A left atrial appendage closure device

Abstract

The utility model relates to a left auricle of heart closing device belongs to medical instrument technical field, the utility model discloses through the cooperation of first push assembly and knob assembly drive first delivery pipe axial movement and rotation, through the second push assembly drive second delivery pipe axial movement, through the third push assembly drive controllable catheter axial movement, make the implant and lock ware can expose controllable catheter and retract to controllable catheter inside, through the cooperation of knob assembly, first push assembly, second push assembly and third push assembly, can accurately deliver and release implant and lock ware in the left auricle of heart closing operation process, and make left auricle of heart tissue be pulled and draw and be wound on the implant and be clamped between implant and lock ware, make the implant ware implant ware and lock ware not easy to fall off. The left auricle of heart closing device simple operation steps of the utility model, convenient for doctor operation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a left atrial appendage closure device. Background Technology

[0002] Atrial fibrillation (AF) is the most common sustained arrhythmia in clinical practice, with an incidence rate of 0.5%–1.3% in the general population. The greatest risk of AF lies in its potential to cause embolic events, such as acute ischemic stroke and acute myocardial infarction. In patients with non-valvular AF, over 90% of thrombi observed via transesophageal echocardiography (TEE) or autopsy series originate from the left atrial appendage (LAA). This finding has spurred the development of techniques to exclude the LAA, including internal vessel occlusion, surgical suturing, stapling, and resection, as non-pharmacological methods to reduce stroke risk. Surgical resection, stapling, suturing, or direct ligation of the atrial appendage involves major surgeries requiring opening the chest cavity and lengthy recovery times, carrying significant risks such as high trauma, low complete closure rates, and increased risks of infection and adverse anesthesia reactions. Furthermore, it is expensive and time-consuming. Thoracoscopic closure of the left atrial appendage for the prevention of AF embolism shows promising development prospects; however, given the current technological state, simply resecting or closing the left atrial appendage results in excessive surgical trauma and a high risk of complications. Therefore, transcatheter left atrial appendage occlusion (LAAO) has become an acceptable option for preventing atrial fibrillation-related stroke and systemic embolism in patients with increased bleeding risk.

[0003] However, existing left atrial appendage occlusion devices do not fit well and cannot completely cover the opening of the left atrial appendage, which can easily form residual cavities, leading to peripheral leakage (PDL) and increasing the risk of thrombosis. In addition, existing left atrial appendage occlusion devices also have the defect that the implant is prone to dislodgement.

[0004] Therefore, it is essential to design a left atrial appendage closure device that prevents the implant from falling out. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a left atrial appendage closure device that prevents implants from falling out.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A left atrial appendage closure device includes a tube assembly, an implanter, a locking device, a handle, a knob assembly, a first pushing assembly, a second pushing assembly, and a third pushing assembly, wherein... The tube assembly includes a first delivery tube, a second delivery tube, and a controllable conduit. The second delivery tube is sleeved on the first delivery tube, and the controllable conduit is sleeved on the second delivery tube. The handle includes a first housing, which is sleeved on the controllable conduit. The implanter is positioned at the end of the first delivery tube furthest from the handle; The locking device is movably connected to the implanter via a connecting shaft. The locking device is located between the implanter and the second delivery tube, and the locking device abuts against the end of the second delivery tube away from the handle. The knob assembly, the first push assembly, the second push assembly, and the third push assembly are respectively disposed on the handle; The knob assembly is connected to the first conveying tube, and the knob assembly is used to drive the first conveying tube to rotate. The first pushing component is connected to the first conveying pipe, and the first pushing component is used to drive the first conveying pipe to move along the axial direction of the first conveying pipe; The second pushing component is connected to the second conveying pipe, and the second pushing component is used to drive the second conveying pipe to move along the axial direction of the second conveying pipe; The third pushing component is connected to the controllable conduit, and the third pushing component is used to drive the controllable conduit to move along the axial direction of the controllable conduit.

[0007] Preferably, the knob assembly includes a first knob and a first knob connector, the first knob connector being connected to the first knob, both the first knob connector and the first knob being sleeved on the first delivery tube, and the first knob connector being housed within the first housing and rotatably engaged with the first housing.

