Delivery device and valve clamping system

Abstract

The present application relates to the technical field of medical devices, and discloses a delivery device and a valve clamping system. The delivery device is used for delivering a valve clamping device, and the delivery device comprises a delivery sheath and a control member. The delivery sheath comprises a connecting end and a control end. The control member comprises a control rod, a control handle and a claw hook. The control rod is movably arranged in the delivery sheath. The control handle is connected to one end of the control rod and extends out of the control end of the delivery sheath. The claw hook is connected to the other end of the control rod and extends out of the connecting end of the delivery sheath. The claw hook is used for connecting a proximal clamping piece. The control handle is used for controlling the opening and closing of the claw hook and driving the control rod and the claw hook to move so as to fold or unfold the proximal clamping piece relative to a fixed seat. The delivery device and the valve clamping system provided by the present application can be used in valve repair surgery and can solve the technical problems of easy breakage and inconvenient disassembly of the delivery device in the existing valve repair surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a delivery device and a valve clamping system. Background Technology

[0002] Mitral regurgitation is one of the most common valvular diseases today. The main causes include mitral annular dilatation, chordae tendineae insufficiency, mitral myxomatosis, leaflet prolapse, rheumatic valvular heart disease, and ischemic lesions. Open-heart mitral valve repair and artificial valve replacement are the most effective treatments for mitral regurgitation. However, because these surgeries require cardiopulmonary bypass, they are quite invasive and carry a high risk of complications and mortality, especially in elderly patients and those with multiple comorbidities.

[0003] In recent years, medical professionals and researchers worldwide have explored transcatheter mitral valve repair techniques. The main interventional treatments include annulusoplasty, negative pressure aspiration suture, and mitral valve clipping, with mitral valve clipping being the most reliable. Mitral valve clipping involves inserting an implantable valve clip via transseptal puncture to the vicinity of the mitral valve, clamping and fixing the free edges of the anterior and posterior leaflets to ensure good leaflet apposition at end-systole and reduce regurgitation. Traditional valve clipping systems control the opening and closing of the clips with sutures. Sutures offer good flexibility, making it easy to adjust the clip opening angle. However, sutures pose a significant risk of breakage during use, resulting in low reliability, and they are difficult to remove from the clips after clipping. Summary of the Invention

[0004] The purpose of this invention is to provide a delivery device and a valve clamping system that can solve the technical problems of easy breakage and inconvenient disassembly and assembly of delivery devices in existing valve repair surgeries.

[0005] In a first aspect, the present invention provides a conveying device for conveying a valve clamp, the valve clamp including a fixing base and a proximal clamp, the proximal clamp being disposed on the fixing base and retractable or expandable relative to the fixing base, the conveying device comprising:

[0006] Delivery sheath, including connecting end and control end;

[0007] The control element includes a control lever, a control handle, and a claw hook. The control lever is movably inserted into the delivery sheath. The control handle is connected to one end of the control lever and extends from the control end of the delivery sheath. The claw hook is connected to the other end of the control lever and extends from the connection end of the delivery sheath. The claw hook is used to connect to the proximal clamp. The control handle is used to control the opening and closing of the claw hook, and to move the control lever and the claw hook to retract or expand the proximal clamp relative to the fixed base.

[0008] In one embodiment, the control lever includes a hollow tube and a connecting rod movably inserted inside the hollow tube. The claw includes two opposing claws. One end of the connecting rod is connected to the control handle, and the other end is connected to the claws. The control handle is used to pull the connecting rod to move axially along the hollow tube.

[0009] The connecting rod moves toward the control end of the delivery sheath, which allows the two claws to engage and lock together to form a fixing ring. The size of the fixing ring is larger than the size of the hollow tube along the radial direction of the hollow tube. The fixing ring can be held onto the hollow tube and at least partially extends out of the hollow tube. The connecting rod moves toward the connecting end of the delivery sheath, which allows the two claws to separate and unlock.

[0010] In one embodiment, the conveying device includes two sets of control elements, and the conveying sheath includes two sets of conveying cavities extending axially and being centrally symmetrical, with the two sets of control elements movably disposed within the two sets of conveying cavities respectively.

