Artificial chordal control system

Abstract

The present application provides an artificial chord regulation system, which includes an implant for accommodating the artificial chord, the implant including a chuck for hooking the artificial chord, a push piece disposed in the chuck, and an adjustment assembly connected to the proximal end of the push piece, wherein the chuck is provided with a plurality of slots, the push piece moves axially toward the distal end in the chuck, and the distal end surface of the push piece pushes the artificial chord hooked by the chuck to increase the length of the artificial chord accommodated in the chuck, and the adjustment assembly is engaged in the slot to fix the position of the push piece in the chuck. The adjustment assembly adjusts and fixes the position of the push piece in the chuck, and adjusts the length of the artificial chord in the chuck, thereby achieving regulation of the artificial chord.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an artificial tendon regulation system. Background Art

[0002] Mitral regurgitation is one of the common heart valve diseases. The main causes are rheumatic heart disease, myxomatous degeneration of the mitral valve, ischemic heart disease, myocardial disease, etc., which lead to lesions in the valve ring, leaflets, chordae tendineae or papillary muscles in the mitral valve structure, resulting in the inability of the mitral valve leaflets to close completely.

[0003] Minimally invasive interventional surgery to treat mitral regurgitation is a better choice for most heart valve diseases. The main interventional treatment methods usually include artificial chordal implantation, mitral annuloplasty and mitral valve edge-to-edge repair. Among them, implanting artificial chords on the leaflets can effectively treat mitral regurgitation caused by chordal rupture, leaflet prolapse, etc., while maintaining the physiological integrity of the mitral valve structure. However, after a period of time after the artificial chords have been implanted, due to changes in factors such as heart capacity, it is often necessary to adjust the length of the artificial chords again to avoid heart valve dysfunction such as mitral valve regurgitation.

[0004] The prior art discloses an artificial chord length adjustment device, which first uses a hook to capture the artificial chord, and then uses an instrument to stretch the chord. The amount of stretching of the artificial chord determines the amount of adjustment of the artificial chord length. Specifically, when the artificial chord is stretched to meet the length control requirement, the artificial chord is fixed with two positioning clips to achieve artificial chord length adjustment. However, this technology has the disadvantages of overly complex control instruments, difficulty in capturing chords, and unstable chord length adjustment. These problems will lead to the risk of surgical failure or ineffective adjustment during artificial chord length adjustment. Summary of the Invention

[0005] The purpose of the present invention is to provide an artificial tendon regulation system in response to the defects of the above-mentioned prior art. The system has a simple structure and is easy to operate. It is not only easier to capture the tendons, but also causes less damage to the tendons. In addition, the regulation method is flexible, and the length of the artificial tendons can be accurately and flexibly quantitatively adjusted according to the actual clinical needs of the patient.

[0006] An embodiment of the present application provides an artificial tendon regulation system, wherein the artificial tendon regulation system includes an implant for accommodating the artificial tendon, the implant includes a chuck for hooking the artificial tendon, a push piece arranged in the chuck and an adjustment component connected to the proximal end of the push piece, a plurality of slots are provided in the chuck, the push piece moves axially toward the distal end in the chuck, and the distal end surface of the push piece pushes the artificial tendon hooked by the chuck to increase the length of the artificial tendon accommodated in the chuck, and the adjustment component is snapped into the slot to fix the position of the push piece in the chuck.

[0007] The artificial chord adjustment system provided in the embodiments of the present application uses an implant chuck to hook the artificial chord, then uses a pusher to push the artificial chord into the chuck. An adjustment assembly adjusts and fixes the pusher in the chuck to adjust the length of the artificial chord within the chuck, thereby achieving artificial chord adjustment. Compared with existing technologies, this system has at least the following advantages:

[0008] (1) The chordae can be captured and regulated by opening and closing the chuck and the ejector, which is easy to operate;

[0009] (2) After the chuck and the ejector are opened, a larger tendon capture space is formed, making it easier to capture the tendon;

[0010] (3) The chuck and ejector contact the tendons through smooth surfaces, reducing tendon damage and improving device safety;

[0011] (4) By adjusting the position of the ejector in the chuck through the adjustment component, the length of the artificial tendon can be accurately and flexibly adjusted quantitatively according to the patient's actual clinical needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 is a schematic diagram of an artificial chordal regulation system provided in an embodiment of the present application;

[0014] Figure 2 Schematic diagram of a delivery device and implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0015] Figure 3 is a cross-sectional view of a delivery device and an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0016] Figure 4 is a cross-sectional view of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0017] Figure 5 1 is a three-dimensional schematic diagram of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0018] Figure 6 is a cross-sectional view of an implant of the artificial chord regulation system provided by an embodiment of the present application in another state;

[0019] Figure 7 is a cross-sectional view of an implant of the artificial chord regulation system provided by an embodiment of the present application in another state;

[0020] Figure 8 is a three-dimensional schematic diagram of a clamp of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0021] Figure 9 is a cross-sectional view of a clamp of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0022] Figure 10 1 is a bottom view of a clamp of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0023] Figure 11 1 is a perspective schematic diagram of an ejector member of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0024] Figure 12 1 is a front view of an ejector member of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0025] Figure 13 1 is a side view of an ejector member of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0026] Figure 14 Schematic diagram of an adjustment component of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0027] Figure 15 1 is a perspective schematic diagram of an adjustment component of an implant of an artificial chordal regulation system provided in an embodiment of the present application;

[0028] Figure 16 Schematic diagram of an elastic member of an adjustment assembly of an artificial chord regulation system provided in an embodiment of the present application;

[0029] Figure 17 is another schematic diagram of the elastic member of the adjustment assembly of the artificial chord regulation system provided in an embodiment of the present application;

[0030] Figure 18is another schematic diagram of the elastic member of the adjustment assembly of the artificial chord regulation system provided in an embodiment of the present application;

[0031] Figure 19 is a schematic diagram of an elastic member provided in another embodiment of the present application;

[0032] Figure 20 is a schematic diagram of an elastic member provided in another embodiment of the present application;

[0033] Figure 21 is a schematic diagram of an elastic member provided in another embodiment of the present application;

[0034] Figure 22 Schematic diagram of a connecting sleeve of a delivery device of an artificial chord regulation system provided in an embodiment of the present application;

[0035] Figure 23 2 is a side view of a connecting sleeve of a delivery device of an artificial chord regulation system provided in an embodiment of the present application;

[0036] Figure 24 1 is a top view of a connecting sleeve of a delivery device of an artificial chord regulation system provided in an embodiment of the present application;

[0037] Figure 25 Schematic diagram of the core shaft of the delivery device of the artificial chord regulation system provided in an embodiment of the present application;

[0038] Figure 26 This is a schematic diagram of the connection between the first adjustment rod, the second adjustment rod, and the adjustment assembly of the delivery device of the artificial chord regulation system provided in an embodiment of the present application;

[0039] Figure 27 Schematic diagram of the separation of the second adjustment rod and the adjustment assembly of the delivery device of the artificial chord regulation system provided in an embodiment of the present application;

[0040] Figure 28 Schematic diagram of a second adjustment rod of a delivery device of an artificial chord regulation system provided in an embodiment of the present application;

[0041] Figure 29 Schematic diagram of a first adjustment rod of a delivery device of an artificial chord regulation system provided in an embodiment of the present application;

[0042] Figure 30 1 is a perspective schematic diagram of a first regulating rod of an artificial chord regulation system provided in an embodiment of the present application;

[0043] Figure 31 This is a schematic diagram of the connection between the delivery device and the implant of the artificial chord regulation system provided in an embodiment of the present application;