[0008] More preferably, the first knob and the first conveying tube are engaged by a limiting groove and a limiting protrusion; the limiting groove is disposed on the outer wall of the first conveying tube and extends along the axial direction of the first conveying tube, the limiting protrusion corresponds to and is adapted to the limiting groove, one end of the limiting protrusion is accommodated in the limiting groove, and the other end of the limiting protrusion is disposed on the inner wall of the first knob.

[0009] More preferably, the number of the limiting grooves is not less than three and they are evenly distributed along the circumference of the first conveying pipe, and the limiting grooves form a spline structure on the outer wall of the first conveying pipe.

[0010] Preferably, the first pushing component includes a first slider, a first slide rod, and a first control block. A first slide groove is provided on the first housing. The first slider is located inside the first housing and connected to the first conveying pipe. One end of the first slide rod is connected to the first slider, and the other end of the first slide rod passes through the first slide groove and is connected to the first slider. The first slider is located outside the first housing and slides in cooperation with the first slide groove.

[0011] Preferably, the handle further includes a second housing, the second pushing component includes a second slider, a second slide rod and a second control block, the first housing is provided with a second slide groove, the second slider is located inside the second housing and connected to the second delivery pipe, one end of the second slide rod is connected to the second slider, the other end of the second slide rod passes through the second slide groove and is connected to the second slider, and the second slider is located outside the first housing and slides in cooperation with the second slide groove.

[0012] Preferably, the handle further includes a second housing, and the third pushing component includes a third slider, a third sliding rod, and a third control block. A third sliding groove is provided on the first housing. The third slider is located inside the second housing and is connected to the controllable conduit. One end of the third sliding rod is connected to the third slider, and the other end of the third sliding rod passes through the third sliding groove and is connected to the third slider. The third slider is located outside the first housing and slides in cooperation with the third sliding groove.

[0013] Preferably, the implanter includes an implanter connector, a connecting shaft, and a plurality of implantation claws arranged circumferentially along the implanter connector. The implanter connector is sleeved on the connecting shaft, and the connecting shaft is sleeved on the end of the first delivery tube away from the handle. The outer wall of the end of the first delivery tube away from the handle is provided with a first locking protrusion extending axially along the first delivery tube, and the inner wall of the connecting shaft is provided with a second locking protrusion extending axially along the connecting shaft. The first locking protrusion and the second locking protrusion are adapted to each other.

[0014] More preferably, a locking block is provided on the side of the first locking protrusion facing the second locking protrusion, and a locking groove is provided on the side of the second locking protrusion facing the first locking protrusion, the locking groove being adapted to the locking block.

[0015] Preferably, the locking device includes an anchor connector and a plurality of locking anchors arranged circumferentially along the anchor connector; the anchor connector is sleeved on the connecting shaft, the anchor connector is slidably engaged with the connecting shaft, the locking device is located between the implanter and the second delivery tube, and the anchor connector abuts against the second delivery tube.

[0016] More preferably, the anchor joint is provided with a locking groove, and the end face of the second conveying pipe is provided with a locking protrusion that matches the locking groove.

[0017] Preferably, the handle further includes a third housing, which is disposed on the first housing and communicates with the internal space of the first housing. The left atrial appendage closure device further includes a bending adjustment assembly, which includes a bending adjustment joint, a connecting rod, and a second knob. The second knob is located outside the third housing. One end of the connecting rod is connected to the second knob. The connecting rod is threadedly connected to the first housing. The other end of the connecting rod extends into the first housing and is connected to the bending adjustment joint. The controllable conduit includes a fixed ring, a first conduit segment, and a second conduit segment connected in sequence. The fixed ring is connected to a traction line, and the end of the traction line away from the fixed ring is connected to the bending joint.