[0011] In one embodiment, the connecting end of the delivery sheath is further provided with a fixing plate, and the fixing plate is provided with a positioning hole that communicates with the delivery cavity and is used for the control rod to pass through.

[0012] In one embodiment, the control handle extends from the wall of the control end of the delivery sheath.

[0013] In one embodiment, the length of the hollow tube is greater than the length of the connecting rod.

[0014] In one embodiment, the claw hook is made of stainless steel.

[0015] In one embodiment, the connecting rod is made of titanium alloy.

[0016] In one embodiment, the hollow tube is a metal thiopan tube.

[0017] The delivery device provided by this invention includes a delivery sheath and a control component. The control component includes a control handle, a claw hook connected to the proximal clip of the valve clip, and a control rod for connecting the control handle and the claw hook. Using the control handle, the control rod and the claw hook can be moved, thereby causing the proximal clip connected to the claw hook to retract or expand relative to the fixing seat, realizing the delivery and fixation of the valve clip. The control rod is located inside the delivery sheath, preventing it from being squeezed by human tissue. When the control rod is moved by the control handle, the frictional resistance is low, making the control rod easy to move and less likely to damage human tissue. Furthermore, the control rod has high strength, is not easily broken during use, and has high reliability. Further, the control component is firmly connected to the proximal clip via the claw hook. Simultaneously, the control component can control the opening and closing of the claw hook. The claw hook and the proximal clip are easy to assemble and disassemble. After the valve clip is installed in place, the connection between the claw hook and the proximal clip can be quickly disconnected and the device removed, simplifying the operation. Using the above delivery device to deliver and adjust the valve clip can effectively shorten the operation time and improve the success rate.

[0018] In a second aspect, the present invention provides a valve clamping system, including a valve clamp and a delivery device as described in the first aspect.

[0019] In the valve clamping system provided in this embodiment, the delivery device includes a delivery sheath and a control component. The control component includes a control handle, a claw hook connected to the proximal clip of the valve clamp, and a control rod for connecting the control handle and the claw hook. Using the control handle, the control rod and the claw hook can be moved, thereby causing the proximal clip connected to the claw hook to retract or expand relative to the fixing seat, realizing the delivery and fixation of the valve clamp. The control rod is located inside the delivery sheath, preventing it from being squeezed by human tissue. When the control rod is moved by the control handle, the frictional resistance is low, making the control rod easy to move and less likely to damage human tissue. Furthermore, the control rod has high strength, is not easily broken during use, and has high reliability. Further, the control component is firmly connected to the proximal clip via the claw hook. Simultaneously, the control component can control the opening and closing of the claw hook. The claw hook and proximal clip are easy to assemble and disassemble. After the valve clamp is installed in place, the connection between the claw hook and the proximal clip can be quickly disconnected and the device removed, making operation simple. Using the aforementioned delivery device to deliver and adjust the valve clamp can effectively shorten the operation time and improve the success rate of the operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the valve clamping system provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 One of the schematic diagrams showing the delivery device connected to the valve clamp;

[0023] Figure 3 for Figure 1 The second schematic diagram shows the delivery device connected to the valve clamp.

[0024] Figure 4 Book Figure 1 The second schematic diagram shows the delivery device connected to the valve clamp.

[0025] Figure 5 for Figure 2 A schematic diagram of the proximal clip of the valve clamp shown in the figure;

[0026] Figure 6 for Figure 2 One of the structural schematic diagrams of the control components of the conveying device shown in the figure;

[0027] Figure 7 for Figure 2 A second schematic diagram of the control components of the conveying device shown in the diagram;

[0028] Figure 8 for Figure 2 The third schematic diagram of the control components of the conveying device shown;

[0029] Figure 9 for Figure 2 The fourth schematic diagram of the control components of the conveying device shown;

[0030] Figure 10 for Figure 2 A schematic diagram of the structure of the fixed plate of the conveying device shown.