[0044] Figure 32Schematic diagram of the release of the delivery device and implant of the artificial chord regulation system provided in an embodiment of the present application;

[0045] Figure 33 Schematic diagram of the outer tube of the first adjustment rod of the delivery device of the artificial chord regulation system provided in an embodiment of the present application;

[0046] Figure 34 Schematic diagram of a driving device of an artificial chord regulation system provided in an embodiment of the present application;

[0047] Figure 35 is an exploded schematic diagram of a driving device of an artificial chord regulation system provided in an embodiment of the present application;

[0048] Figure 36 yes Figure 34 An enlarged schematic diagram of the X portion of the driving device;

[0049] Figure 37 Schematic diagram of an application scenario of the artificial chord regulation system provided in an embodiment of the present application;

[0050] Figure 38 is a partial schematic diagram of the artificial chord regulation system provided in an embodiment of the present application during the regulation process;

[0051] Figure 39 is a partial schematic diagram of the artificial chord regulation system provided by an embodiment of the present application in another state during the regulation process;

[0052] Figure 40 is a cross-sectional schematic diagram of an implant of the artificial chordal regulation system provided in an embodiment of the present application during regulation;

[0053] Figure 41 Schematic diagram of an implant of an artificial chordal regulation system provided in an embodiment of the present application during regulation;

[0054] Figure 42 This is a schematic diagram of the changing process of regulating artificial chords by the artificial chord regulation system provided in an embodiment of the present application;

[0055] Figure 43 Schematic diagram of an implant of an artificial chordal regulation system provided in an embodiment of the present application during regulation;

[0056] Figure 44 Schematic diagram of an implant of an artificial chordal regulation system provided in an embodiment of the present application during regulation;

[0057] Figure 45 is a partial schematic diagram of the artificial chord regulation system provided by an embodiment of the present application in another state during the regulation process;

[0058] Figure 46 is a partial schematic diagram of the artificial chord regulation system provided by an embodiment of the present application in another state during the regulation process;

[0059] Figure 47 It is a partial cross-sectional schematic diagram of the artificial chord regulation system provided in an embodiment of the present application in another state during the regulation process. DETAILED DESCRIPTION

[0060] To more clearly describe the structure of the artificial chordal manipulation system, the limiting terms "proximal" and "distal" used in this disclosure are commonly used in interventional medicine. Specifically, "distal" refers to the end away from the operator during the surgical procedure, while "proximal" refers to the end closer to the operator during the surgical procedure.

[0061] See also Figure 1 、 Figure 2 and Figure 3 The embodiment of the present application provides an artificial chord regulation system 9000 for regulating the length of the artificial chords 01 implanted in the valve leaflet to ensure the normal function of the heart valve. The artificial chord regulation system 9000 includes an implant 1000 for accommodating the artificial chords 01. The implant 1000 includes a chuck 1100, a push piece 1200 disposed in the chuck 1100, and an adjustment assembly 1300 connected to the proximal end of the push piece 1200. The chuck 1100 is provided with a plurality of slots 1101. The push piece 1200 moves axially toward the distal end in the chuck 1100. The distal end surface of the push piece 1200 pushes the artificial chord 01 hooked by the chuck 1100 to increase the length of the artificial chord 01 accommodated in the chuck 1100. The adjustment component 1200 is inserted into the card slot 1101 to fix the position of the ejector 1200 in the chuck 1100. When adjusting, the tendon can be captured and adjusted by opening and closing the chuck, which is easy to operate; the opening and closing of the chuck forms a larger tendon capture space, which makes it easier to capture the tendon; the chuck and the ejector contact the tendon through a smooth surface, which reduces tendon damage and improves the safety of the instrument; the position of the ejector in the chuck is adjusted by the adjustment component, and the length of the artificial tendon can be accurately and flexibly adjusted quantitatively according to the actual clinical needs of the patient.

[0062] The artificial tendon regulation system 9000 of this embodiment also includes a conveying device 2000 and a driving device 4000 for conveying the implant 1000. The conveying device 2000 is used to move the chuck 1100 and the pushing member 1200 of the implant 1000 to the target position, and then the driving device 4000 is used to control the pushing member 1200 through the conveying device 2000 to push the artificial tendon 01 into the chuck 1100, adjust the position of the pushing member 1200 in the chuck 1100, adjust the length of the artificial tendon 01 in the chuck 1100, and under the limiting action of the adjustment component 1300, the artificial tendon 01 is stably regulated, meeting the regulation requirements of the artificial tendon 01 and reducing the risk of surgical failure.

[0063] See also Figure 1 、 Figure 4 、 Figure 5 and Figure 6 It is understood that when using the artificial chord regulation system 9000, the operator inserts the artificial chord regulation system 9000 into the patient's body through a small incision such as the femoral vein using a hollow guide device (not shown) such as an adjustable sheath or a pre-shaped catheter. The operator then manipulates the guide device, delivery device 2000, and drive device 4000 outside the patient's body to adjust the position of the implant 1000. Once the implant 1000 reaches the intended treatment site, the operator manipulates the drive device 4000 to control the pusher 1200 via the delivery device 2000 to push the artificial chord 01 into the chuck 1100. The operator then controls the adjustment assembly 1300 to adjust the length of the artificial chord 01. Finally, the operator manipulates the drive device 4000 to separate the delivery device 2000 from the implant 1000, removing the remaining devices except the implant 1000 from the body, thereby achieving regulation of the artificial chord 01.

[0064] Implant 1000 can be implanted in the heart and connected to artificial chordae tendineae 01. Implant 1000 includes a chuck 1100, an ejector 1200, and an adjustment assembly 1300. Chuck 1100, ejector 1200, and adjustment assembly 1300 are all detachably connected to the distal end of a delivery device 2000. Chuck 1100 can be opened and closed relative to ejector 1200 to hook artificial chordae tendineae 01. After chuck 1100 hooks artificial chordae tendineae 01, ejector 1200 pushes artificial chordae tendineae 01 into chuck 1100, forming a U-shape within chuck 1100. This allows the length of artificial chordae tendineae 01 within chuck 1100 to be adjusted, thereby adjusting the overall length of artificial chordae tendineae 01.

[0065] See also Figure 7 、 Figure 8 、 Figure 9 and Figure 10The chuck 1100 comprises a hollow cylindrical body with both ends open, having a proximal end 1110 and a distal end 1120 disposed opposite each other. The proximal end 1110 is connected to the delivery device 2000. The proximal and distal ends of the chuck 1100 are chamfered at their junctions with the outer peripheral side surfaces of the chuck 1100 to ensure a smooth outer surface of the chuck 1100 and prevent the chuck 1100 from damaging the artificial chord 01 or the patient's tissue. The chuck 1100 is provided with an axially extending receiving hole 1109, that is, the receiving hole 1109 extends from the proximal end to the distal end of the chuck 1100, and the ejector 1200 is pushed into the receiving hole 1109 from the proximal end of the chuck 1100. The receiving hole 1109 is chamfered at both its proximal and distal ends to prevent the opening of the receiving hole 1109 from damaging the artificial chord 01. The inner surface of the receiving hole 1109 is an arc surface to avoid damaging the artificial tendon. Of course, in other embodiments, the inner surface of the receiving hole 1109 can also be an elliptical surface, or a rectangular surface. The inner diameter of the receiving hole 1109 is adjusted according to the outer diameter of the ejection member 1200 and the outer diameter of the artificial tendon 01. The inner diameter of the receiving hole 1109 is roughly equal to the sum of the outer diameter of the ejection member 1200 and twice the outer diameter of the artificial tendon 01. The depth of the receiving hole 1109 is set according to the maximum length of the artificial tendon 01 that needs to be adjusted. The depth of the receiving hole 1109 can be roughly half of the maximum length of the artificial tendon 01 that needs to be adjusted.