[0018] More preferably, the bending adjustment assembly further includes a stabilizing block, which is sleeved on the connecting rod, threadedly connected to the connecting rod, and slidably engaged with the inner wall of the first housing.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes the cooperation of a first pushing component and a knob component to drive the axial movement and rotation of a first delivery tube, a second pushing component to drive the axial movement of a second delivery tube, and a third pushing component to drive the axial movement of a controllable catheter, allowing the implanter and locking device to be exposed and retracted into the controllable catheter. Through the cooperation of the knob component, the first pushing component, the second pushing component, and the third pushing component, the implanter and locking device can be precisely delivered and released during left atrial appendage closure surgery, and the left atrial appendage tissue is pulled and wrapped around the implanter and clamped between the implanter and the locking device, making it difficult for the implanter and locking device to fall off. The operation steps of the left atrial appendage closure device described in this invention are simple and easy for doctors to operate. Attached Figure Description

[0020] Figure 1 A cross-sectional view of the left atrial appendage closure device provided by this utility model; Figure 2 This is a front view of the left atrial appendage closure device provided by this utility model; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This is a schematic diagram showing the first delivery pipe and connecting shaft in a locked state. Figure 5 This is a schematic diagram showing the first delivery pipe and connecting shaft in the unlocked state.

[0021] In the diagram, 1 is the tube assembly, 11 is the first delivery tube, 111 is the first tube segment, 1111 is the locking protrusion, 1112 is the locking block, 112 is the second tube segment, 113 is the third tube segment, 12 is the second delivery tube, 13 is the controllable catheter, 131 is the first catheter segment, 132 is the second catheter, 133 is the fixing ring, 2 is the implanter, 21 is the implantation claw, 22 is the implanter connector, 23 is the connecting shaft, 231 is the locking protrusion, 3 is the locking device, 31 is the locking anchor, 32 is the anchor connector, 321 is the locking groove, 4 is the handle, 41 is the first housing, 411 is the first slide groove, and 412 is the second delivery tube. Two sliding grooves, 413 is the third sliding groove, 42 is the second housing, 43 is the third housing, 5 is the knob assembly, 51 is the first knob, 52 is the first knob connector, 53 is the second knob connector, 6 is the first push assembly, 61 is the first slider, 62 is the first slide rod, 63 is the first control block, 7 is the second push assembly, 71 is the second slider, 72 is the second slide rod, 73 is the second control block, 8 is the third push assembly, 81 is the third slider, 82 is the third slide rod, 83 is the third control block, 9 is the bending adjustment assembly, 91 is the bending connector, 92 is the stabilizing block, 93 is the connecting rod, and 94 is the second knob. Detailed Implementation

[0022] To better illustrate the purpose, technical solution, and advantages of this utility model, the following will provide a further description of the utility model in conjunction with specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating the number of technical features indicated. Thus, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include at least one of that feature.

[0024] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] In this invention, all directional indicators (such as up, down, inside, outside) are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] In the description of this utility model, it should also be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "linked", and "set up" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0028] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Unless otherwise specified, all embodiments of this utility model can be combined with each other to form new technical solutions.

[0030] Please see Figures 1-5 This utility model provides a left atrial appendage closure device. The left atrial appendage closure device includes a tube assembly 1, an implant 2, a locking device 3, a handle 4, a knob assembly 5, a first pushing assembly 6, a second pushing assembly 7, and a third pushing assembly 8, wherein... The tube assembly 1 includes a first delivery tube 11, a second delivery tube 12 and a controllable conduit 13. The second delivery tube 12 is sleeved on the first delivery tube 11 and the controllable conduit 13 is sleeved on the second delivery tube 12. The handle 4 includes a first housing 41 and the first housing 41 is sleeved on the controllable conduit 13. The implanter 2 is positioned at the end of the first delivery tube 11 furthest from the handle 4; Locking device 3 is movably connected to implanter 2 via connecting shaft 23. Locking device 3 is located between implanter 2 and second delivery tube 12. Locking device 3 abuts against the end of second delivery tube 12 away from handle 4. The knob assembly 5, the first push assembly 6, the second push assembly 7 and the third push assembly 8 are respectively disposed on the handle 4; The knob assembly 5 is connected to the first conveying pipe 11, and the knob assembly 5 is used to drive the first conveying pipe 11 to rotate. The first pushing component 6 is connected to the first conveying pipe 11, and the first pushing component 6 is used to drive the first conveying pipe 11 to move along the axial direction of the first conveying pipe 11. The second pushing component 7 is connected to the second conveying pipe 12, and the second pushing component 7 is used to drive the second conveying pipe 12 to move along the axial direction of the second conveying pipe 12; The third pushing component 8 is connected to the controllable conduit 13, and the third pushing component 8 is used to drive the controllable conduit 13 to move along the axial direction of the controllable conduit 13.

