Left atrial appendage clip and its clip head assembly

Abstract

This invention relates to the field of left atrial appendage occluder technology and discloses a left atrial appendage occluder and its clamping assembly, comprising: an end cylinder; a rhomboid four-bar linkage capable of clamping and opening, disposed at the end of the end cylinder; and an elastic sleeve pre-set in a first configuration, detachably mounted on the rhomboid four-bar linkage, capable of changing from the first configuration to a second configuration as the rhomboid four-bar linkage opens, or returning from the second configuration to the first configuration as the rhomboid four-bar linkage clamps. This left atrial appendage occluder, through the deformation of the elastic sleeve driven by the rhomboid four-bar linkage, can precisely adapt to the shape of the left atrial appendage, significantly reducing the device size and facilitating operation in confined spaces, while also effectively avoiding the occlusion failure problem caused by the pushing of the left atrial appendage by traditional occluders.

Description

Technical Field

[0001] This invention relates to the field of left atrial appendage clamping device technology, specifically to a left atrial appendage clamping device and its clamping head assembly. Background Technology

[0002] The left atrial appendage is part of the atrium and is closely related to various cardiovascular diseases, such as thrombosis caused by atrial fibrillation. To reduce thromboembolic events, left atrial appendage clipping is commonly used clinically. By clipping the left atrial appendage, blood flow is prevented, thereby reducing the risk of thrombosis. Currently, left atrial appendage clippers are generally used to clamp the left atrial appendage.

[0003] Common left atrial appendage clamps generally come in two end shapes: rectangular and clip-shaped. The rectangular type (see patent CN114129220A) is larger, making it difficult to operate within the confined space of the atrium. It can easily compress or interfere with other tissues, resulting in insufficient operational flexibility and affecting surgical outcomes. While the clip-type clamp (see patent US20110112569A1) is smaller and more flexible, it can easily generate excessive lateral force on the left atrial appendage during clamping, causing compression or displacement and ultimately leading to clamping failure. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a left atrial appendage clamp and its clamp assembly, which has the advantages of small size and reliable clamping.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned objectives of small size and reliable clamping, the present invention provides the following technical solution: a chuck assembly, comprising:

[0008] End cap;

[0009] A diamond-shaped four-bar linkage that can clamp and open is located at the end of the end tube;

[0010] The elastic sleeve, which is preset to the first form, can be detachably mounted on the rhomboid four-bar linkage. It can change from the first form to the second form as the rhomboid four-bar linkage opens, or return from the second form to the first form as the rhomboid four-bar linkage clamps.

[0011] As a preferred embodiment of the present invention, the rhomboid four-bar linkage consists of an upper connecting rod, an upper driven rod, a lower driven rod, and a lower connecting rod.

[0012] As a preferred embodiment of the present invention, a fixed shaft is fixedly installed inside the end of the end cylinder, and a first gear and a second gear are rotatably installed on the fixed shaft. An upper connecting rod is fixedly installed on the first gear, and an upper driven rod is hinged to the other end of the upper connecting rod. A lower driven rod is hinged to the other end of the upper driven rod, and a lower connecting rod is hinged to the other end of the lower driven rod. The other end of the lower connecting rod is fixedly installed on the second gear.

[0013] As a preferred embodiment of the present invention, each of the upper connecting rod, upper driven rod, lower driven rod and lower connecting rod is equipped with a column, and the elastic sleeve is provided with four positioning slots for inserting the columns.

[0014] As a preferred embodiment of the present invention, a baffle plate is fixedly installed at the end of the column, and the diameter of the baffle plate is larger than the diameter of the column.

[0015] As a preferred embodiment of the present invention, the front surfaces of the upper connecting rod, the upper driven rod, the lower driven rod, and the lower connecting rod are leveled by a pad, and the column is fixedly installed on the pad.

[0016] As a preferred embodiment of the present invention, the top of the first gear is engaged with an upper rack, and the bottom of the second gear is engaged with a lower rack. Both the upper rack and the lower rack are fixedly mounted on a movable plate, and the movable plate is movably disposed inside the end cylinder.

[0017] As a preferred embodiment of the present invention, a pull rod is fixedly installed on the side of the movable plate facing away from the fixed shaft, and the end of the pull rod passes through the fixed plate fixed inside the end cylinder and is fixedly connected to a traction plate.