[0066] In this embodiment, the inner surface of the receiving hole 1109 and the outer peripheral surface of the ejection member 1200 are clearance-matched and can move relative to each other. The proximal end 1110 of the chuck 1100 is hook-shaped, making it easy to hook the artificial chord 01 and pull it into the interior of the chuck 1100. Specifically, the proximal end 1110 of the chuck 1100 is provided with a hook groove 1108 that connects to the receiving hole 1109 and extends through the outer peripheral sidewall of the chuck 1100. The hook groove 1108 is capable of hooking the artificial chord 01. The hook groove 1108 has openings on the outer peripheral side and proximal end of the chuck 1100. The connection between the hook groove 1108, the outer peripheral side, proximal end, and the inner surface of the receiving hole 1109 of the chuck 1100 is rounded and chamfered to prevent damage to the artificial chord 01. In actual clinical use, artificial chords 01 are typically made of e-PTFE suture or PET suture with an outer diameter of 0.2mm to 0.5mm. The number of artificial tendon 01 is usually two. After the artificial tendon 01 is implanted in the heart, endothelial cells crawl on the sutures, which will increase the outer diameter of the artificial tendon 01. In order to ensure that the chuck 1100 can hook the endothelialized artificial tendon 01 and ensure that the artificial tendon 01 can smoothly enter the receiving hole 1109, it is also necessary to ensure the stability of the implant 1000 implanted on the artificial tendon 01 so that it is firm and does not fall off, this embodiment forms a larger tendon capture space by opening and closing the chuck 1100, and cooperates with the hook groove 1108 that runs through the outer peripheral side wall of the chuck 1100 to hook the artificial tendon 01, reducing the difficulty of capture and simplifying operation; in addition, the cylindrical receiving hole 1109 cooperates with the push piece 1200 to form a receiving space for the artificial tendon 01, and the receiving space has an interference fit with the artificial tendon 01, ensuring the stability of the implant 1000 on the artificial tendon 01.

[0067] The chuck 1100 is provided with a plurality of slots 1101. Specifically, in this embodiment, the inner wall of the receiving hole 1109 is provided with a plurality of slots 1101 arranged along the depth direction. Each slot 1101 is used to cooperate with the adjustment assembly 1300 and position the ejection member 1200, thereby fixing the position of the ejection member 1200 in the chuck 1100 and adjusting the length of the artificial tendon 01 within the receiving hole 1109. Specifically, the inner surface of the receiving hole 1109 is provided with two rows of slots 1101, the two rows of slots 1101 being arranged opposite each other, and each row of slots 1101 being arranged along the depth direction of the receiving hole 1109. By moving the ejection member 1200 within the receiving hole 1109 and controlling the adjustment assembly 1300 to cooperate with the retaining slot 1101, the ejection member 1200 is fixed within the receiving hole 1109. Different retaining slots 1101 define different positions of the ejection member 1200 within the receiving hole 1109. Since the position of the ejection member 1200 within the receiving hole 1109 determines the length of the artificial chord 01 pushed into the receiving hole 1109, the length of the artificial chord 01 accommodated in the receiving hole 1109 of the chuck 1100 can be adjusted. Therefore, the length of the artificial chord 01 can be precisely and flexibly adjusted based on the patient's actual clinical needs. Of course, in other embodiments, a limiting slide groove may be provided in the accommodating hole 1109, and the peripheral side surface of the ejecting member 1200 may be provided with a limiting slide rail that frictionally cooperates with the limiting slide groove. The ejecting member 1200 may be frictionally positioned by using the adjustment component 1300, and the ejecting member 1200 may be infinitely positioned in the accommodating hole 1109, thereby facilitating the regulation of the length of the artificial tendon 01 in the accommodating hole 1109.

[0068] The proximal end surface of the chuck 1100 is provided with two threaded holes 1103 adjacent to the opening of the receiving hole 1109. These two threaded holes 1103 are used for threaded connection with the delivery device 2000. This allows the opening and closing movement of the chuck 1100 to be remotely controlled from outside the patient's body via the drive device 4000 and the delivery device 2000, and the connection between the chuck 1100 and the delivery device 2000 to retain the implant 1000 within the patient's body. The chuck 1100 can be made of metal or a polymer material, such as SUS316L stainless steel or PEEK.

[0069] See also Figure 5 、 Figure 6 and Figure 7The ejector 1200 is received in the receiving hole 1109 of the chuck 1100, and is loosely fitted with the chuck 1100 so as to be movable relative to the chuck 1100. The operator can control the forward and backward movement of the chuck 1100 to hook the artificial tendon 01 and pass it through the hook groove 1108. The chuck 1100 and the ejection piece 1200 can open and close with each other under the transmission action of the conveying device 2000. When the chuck 1100 and the ejection piece 1200 are opened and moved away from each other, there is a distance between the chuck 1100 and the ejection piece 1200, and the artificial tendon 01 can be allowed to pass between the chuck 1100 and the ejection piece 1200, so that the chuck 1100 can hook the artificial tendon 01 conveniently; when the chuck 1100 hooks the artificial tendon 01, that is, after the artificial tendon 01 passes into the hook groove 1108, the chuck 1100 is gradually closed with the ejection piece 1200 from the distal end to the proximal end, and the ejection piece 1200 gradually enters the accommodating hole 1109 of the chuck 1100, thereby capturing the artificial tendon 01. In addition, the artificial tendon 01 is pushed into the receiving hole 1109 by the pushing piece 1200 and forms a U-shaped bend. By adjusting the depth of the pushing piece 1200 in the chuck 1100, that is, adjusting the degree of closing between the pushing piece 1200 and the chuck 1100, the length of the artificial tendon 01 in the chuck 1100 is changed to achieve the regulation of the overall length of the artificial tendon 01.

[0070] It can be understood that by utilizing the larger opening space between the chuck 1100 and the ejector 1200, the capture space for the artificial tendon between the chuck 1100 and the ejector 1200 can be increased, and the chuck 1100 can be used to hook the artificial tendon 01 more quickly and efficiently, thereby improving the efficiency of the control operation.

[0071] See also Figure 7 、 Figure 11 、 Figure 12 and Figure 13In this embodiment, the ejection member 1200 is in the shape of a hollow rectangular block. The ejection member 1200 has an abutting top end 1210 near the distal end and a connecting end 1220 near the proximal end. The abutting top end 1210 abuts against the artificial tendon 01 and pushes the artificial tendon 01 into the receiving hole 1109. The connecting end 1220 is detachably connected to the conveying device 2000. Specifically, the ejection member 1200 includes two first mating side surfaces 1209 that are clearance-matched with the inner surface of the receiving hole 1109, and two second mating side surfaces 1208 connected between the two first mating side surfaces 1209. The first mating side surface 1209 is clearance-matched with the inner surface of the receiving hole 1109 to ensure that the ejection member 1200 can slide along the depth direction of the receiving hole 1109. The first mating side surface 1209 is a circular arc surface. There is a receiving space between the second mating side surface 1208 and the inner surface of the receiving hole 1109, and the receiving space allows the artificial tendon 01 to pass through. The maximum spacing of the accommodation spaces is roughly equal to the outer diameter of the artificial chord 01. This ensures that, after the ejector 1200 pushes the artificial chord 01 into the accommodation hole 1109, the artificial chord 01 remains securely in the accommodation hole 1109. Furthermore, the ejector 1200 and the chuck 1100 do not damage the artificial chord 01. Because both the chuck 1100 and the ejector 1200 contact the artificial chord through smooth surfaces, damage to the chord is effectively reduced, improving device safety.