[0031] This invention, through the cooperation of the first pushing component 6 and the knob component 5, can drive the first delivery tube 11 to move and rotate axially, the second pushing component 7 to drive the second delivery tube 12 to move axially, and the third pushing component 8 to drive the controllable catheter 13 to move axially, so that the implanter 2 and the locking device 3 can be exposed or retracted into the controllable catheter 13. Through the cooperation of the knob component 5, the first pushing component 6, the second pushing component 7, and the third pushing component 8, this invention can precisely deliver and release the implanter 2 and the locking device 3 during left atrial appendage closure surgery, and cause the left atrial appendage tissue to be pulled and wrapped around by the implanter 2 and clamped between the implanter 2 and the locking device 3, making it difficult for the implanter 2 and the locking device 3 to fall out. Furthermore, the operation steps of the left atrial appendage closure device described in this invention are simple and easy for doctors to operate.

[0032] In some embodiments, the knob assembly 5 includes a first knob 51 and a first knob connector 52. The first knob connector 52 is connected to the first knob 51. Both the first knob connector 52 and the first knob 51 are sleeved on the first conveying tube 11. The first knob connector 52 is housed within the first housing 41 and rotatably engages with the first housing 41. In use, this allows the operator to easily hold the first housing 41 and rotate the first knob 51, which in turn drives the first conveying tube 11 to rotate.

[0033] The first knob 51 and the first delivery tube 11 are engaged by a limiting groove and a limiting protrusion.

[0034] The limiting groove is disposed on the outer wall of the first conveying pipe 11 and extends along the axial direction of the first conveying pipe 11. The limiting protrusion corresponds to and is adapted to the limiting groove. One end of the limiting protrusion is accommodated in the limiting groove, and the other end of the limiting protrusion is disposed on the inner wall of the first knob 51.

[0035] The number of limiting grooves is no less than three and they are evenly distributed along the circumference of the first conveying pipe 11. The limiting grooves form a spline structure on the outer wall of the first conveying pipe 11. This structural design can increase the rotational torque without hindering the axial movement of the first conveying pipe 11, which is beneficial to improving the accuracy and stability of the first knob 51 in controlling the rotation start and stop position of the first conveying pipe 11.

[0036] Specifically, there is a gap between the first knob joint 52 and the first delivery pipe 11, or the first knob joint 52 and the first delivery pipe 11 are in sliding fit.

[0037] Specifically, the first knob 51 is located between the first housing 41 and the second housing 42. The outer wall of the first knob 51 is provided with pointer markings, and the outer wall of the first housing 41 near the first knob 51 is provided with rotation angle markings, so that the operator can determine the rotation range of the first delivery tube 11.

[0038] Specifically, the handle 4 also includes a second housing 42, and the knob assembly 5 also includes a second knob connector 53. The second knob connector 53 is connected to the first knob 51. The second knob connector 53 is sleeved on the first delivery tube 11. The second knob connector 53 is housed in the second housing 42 and is threadedly connected to the second housing 42.

[0039] There is a gap between the second knob joint 53 and the first conveying pipe 11, or the second knob joint 53 and the first conveying pipe 11 are in sliding fit.

[0040] The second housing 42 is provided with a through hole 421 that is adapted to the first delivery pipe 11.

[0041] The first knob connector 52, the first knob 51, and the second knob connector 54 are integrally formed and connected in sequence.