[0031] Explanation of key component symbols:

[0032] 100. Valve clamping system;

[0033] 1. Conveying device; 11. Conveying sheath; 12. Control component; 121. Control lever; 1211. Hollow tube; 1212. Connecting rod; 122. Control handle; 123. Claw hook; 1231. Claw clamp; 14. Fixing plate; 141. Positioning hole; 142. Mounting hole;

[0034] 2. Valve clamp; 21. Fixation base; 22. Proximal clip; 221. Connecting hole; 23. Distal clip. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for descriptive convenience only, not indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the patent. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0037] In a first aspect, the present invention provides a valve clip delivery device for delivering the valve clip into a patient and controlling the proximal clip of the valve clip to retract or expand relative to its fixation seat to fix the valve clip in a target position.

[0038] Reference Figure 1-4 The delivery device 1 provided in this embodiment includes a delivery sheath 11 and a control component 12. The delivery sheath 11 includes a connecting end and a control end, wherein the connecting end is the end away from the operator and used to connect to the valve clamp 2, and the control end is the end closer to the operator and away from the valve clamp 2. Figure 1 , Figure 2 and Figure 3 As shown, the control component 12 includes a control lever 121, a control handle 122, and a claw hook 123. The control lever 121 is movably inserted into the delivery sheath 11 and can move within the delivery sheath 11 along its extension direction. Figure 1 , Figure 4 and Figure 6As shown, the control handle 122 is connected to one end of the control lever 121 and extends from the control end of the delivery sheath 11. The claw hook 123 is connected to the other end of the control lever 121 and extends from the connecting end of the delivery sheath 11. The claw hook 123 is used to connect the proximal clamp 22, and the control lever 121 is used to connect the claw hook 123 and the control handle 122. The control handle 122 is used to control the opening and closing of the claw hook 123, and to move the control lever 121 and the claw hook 123 to cause the proximal clamp 22 to retract or expand relative to the fixing seat 21. Specifically, when the claw hook 123 is connected to the valve clamp 2, as... Figure 1 and Figure 3 As shown, by using the control handle 122 to move the control lever 121 and the claw hook 123 toward the control end near the delivery sheath 11, the proximal clamp 22 can be retracted relative to the fixed seat 21; as Figure 1 and Figure 2 As shown, by using the control handle 122 to move the control lever 121 and the claw hook 123 toward the control end away from the delivery sheath 11, the proximal clamp 22 can be unfolded relative to the fixed seat 21.

[0039] It should be noted that the aforementioned delivery device 1 is used to deliver and fix the valve clamp 2. After the valve clamp 2 is fixed at the target position, the delivery device 1 needs to be removed from the valve clamp 2 and taken out of the body. Figure 2 and Figure 5 As shown, the free end of the proximal clip 22 of the conventional valve clamp 2 has a connection hole 221, and the claw 123 can be connected to the connection hole 221 after closing. In addition, the control rod 121 is a flexible rod. During the process of controlling the proximal clip 22 to retract or expand using the control element 12, the control rod 121 can deform to a certain extent in accordance with the deformation and rotation angle of the proximal clip 22 to prevent the delivery sheath 11 and delivery device 1 from swinging. In addition, the valve clamp 2 also includes a distal clip 23. The proximal clip 22 and the distal clip 23 are used together to form a clamp for holding the valve leaflets. The distal clip 23 and other structures are not directly connected to the delivery device 1, and will not be described in detail here.