[0072] More specifically, the abutting end 1210 of the ejection member 1200 is provided with an arc-shaped concave surface 1203. This concave surface 1203 is used to accommodate and pass the artificial chord 01 and to push the artificial chord 01 into the receiving hole 1109. To prevent damage to the artificial chord 01, the connection between the concave surface 1203 and the abutting end 1210 is provided with an arc chamfer, making the surface of the abutting end 1210 of the ejection member 1200 as smooth as possible. It will be understood that the inner surface of the receiving hole 1109 is smoothly designed, and the outer surface of the chuck 1100 is smoothly connected to the inner surface of the receiving hole 1109 via the arc chamfer, so that the contact point between the chuck 1100 and the artificial chord 01 is smooth and flat, thus preventing damage to the artificial chord 01 at the contact point between the chuck 1100 and the artificial chord 01. Moreover, the end face of the top end 1210 of the ejecting member 1200 is smoothly set, and the peripheral side surface of the ejecting member 1200 is smoothly set, and the connection between the end face of the top end 1210 and the peripheral side surface of the ejecting member 1200 is smoothly connected through a circular arc chamfered surface, so that the contact between the ejecting member 1200 and the artificial tendon is smooth and round, avoiding damage to the artificial tendon and improving the safety of the device.

[0073] In this embodiment, the ejector 1200 is provided with a receiving groove 1207 along the axial direction. The receiving groove 1207 accommodates the adjustment assembly 1300, and the adjusting assembly 1300 is used to fix the ejector 1200 to the chuck 1100. The outer wall of the ejector 1200 is provided with a through groove 1201 connected to the receiving groove 1207. Specifically, the ejector 1200 is provided with two through grooves 1201 on each of the two first mating side surfaces 1209. Each through groove 1201 extends through the inner wall of the receiving groove 1207, thereby connecting the receiving groove 1207 with the clamping groove 1101 of the chuck 1100. A portion of the adjustment assembly 1300 located in the receiving groove 1207 extends from the through groove 1201 and is clamped into the clamping groove 1101. Therefore, the relative position between the ejector 1200 and the chuck 1100 is fixed by the adjustment assembly 1300, thereby achieving the function of fixing and regulating the artificial tendon 01. The ejector 1200 also has two fixing grooves 1202 on its two second mating side surfaces 1208, arranged axially symmetrically. These fixing grooves 1202 are designed to engage with portions of the conveyor device 2000, enabling connection and disconnection between the ejector 1200 and the conveyor device 2000. The ejector 1200 can be made of metal, such as SUS316L stainless steel, or a polymer material such as PEEK.

[0074] See also Figure 14 and Figure 15 In this embodiment, the adjustment assembly 1300 includes an elastic member 1310 and a connecting member 1320. The elastic member 1310 is received in the receiving groove 1207. When the elastic member 1310 is in an extended state, its end portion can extend through the through groove 1201 and elastically snap into the slot 1101. The elastic member 1310 can also be completely received in the receiving groove 1207 in an elastically compressed state, so that the elastic member 1310 is separated from the chuck 1100, thereby achieving relative movement between the chuck 1100 and the ejection member 1200. The connecting member 1320 is fixedly connected to the elastic member 1310 and is detachably connected to the conveying device 2000. The connecting member 1320 transmits the transmission power of the conveying device 2000 to the elastic member 1310, so that the elastic member 1310 can slide in the receiving groove 1207 to a position where it partially extends out of the through groove 1201.

[0075] It can be understood that by adjusting the locking cooperation between the push-out member 1200 and the slot 1101 by the adjustment component 1300, and providing multiple slots 1101 inside the chuck 1100 to accurately position the push-out member 1200, the length of the artificial tendon 01 can be accurately and flexibly quantitatively adjusted according to the actual clinical needs of the patient.

[0076] For details, please refer to Figure 15 、 Figure 16 、 Figure 17 and Figure 18The elastic member 1310 includes a stabilizing portion 1311 connected to the connecting member 1320, a curved portion 1312 connected to the stabilizing portion 1311, and a telescopic portion 1313 that expands and contracts as the curved portion 1312 bends and deforms. The end of the telescopic portion 1313 away from the curved portion 1312 can be inserted into the slot 1101 through the through slot 1201. The stabilizing portion 1311 is generally a rectangular plate. The two ends of the stabilizing portion 1311 in the longitudinal direction are respectively connected to the two curved portions 1312. The two curved portions 1312 are bent relative to the stabilizing portion 1311. When the elastic member 1310 is in a naturally stretched state, the curved portion 1312 and the stabilizing portion 1311 form a generally obtuse angle. When the elastic member 1310 is fully accommodated in the accommodation slot 1207, the elastic member 1310 is in a tightly compressed state, the telescopic portion 1313 contacts the inner wall of the accommodation hole 1109, and the curved portion 1312 and the stabilizing portion 1311 form a generally acute angle. When the telescopic portion 1313 extends out of the through slot 1201 , the elastic member 1310 is in a semi-compressed state, the bent portion 1312 elastically contacts the inner wall of the accommodating hole 1109 , and the bent portion 1312 is substantially perpendicular to the stabilizing portion 1311 .

[0077] Of course, in another embodiment, Figure 19 、 Figure 20 and Figure 21 As shown, the curved portion 1312 can also be in the form of a bent plate. When the elastic member 1310 is in its naturally extended state, the curved portion 1312 drives the telescopic portion 1313 slightly closer to the stable portion 1311, resulting in a smaller volume of the elastic member 1310 in its naturally extended state. When the elastic member 1310 is in its elastically compressed state, the telescopic portion 1313 exerts a relatively small elastic force on the ejection member 1200, preventing the elastic member 1310 from being difficult to move within the ejection member 1200.

[0078] See also Figure 14 and Figure 15 Connecting member 1320 includes a limiting washer 1321 and a release block 1330. Release block 1330 passes through stabilizing portion 1311. Limiting washer 1321 is connected to one end of release block 1330 that passes through stabilizing portion 1311 and abuts against the distal end of stabilizing portion 1311 to prevent release block 1330 from separating from stabilizing portion 1311, thereby ensuring a secure connection between connecting member 1320 and elastic member 1310. Preferably, limiting washer 1321 is laser welded to release block 1330 and stabilizing portion 1311.

[0079] The adjustment assembly 1300 interfaces with the delivery device 2000 by providing a first hook 1331 at the proximal end of the adjustment assembly 1300. The first hook 1331 has a certain curvature and mates with the distal end of the delivery device 2000. Specifically, the first hook 1331 is located proximal to the release block 1330 of the connector 1320 of the adjustment assembly 1300. When the first hook 1331 of the release block 1330 mates with a portion of the delivery device 2000, the portion of the delivery device 2000 prevents the release block 1330 from disengaging from the delivery device 2000, thereby achieving connection between the adjustment assembly 1300 and the delivery device 2000. When the telescopic portion 1313 of the elastic member 1310 engages the engagement slot 1101, the delivery device 2000 is withdrawn, and the first hook 1331 of the connector 1320 disengages from the delivery device 2000, allowing the implant 1000 to remain within the patient's body. Elastic member 1310 is made of a metal material with shape memory properties, preferably nickel-titanium alloy. During the production process, a nickel-titanium sheet is first laser cut, then placed in a mold and shaped with high-temperature water cooling, resulting in the desired elastic member 1310. The stopper 1321 and release block 1330 are preferably made of SUS316L stainless steel.