[0042] In some embodiments, the first pushing component 6 includes a first slider 61, a first sliding rod 62, and a first control block 63. A first sliding groove 411 is provided on the first housing 41. The first slider 61 is located inside the first housing 41 and is connected to the first conveying pipe 11. One end of the first sliding rod 62 is connected to the first slider 61, and the other end of the first sliding rod 62 passes through the first sliding groove 411 and is connected to the first slider 61. The first slider 61 is located outside the first housing 41 and slides in cooperation with the first sliding groove 411.

[0043] Specifically, the outer side of the first groove 411 is provided with distance scale.

[0044] In some embodiments, the second pushing component 7 includes a second slider 71, a second slide rod 72, and a second control block 73. A second slide groove 412 is provided on the first housing 41. The second slider 71 is located inside the second housing 42 and is connected to the second conveying pipe 12. One end of the second slide rod 72 is connected to the second slider 71, and the other end of the second slide rod 72 passes through the second slide groove 412 and is connected to the second slider 71. The second slider 71 is located outside the first housing 41 and slides in cooperation with the second slide groove 412.

[0045] Specifically, the outer side of the second groove 412 is provided with distance scale.

[0046] In some embodiments, the third pushing component 8 includes a third slider 81, a third slide rod 82, and a third control block 83. A third slide groove 413 is provided on the first housing 41. The third slider 81 is located inside the second housing 42 and is connected to the controllable conduit 13. One end of the third slide rod 82 is connected to the third slider 81, and the other end of the third slide rod 82 passes through the third slide groove 413 and is connected to the third slider 81. The third slider 81 is located outside the first housing 41 and slides in cooperation with the third slide groove 413.

[0047] Specifically, the outer side of the third groove 413 is provided with distance scale.

[0048] It is understood that the present invention does not impose any particular restrictions on the length of the first slide groove 411, the second slide groove 412, and the third slide groove 413. Those skilled in the art can design the dimensions of each slide groove according to the actual situation.

[0049] In some embodiments, the implanter 2 includes an implanter connector 22, a connecting shaft 23, and a plurality of implantation claws 21 arranged circumferentially along the implanter connector 22. The implanter connector 22 is sleeved on the connecting shaft 23 and the implanter connector 22 is fixedly connected to the connecting shaft 23. The connecting shaft 23 is sleeved on the end of the first delivery tube 11 away from the handle 4. The outer wall of the end of the first delivery tube 11 away from the handle 4 is provided with a first locking protrusion 1111 extending axially along the first delivery tube 11. The inner wall of the connecting shaft 23 is provided with a second locking protrusion 231 extending axially along the connecting shaft 23. The first locking protrusion 1111 and the second locking protrusion 231 are adapted to each other.

[0050] Specifically, a locking block 1111 is provided on the side of the first locking protrusion 1111 facing the second locking protrusion 231, and a locking groove (not shown in the figure) is provided on the side of the second locking protrusion 231 facing the first locking protrusion 1111. The locking groove is adapted to the locking block 1112.

[0051] In use, when the implanter 2 is pushed to the center of the left atrial appendage opening and the implantation claw 21 touches the left atrial appendage, the first delivery tube 11 is rotated counterclockwise so that the first locking protrusion 1111 abuts against the second locking protrusion 231, and the locking block 1111 is inserted into the locking groove. At this time, the first delivery tube 11 and the connecting shaft 23 are in a state of... Figure 4 In the locked state shown, continuing to rotate the first delivery tube 11 counterclockwise can drive the connecting shaft 23 to rotate, which in turn drives the implanter connector 22 and the implant claw 21 to rotate, so that the left atrial appendage tissue is pulled together and wrapped around the implant claw 21 and the connecting shaft 23.

[0052] When it is necessary to release the implant 2, rotate the first delivery tube 11 clockwise so that the first locking protrusion 1111 moves away from the second locking protrusion 231, and the locking block 1111 disengages from the locking groove. At this time, the first delivery tube 11 and the connecting shaft 23 are in a state of... Figure 5 The unlocked state is shown.

[0053] Specifically, the implanted claw 21 is made of shape memory metal or shape memory alloy.

[0054] Specifically, in its natural state, several implanted claws 21 intertwine to form a semi-cage shape.