[0040] The delivery device 1 provided by the present invention includes a delivery sheath 11 and a control component 12. The control component 12 includes a control handle 122, a claw hook 123 connected to the proximal clamp 22 of the valve clamp 2, and a control rod 121 for connecting the control handle 122 and the claw hook 123. Using the control handle 122, the control rod 121 and the claw hook 123 can be moved, thereby causing the proximal clamp 22 connected to the claw hook 123 to retract or expand relative to the fixing seat 21, realizing the delivery and fixation of the valve clamp 2. The control rod 121 is disposed inside the delivery sheath 11, thus avoiding compression by human tissue. When the control rod 121 is moved by the control handle 122, the frictional resistance is low, making the movement of the control rod 121 convenient and less likely to damage human tissue. Furthermore, the control rod 121 has high strength, is not easily broken during use, and has high reliability. Furthermore, the control element 12 is securely connected to the proximal clip 22 via the claw hook 123. Simultaneously, the control element 12 allows for the opening and closing of the claw hook 123. The claw hook 123 and the proximal clip 22 are easily assembled and disassembled. After the valve clamp 2 is in place, the connection between the claw hook 123 and the proximal clip 22 can be quickly disconnected, and the valve clamp 2 can be removed from the delivery device 1, making the operation relatively simple. Using the aforementioned delivery device 1 to deliver and adjust the valve clamp 2 can effectively shorten the operation time and improve the success rate of the operation.

[0041] It is understandable that after the valve clamp 2 is installed, the delivery device 1 needs to be removed from the body. In order to reduce the damage to human tissue caused by friction during the removal and placement of the delivery device 1, the outer wall surface of the delivery sheath 11 should be kept smooth.

[0042] In one embodiment, such as Figure 2 , Figure 7 and Figure 9 As shown, the control lever 121 includes a hollow tube 1211 and a connecting rod 1212 movably inserted within the hollow tube 1211. The claw hook 123 includes two opposing claws 1231. One end of the connecting rod 1212 is connected to the control handle 122, and the other end is connected to the claws 1231. The control handle 122 is used to pull the connecting rod 1212 to move axially along the hollow tube 1211. The claw hook 123 is made of a material with shape memory function, such as... Figure 4 and Figure 9 As shown, when the claw hook 123 is in its natural state, the ends of the two claw clamps 1231 away from the connecting rod 1212 separate, forming an installation gap. Figure 2 , Figure 6 and Figure 8As shown, the connecting rod 1212 moves toward the control end of the conveying sheath 11, and the jaw clamp 1231 abuts against the inner wall of the hollow tube 1211, so that the two jaw clamps 1231 can engage and lock together to form a fixing ring. Along the radial direction of the hollow tube 1211, the size of the fixing ring is larger than the diameter of the hollow tube 1211, and the fixing ring can be held on the hollow tube 1211 and at least partially extends out of the hollow tube 1211; as Figure 4 , Figure 7 and Figure 9 As shown, the connecting rod 1212 moves toward the connecting end of the delivery sheath 11, and the claw clamp 1231 separates from the inner wall of the hollow tube 1211, thereby restoring the two claw clamps 1231 to their natural state and achieving separation and unlocking. Wherein, as... Figure 2 , Figure 5 and Figure 8 As shown, when the two jaw clamps 1231 are locked, they form a retaining ring, and the jaw hooks 123 are closed. The jaw hooks 123 can be fixedly connected to the connecting hole 221 of the proximal clamping piece 22; as Figure 4 , Figure 5 and Figure 9 As shown, when the two grippers 1231 are separated and unlocked, the claw hook 123 opens. The claw hook 123 can be installed on or removed from the connection hole 221 of the proximal clamp 22. With the above design, the claw hook 123 can be opened and closed by operating the handle 122 and the control lever 121. The structure is simple and easy to use.

[0043] It is understood that in some embodiments, the two claws 1231 can be fixedly connected to one end of the hollow tube 1211, and a sleeve that can be fitted over the claws 1231 can be connected to the connecting rod 1212. The locking and unlocking of the claws 1231 can be achieved by moving the connecting rod 1212 and the sleeve. The specific design can be made according to the actual situation and is not limited here.

[0044] In one embodiment, the delivery sheath 11 is a multi-lumen tube, and the delivery sheath 11 includes multiple sets of delivery lumens. Optionally, as... Figure 2 As shown, the delivery device 1 includes two sets of control components 12, and the delivery sheath 11 includes two sets of delivery chambers extending along its axial direction. The two sets of control components 12 are movably disposed within the two sets of delivery chambers. A conventional valve clamp 2 includes two sets of proximal clips 22, each set of proximal clips 22 being connected to one set of control components 12. The two sets of control components 12 can independently control the two sets of proximal clips 22. With this design, each set of control components 12 is independently disposed within a delivery chamber, ensuring high independence. When adjusting the opening and closing of the proximal clips 22 using the control components 12, there will be no crossover or mutual interference between the multiple sets of control components 12. The delivery device 1 is less prone to damage and facilitates precise adjustment of the opening and closing angle of the proximal clips 22, resulting in high reliability.