[0080] See also Figure 1 、 Figure 22 、 Figure 23 and Figure 24 In this embodiment, the conveying device 2000 includes a tube body assembly 2900 connected to the driving device 4000 and a connecting assembly 2800 connected to the tube body assembly 2900. The connecting assembly 2800 is detachably connected to the implant 1000. When the connecting assembly 2800 is connected to the implant 1000, it can drive the chuck 1100 to open and close relative to the ejection member 1200 to hook the artificial tendon 01, and drive the telescopic portion 1313 of the elastic member 1310 to slide into the extended through groove 1201. When the connecting assembly 2800 is separated from the implant 1000, the connecting assembly 2800 is simultaneously separated from the ejection member 1200 and the connecting member 1320, so that the implant 1000 can remain in the patient's body.

[0081] In this implementation, please refer to Figure 1 、 Figure 3 , Figures 23 to 26The connecting assembly 2800 includes a connecting sleeve 2100, a core shaft 2300, a first adjusting rod 2200, and a second adjusting rod 2400. The connecting sleeve 2100 is connected to the distal end of the tube assembly 2900. The connecting sleeve 2100 provides telescopic guidance for the core shaft 2300, the first adjusting rod 2200, and the second adjusting rod 2400. The core shaft 2300 is movably disposed within the connecting sleeve 2100, with the distal end of the core shaft 2300 being detachably connected to the proximal end of the chuck 1100. The first adjusting rod 2200 is slidable and rotatable relative to the connecting sleeve 2100. The distal end of the first adjusting rod 2200 extends out of the connecting sleeve 2100 and is detachably connected to the ejector 1200. The second adjusting rod 2400 is movably disposed within the first adjusting rod 2200, slidable relative to the connecting sleeve 2100 and the first adjusting rod 2200, and docked with the connecting member 1320.

[0082] For details, see Figures 22 to 24 The connecting sleeve 2100 includes an upper cover 2110 and a cylinder 2120 that are aligned with each other. The cylinder 2120 is connected to the tube body assembly 2900. The proximal end of the upper cover 2110 is provided with at least one axially extending through hole 2111. The through hole 2111 is used to pass the core shaft 2300 and serves as a telescopic guide for the core shaft 2300. Preferably, there are two through holes 2111 to pass two core shafts 2300, and the distal ends of the two core shafts 2300 are respectively screwed to the two threaded holes 1103 of the chuck 1100, so that the core shaft 2300 drives the chuck 1100 to move in the proximal or distal direction relative to the conveying device 2000 more stably. The distal end of the upper cover 2110 is provided with a through hole 2112 at the central axis for passing the first adjusting rod 2200. The two sides of the insertion hole 2112 are symmetrically provided with raised bone positions 2113. The two bone positions 2113 are used to cooperate with the receiving groove 1207 of the ejection member 1200, and play a role in limiting the ejection member 1200, limiting the axial rotation of the ejection member 1200 around the connecting sleeve 2100. The proximal end surface 2121 of the cylinder 2120 is connected to the distal end of the tube body assembly 2900 by means of snapping, gluing, etc. The connecting sleeve 2100 is preferably made of a metal material as a whole, such as SUS304 stainless steel, and polymer materials such as POM can also be selected. The upper cover 2110 and the cylinder 2120 are separately molded and connected by laser, bonding, snap-fitting, interference fit, etc., preferably laser welding. In other embodiments, the upper cover 2110 and the cylinder 2120 can also be integrally molded.

[0083] See also Figure 25Mandrel 2300 includes a rod 2302 having a certain axial length. A threaded section 2301 is provided at the distal end of rod 2302. Threaded section 2301 is threadedly engaged with threaded hole 1103 of chuck 1100, thereby connecting mandrel 2300 to chuck 1100. Rod 2302 is inserted into through hole 2111 of connecting sleeve 2100. Mandrel 2300 is made of metal, such as SUS304 stainless steel.

[0084] See also Figure 26 and Figure 27 The second adjusting rod 2400 is movably inserted into the first adjusting rod 2200, which means that the first adjusting rod 2200 is provided with a hollow hole 2201, and the second adjusting rod 2400 is movably inserted into the hollow hole 2201, and the distal end of the second adjusting rod 2400 can be extended or retracted into the hollow hole 2201. Figure 28 The distal end of the second adjustment rod 2400 is provided with a second hook 2401 having a certain curvature, which is adapted to mate with the first hook 1331 at the proximal end of the connector 1320 of the adjustment assembly 1300, thereby docking the second adjustment rod 2400 with the adjustment assembly 1300. When the end of the second adjustment rod 2400 is received in the hollow hole 2201, the adapted portion is also received in the hollow hole 2201. The hollow hole 2201 limits the adapted portion between the distal end of the second adjustment rod 2400 and the proximal end of the connector 1320, thereby connecting the second adjustment rod 2400 with the connector 1320, that is, connecting the adjustment assembly 1300 of the implant 1000 with the delivery device 2000. After the first adjustment rod 2200 is retracted relative to the second adjustment rod 2400, the distal end of the second adjustment rod 2400 extends out of the hollow hole 2201. The fitting between the distal end of the second adjustment rod 2400 and the proximal end of the connector 1320 is no longer restricted by the hollow hole 2201. The second hook 2401 extends out of the hollow hole 2201 and separates from the first hook 1331. The second adjustment rod 2400 is separated from the connector 1320, and the connecting assembly 2800 is separated from the implant 1000. The second adjustment rod 2400 is made of metal, such as SUS304 stainless steel.

[0085] See Figure 29 and Figure 30The first adjustment rod 2200 includes an outer tube 2220 and an inner rod 2210 inserted into the outer tube 2220. The outer tube 2220 is connected to the tube body assembly 2900 and inserted into the through hole 2111 of the connecting sleeve 2100 to guide the movement of the inner rod 2210. By controlling the proximal movement of the outer tube 2220, the motion torque of the outer tube 2220 can be transmitted to the distal end of the inner rod 2210. A hollow hole 2201 is provided in the inner rod 2210. This allows the second adjustment rod 2400 to be plugged into and mate with the inner rod 2210. A stop pin 2212 is provided at the distal end of the first adjustment rod 2200 for removable connection with the fixing slot 1202 of the ejection member 1200. The stop pin 2212 slides into or out of the fixing slot 1202 to secure or release the first adjustment rod 2200 from the ejection member 1200. Specifically, two limiting pins 2212 are axially symmetrically provided on the outer peripheral side wall of the distal end portion of the inner rod 2210 of the first adjusting rod 2200. Each limiting pin 2212 cooperates with the fixing groove 1202 on one side of the ejector 1200 to achieve the function of locking and releasing the ejector 1200 and the connecting sleeve 2100. Figure 31 and Figure 32 As shown, when the limit pin 2212 is hung on the fixed groove 1202 of the ejecting member 1200, the ejecting member 1200 and the connecting sleeve 2100 are locked, limiting the axial movement of the ejecting member 1200 along the connecting sleeve 2100. By rotating the outer tube 2220, the inner rod 2210 can be driven to rotate, so that the limit pin 2212 rotates out of the fixed groove 1202, that is, the first adjusting rod 2200 and the ejecting member 1200 are disengaged, and the ejecting member 1200 can now move axially along the connecting sleeve 2100. The outer tube 2220 and the inner rod 2210 are preferably made of metal material, such as SUS304 material, and the outer tube 2220 and the inner rod 2210 are preferably connected by laser welding. Figure 33 As shown, the outer tube 2220 can be an endoscope tube body, such as a snake-bone tube or other metal tube body with certain support and bendability.