[0055] Specifically, the locking device 3 includes an anchor connector 32 and a plurality of locking anchors 31 arranged circumferentially along the anchor connector 32; the anchor connector 32 is sleeved on the connecting shaft 23, the anchor connector 32 and the connecting shaft 23 are slidably engaged, the locking device 3 is located between the implanter 2 and the second delivery tube 12, and the anchor connector 32 abuts against the second delivery tube 12.

[0056] The anchor joint 32 is provided with a locking groove 321, and the end face of the second conveying pipe 12 is provided with a locking protrusion that matches the locking groove 321 (not shown in the figure).

[0057] Specifically, in its natural state, several locking anchors 31 intertwine in an umbrella shape.

[0058] In some embodiments, the first delivery pipe 11 includes a first pipe segment 111, a second pipe segment 112, and a third pipe segment 113 connected in sequence. A locking protrusion 1111 is disposed at the end of the first pipe segment 111 away from the second pipe segment 112. The first slider 61 of the first pushing component 6 is sleeved on the second pipe segment 112 and threadedly connected to the second pipe segment 112. The limiting groove is disposed in the third pipe segment 113.

[0059] Specifically, the first pipe section 111 extends out of the second conveying pipe 12 and is threadedly connected to or integrally formed with the second pipe section 112, and the second pipe section 112 is threadedly connected to or integrally formed with the third pipe section 113.

[0060] Specifically, the outer diameter of the first pipe section 111 is smaller than the outer diameter of the second pipe section 112, and the outer diameter of the second pipe section 112 is smaller than the outer diameter of the third pipe section 113.

[0061] Specifically, the second pipe section 112 and the third pipe section 113 are both located inside the handle 4.

[0062] In some embodiments, the handle 4 further includes a third housing 43, which is disposed on the first housing 41 and communicates with the internal space of the first housing 41. The left atrial appendage closure device further includes a bending adjustment component 9, which includes a bending adjustment connector 91, a connecting rod 93 and a second knob 94. The second knob 94 is located outside the third housing 43. One end of the connecting rod 93 is connected to the second knob 94. The connecting rod 93 is threadedly connected to the first housing 41. The other end of the connecting rod 93 extends into the first housing 41 and is connected to the bending adjustment connector 91. The controllable conduit 3 includes a fixing ring 133, a first conduit segment 131 and a second conduit segment 132 connected in sequence. The fixing ring 133 is connected to a traction line (not shown in the figure), and the end of the traction line away from the fixing ring 133 is connected to the bending joint 91.

[0063] Specifically, the bending adjustment assembly 9 also includes a stabilizing block 92, which is sleeved on the connecting rod 93 and threadedly connected to the connecting rod 93. The stabilizing block 92 is also slidably engaged with the inner wall of the first housing 41.

[0064] In use, rotate the second knob 94 to rotate the connecting rod 93, which in turn moves the bending connector 9 along the axis of the connecting rod 93, thereby pulling or releasing the traction line, thus achieving the purpose of adjusting the bending angle of the controllable conduit 3. The bending angle of the first conduit segment 131 is 0~90°. When the bending angle is 0°, the first conduit segment 131 is in an unbent state.

[0065] Specifically, the traction line can be a metal wire.

[0066] Specifically, the hardness of the first catheter segment 131 is less than that of the second catheter segment 132. For example, the hardness of the first catheter segment 131 is 20~50D, and the hardness of the second catheter segment 132 is not less than 60D.

[0067] The first catheter segment 131 has a certain degree of elasticity. When subjected to the tension of the traction line, the first catheter segment 131 bends. After the tension of the traction line disappears, the first catheter segment 131 returns to its natural shape.

[0068] It is understood that the present invention does not impose any particular restrictions on the dimensions of the components (such as the first delivery tube 11, the second delivery tube 12, the controllable catheter 13, etc.) in the left atrial appendage closure device, and can be designed according to the actual application (such as the structure and size of the left atrial appendage).

