire 2220a is movably arranged in a corresponding axial through cavity 2112, and each lock wire 2220a is correspondingly penetrated by a corresponding limiting hole 1231 or lock hole 2211 (such as Figure 5F As shown), both ends of each locking wire 2220a extend to the proximal end and are connected to the second operating handle 2230. During operation, by operating the second operating handle 2230 to pull the two ends of the locking wire 2220a, the first elastic piece 1230 of the first connecting member 1200 or the second elastic piece 2210 can be pulled radially outward (as shown). Figure 5F By pulling one end of the corresponding locking wire 2220a toward the proximal side until the other end of the locking wire 2220a exits from the limiting hole 1231 or the locking hole 2211, the first elastic piece 1230 or the second elastic piece 2210 automatically rebounds radially inward (as shown). Figure 5G shown).

[0076] Alternatively, in other embodiments, the receiving assembly 2200b may further include a cutting tube 2240 (e.g., a cutting tube 2240) that is movably disposed within the inner cavity of the delivery sheath 2110. Figure 5H The cutting tube 2240 includes a plurality of cutting grooves 2241, each of which extends in the circumferential direction. The plurality of cutting grooves 2241 are spaced apart in the axial direction. Preferably, adjacent cutting grooves 2241 are circumferentially offset from one another to improve the axial bending performance of the cutting tube 2240. The cutting grooves 2241 can be made of a metal or a non-metallic material, preferably stainless steel, nickel titanium, PEEK, PE, polyimide (PI), segmented polyether amide (Pebax), polytetrafluoroethylene (PTFE), nylon, or the like. At least one locking wire 2220b is fixedly connected to the distal end of the cutting tube 2240, for example, by welding, bonding, melting, or crimping. Furthermore, since the cutting tube 2240 is disposed within the delivery sheath 2110 and the locking wire 2220b needs to be inserted into the locking hole 2211 from the outside of the second elastic piece 2210, an obliquely extending through-hole can be provided within the wall of the delivery sheath 2110 for passing the locking wire 2220b therethrough, thereby allowing the locking wire 2220b to extend from within the delivery sheath 2110 to the outside of the second elastic piece 2210. This embodiment is particularly suitable for situations where the delivery device needs to navigate a curved path (such as the aortic arch) during delivery. Since the cutting tube 2240 can adaptively extend its cutting groove 2241 when curved, compensating for the loss of locking wire length caused by the curve, the locking wire 2220b can be effectively prevented from withdrawing when encountering a curved path, thereby effectively eliminating the risk of the locking wire 2220b being prematurely unlocked during delivery.

[0077] refer to Figure 5A and Figures 5I-5JIn this embodiment, the capture assembly 2300 includes a capture catheter 2310, a third operating handle 2320 connected to the proximal end of the capture catheter 2310, a capture rod 2330 movably provided in the capture catheter 2310 and the third operating handle 2320, and a capture device 2340 and a fourth operating handle 2350 respectively connected to the distal end and proximal end of the capture rod 2330. The capture catheter 2310 can movably pass through the delivery sheath assembly 2100. In this embodiment, the capture device 2340 includes a plurality of capture rings 2341, the proximal end of each capture ring 2341 is retracted and connected to the distal end of the capture rod 2330 through a connector 2342. In practice, the operator can hold the third operating handle 2320 with one hand and push the fourth operating handle 2350 with the other hand to expose the capture device 2340 to the distal end of the capture catheter 2310, and each capture ring 2341 is self-expanding (such as Figure 5I Alternatively, the operator can hold the third operating handle 2320 with one hand and pull the fourth operating handle 2350 with the other hand to retract the capture device 2340 into the capture catheter 2310 (as shown); Figure 5J shown).