[0086] See also Figure 2 、 Figure 3 、 Figure 34 and Figure 35In this embodiment, the tube body assembly 2900 of the conveying device 2000 includes a hollow conveying sheath 3100, an inner tube 3200 installed in the conveying sheath 3100, two first steel cable cores 3300 symmetrically installed in the conveying sheath 3100 and roughly parallel to the inner tube 3200, and a second steel cable core 3400 installed in the inner tube 3200, wherein the conveying sheath 3100 is a polymer tube body with a certain axial length, or a metal-polymer multilayer composite tube body; the inner tube 3200 is a flexible metal tube; the first steel cable core 3300 and the second steel cable core 3400 are both steel cables made of three strands of metal wire. As previously described, the distal ends of the two first steel cable cores 3300 are fixedly connected to the proximal ends of the two core shafts 2300, preferably by laser welding. This connection allows the first steel cable cores 3300 to be manipulated outside the patient's body, driving the core shafts 2300 and the chuck 1100 to perform corresponding movements. The distal end of the second steel cable core 3400 is fixedly connected to the proximal end of the second adjustment rod 2400. The delivery sheath 3100 is connected to one end of the connecting sleeve 2100, preferably by laser welding. This allows the movement of the second steel cable cores 3400 to drive the movement of the second adjustment rod 2400, thereby controlling the docking of the second adjustment rod 2400 with the adjustment assembly 1300. The outer tube 2220 of the first adjustment rod 2200 is inserted into the inner tube 3200, driving the inner tube 3200 to rotate and retract, thereby driving the rotation and retraction of the first adjustment rod 2200.

[0087] See also Figure 34 、 Figure 35 、 Figure 36 and Figure 37 The artificial tendon regulation system 9000 also includes a driving device 4000, which is connected to the core shaft 2300, the first adjustment rod 2200 and the second adjustment rod 2400 through the conveying device 2000, so as to drive the chuck 1100 to hook the artificial tendon, drive the pushing member 1200 to push the artificial tendon and separate it from the first adjustment rod 2200, and drive the connecting member 1320 of the adjustment assembly 1300 to drive the elastic member 1310 to engage in the card slot 1101 and then separate from the second adjustment rod 2400.

[0088] It is understood that to facilitate in vitro remote operation of the drive device 4000, the delivery sheath 3100, inner tube 3200, first steel cable core 3300, and second steel cable core 3400 are all flexible tubes with a certain degree of support strength. This allows the connection assembly 2800 and the implant 1000 to remain relatively fixed to the drive device 4000, facilitating the drive device 4000 to manipulate the implant 1000 through the tube assembly 2900 to hook the artificial tendon 01. The inner tube 3200 can transmit the rotational torque of the drive device 4000 to the inner rod 2210 of the first adjustment rod 2200, causing the limit pin 2212 to rotate into the fixed groove 1202, thereby unlocking the ejection member 1200 from the connecting sleeve 2100 and facilitating separation of the ejection member 1200 from the connecting sleeve 2100. The inner tube 3200 also transmits the retracting force of the driving device 4000 to the inner rod 2210 of the first adjustment rod 2200, causing the second adjustment rod 2400 to extend from the inner rod 2210, thereby separating the second hook 2401 of the second adjustment rod 2400 from the first hook 1331 of the adjustment assembly 1300, thereby disengaging the implant 1000 from the connecting assembly 2800. The first steel cable core 3300 transmits the rotational torque and telescopic torque of the driving device 4000 to the core shaft 2300, enabling the core shaft 2300 to clamp the chuck 1100 relative to the ejector 1200 and to rotate and thread the core shaft 2300 to or separate from the chuck 1100. The second steel cable core 3400 transmits the retaining force of the driving device 4000 to the second adjustment rod 2400, allowing the second adjustment rod 2400 to extend relative to the first adjustment rod 2200.

[0089] In this embodiment, the driving device 4000 includes a handle 4900. The handle 4900 is provided with a connecting tube 4100. The connecting tube 4100 is connected to the delivery sheath 3100, and the interior of the connecting tube 4100 is connected to the interior of the delivery sheath 3100, so that the inner tube 3200, the first steel cable core 3300, and the second steel cable core 3400 all pass through the connecting tube 4100. The handle 4900 is also provided with a clamping knob 4200 on the end near the connecting tube 4100. The clamping knob 4200 is rotatable relative to the connecting tube 4100. The rotational torque of the clamping knob 4200 relative to the handle 4900 is transmitted to the chuck 1100 and the ejection member 1200 via the delivery device 2000, and is converted into a linear torque that causes the chuck 1100 to open and close relative to the ejection member 1200. The drive device 4000 further includes a slider 4800 slidably connected to the handle 4900. As the clamping knob 4200 rotates relative to the handle 4900, the slider 4800 slides synchronously with the chuck 1100 relative to the handle 4900. The slider 4800 includes two branch rods 4810 extending symmetrically from the handle 4900. The ends of the two branch rods 4810 are each provided with two first release knobs 4300. The first release knobs 4300 are connected to the first steel cable core 3300. Rotating the first release knobs 4300 causes the first steel cable core 3300 to rotate relative to the handle 4900, thereby causing the core shaft 2300 to rotate relative to the connecting sleeve 2100. The two first release knobs 4300 are axially fixed to the same slider 4800. The slider 4800 is threadedly connected to the clamping knob 4200, so that rotation of the clamping knob 4200 relative to the handle 4900 drives the slider 4800 to slide axially relative to the handle 4900. The slider 4800, through the first release knob 4300, drives the first steel cable core 3300 to slide axially relative to the handle 4900, thereby driving the core shaft 2300 to extend and retract axially relative to the connecting sleeve 2100. Rotating the knob 4200 controls the slider 4800 to move axially from the proximal end to the distal end, thereby simultaneously driving the first release knob 4300 to move axially. At this time, the first steel cable core 3300 connected to the first release knob 4300 drives the core shaft 2300 to move back and forth, thereby achieving the opening and closing of the chuck 1100 and the ejector 1200. By rotating the first release knob 4300 , the core shaft 2300 connected to the first steel cable core 3300 and the chuck 1100 threadedly connected thereto can be released.

[0090] The drive device 4000 is provided with a second release knob 4500 at the end of the handle 4900 away from the clamping knob 4200. The second release knob 4500 is fixedly connected to the flexible inner tube 3200. Rotating the second release knob 4500 relative to the handle 4900 drives the outer tube 2220 of the first adjustment rod 2200 to rotate via the inner tube 3200, causing the stop pin 2212 to slide into or out of the fixing slot 1202, thereby securing or releasing the ejector 1200 from the connecting sleeve 2100. The second release knob 4500 and the inner tube 3200 can be mechanically connected or adhesively bonded. Alternatively, rotating the knob 4500 counterclockwise drives the outer tube 2220 and inner rod 2210 to rotate. When the stop pin 2212 of the inner rod 2210 moves out of the fixing slot 1202 of the ejector 1200, the ejector 1200 can be released.

