Left auricle clipping device and chuck assembly thereof

Abstract

The invention relates to the technical field of left atrial appendage clipping devices, and discloses a left atrial appendage clipping device and a chuck assembly thereof. The rhombic four-bar linkage capable of being clamped and opened is arranged at the end part of the end cylinder; the elastic clamping sleeve is preset to be in a first form, is separably loaded on the rhombic four-bar linkage and can be changed from the first form to the second form along with opening of the rhombic four-bar linkage or recovered from the second form to the first form along with clamping of the rhombic four-bar linkage. According to the left atrial appendage clipping device, the elastic jacket is driven to deform through the rhombic four-bar linkage, the left atrial appendage clipping device can accurately adapt to the shape of a left atrial appendage, the equipment size is remarkably reduced, operation in a narrow space is easy, and meanwhile the problem that clipping fails due to the fact that a traditional clipping device pushes the left atrial appendage is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of left atrial appendage clip occluders, in particular to a left atrial appendage clip occluder and a clip assembly thereof. Background Art

[0002] The left atrial appendage is a part of the atrium and is closely related to a variety of cardiovascular diseases (such as thrombosis caused by atrial fibrillation). In order to reduce thromboembolic events, left atrial appendage clamping is usually used clinically to clamp the left atrial appendage to prevent blood from entering, thereby reducing the risk of thrombosis. In the prior art, a left atrial appendage clamp is generally used to clamp the left atrial appendage.

[0003] Common left atrial appendage occluders generally have two end shapes: rectangular head type and clip type. The rectangular head type (refer to patent CN114129220A) is larger in size and not easy to operate in the narrow atrial space. It is easy to compress or interfere with other tissues, and the operation flexibility is insufficient, which affects the surgical effect. Although the clip type occluder (refer to patent US20110112569A1) has a smaller size and higher flexibility, it is easy to generate excessive lateral thrust on the left atrial appendage during the closure process, causing the left atrial appendage to be squeezed or displaced, which leads to closure failure. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a left atrial appendage occluder and a clamp assembly thereof, which have the advantages of small size and reliable clamping.

[0005] (II) Technical solution In order to achieve the above-mentioned purpose of small volume and reliable clamping, the present invention provides the following technical solution: a clamp assembly, comprising: End tube; A diamond-shaped four-bar linkage that can be clamped and opened is provided at the end of the end tube; The elastic jacket preset in the first form can be detachably loaded on the diamond four-bar linkage, and can change from the first form to the second form following the opening of the diamond four-bar linkage, or return from the second form to the first form following the clamping of the diamond four-bar linkage.

[0006] As a preferred technical solution of the present invention, the diamond four-bar linkage consists of an upper connecting rod, an upper driven rod, a lower driven rod and a lower connecting rod.

[0007] As a preferred technical solution of the present invention, a fixed shaft is fixedly installed inside the end of the end tube, 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, an upper follower rod is hinged on the other end of the upper connecting rod, a lower follower rod is hinged on the other end of the upper follower rod, a lower connecting rod is hinged on the other end of the lower follower rod, and the other end of the lower connecting rod is fixedly installed on the second gear.

[0008] As a preferred technical solution of the present invention, the upper connecting rod, the upper driven rod, the lower driven rod and the lower connecting rod are all equipped with columns, and the elastic jacket is evenly provided with four positioning grooves for inserting the columns.

[0009] As a preferred technical solution of the present invention, a baffle is fixedly installed at the end of the column, and the diameter of the baffle is larger than the diameter of the column.

[0010] As a preferred technical solution of the present invention, the front sides 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 mounted on the pad.

[0011] As a preferred technical solution of the present invention, the top of the first gear is meshed with an upper rack, and the bottom of the second gear is meshed with a lower rack. The upper rack and the lower rack are both fixedly mounted on a movable plate, and the movable plate is movably arranged in the end tube.

[0012] As a preferred technical solution 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 in the end tube and is fixedly connected to the traction plate; The pull rod is also sleeved with a support spring, and the support spring is fixedly arranged between the moving plate and the fixed plate.

[0013] (III) Beneficial effects Compared with the prior art, the present invention provides a left atrial appendage occluder, which has the following beneficial effects: 1. The left atrial appendage occluder drives the elastic sleeve to deform through the diamond-shaped four-bar linkage, which can accurately adapt to the shape of the left atrial appendage, significantly reducing the size of the device and making it easy to operate in a narrow space. At the same time, it also effectively avoids the problem of closure failure caused by the traditional occluder pushing the left atrial appendage.

[0014] 2. The elastic sleeve of the left atrial appendage occluder can evenly distribute the 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.

[0015] 3. The elastic jacket of the left atrial appendage occluder can be quickly detached from the diamond-shaped four-link after recovering its deformation and occluding the left atrial appendage, thereby further improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the deformation of the elastic jacket of the present invention; Figure 4 It is an enlarged schematic diagram of the positioning groove part of the present invention; Figure 5 The cross-sectional view of the end tube portion of the present invention Figure 1 ; Figure 6 The cross-sectional view of the end tube portion of the present invention Figure 2 ; Figure 7 It is a cross-sectional view of the handle portion of the present invention.