[0078] refer to Figures 6A-6C The implant system 3000 according to one embodiment of the present invention includes the cardiac implant 1000 and the delivery device 2000 for delivering the cardiac implant 1000. During assembly, the delivery device 2000 and the cardiac implant 1000 are connected by detachably connecting the receiving assembly 2200 of the delivery device 2000 to the first connecting portion 1200 of the cardiac implant 1000. Specifically, the second elastic piece 2210 of the receiving assembly 2200 is inserted into the connecting hole 1218 from the inner side of the corresponding connecting hole 1218 of the first connecting portion 1200, and the free end of the second elastic piece 2210 is located outside the connecting hole 1218, and then the corresponding locking wire 2220 is pushed distally from the outer side of the second elastic piece 2210 to be inserted into the locking hole 2211, thereby locking the connecting assembly 2200 and the first connecting portion 1200, and the first elastic piece 1230 is radially expanded outward to the outside of the third opening 1219, and then the corresponding locking wire 2220 is pushed distally from the inner side of the limiting hole 1231 to be inserted into the limiting hole 1231, thereby maintaining the radially expanded shape of the first elastic piece 1230 (as shown in FIG. Figure 6A), preventing the first elastic fragment 1230 from bouncing inwardly into the cavity 1211 of the first connecting portion 1200. It is noteworthy that in this embodiment of the present invention, the corresponding locking wire 2220 used to connect the delivery device 2000 and the cardiac implant 1000 and to maintain the radially outward expansion of the first elastic fragment 1230 are both located outside the wall of the cylindrical body 1210 of the first connecting portion 1200. This avoids occupying space within the cavity 1211, improves the passability within the cavity 1211, and allows the capture catheter 2310 and the second connecting portion 1300 to move smoothly within the cavity 1211 of the first connecting portion 1200.

[0079] After the cardiac implant 1000 is advanced so that the second connection portion 1300 enters the cavity 1211 of the first connection portion 1200, the corresponding locking wire 2220 can be pulled proximally to release the connection between the locking wire 2220 and the first elastic piece 1230. The first elastic piece 1230 then automatically springs inwardly into the cavity 1211 of the first connection portion 1200 to the corresponding locking groove 1312 and engages with the corresponding locking portion 1311, thus completing the locking connection between the first connection portion 1200 and the second connection portion 1300 (e.g., Figure 6B Next, the remaining two lock wires 2220 are pulled proximally to release the connection between the two lock wires 2220 and the two second elastic pieces 2210, and then the receiving assembly 2200 is withdrawn as a whole, that is, the connection between the receiving assembly 2200 and the first connecting portion 1200 is released (as shown). Figure 6C At this time, the free end of the second elastic piece 2210 automatically moves toward the axis of the delivery sheath tube 2110.

[0080] It is understandable that the implant system of the embodiment of the present invention may also include the cardiac implants of other embodiments and the corresponding delivery devices. Figures 6D-6E As shown, the implant system 3000g includes the use of Figure 4GThe cardiac implant 1000g and the corresponding delivery device 2000g are described. As previously described, since the connection hole 1218g of the first connection part 1200g is axially aligned with the limiting hole 1231g on the first elastic piece 1230g, the receiving assembly 2200g of the delivery device 2000g of this embodiment can only include one locking wire 2220 and one second elastic piece 2210. During assembly, the second elastic piece 2210 is inserted into the connecting hole 1218g from the inner side of the connecting hole 1218g, and the free end of the second elastic piece 2210 is located outside the connecting hole 1218g, and the first elastic piece 1230g is radially expanded outward to the outside of the third opening 1219g, and then the lock wire 2220 is pushed distally to be inserted into the lock hole 2211 from the outer side of the second elastic piece 2210, and inserted into the limiting hole 1231g from the inner side of the limiting hole 1231g, thereby achieving locking and connecting the receiving assembly 2200g and the first connecting part 1200g, while also maintaining the radially expanded shape of the first elastic piece 1230g (as shown in FIG. Figure 6D After the cardiac implant 1000g is advanced so that the second connecting portion 1300g enters the cavity 1211g of the first connecting portion 1200g, the locking wire 2220 can be pulled proximally to simultaneously release the connection between the locking wire 2220 and the first elastic piece 1230g and the second elastic piece 2210. At this time, the first elastic piece 1230g automatically springs inward into the cavity 1211g of the first connecting portion 1200g and engages with the corresponding locking portion, completing the locked connection between the first connecting portion 1200g and the second connecting portion 1300g, and also releasing the connection between the receiving assembly 2200g and the first connecting portion 1200g (as shown in FIG. 1 ). Figure 6E ), which simplifies the operation process.