[0045] Optionally, the two sets of delivery chambers are symmetrically arranged in the delivery sheath 11. In this way, when the proximal clamp 22 is adjusted by the control element 12, the radial force on the delivery sheath 11 is uniform, which helps the delivery sheath 11 to maintain balance. This can effectively prevent the delivery sheath 11 and the delivery device 1 from swinging, thereby reducing the harm to the patient during the operation.

[0046] Furthermore, such as Figure 2 and Figure 10 As shown, the connecting end of the delivery sheath 11 is also provided with a fixing plate 14. The fixing plate 14 has a positioning hole 141 that communicates with the delivery cavity and is used for the control rod 121 to pass through. With the above structure, the position of the control rod 121 can be better positioned. When the opening and closing of the proximal clamp 22 is adjusted by the control member 12, there will be no crossover or mutual interference between the multiple control members 12, which can further improve the accuracy of the position adjustment of the proximal clamp 22.

[0047] It should be noted that, as Figure 2 and Figure 10 As shown, the delivery sheath 11 is also provided with a receiving cavity, and the fixing plate 14 is provided with a mounting hole 142 that communicates with the receiving cavity. The receiving cavity is used to install the locking structure or other connecting structure of the valve clamp 2.

[0048] In one embodiment, such as Figure 1 and Figure 7 As shown, the control handle 122 extends from the wall of the control end of the delivery sheath 11. The delivery sheath 11 has a large installation space on its wall, which facilitates the installation of the control handle 122, and the control handle 122 is convenient to use as it is mounted on the wall.

[0049] It is understood that in some embodiments, the control handle 122 may also be installed at the end of the delivery sheath 11. The specific design may be made according to the actual situation and is not limited here.

[0050] In one embodiment, the claw 123 is made of stainless steel. Stainless steel has advantages such as high strength, good corrosion resistance, good weldability and smooth surface. The claw 1231 made of stainless steel has high strength and good elasticity. It is not easy to break or be damaged during use and is easy to clean. It can be used repeatedly and has high practicality and reliability.

[0051] It is understood that, in some embodiments, provided that the installation and strength requirements are met, the claw hook 123 may also be made of cobalt alloy, titanium alloy or other metal materials. The specific design can be made according to the actual situation and is not limited here.

[0052] In one embodiment, the connecting rod 1212 is made of nickel-titanium alloy. Nickel-titanium alloy has advantages such as low density, non-magnetic, non-toxic, and high strength. The connecting rod 1212 made of nickel-titanium alloy is strong, lightweight, not easily deformed or damaged during use, and easy to pull, making it convenient to use.

[0053] It is understood that, in some embodiments, provided that the usage and strength requirements are met, the connecting rod 1212 may also be made of materials such as stainless steel, titanium alloy, resin or plastic. The specific design can be made according to the actual situation and is not limited here.

[0054] In one embodiment, the hollow tube 1211 is a metal thiohide tube. Metal thiohide tubes have advantages such as high flexibility, strong torsional resistance, and good anti-shrinkage performance. When in use, the metal thiohide tube can deform to a certain extent in accordance with the deformation and rotation angle of the proximal clamp 22, and can resist the compression of human tissue, thereby ensuring the normal use of the connecting rod 1212 and the claw hook 123, with high reliability.

[0055] It is understood that, in some embodiments, provided that the usage requirements and strength requirements are met, the hollow tube 1211 may also be a composite tube with a braided mesh. The specific design can be made according to the actual situation and is not limited here.