[0091] Furthermore, the drive device 4000 is provided with a sliding button 4440, which limits the rotation of the second release knob 4500 relative to the handle 4900. The sliding button 4440 is slidably connected to the end of the handle 4900 near the second release knob 4500. The sliding button 4440 is provided with a stopper 4401, and the second release knob 4500 is provided with a retaining groove 4501 that cooperates with the stopper 4401. By pushing the sliding button 4440 toward the second release knob 4500, the stopper 4401 enters the retaining groove 4501, thereby limiting the rotation of the knob 4500 relative to the handle 4900. By pushing the sliding torque 4400 away from the end of the second release knob 4500, the stopper 4401 is withdrawn from the retaining groove 4501, thereby unlocking the knob 4500. Of course, in other embodiments, a button may be provided on the handle 4900. Pressing the button into the second release knob 4500 limits the rotation of the second release knob 4500 relative to the handle 4900. Pressing the button out of the second release knob 4500 unlocks the second release knob 4500 relative to the handle 4900.

[0092] In this embodiment, Figure 34 、 Figure 38 and Figure 39The drive device 4000 also includes a fixing block 4700 fixedly connected to the second steel cable core 3400, and a third release knob 4600 that can drive the fixing block 4700 to slide axially along the handle 4900. The third release knob 4600 rotates relative to the handle 4900, driving the adjustment assembly 1300 to secure or separate from the conveying device 2000 through the conveying device 2000. The fixing block 4700 is connected to the second steel cable core 3400, thereby driving the second adjustment rod 2400 to move axially along the connecting sleeve 2100. The fixing block 4700 and the second steel cable core 3400 can be mechanically connected or adhesively bonded. The third release knob 4600 is threadedly connected to the second release knob 4500, allowing relative movement between the third release knob 4600 and the second release knob 4500. Optionally, rotating the third release knob 4600 counterclockwise can push the fixed block 4700 to move toward the handle 4900. Due to the relative limiting relationship between the inner rod 2210 of the first adjusting rod 2200 and the adjusting member 1300, the relative distance between the fixed block 4700 and the second release knob 4500 is in a tight state, which limits the relative movement of the fixed block 4700 and the second release knob 4500, that is, the second steel cable core 3400 and the flexible inner tube 3200 are relatively fixed, ensuring that the second adjusting rod 2400 cannot retreat relative to the first adjusting rod 22002400, thereby avoiding accidental release of the connecting member 1320.

[0093] It is understood that the second release knob 4500 can also slide relative to the handle 4900. The sliding of the second release knob 4500 relative to the handle 4900 drives the adjustment assembly 1300 to move to a defined position of the chuck 1100 and the ejection member 1200 via the delivery device 2000. When the second release knob 4500 and the fixed block 4700 are relatively fixed, the second release knob 4500 can be retracted away from the handle 4900 to drive the fixed block 4700 to retract, thereby retracting the adjustment assembly 1300 until the telescopic portion 1313 of the elastic member 1310 engages with the retaining groove 1101 of the chuck 1100, thereby securing the ejection member 1200 and the chuck 1100 together to fix the length of the artificial tendon 01.

[0094] Optionally, the third release knob 4600 can be rotated clockwise to be in a mutually movable state, thereby unlocking the relative movement between the second steel cable core 3400 and the inner tube 3200. By withdrawing the second release knob 4500 away from the handle 4900, the second release knob 4500 is moved closer to the fixed block 4700, thereby driving the inner rod 2210 of the first adjustment rod 2200 to withdraw until the curvature fit between the first adjustment rod 22002400 and the first hook 1331 of the connector 1320 fails, thereby achieving the release of the second adjustment rod 2400 from the adjustment assembly 1300.

[0095] See also Figure 34 and Figure 37 During interventional chordal manipulation surgery using the Artificial Chordal Manipulation System 9000, perform chordal manipulation 01 according to the following steps:

[0096] First, through an interventional approach, the distal end of the artificial chord regulation system 9000 is delivered into the patient's body through a small incision in the patient via a puncture guidewire (not shown) and an adjustable curved sheath (not shown), and the implant 1000 is delivered to a predetermined treatment site, which in this embodiment refers to entering the left ventricle until below the leaflets of the mitral valve.

[0097] Then, by operating the clamping knob 4200 of the driving device 4000, the rotational torque of the clamping knob 4200 relative to the handle 4900 is converted into the sliding torque of the sliding member 4800 relative to the handle 4900, and then the sliding member 4800 is used to drive the first steel cable core 3300 to move, and the first steel cable core 3300 drives the chuck 1100 to open relative to the ejection member 1200 fixed to the connecting sleeve 2100 through the core shaft 2300; after the chuck 1100 is opened to a certain distance relative to the ejection member 1200, the artificial tendon 01 is allowed to enter between the chuck 1100 and the ejection member 1200, and the hook groove 1108 of the chuck 1100 is controlled to hook the artificial tendon 01.

[0098] Then, see Figure 34 、 Figures 40 to 44 After the chuck 1100 hooks the artificial tendon 01, the clamping knob 4200 is rotated in the opposite direction, so that the clamping knob 4200 drives the chuck 1100 and the push-out member 1200 to close through the sliding member 4800, the first steel cable core 3300 and the core shaft 2300. The amount of closing of the chuck 1100 can be controlled by controlling the number of turns of the clamping knob 4200, that is, the amount of extension of the artificial tendon 01 into the chuck 1100 can be adjusted.

[0099] Then, the degree of mitral valve regurgitation is observed by ultrasound or other medical imaging until the mitral valve regurgitation disappears or is at its mildest state. The third release knob 4600 is rotated to tighten the fixing member relative to the second release knob 4500, that is, the inner tube 3200 and the second steel cable core 3400 are relatively fixed, and then the first adjustment rod 2200 and the second adjustment rod 2400 are relatively fixed. The second release knob 4500, the third release knob 4600 and the fixing member are controlled to retreat as a whole away from the handle 4900, so that the second adjustment rod 2400 drives the telescopic portion 1313 of the elastic member 1310 to extend out of the through slot 1201 through the structure in which the second hook 2401 engages with the first hook 1331, and the telescopic portion 1313 is engaged with the chuck 1100. 1101, at this time, the depth of the ejecting member 1200 entering the chuck 1100 is the smallest, so that the amount of control of the artificial tendon 01 by the chuck 1100 and the ejecting member 1200 is minimized; after the telescopic portion 1313 is clamped into the first-stage slot 1101, the clamping knob 4200 is rotated to make the chuck 1100 and the ejecting member 1200 continue to close, which can increase the control amount of the artificial tendon 01 in the chuck 1100; when the ejecting member 1200 drives the telescopic portion 1313 of the elastic member 1310 to cooperate with the last-stage slot 1101 of the chuck 1100, the depth of the ejecting member 1200 extending into the chuck 1100 is the largest, that is, the amount of control of the artificial tendon 01 by the chuck 1100 and the ejecting member 1200 reaches the maximum.

[0100] Then, see Figure 34 、 Figure 45 、 Figure 46 and Figure 47 After determining the closed position of the chuck 1100 and the ejection member 1200, the third release knob 4600 is rotated so that the third release knob 4600 moves away from the second release knob 4500, and the third release knob 4600 and the second release knob 4500 can move relative to each other; that is, after the third release and the second release knob 4500 are unlocked, the second release knob 4500 is rotated again, and the second release knob 4500 is used to drive the outer tube 2220 and the inner rod 2210 to rotate through the inner tube 3200, so that the limit pin 2212 of the inner rod 2210 rotates out of the fixing groove 1202, thereby realizing the separation and release of the inner rod 2210 of the first adjusting rod 2200 from the ejection member 1200.

[0101] Then, rotate the first release knob 4300, and use the first release knob 4300 to drive the first steel cable core 3300 to rotate, and then drive the core shaft 2300 to rotate, so that the end of the core shaft 2300 is released from the threaded hole 1103 of the chuck 1100, and finally the chuck 1100 and the ejector 1200 are separated from the conveying device 2000.

