A left atrial appendage occluder closing device and closing method

Abstract

The application discloses a left auricle plugging device closing device and closing method, belongs to the technical field of left auricle plugging device, and is used for closing and positioning the proximal end of the left auricle plugging device. The closing device comprises a positioning ring used for cooperating with the end of the supporting rod of the left auricle plugging device to be closed, a clamping groove used for being mutually embedded with the proximal end of the supporting rod of the left auricle plugging device is arranged on the positioning ring in the circumferential direction, the second clamping parts of adjacent clamping grooves are mutually staggered along the axis direction of the positioning ring, and a fixing ring used for tightly pressing the proximal end of the supporting rod of the left auricle plugging device in the positioning ring is coaxially arranged on the outer periphery of the positioning ring. The closing device can reduce the circumferential space occupied by the proximal end of the supporting rod when being closed, thereby reducing the diameter of the positioning ring when the left auricle plugging device of the same specification is closed, the purpose of reducing the overall size of the plugging device in the closed state is achieved, the size requirement of the small-diameter conveying pipe can be met, and the application performance of the left auricle plugging device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of left atrial appendage occluder, in particular to a left atrial appendage occluder closing device and closing method. BACKGROUND

[0002] After the left atrial appendage occluder completes heat treatment and shaping, the end of the support rod needs to be closed and welded in order to add a covering layer and assemble it later. However, due to the complex structure and small shape of the left atrial appendage occluder, the number of support rods is large, and it is difficult to uniformly close the end of the left atrial appendage occluder. In addition, the uniformity of the closing cannot be guaranteed. If the left atrial appendage occluder is not closed well, it will bring many problems. First, poor closing may affect the mechanical properties of the occluder, such as wear resistance, tensile strength and bending performance, which may affect the stability and durability of the occluder. Second, poor closing may cause incomplete occlusion of the occluder, leading to blood leakage from the closed part, causing bleeding, arrhythmia and other complications. In addition, poor closing may also cause bubbles to form inside the occluder, affecting the occlusion effect of the occluder, and even causing thrombosis, cerebral embolism and other serious complications. Finally, poor closing may also cause other complications. Therefore, the closing quality is particularly important for the left atrial appendage occluder.

[0003] The end of the existing left atrial appendage occluder is closed by using a closing tool to position and fix the end of the support rod in the closing tool. The fixing and arrangement of the support rod determines the size of the closing tool. Before the occluder is released, the support rod can be retracted, but the size of the closing tool remains unchanged. Therefore, the diameter of the delivery catheter is limited by the size of the closing tool, resulting in the problem that the delivery cannot be smoothly performed due to the excessive diameter of the tool in the actual operation process. SUMMARY

[0004] Technical purpose: In view of the problem that the size of the existing occluder is affected by the size of the closing tool, and cannot meet the demand of small-diameter delivery and release, the present application discloses a left atrial appendage occluder closing device and closing method which can effectively reduce the outer diameter of the closing tool after closing, and ensure the uniformity of the closing.

[0005] Technical scheme: In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0006] The application discloses a left auricle occluder closing device for sheathing and positioning the proximal end of a left auricle occluder, which comprises a positioning ring for sheathing the end of a supporting rod of the left auricle occluder, wherein a clamping groove for mutually clamping the proximal end of the supporting rod of the left auricle occluder is arranged on the positioning ring in a circumferential direction, the clamping groove comprises a first clamping part consistent with the rod body of the supporting rod and a second clamping part arranged perpendicularly to the first clamping part and extending outward from the first clamping part, the second clamping parts of adjacent clamping grooves are staggered with each other along the axis direction of the positioning ring, the proximal end of the supporting rod of the left auricle occluder is matched with the shape of the corresponding clamping groove, and a fixing ring is coaxially arranged on the outer periphery of the positioning ring and used for pressing the proximal end of the supporting rod of the left auricle occluder in the positioning ring.

[0007] Preferably, an assembling groove is arranged on the fixing ring of the application, the assembling groove simultaneously has the first clamping part of the clamping groove and the two second clamping parts arranged staggeredly, the assembling groove is matched with the corresponding clamping groove by rotating the fixing ring, the clamping of the end of the supporting rod is performed, and the fixed supporting rod is pressed on the positioning ring by continuously rotating the fixing ring after the clamping is completed.

[0008] Preferably, the closing device of the application is provided with a core rod and a positioning pipe group for coaxially positioning the positioning ring, the positioning pipe group comprises a positioning short pipe abutting at one end of the clamping groove of the positioning ring and a positioning long pipe at the other end of the positioning ring, the core rod is coaxially arranged in the positioning ring, the positioning short pipe and the positioning long pipe are sleeved on the core rod, the positioning long pipe is connected with the end of the positioning ring through a concave-convex type clamping structure, and the orientation of the positioning ring is adjusted by rotating the positioning long pipe.