[0056] In one embodiment, the length of the hollow tube 1211 is greater than the length of the connecting rod 1212. This design is structurally sound, and during adjustment, the connecting rod 1212 always moves within the hollow tube 1211, making it less prone to damage.

[0057] It is understood that in some embodiments, for ease of operation or assembly, the length of the connecting rod 1212 may be greater than or equal to the length of the hollow tube 1211. The specific design can be made according to the actual situation and is not limited here.

[0058] The delivery device 1 provided by this invention is used for valve repair surgery, including but not limited to mitral valve repair and tricuspid valve repair. The following description uses mitral valve repair as an example. The specific method of using the delivery device 1 provided by this invention is as follows: First, the claw hook 123, in its natural, open state, is installed on the proximal clip 22 of the valve clamp 2. The control handle 122 is pulled, causing the connecting rod 1212 and the claw clip 1231 to move towards the control end, closing and locking the two claw clips 1231 onto the proximal clip 22, thus achieving a fixed connection between the delivery device 1 and the valve clamp 2. Then, the valve clamp 2 is delivered to the mitral valve location in the patient's body using the delivery device 1. After the valve clamp 2 reaches the target position, the control handle 122 is pulled, causing the control rod 121 and the claw hook 123 to move towards or away from the control end. The valve clamp 2 is clamped onto the mitral valve leaflet by moving back and forth on one side. Then, the control handle 122 is pulled, which moves the control rod 121 and the claw 123 toward the side closer to the control end until the proximal clamp 22 closes relative to the fixed seat 21, so that the valve clamp 2 is fully retracted. Then, the control handle 122 is pulled, which moves the connecting rod 1212 and the claw 1231 toward the side away from the control end and separates the two claws 1231. The control handle 122 is pulled again, which moves the control rod 121 and the claw 123 toward the side closer to the control end and separates the claw 123 from the proximal clamp 22. Then, the delivery device 1 is removed and the valve clamp 2 is left in the patient's body.

[0059] Secondly, referring to Figure 1-10 The present invention also provides a valve clamping system 100, including a valve clamp 2 and a delivery device 1. For example... Figure 1 , Figure 2 and Figure 5 As shown, the valve clamp 2 includes a base 21, a proximal clip 22, and a distal clip 23. The proximal clip 22 is rotatably connected to the base 21, and its free end has a connection hole 221. The delivery sheath 11 includes a connecting end and a control end. The connecting end is the end away from the operator and used to connect the valve clamp 2, while the control end is the end closer to the operator and away from the valve clamp 2. Figure 1 , Figure 2 and Figure 3 As shown, the control component 12 includes a control lever 121, a control handle 122, and a claw hook 123. The control lever 121 is movably inserted into the delivery sheath 11 and can move within the delivery sheath 11 along its extension direction. Figure 1 , Figure 4 and Figure 6As shown, the control handle 122 is connected to one end of the control lever 121 and extends from the control end of the delivery sheath 11. The claw hook 123 is connected to the other end of the control lever 121 and extends from the connection end of the delivery sheath 11. The claw hook 123 is used to connect the proximal clamp 22, and the control lever 121 is used to connect the claw hook 123 and the control handle 122. The control handle 122 is used to control the opening and closing of the claw hook 123, and to move the control lever 121 and the claw hook 123 to cause the proximal clamp 22 to retract or expand relative to the fixing seat 21. Specifically, when the claw hook 123 is connected to the valve clamp 2, as... Figure 1 and Figure 3 As shown, by using the control handle 122 to move the control lever 121 and the claw hook 123 toward the control end near the delivery sheath 11, the proximal clamp 22 can be retracted relative to the fixed seat 21; as Figure 1 and Figure 2 As shown, by using the control handle 122 to drive the control lever 121 and the claw hook 123 to move toward the control end away from the delivery sheath 11, the proximal clamp 22 can be unfolded relative to the fixed seat 21.