[0081] Or, as Figures 6F-6G As shown, the implant system 3000h may also include the use of Figure 4H The cardiac implant 1000h and the delivery device 2000 of the first connecting portion 1200h described are described. As mentioned above, the first connecting portion 1200h is no longer designed with a connecting hole 1218, and the limiting hole 1231h on the first elastic piece 1230h is used as a connecting hole at the same time. Therefore, during assembly, it is only necessary to insert the second elastic piece 2210 into the limiting hole 1231h from the inner side of the corresponding first elastic piece 1230h, and make the free end of the second elastic piece 2210 be located outside the first elastic piece 1230h, and then push the locking wire 2220 to the distal side and insert it into the locking hole 2211 from the outer side of the second elastic piece 2210, so as to achieve the locking connection between the receiving assembly 2200 and the first connecting portion 1200h, while also maintaining the radially outward expansion shape of the first elastic piece 1230h (such as Figure 6FAfter the cardiac implant 1000h is advanced so that the second connecting portion 1300h enters the cavity 1211h of the first connecting portion 1200h, the locking wire 2220 can be pulled proximally to release the connection between the locking wire 2220 and the second elastic piece 2210, and then the receiving assembly 2200 is withdrawn as a whole. At this time, the first elastic piece 1230h automatically springs inward to engage with the locking portion 1311h, thus completing the locked connection between the first connecting portion 1200h and the second connecting portion 1300h, and also releasing the connection between the receiving assembly 2200 and the first connecting portion 1200h (as shown in FIG. 1 ). Figure 6G This effectively simplifies the operation process.

[0082] refer to 7A to 7D When the cardiac implant 1000 is implanted, a conventional guidewire insertion operation is first performed, with the distal end of the guidewire 1 surrounding the cardiac tissue 2 and the proximal end of the guidewire 1 remaining outside the body (e.g., Figure 7A As shown); then, the delivery device 2000 and the cardiac implant 1000 are assembled together by the method described above (at this time, the main body 1100 of the cardiac implant 1000 is in a straight structure, and the first connecting portion 1200 is in the first structure), and the proximal end of the guide wire 1 left outside the body is sequentially inserted into the first channel 1104 formed by the second connecting portion 1300 and the main body 1100 of the cardiac implant 1000 and the guide hole in the bulge 2111 of the delivery sheath 2110; next, the cardiac implant 1000 and the delivery device 2000 are pushed into the body as a whole along the guide wire 1; when the distal end of the delivery device 2000 is close to the distal end of the guide wire 1, the distal end of the capture assembly 2300 is operated to pass through the first connecting portion 1200, and the capture device 2340 captures the distal end of the guide wire 1 (as shown in FIG. Figure 7B As shown), the catcher 2340 is then withdrawn to drive the distal end of the guidewire 1 into the cavity of the first connecting portion 1200. At the same time or later, the delivery sheath assembly 2100 and the receiving assembly 2200 of the delivery device 2000 are continued to be advanced along the guidewire 1 to push the cardiac implant 1000, so that the cardiac implant 1000 surrounds the entire cardiac tissue 2 along the guidewire 1, and under the guidance of the guidewire 1, the second connecting portion 1300 enters the first connecting portion 1200 and the locking portion 1311 axially passes over the first elastic piece 1230; then the receiving assembly 2200 is operated to withdraw one of the locking wires 2220, and the first elastic piece 1230 is no longer restricted by the locking wire 2220 and automatically bounces inward into the cavity 1211 of the first connecting portion 1200 and abuts against the locking portion 1311, thereby achieving the locking of the first connecting portion 1200 and the second connecting portion 1300 (as shown). Figure 7CAs shown), the cardiac implant 1000 is formed into a ring; next, the receiving component 2200 is operated to withdraw the remaining lock wires 2220 to release the restriction of the lock wire 2220 on the second elastic piece 2210, thereby unlocking and separating the cardiac implant 1000 from the delivery device 2000; then the capture component 2300 is operated to make the capturer 2340 release the distal end of the guide wire 1 (as shown). Figure 7D Finally, the guidewire 1 and delivery device 2000 are withdrawn from the body, leaving the looped cardiac implant 1000 inside the body. It is understood that similar methods can be used in other embodiments to operate the aforementioned implant systems 3000g and 3000h, and this description will not be repeated here. It is noteworthy that during the implantation of the aforementioned cardiac implant 1000, the distal end of the guidewire 1 is inside the body, while the proximal end is outside the body. Conventional guidewires can be used, eliminating the need for specialized, extended guidewires.