[0017] In the figure: 1. end tube; 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. movable plate; 12. pull rod; 13. fixed plate; 14. traction plate; 15. support spring; 16. limit 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 DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: See also Figure 1-Figure 6 , a chuck assembly, including a tip tube 1, such as Figure 1 As shown, a diamond-shaped four-bar linkage that can be clamped and opened is provided at the end of the end tube 1. Specifically, the diamond-shaped four-bar linkage is composed of an upper connecting rod 4, an upper driven rod 7, a lower driven rod 8 and a lower connecting rod 6; like Figure 5 and Figure 6As shown, a fixed shaft 2 is fixedly installed in the end of the end tube 1, and 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. The other end of the upper connecting rod 4 is hinged with an upper driven rod 7, and the other end of the upper driven rod 7 is hinged with a lower driven rod 8. The other end of the lower driven rod 8 is hinged with a lower connecting rod 6, and the other end of the lower connecting rod 6 is fixedly installed on the second gear 5. In addition, an upper rack 9 is meshed at the top of the first gear 3, and a lower rack 10 is meshed at the bottom of the second gear 5. The upper rack 9 and the lower rack 10 are both fixedly installed on a moving plate 11, and the moving plate 11 is movably arranged in the end tube 1 and can move left and right. When the moving plate 11 moves rightward, the upper rack 9 and the lower rack 10 are driven to move rightward, and the upper rack 9 and the lower rack 10 are driven to move rightward to drive the first gear 3 and the second gear 5 to rotate, so that the upper connecting rod 4 and the lower connecting rod 6 can be gradually opened, and at this time the whole diamond four-bar linkage is gradually opened; On the contrary, when the moving plate 11 moves to the left, the upper connecting rod 4 and the lower connecting rod 6 can be gradually clamped, and then the entire diamond four-bar linkage can be gradually clamped.

[0020] In this embodiment, if 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, and the end of the pull rod 12 passes through the fixed plate 13 fixed in the end tube 1 and is fixedly connected to the traction plate 14. In addition, a support spring 15 is also sleeved on the pull rod 12, and the support spring 15 is fixedly arranged between the movable plate 11 and the fixed plate 13; With the support of the support spring 15, the movable plate 11 is initially in the left position, and the diamond four-bar linkage is in a clamped state; when the traction plate 14 is pulled to move, the movable plate 11 is also driven to move through the pull rod 12. At this time, the support spring 15 is compressed, and the diamond four-bar linkage gradually changes from a clamped state to an open state. Therefore, in the present invention, by pulling the traction plate 14, the diamond four-bar linkage can be controlled to change from a clamped state to an open state.

[0021] In order to ensure the stability of the movement of the traction plate 14 , in the present embodiment, a limiting rod 16 is fixedly mounted on the traction plate 14 , and the limiting rod 16 is movably inserted on the fixing plate 13 .

[0022] In the present invention, an elastic jacket 20 is detachably mounted on the rhombus four-link, such as Figure 3 As shown, the elastic jacket 20 is in a "shuttle shape" when closed, which is defined as the first form, and in an elliptical shape when opened, which is defined as the second form. The elastic jacket 20 can change from the first form to the second form following the opening of the diamond four-bar linkage, or return from the second form to the first form following the clamping of the diamond four-bar linkage; In actual applications, the diamond four-bar linkage and the first form of the elastic jacket 20 in a clamped state are overall "rod-shaped", small in size, and particularly suitable for operation in narrow spaces; after reaching the left atrial appendage through an incision or a laparoscopic surgical channel, the diamond four-bar linkage is controlled to open, the elastic jacket 20 is in the second form, and then the elastic jacket 20 is nested in the left atrial appendage; after the position is confirmed, the diamond four-bar linkage is controlled to clamp, and the elastic jacket 20 is restored to the first form. At this time, the left atrial appendage can be clamped by the elastic jacket 20 restored to the first form. The elastic jacket 20 can evenly distribute the clamping force during the clamping process, forming a reliable and gentle clamping of the left atrial appendage, reducing tissue damage during surgery and improving the stability of the clamping.

[0023] In the present invention, the elastic jacket 20 can be detached from the diamond four-bar linkage. Specifically, Figure 2 and Figure 4 As shown, the upper connecting rod 4, the upper driven rod 7, the lower driven rod 8 and the lower connecting rod 6 are all installed with columns 18, and four positioning grooves 21 for inserting the columns 18 are evenly opened on the elastic jacket 20. By inserting the four columns 18 into the four positioning grooves 21, the elastic jacket 20 can be loaded onto the diamond four-link. When the diamond four-link is stretched, it has an inward contraction force, and the contraction force acts on the columns 18, thereby effectively ensuring the stability of the loading and preventing the elastic jacket 20 from falling off.

[0024] 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 a pad 17, and the column 18 is fixedly mounted on the pad 17, thereby further ensuring the loading stability of the elastic jacket 20.