[0018] A support spring is also fitted onto the pull rod, and the support spring is fixedly installed between the moving plate and the fixed plate.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a left atrial appendage clamp device, which has the following beneficial effects:

[0021] 1. This left atrial appendage clamp uses a diamond-shaped four-bar linkage to drive the elastic sleeve to deform, which can accurately adapt to the shape of the left atrial appendage. This significantly reduces the size of the device, making it easy to operate in narrow spaces, and also effectively avoids the clamping failure problem caused by traditional clamps pushing the left atrial appendage.

[0022] 2. This left atrial appendage clamping device has an elastic sleeve that can evenly distribute clamping force during the clamping process, forming a reliable and gentle clamping of the left atrial appendage, reducing intraoperative tissue damage and improving clamping stability.

[0023] 3. The left atrial appendage clamp has an elastic sleeve that can quickly detach from the diamond-shaped four-bar linkage after recovering its deformation and clamping the left atrial appendage, further improving the ease of operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a front view of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the deformation of the elastic jacket of the present invention;

[0027] Figure 4 This is an enlarged schematic diagram of the positioning groove portion of the present invention;

[0028] Figure 5 This is a cross-sectional view of the end tube portion of the present invention. Figure 1 ;

[0029] Figure 6 This is a cross-sectional view of the end tube portion of the present invention. Figure 2 ;

[0030] Figure 7 This is a cross-sectional view of the handle portion of the present invention.

[0031] In the diagram: 1. End cylinder; 2. Fixed shaft; 3. First gear; 4. Upper connecting rod; 5. Second gear; 6. Lower connecting rod; 7. Upper driven rod; 8. Lower driven rod; 9. Upper rack; 10. Lower rack; 11. Moving plate; 12. Pull rod; 13. Fixed plate; 14. Traction plate; 15. Support spring; 16. Limiting rod; 17. Pad; 18. Column; 19. Baffle; 20. Elastic sleeve; 21. Positioning groove; 22. Handle; 23. Inner rod; 24. Clamp; 25. Entry groove; 26. Inner stop groove. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1:

[0034] Please see Figures 1-6 A chuck assembly includes an end sleeve 1, such as Figure 1As shown, a diamond-shaped four-bar linkage that can be clamped and opened is provided at the end of the end cylinder 1. Specifically, the diamond-shaped four-bar linkage consists of an upper linkage 4, an upper driven linkage 7, a lower driven linkage 8, and a lower linkage 6.

[0035] like Figure 5 and Figure 6 As shown, a fixed shaft 2 is fixedly installed inside the end of the end cylinder 1. A first gear 3 and a second gear 5 are rotatably installed on the fixed shaft 2. An upper connecting rod 4 is fixedly installed on the first gear 3. An upper driven rod 7 is hinged to the other end of the upper connecting rod 4. A lower driven rod 8 is hinged to the other end of the upper driven rod 7. A lower connecting rod 6 is hinged to the other end of the lower driven rod 8. The other end of the lower connecting rod 6 is fixedly installed on the second gear 5. In addition, an upper rack 9 meshes with the top of the first gear 3, and a lower rack 10 meshes with the bottom of the second gear 5. Both the upper rack 9 and the lower rack 10 are fixedly installed on a movable plate 11. The movable plate 11 is movably arranged inside the end cylinder 1 and can move left and right.

[0036] When the moving plate 11 moves to the right, it drives the upper rack 9 and the lower rack 10 to move to the right. The upper rack 9 and the lower rack 10 moving to the right drive the first gear 3 and the second gear 5 to rotate, which in turn enables the upper connecting rod 4 and the lower connecting rod 6 to gradually open. At this time, the entire rhomboid four-bar linkage also gradually opens.

[0037] Conversely, when the moving plate 11 moves to the left, it can gradually clamp the upper link 4 and the lower link 6, and thus gradually clamp the entire rhomboid four-bar linkage.

[0038] In this embodiment, as Figure 5 As shown, a pull rod 12 is fixedly installed on the side of the movable plate 11 facing away from the fixed shaft 2. The end of the pull rod 12 passes through the fixed plate 13 fixed in the end cylinder 1 and is fixedly connected to the traction plate 14. In addition, a support spring 15 is also sleeved on the pull rod 12. The support spring 15 is fixedly installed between the movable plate 11 and the fixed plate 13.