[0083] Compared with the prior art, the cardiac implant 1000 of the embodiment of the present invention can be looped directly and only through the advancement of the delivery device 2000, without the need for additional equipment to pull at the distal end, which effectively reduces the difficulty of looping and makes the operation easier.

[0084] refer to Figures 8A to 8C As shown, the cardiac implant 1000 according to the embodiment of the present invention can be applied to three different cardiac surgeries. Figure 8A As shown, cardiac implant 1000 is used for valve replacement. Specifically, the implant can be placed along the femoral artery, aortic arch, aortic valve orifice, and left ventricle, using the aforementioned implant method. The implant is looped around the leaflets of the mitral valve and / or the adjacent leaflets of the chordae tendineae. The artificial heart valve 3 is then released within the loop formed by the implant. This looped implant 1000 anchors and positions the artificial heart valve 3.

[0085] Or as Figure 8B As shown, cardiac implant 1000 is used for chordae tendineae manipulation. Specifically, cardiac implant 1000 can be implanted via the femoral artery, aortic arch, aortic valve orifice, and left ventricle, forming a loop around the middle of the chordae tendineae of the mitral valve. By controlling the diameter of the looped cardiac implant 1000, the tightness of the chordae tendineae can be regulated, thereby treating conditions such as mitral regurgitation caused by excessive chordae tendineae.

[0086] Or as Figure 8CAs shown, cardiac implant 1000 is used for papillary muscle tightening and regulation. Specifically, it can be implanted via the femoral artery, aortic arch, aortic valve orifice, and left ventricle. Following the aforementioned implantation method, cardiac implant 1000 can be looped around the outer sides of multiple papillary muscles of the mitral valve, thereby constricting the muscles closer together, reducing the size of the left ventricle, and treating symptoms such as heart failure.

[0087] It is understandable that the cardiac implants of other embodiments can also be applied to the above three cardiac surgeries, which will not be described in detail here.

[0088] It can be understood that for mitral valve replacement or repair, the interventional pathway may also be, but is not limited to, via the femoral vein-inferior vena cava-right atrium-left atrium-left ventricle; and each embodiment may also perform tricuspid valve replacement or repair by selecting a suitable interventional pathway.

[0089] The above description is only a preferred specific embodiment of the present invention. The scope of protection of the present invention is not limited to the embodiments listed above. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with this technical field within the technical scope disclosed in the present invention fall within the scope of protection of the present invention.

Claims

1. A cardiac implant, characterized in that: The cardiac implant is configured to be advanced along a guidewire having an annular or substantially annular distal end, and includes a main body, a first connector, and a second connector. The main body includes a straight configuration and a curved configuration, and includes a first end and a second end opposite each other in an axial direction, the first connector being connected to the first end of the main body, and the second connector being connected to the second end of the main body. During advancement, the main body transitions from the straight configuration to the curved configuration, and various portions of the main body are capable of transmitting axial force and movement to avoid axial stacking. The second connector is connectable to and lockable with the first connector, thereby forming a loop with the main body in the curved configuration. The first connector and the first end of the main body are movable relative to each other, the first connector including a first configuration adjacent to and located on one side of the first end of the main body, and a second configuration extending axially from the first end of the main body. When the main body transitions from the straight configuration to the curved configuration, the first connector transitions from the first configuration to the second configuration.

2. The cardiac implant according to claim 1, wherein The main body portion includes a strip structure and / or a tubular structure, wherein the tubular structure includes a plurality of cutting grooves; and the strip structure and / or tubular structure has at least one ridge extending continuously in the axial direction between the first end and the second end of the main body portion; during the process of the main body portion transforming from the straight structure to the curved structure, the physical length of the ridge remains unchanged.