[0069] Under X-ray monitoring, a vascular sheath is inserted through a femoral vein puncture, and a guidewire is advanced. The interatrial septum is punctured to establish access to the femoral vein, inferior vena cava, right atrium, and left atrium. A pigtail catheter is then advanced along the guidewire into the left atrium for left atrial appendage angiography to determine its structure and size. The pigtail catheter and guidewire are then withdrawn, and the left atrial appendage closure device described in this invention is used to perform left atrial appendage closure, which may include the following steps: The distal end of the controllable catheter 13 is inserted into the left atrial appendage through a vascular sheath, and the degree of bending of the distal end of the controllable catheter 13 can be adjusted by the bending adjustment component 9 during the process.

[0070] The distal end (i.e. the end away from the handle 4) of the tube assembly 1 pre-loaded with implanter 2 and locker 3 is delivered to a predetermined position along the controllable catheter 13 via the first push component 6. During delivery, both implanter 2 and locker 3 are in a retracted state.

[0071] The controllable catheter 13 is retracted by the third push component 8 until the implanter 2 is exposed. After the implanter 2 is exposed, the implant claw 21 naturally expands. The first push component 6 drives the first delivery catheter 11 to move axially, which in turn drives the implanter 2 to move axially until the implant claw 21 touches the left atrial appendage tissue. Then, the knob component 5 drives the first delivery tube 11 to rotate, which in turn drives the implanter 2 to rotate, so that the left atrial appendage tissue is pulled and wrapped around the implant claw 21 and the connecting shaft 23.

[0072] After confirming the closure of the left atrial appendage by comparing DSA fluoroscopy, angiography and TEE, the second delivery tube 12 is moved axially by the second push component 7, and the locking device 3 is pushed out of the controllable catheter 13. After the locking device 3 is pushed out, the locking anchor 31 naturally expands, thereby locking the locking anchor 31 with the left atrial appendage tissue.

[0073] Turn the first delivery tube 11 clockwise (as shown) Figure 5 Rotate (in the direction indicated by the middle arrow) to move the first locking protrusion 1111 away from the second locking protrusion 231, and to disengage the locking block 1112 from the locking groove. At this time, the first conveying pipe 11 and the connecting shaft 23 are in the following position. Figure 5 In the unlocked state shown, the first delivery tube 11 is withdrawn from the connecting shaft 23 by the first push component 6, thereby completing the release step of the implanter 2 and the locker 3.

[0074] After release, remove tube assembly 1 from the body.

[0075] All steps prior to the release step are reversible.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A left atrial appendage closure device, characterized in that, It includes a tube assembly, an implanter, a locking device, a handle, a knob assembly, a first push assembly, a second push assembly, and a third push assembly, wherein, The tube assembly includes a first delivery tube, a second delivery tube, and a controllable conduit. The second delivery tube is sleeved on the first delivery tube, and the controllable conduit is sleeved on the second delivery tube. The handle includes a first housing, which is sleeved on the controllable conduit. The implanter is positioned at the end of the first delivery tube furthest from the handle; The locking device is movably connected to the implanter via a connecting shaft. The locking device is located between the implanter and the second delivery tube, and the locking device abuts against the end of the second delivery tube away from the handle. The knob assembly, the first push assembly, the second push assembly, and the third push assembly are respectively disposed on the handle; The knob assembly is connected to the first conveying tube, and the knob assembly is used to drive the first conveying tube to rotate. The first pushing component is connected to the first conveying pipe, and the first pushing component is used to drive the first conveying pipe to move along the axial direction of the first conveying pipe; The second pushing component is connected to the second conveying pipe, and the second pushing component is used to drive the second conveying pipe to move along the axial direction of the second conveying pipe; The third pushing component is connected to the controllable conduit, and the third pushing component is used to drive the controllable conduit to move along the axial direction of the controllable conduit.

2. The left atrial appendage closure device as described in claim 1, characterized in that, The knob assembly includes a first knob and a first knob connector. The first knob connector is connected to the first knob. Both the first knob connector and the first knob are sleeved on the first delivery tube. The first knob connector is housed in the first housing and rotates with the first housing.