[0060] In the valve clamping system 100 provided in this embodiment, the delivery device 1 includes a delivery sheath 11 and a control component 12. The control component 12 includes a control handle 122, a claw hook 123 connected to the proximal clamp 22 of the valve clamp 2, and a control rod 121 for connecting the control handle 122 and the claw hook 123. Using the control handle 122, the control rod 121 and the claw hook 123 can be moved, thereby causing the proximal clamp 22 connected to the claw hook 123 to retract or expand relative to the fixing seat 21, realizing the delivery and fixation of the valve clamp 2. Among them, the control rod 121 is set inside the delivery sheath 11, which can avoid being squeezed by human tissue. When the control rod 121 is moved by the control handle 122, the frictional resistance is small, the control rod 121 is easy to move and is not likely to damage human tissue. In addition, the control rod 121 has high strength, is not easy to break during use, and has high reliability. Furthermore, the control element 12 is securely connected to the proximal clip 22 via the claw hook 123. Simultaneously, the control element 12 allows for the opening and closing of the claw hook 123. The claw hook 123 and the proximal clip 22 are easily assembled and disassembled. After the valve clamp 2 is in place, the connection between the claw hook 123 and the proximal clip 22 can be quickly disconnected, and the valve clamp 2 can be removed from the delivery device 1, making the operation relatively simple. Using the aforementioned delivery device 1 to deliver and adjust the valve clamp 2 can effectively shorten the operation time and improve the success rate of the operation.

[0061] like Figure 2 and Figure 5As shown, the proximal clip 22 of the valve clamp 2 provided in this embodiment has a connecting hole 221, which can be hooked onto a hook, fixing ring, or other structure. The proximal clip 22 is made of an elastic material, such as nickel-titanium, stainless steel, or polymer. Optionally, the proximal clip 22 is made of nickel-titanium.

[0062] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A delivery device for delivering a valve clamp, the valve clamp comprising a base and a proximal clamp disposed on the base, characterized in that, The conveying device includes: Delivery sheath, including connecting end and control end; The control element includes a control lever, a control handle, and a claw hook. The control lever is movably inserted into the delivery sheath. The control handle is connected to one end of the control lever and extends from the control end of the delivery sheath. The claw hook is connected to the other end of the control lever and extends from the connection end of the delivery sheath. The claw hook is used to connect to the proximal clamp. The control handle is used to control the opening and closing of the claw hook, and to move the control lever and the claw hook to retract or expand the proximal clamp relative to the fixed base. The control lever includes a hollow tube and a connecting rod that is movably inserted inside the hollow tube. The claw hook includes two opposing claws. One end of the connecting rod is connected to the control handle and the other end is connected to the claws. The control handle is used to pull the connecting rod to move along the axial direction of the hollow tube. The connecting rod moves toward the control end of the delivery sheath, which allows the two claws to engage and lock together to form a fixing ring. The size of the fixing ring is larger than the size of the hollow tube along the radial direction of the hollow tube. The fixing ring can be held onto the hollow tube and at least partially extends out of the hollow tube. The connecting rod moves toward the connecting end of the delivery sheath, which allows the two claws to separate and unlock.

2. The conveying device according to claim 1, characterized in that, The conveying device includes two sets of control components, and the conveying sheath includes two sets of conveying cavities that extend along its axial direction and are centrally symmetrical. The two sets of control components are respectively movably disposed within the two sets of conveying cavities.

3. The conveying device according to claim 2, characterized in that, The connecting end of the delivery sheath is also provided with a fixing plate, and the fixing plate is provided with a positioning hole that communicates with the delivery cavity and is used for the control rod to pass through.

4. The conveying device according to claim 2 or 3, characterized in that, The control handle extends from the wall of the control end of the delivery sheath.

5. The conveying device according to claim 2 or 3, characterized in that, The length of the hollow tube is greater than the length of the connecting rod.

6. The conveying device according to claim 2 or 3, characterized in that, The claw hook is made of stainless steel.

7. The conveying device according to claim 2 or 3, characterized in that, The connecting rod is made of titanium alloy.

8. The conveying device according to claim 2 or 3, characterized in that, The hollow tube is a metal thioh tube.

9. A valve clamping system, characterized in that, It includes a valve clamp and a delivery device as described in any one of claims 1-8.

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