[0102] Then, the third release knob 4600 is rotated to the bottom to unlock the relative movement between the second steel cable core 3400 and the inner tube 3200, and the second release knob 4500 is withdrawn away from the handle 4900, thereby driving the inner rod 2210 to withdraw until the curvature fit between the second hook 2401 and the first hook 1331 fails, thereby completing the release of the second adjustment rod 2400 from the connector 1320, that is, completing the release of the implant 1000 from the connector assembly 2800;

[0103] Finally, the delivery device 2000 is withdrawn from the patient's body, thus completing the regulation of the artificial tendon 01.

[0104] It can be understood that the artificial chord regulation system 9000 of the present invention can also be implanted into the patient's body through transapical or surgical means, using the clamp 1100 to hook the artificial chords and other sutures implanted in the patient's body, and then the artificial chords and other sutures are pushed into the clamp 1100 through the push piece 1200, and then the suture length is adjusted and fixed by the adjustment component 1300. In this usage scenario, the artificial chord regulation system of the present invention may only include the implant 1000.

[0105] In summary, although the present application has been disclosed as above with a preferred embodiment, the preferred embodiment is not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims.

Claims

1. An artificial chordal control system, characterized in that: The implant comprises an implant for accommodating the artificial chordae tendineae, the implant comprising a chuck, a push piece disposed in the chuck, and an adjustment assembly connected to the proximal end of the push piece, the chuck being provided with a plurality of slots, the chuck being openable and closable relative to the push piece to hook the artificial chordae tendineae, the push piece being movable axially toward the distal end in the chuck, the distal end surface of the push piece pushing the artificial chordae tendineae hooked by the chuck, thereby increasing the length of the artificial chordae tendineae accommodated in the chuck; The adjustment assembly includes an elastic member, which can be axially moved relative to the ejection member under the action of an external force, so that the elastic member is switched from a compressed state in which it is completely accommodated in the ejection member to an extended state in which it partially extends out of the ejection member and is engaged in the engaging groove, thereby fixing the position of the ejection member in the chuck.

2. The artificial chordal control system according to claim 1, characterized in that: The chuck is provided with a receiving hole, which extends from the proximal end to the distal end of the chuck. The ejecting member is pushed into the receiving hole from the proximal end of the chuck.

3. The artificial chordal control system according to claim 2, characterized in that: The clamp is provided with a hook groove which is connected to the accommodating hole and passes through the outer peripheral side wall of the clamp.

4. The artificial chordal control system according to claim 2, characterized in that: The inner wall of the accommodating hole is provided with a plurality of card slots arranged along the depth direction, the ejecting member is provided with a receiving groove along the axial direction, the outer wall of the ejecting member is provided with a through groove connected to the receiving groove, the adjusting assembly is accommodated in the receiving groove, and a portion of the elastic member extends from the through groove and is engaged with the card slot.

5. The artificial chordal control system according to claim 4, characterized in that: The adjustment assembly also includes a connecting piece, and the elastic piece includes a stabilizing portion connected to the connecting piece, a curved portion connected to the stabilizing portion, and a telescopic portion that expands and contracts as the curved portion bends and deforms. The end of the telescopic portion away from the curved portion extends from the through slot and is clamped into the clamping slot.

6. The artificial chord regulation system according to claim 1, characterized in that: The distal end of the ejection member is provided with an arc-shaped concave surface, and the concave surface abuts against the artificial tendon cord.

7. The artificial chord regulation system according to any one of claims 1 to 6, characterized in that: The artificial tendon regulation system also includes a delivery device for delivering the implant, the delivery device includes a connecting sleeve and a core shaft movably inserted into the connecting sleeve, and the distal end of the core shaft is detachably connected to the proximal end of the chuck.

8. The artificial chordal control system according to claim 7, characterized in that: The conveying device is further provided with a first adjusting rod extending out of the connecting sleeve and detachably connected to the ejecting member, and a second adjusting rod extending out of the connecting sleeve and docking with the adjusting assembly, wherein the second adjusting rod is movably inserted into the first adjusting rod.

9. The artificial chordal control system according to claim 8, characterized in that: A limit pin is provided at the distal end of the first adjusting rod, and the ejecting member is further provided with a fixing slot. The limit pin slides into or out of the fixing slot to fix or release the first adjusting rod and the ejecting member.

10. The artificial chordal control system according to claim 8, characterized in that: The proximal end of the adjustment component is provided with a first hook, and the distal end of the second adjustment rod is provided with a second hook. The first hook and the second hook respectively have a certain curvature and are adapted to each other so that the second adjustment rod is docked with the adjustment component.

11. The artificial chord regulation system according to claim 10, characterized in that: The inner wall of the first adjusting rod limits the fitting position of the first hook and the second hook to limit the separation of the adjusting component from the second adjusting rod.

12. The artificial chordal control system according to claim 8, characterized in that: The delivery device also includes a hollow delivery sheath and an inner tube installed in the delivery sheath. The first adjustment rod is installed in the inner tube. The inner tube drives the first adjustment rod to move to fix or release the first adjustment rod and the push piece.

13. The artificial chordal control system according to claim 12, characterized in that: The delivery device also includes two first steel cable cores symmetrically installed in the delivery sheath and roughly parallel to the inner tube. The two first steel cable cores are respectively connected to the proximal ends of the two core shafts to drive the core shafts and the chuck to move.

14. The artificial chord regulation system according to claim 12, characterized in that: The conveying device further includes a second steel cable core inserted into the inner tube, wherein the second steel cable core is connected to the proximal end of the second adjusting rod to control the docking of the second adjusting rod with the adjusting assembly.

15. The artificial chordal control system according to claim 8, characterized in that: The artificial tendon regulation system also includes a driving device, which is respectively connected to the core shaft, the first adjustment rod and the second adjustment rod to drive the chuck to hook the artificial tendon, drive the push piece to push the artificial tendon and separate it from the first adjustment rod, and drive the adjustment assembly to engage in the slot and separate it from the second adjustment rod.

16. The artificial chord regulation system according to claim 15, characterized in that: The driving device includes a handle and a clamping knob rotatable relative to the handle. The rotational torque of the clamping knob relative to the handle is transmitted to the chuck and the ejection member via the transmission device and converted into a linear torque for opening and closing the chuck relative to the ejection member.

17. The artificial chord regulation system according to claim 16, characterized in that: The driving device is further provided with a sliding member slidably connected to the handle. The sliding member slides relative to the handle synchronously with the clamping head as the clamping knob rotates relative to the handle.

18. The artificial chord regulation system according to claim 17, characterized in that: The driving device is further provided with a first release knob which can rotate relative to the sliding member. The rotation of the first release knob relative to the sliding member drives the clamp to be fixed or separated relative to the conveying device via the conveying device.

19. The artificial chordal control system according to claim 18, characterized in that: The driving device is further provided with a second release knob rotatable relative to the handle. The rotation of the second release knob relative to the handle drives the ejecting member to be stabilized or separated relative to the conveying device via the conveying device.

20. The artificial chord regulation system according to claim 19, characterized in that: The driving device is further provided with a sliding button, which limits the second release knob to rotate relative to the handle.

21. The artificial chordal control system according to claim 20, characterized in that: The second release knob can also slide relative to the handle. The sliding of the second release knob relative to the handle drives the adjustment assembly to move to a position where the clamp and the ejector are defined via the conveying device.

22. The artificial chordal control system according to claim 21, characterized in that: The driving device is further provided with a third release knob which can rotate relative to the handle. The third release knob rotates relative to the handle to drive the adjustment component to be fixed or separated from the conveying device through the conveying device.

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