[0039] Supported by the support spring 15, the moving plate 11 is initially in the left position, and the rhomboid four-bar linkage is in a clamped state. When the traction plate 14 is pulled to move, the moving plate 11 is also driven to move through the pull rod 12. At this time, the support spring 15 is compressed, and the rhomboid four-bar linkage gradually changes from the clamped state to the open state. Thus, in this invention, by pulling the traction plate 14, the change of the rhomboid four-bar linkage from the clamped state to the open state can be controlled.

[0040] To ensure the stability of the movement of the traction plate 14, in this embodiment, a limiting rod 16 is also fixedly installed on the traction plate 14, and the limiting rod 16 is movably inserted into the fixed plate 13.

[0041] In this invention, an elastic sleeve 20 is detachably mounted on the rhomboid four-bar linkage, such as... Figure 3As shown, the elastic sleeve 20 is "shuttle-shaped" when closed, which is defined as the first form, and is elliptical when open, which is defined as the second form. The elastic sleeve 20 can change from the first form to the second form as the rhomboid four-bar linkage opens, or return from the second form to the first form as the rhomboid four-bar linkage clamps.

[0042] In practical applications, the diamond-shaped four-bar linkage in the clamped state and the elastic clip 20 in the first form are all "rod-shaped," small in size, and particularly suitable for operation in narrow spaces. After reaching the left atrial appendage through the incision or laparoscopic surgical channel, the diamond-shaped four-bar linkage is opened, and the elastic clip 20 is in the second form. Then, the elastic clip 20 is nested in the left atrial appendage. After the position is confirmed, the diamond-shaped four-bar linkage is clamped, and the elastic clip 20 returns to the first form. At this time, the left atrial appendage can be clamped by the elastic clip 20 in the first form. During the clamping process, the elastic clip 20 can evenly distribute the clamping force, forming a reliable and gentle clamping of the left atrial appendage, reducing intraoperative tissue damage and improving the stability of the clamping.

[0043] In this invention, the elastic sleeve 20 is detachable from the rhomboid four-bar linkage; specifically, as shown... Figure 2 and Figure 4 As shown, each of the upper connecting rod 4, upper driven rod 7, lower driven rod 8, and lower connecting rod 6 is equipped with a column 18. The elastic sleeve 20 has four evenly spaced positioning slots 21 for inserting the columns 18. By inserting the four columns 18 into the four positioning slots 21, the elastic sleeve 20 can be loaded onto the rhomboid four-link. When the rhomboid four-link is spread out, it has an inward contraction force. This contraction force acts on the columns 18, thereby effectively ensuring the stability of the loading and preventing the elastic sleeve 20 from falling off.

[0044] like Figure 1 As shown, the front surfaces of the upper connecting rod 4, the upper driven rod 7, the lower driven rod 8, and the lower connecting rod 6 are all leveled by the pad 17, and the column 18 is fixedly installed on the pad 17, thereby further ensuring the stability of the elastic sleeve 20 under load.

[0045] When the rhomboid four-bar linkage is in the open state and the elastic sleeve 20 is in the second form, it is convenient to nest it at the left atrial appendage; when the rhomboid four-bar linkage is in the clamped state and the elastic sleeve 20 is in the first form, it is convenient to load and remove the elastic sleeve 20 from the rhomboid four-bar linkage.

[0046] Specifically, during removal, first separate the rhomboid four-bar linkage and the elastic sleeve 20, then control the rhomboid four-bar linkage to open, and it can be removed from the left atrial appendage.

[0047] In this embodiment, to prevent the elastic sleeve 20 from detaching from the diamond-shaped four-bar linkage, such as Figure 4As shown, an elastic baffle 19 is also fixedly installed at the end of the column 18, and the diameter of the elastic baffle 19 is larger than the diameter of the column 18. By blocking the baffle 19, the positioning groove 21 can be prevented from detaching from the column 18. The two can only be separated when a lateral force is applied.

[0048] Preferably, during the insertion process, the elastic sleeve 20 is slightly stretched to further prevent it from falling off by utilizing its own contraction force.