[0025] When the diamond-shaped four-bar linkage is in an open state and the elastic jacket 20 is in the second state, it is convenient to be nested at the left atrial appendage; when the diamond-shaped four-bar linkage is in a clamped state and the elastic jacket 20 is in the first state, it is convenient to load and remove the elastic jacket 20 on the diamond-shaped four-bar linkage; Specifically, when removing the device, the diamond-shaped four-bar linkage and the elastic jacket 20 are separated first, and then the diamond-shaped four-bar linkage is controlled to open, so that the device can be removed from the left atrial appendage.

[0026] In this embodiment, in order to prevent the elastic jacket 20 from falling off from the diamond-shaped four-bar linkage, Figure 4 As shown, an elastic baffle 19 is 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. The baffle 19 can prevent the positioning groove 21 from separating from the column 18, and the two can only be separated when lateral force is applied.

[0027] Preferably, during the insertion process, the elastic jacket 20 is slightly stretched open, and the elastic jacket 20 is further prevented from falling off by utilizing the contraction force of the elastic jacket 20 itself.

[0028] Embodiment 2: See also Figure 7 On the basis of the first embodiment, a left atrial appendage occluder is provided in the present embodiment, and the left atrial appendage occluder includes a chuck assembly, a handle 22 connected to the chuck assembly, and an inner rod 23 movably arranged in the handle 22, wherein the chuck assembly is the chuck assembly described in the first embodiment, and the inner rod 23 is connected to the traction plate 14. The specific driving method of the inner rod 23 moving in the handle 22 can directly refer to and apply the occluder in the prior art, and will not be repeated in the present embodiment.

[0029] In this embodiment, the end tube 1 and the handle 22 are connected by magnetic attraction, so that the chuck components of different specifications can be easily disassembled and replaced.

[0030] like Figure 7 The end of the inner rod 23 is bent vertically to form a clamping head 24, and an inner retaining groove 26 is formed inside the traction plate 14. The side wall of the inner retaining groove 26 is provided with an entry groove 25 for the clamping head 24 to enter. When the end tube 1 is connected to the handle 22, the clamping head 24 enters from the entry groove 25, and then after a slight rotation, it is blocked by the inner retaining groove 26 to prevent it from falling out. At this time, when the inner rod 23 moves, it can pull the traction plate 14 to move. Through the magnetic design, it can ensure that the end tube 1 can still rotate after being connected to the handle 22.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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 be clamped and opened is provided at the end of the end tube (1); The elastic jacket (20) is preset in a first form and is detachably loaded on the diamond four-bar linkage, and can change from the first form to the second form following the opening of the diamond four-bar linkage, or can return from the second form to the first form following the clamping of the diamond four-bar linkage.

2. The chuck assembly according to claim 1, characterized in that: The diamond four-bar linkage consists of an upper connecting rod (4), an upper driven rod (7), a lower driven rod (8) and a lower connecting rod (6).

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

4. The chuck assembly according to claim 2, characterized in that: The upper connecting rod (4), the upper driven rod (7), the lower driven rod (8) and the lower connecting rod (6) are all mounted with upright posts (18), and the elastic jacket (20) is evenly provided with four positioning grooves (21) for inserting the upright posts (18).

5. The chuck assembly according to claim 4, characterized in that: A baffle (19) is fixedly mounted on the end of the column (18), and the diameter of the baffle (19) is greater than the diameter of the column (18).

6. The chuck assembly according to claim 4 or 5, characterized in that: 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 leveled by a pad (17), and the upright column (18) is fixedly mounted on the pad (17).

7. The chuck assembly according to claim 3, characterized in that: An upper rack (9) is meshed at the top of the first gear (3), and a lower rack (10) is meshed at the bottom of the second gear (5); the upper rack (9) and the lower rack (10) are both fixedly mounted on a movable plate (11), and the movable plate (11) is movably arranged in the end tube (1).

8. The chuck assembly according to claim 7, characterized in that: A pull rod (12) is fixedly mounted on the side of the movable plate (11) facing away from the fixed shaft (2); the end of the pull rod (12) passes through a fixed plate (13) fixed in the end tube (1) and is fixedly connected to a traction plate (14); A support spring (15) is also sleeved on the pull rod (12), and the support spring (15) is fixedly arranged between the movable plate (11) and the fixed plate (13).

9. A left atrial appendage occluder, comprising a clamp assembly, a handle (22) connected to the clamp assembly, and an inner rod (23) movably disposed in the handle (22), characterized in that: The chuck assembly is the chuck assembly according to any one of claims 1 to 8, and the inner rod (23) is connected to the traction plate (14).

10. The left atrial appendage occluder according to claim 9, characterized in that: The end tube (1) and the handle (22) are connected to each other by magnetic attraction; The end of the inner rod (23) is bent vertically to form a clamping head (24), an inner retaining groove (26) is formed inside the traction plate (14), and a side wall of the inner retaining groove (26) is provided with an entry groove (25) for allowing the clamping head (24) to enter.

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