3. The left atrial appendage closure device as described in claim 2, characterized in that, The first knob and the first conveying tube are engaged by a limiting groove and a limiting protrusion; the limiting groove is provided on the outer wall of the first conveying tube and extends along the axial direction of the first conveying tube, the limiting protrusion corresponds to and is adapted to the limiting groove, one end of the limiting protrusion is accommodated in the limiting groove, and the other end of the limiting protrusion is provided on the inner wall of the first knob. And / or, the number of the limiting grooves is not less than three and they are evenly distributed along the circumference of the first conveying pipe, and the limiting grooves form a spline structure on the outer wall of the first conveying pipe.

4. The left atrial appendage closure device as described in claim 1, characterized in that, The first pushing component includes a first slider, a first slide rod, and a first control block. A first slide groove is provided on the first housing. The first slider is located inside the first housing and is connected to the first delivery pipe. One end of the first slide rod is connected to the first slider, and the other end of the first slide rod passes through the first slide groove and is connected to the first slider. The first slider is located outside the first housing and slides in cooperation with the first slide groove. And / or, the handle further includes a second housing, the second pushing assembly includes a second slider, a second slide rod and a second control block, the first housing is provided with a second slide groove, the second slider is located inside the second housing and connected to the second delivery pipe, one end of the second slide rod is connected to the second slider, the other end of the second slide rod passes through the second slide groove and is connected to the second slider, the second slider is located outside the first housing and slides in cooperation with the second slide groove; And / or, the handle further includes a second housing, the third push assembly includes a third slider, a third slide rod and a third control block, the first housing is provided with a third slide groove, the third slider is located inside the second housing and connected to the controllable conduit, one end of the third slide rod is connected to the third slider, the other end of the third slide rod passes through the third slide groove and is connected to the third slider, the third slider is located outside the first housing and slides in cooperation with the third slide groove.

5. The left atrial appendage closure device as described in claim 1, characterized in that, The implanter includes an implanter connector, a connecting shaft, and several implantation claws arranged circumferentially along the implanter connector. The implanter connector is sleeved on the connecting shaft, and the connecting shaft is sleeved on the end of the first delivery tube away from the handle. The outer wall of the end of the first delivery tube away from the handle is provided with a first locking protrusion extending axially along the first delivery tube, and the inner wall of the connecting shaft is provided with a second locking protrusion extending axially along the connecting shaft. The first locking protrusion and the second locking protrusion are adapted to each other.

6. The left atrial appendage closure device as described in claim 5, characterized in that, A locking block is provided on the side of the first locking protrusion facing the second locking protrusion, and a locking groove is provided on the side of the second locking protrusion facing the first locking protrusion, the locking groove being adapted to the locking block.

7. The left atrial appendage closure device as described in claim 1, characterized in that, The locking device includes an anchor connector and a plurality of locking anchors arranged circumferentially along the anchor connector; the anchor connector is sleeved on the connecting shaft, the anchor connector is slidably engaged with the connecting shaft, the locking device is located between the implanter and the second delivery tube, and the anchor connector abuts against the second delivery tube.

8. The left atrial appendage closure device as described in claim 7, characterized in that, The anchor joint is provided with a locking groove, and the end face of the second conveying pipe is provided with a locking protrusion that matches the locking groove.

9. The left atrial appendage closure device as described in claim 1, characterized in that, The handle also includes a third housing, which is disposed on the first housing and communicates with the internal space of the first housing. The left atrial appendage closure device also includes a bending adjustment assembly, which includes a bending adjustment joint, a connecting rod and a second knob. The second knob is located outside the third housing. One end of the connecting rod is connected to the second knob. The connecting rod is threadedly connected to the first housing. The other end of the connecting rod extends into the first housing and is connected to the bending adjustment joint. The controllable conduit includes a fixed ring, a first conduit segment, and a second conduit segment connected in sequence. The fixed ring is connected to a traction line, and the end of the traction line away from the fixed ring is connected to the bending joint.

10. The left atrial appendage closure device as described in claim 9, characterized in that, The bending adjustment assembly further includes a stabilizing block, which is sleeved on the connecting rod and threadedly connected to the connecting rod. The stabilizing block also slides against the inner wall of the first housing.

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