[0049] Example 2:

[0050] Please see Figure 7 Based on Embodiment 1, this embodiment provides a left atrial appendage clamp, which includes a clamp assembly, a handle 22 connected to the clamp assembly, and an inner rod 23 movably disposed within the handle 22. The clamp assembly is the clamp assembly described in Embodiment 1, and the inner rod 23 is connected to the traction plate 14. The specific driving method for the movement of the inner rod 23 within the handle 22 can be directly referred to and applied to clamps in the prior art, and will not be described in detail in this embodiment.

[0051] In this embodiment, the end cylinder 1 and the handle 22 are magnetically connected, making it easy to disassemble and replace chuck assemblies of different specifications.

[0052] like Figure 7 The end of the inner rod 23 is bent vertically to form a locking head 24. The inside of the traction plate 14 has an inner stop groove 26. The side wall of the inner stop groove 26 has an entry groove 25 for the locking head 24 to enter. When the end tube 1 is connected to the handle 22, the locking head 24 enters from the entry groove 25, and after slightly rotating, it is blocked by the inner stop groove 26 to prevent it from coming out. When the inner rod 23 moves, it can pull the traction plate 14 to move. Through the magnetic design, it can be ensured that the end tube 1 can still rotate after it is connected to the handle 22.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chuck assembly, characterized in that, include: End tube (1); A diamond-shaped four-bar linkage that can clamp and open is located at the end of the end tube (1); The elastic sleeve (20) is pre-set in the first form "shuttle shape" and can be detachably mounted on the rhomboid four-bar linkage. It can change from the first form "shuttle shape" to the second form "ellipse shape" as the rhomboid four-bar linkage opens, or return from the second form "ellipse shape" to the first form "shuttle shape" as the rhomboid four-bar linkage clamps. The elastic sleeve (20) is an integral piece. The rhomboid four-bar linkage consists of an upper link (4), an upper driven link (7), a lower driven link (8), and a lower link (6); The upper connecting rod (4), the upper driven rod (7), the lower driven rod (8) and the lower connecting rod (6) are all equipped with columns (18), and the elastic sleeve (20) is evenly provided with four positioning slots (21) for inserting the columns (18). A baffle (19) is fixedly installed at the end of the column (18), and the diameter of the baffle (19) is larger than the diameter of the column (18). The front sides of the upper connecting rod (4), upper driven rod (7), lower driven rod (8) and lower connecting rod (6) are leveled by a pad (17), and the column (18) is fixedly installed on the pad (17).

2. The chuck assembly according to claim 1, characterized in that: A fixed shaft (2) is fixedly installed inside the end of the end cylinder (1). A first gear (3) and a second gear (5) are rotatably installed on the fixed shaft (2). An upper connecting rod (4) is fixedly installed on the first gear (3). An upper driven rod (7) is hinged to the other end of the upper connecting rod (4). A lower driven rod (8) is hinged to the other end of the upper driven rod (7). A lower connecting rod (6) is hinged to the other end of the lower driven rod (8). The other end of the lower connecting rod (6) is fixedly installed on the second gear (5).

3. The chuck assembly according to claim 2, characterized in that: The top of the first gear (3) is engaged with an upper rack (9), and the bottom of the second gear (5) is engaged with a lower rack (10). The upper rack (9) and the lower rack (10) are both fixedly mounted on a movable plate (11), which is movably disposed inside the end cylinder (1).

4. The chuck assembly according to claim 3, characterized in that: A pull rod (12) is fixedly installed on the side of the movable plate (11) facing away from the fixed shaft (2). The end of the pull rod (12) passes through the fixed plate (13) fixed in the end cylinder (1) and is fixedly connected to the traction plate (14). A support spring (15) is also sleeved on the pull rod (12), and the support spring (15) is fixedly disposed between the moving plate (11) and the fixed plate (13).

5. A left atrial appendage clamp, comprising a clamp assembly, a handle (22) connected to the clamp assembly, and an inner rod (23) movably disposed within the handle (22), characterized in that, The clamp assembly is the clamp assembly according to any one of claims 1-4, and the inner rod (23) is connected to the traction plate (14).

6. The left atrial appendage clamp according to claim 5, characterized in that: The end tube (1) and the handle (22) are magnetically connected; The end of the inner rod (23) is bent vertically to form a chuck (24), and an inner groove (26) is formed inside the traction plate (14). An entry groove (25) is provided on the side wall of the inner groove (26) for the chuck (24) to enter.

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