3. The cardiac implant according to claim 1, wherein The material of the main body is selected from one or more of the following groups: nickel-titanium alloy, stainless steel, cobalt-chromium alloy, polytetrafluoroethylene, polyetheretherketone, polyethylene and nylon.

4. The cardiac implant according to claim 1, wherein The first connecting part includes a cylinder and at least one first elastic piece connected to the cylinder, and the second connecting part includes at least one locking part, at least one of which can enter the cylinder and engage with the first elastic piece, thereby locking the first connecting part and the second connecting part.

5. The cardiac implant according to claim 4, characterized in that A limiting hole is provided on the first elastic piece, and the limiting hole cooperates with a receiving component of a delivery device for delivering the cardiac implant to keep the first elastic piece radially outwardly expanded.

6. The cardiac implant according to claim 5, characterized in that The cylinder of the first connecting part has a cavity axially extending through it and an opening radially extending through its side wall. The first elastic piece is arranged corresponding to the opening of the cylinder, wherein in the natural state of the first elastic piece, the free end of the first elastic piece extends into the cavity of the cylinder, and the free end of the first elastic piece can expand radially outward through the opening under the action of external force, so that the receiving component cooperates with the limiting hole.

7. The cardiac implant according to claim 5, characterized in that The cylinder is further provided with at least one connecting hole for cooperating with the receiving assembly of the conveying device to connect the first connecting portion and the receiving assembly.

8. The cardiac implant according to claim 7, characterized in that The connecting hole is axially aligned with the limiting hole on the first elastic piece.

9. The cardiac implant according to claim 4, characterized in that The cylinder of the first connecting portion is further provided with a connecting position for movably connecting to the first end of the main body via one or more intermediate connecting elements.

10. The cardiac implant according to claim 9, characterized in that The first end of the main body is provided with two adjacent first through holes, and the connecting position includes two adjacent second through holes arranged along the circumference of the cylinder. One first through hole corresponds to one second through hole and is movably connected via the intermediate connecting element.

11. The cardiac implant according to claim 4, characterized in that The first connecting portion further includes an outwardly expanding section connected to one end of the cylinder, for guiding the second connecting portion to be connected to the first connecting portion.

12. The cardiac implant according to claim 1, wherein The cardiac implant further includes a covering film covering at least a portion of the main body, the first connecting portion, and the second connecting portion.

13. An implant system, characterized in that: The invention comprises a cardiac implant according to any one of claims 1 to 12 and a delivery device for delivering the cardiac implant, wherein the delivery device comprises a delivery sheath, a receiving assembly, and a capture assembly movably arranged in the inner cavity of the delivery sheath for capturing a guide wire, wherein the receiving assembly is detachably connected to the first connecting portion of the cardiac implant.

14. The implant system according to claim 13, wherein: The receiving assembly includes at least one second spring piece and at least one locking wire. The second spring piece is fixedly connected to the distal end of the delivery sheath. The second spring piece can pass through the connecting hole or the limiting hole on the first connecting part and expand radially outward under the action of external force. The second spring piece is provided with a locking hole, and the locking wire is used to cooperate with the limiting hole and / or the locking hole.

15. The implant system according to claim 14, wherein: At least one axial through cavity is provided in the wall of the delivery sheath tube, and one of the locking wires is movably arranged in the axial through cavity.

16. The implant system according to claim 14, wherein: The receiving assembly further comprises a cutting tube movably arranged in the inner cavity of the delivery sheath, the cutting tube comprises a plurality of circumferential cutting grooves, and the at least one locking wire is fixedly connected to the distal end of the cutting tube.

17. The implant system according to claim 14, wherein: The locking wire is of a single-wire structure and is used for plugging and matching with the limiting hole and / or the locking hole.

18. The implant system according to claim 14, wherein: The locking wire adopts a U-shaped double-wire structure passing through the limiting hole and / or the locking hole, and is used to pull the first elastic piece or the second elastic piece of the first connecting part to expand radially outward.

19. The implant system according to claim 13, wherein: The delivery sheath tube has a bulging portion on its wall, and the bulging portion has a guide hole for guiding a guide wire. The main body of the cardiac implant and the second connecting portion together form a guide wire channel, and the guide hole and the guide wire channel are for the guide wire to pass through.

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