[0009] Preferably, the positioning pipe group of the application is externally sleeved with a fixing pipe group for positioning and operating the fixing ring, the fixing pipe group comprises a fixing short pipe and a fixing long pipe, the fixing short pipe is correspondingly sleeved on the outer side of the positioning short pipe and abuts at the end with the end of the fixing ring, the fixing long pipe is correspondingly sleeved on the outer side of the positioning long pipe and is connected with the fixing ring through a concave-convex type clamping structure at the end, the fixing ring is rotated by rotating the fixing long pipe, and the switching of the clamping groove corresponding to the assembling groove is performed.

[0010] Preferably, the end of the positioning long pipe away from the positioning ring is provided with a distal end fixator for fixedly positioning the core rod, the positioning long pipe and the fixing long pipe, the distal end fixator comprises a positioning block and a positioning hole penetratingly arranged in the center of the positioning block, the size of the positioning hole is matched with the size of the core rod, a rectangular positioning hole is arranged around the positioning hole at the end of the positioning block close to the positioning long pipe, the width of the rectangular positioning hole is between the diameter of the positioning long pipe and the diameter of the fixing long pipe, and the end of the positioning long pipe is provided with a limiting rod for penetrating in the rectangular positioning hole and limiting the relative rotation between the positioning long pipe and the positioning block.

[0011] Preferably, the thickness of the positioning ring of the application is consistent with the thickness of the left atrial appendage occluder support rod, the clamping groove penetrates through the positioning ring, and a support ring for limiting the end of the support rod in the clamping groove of the positioning ring is arranged concentrically on the inner ring of the positioning ring, and assembling holes are arranged on the support ring, the positioning ring and the fixing ring, and the three are locked and fixed through the fixing rod penetrating in the assembling holes.

[0012] Preferably, the support ring of the application is positioned by a support pipe group, the support pipe group comprises a support short pipe and a support long pipe, the support short pipe is sleeved on the mandrel and coaxially located in the positioning short pipe, the end abuts against the support ring, the support long pipe is coaxially located in the positioning long pipe, the support long pipe and the end of the support ring are connected through the concave-convex type fitting structure, and a proximal end fixator is arranged at the common end of the support short pipe, the positioning short pipe and the fixing short pipe, and the end of the mandrel, the support short pipe, the positioning short pipe and the fixing short pipe is positioned and fixed through the proximal end fixator.

[0013] Preferably, the clamping groove of the application is located on the side of the positioning ring close to the positioning short pipe, the shape of the clamping groove is consistent with the shape of the corresponding support rod after being turned inward, and the positioning short pipe and the fixing short pipe are provided with mounting grooves at positions corresponding to the clamping groove, so as to allow the bending space of the support rod, and after the end of the left atrial appendage occluder is gathered, the gathering position of the support rod is located in the inside of the left atrial appendage occluder.

[0014] Preferably, the clamping groove of the application is alternately arranged in T shape and cross shape.

[0015] The application also provides a left atrial appendage occluder closing method, and the positioning ring and the fixing ring are assembled concentrically by using the left atrial appendage occluder closing device, the position of the positioning ring is kept fixed, the fixing ring is rotated, the assembling groove of the fixing ring is corresponded to one of the clamping grooves on the positioning ring, the support rod on the left atrial appendage occluder corresponding to the clamping groove is placed into the clamping groove, the fixing ring is rotated, the assembling groove of the fixing ring is switched to the next clamping groove, the support rod which has been embedded is limited in the positioning ring, the fixing ring and the positioning ring are fixed by continuously rotating the fixing ring until all the support rods are embedded in the clamping grooves, the assembling groove is located between the adjacent clamping grooves, and the closing of the proximal end of the support rod of the left atrial appendage occluder is completed.

[0016] Beneficial effects: the left atrial appendage occluder structure and the occluder closing device provided by the application have the following beneficial effects:

[0017] 1. In this invention, the second engaging portions of adjacent slots on the positioning ring are staggered along the axial direction of the positioning ring, and the end of the support rod of the left atrial appendage occluder is set to a shape consistent with the slot. This reduces the circumferential space occupied when the support rod is contracted at the proximal end, thereby reducing the diameter of the positioning ring when the left atrial appendage occluder of the same specification is contracted. This achieves the purpose of reducing the overall size of the occluder in the contracted state, so that it can meet the size requirements of small-diameter delivery pipes and improve the application performance of the left atrial appendage occluder.

[0018] 2. The second snap-fit ​​portion of the present invention extends along the first snap-fit ​​portion in a direction perpendicular to the support rod body, which can ensure sufficient axial fixing strength for the support rod. At the same time, the overall length of the support rod of the left atrial appendage occluder can be kept uniform. Through the cooperation between the support rod and the slot, the uniformity of the occluder's closing after assembly is improved, and the closing quality is guaranteed.

[0019] 3. This invention utilizes a mandrel for coaxial positioning of the positioning ring and the fixing ring, and uses a long tube for rotation and fixing operations through a concave-convex interlocking structure, reducing the difficulty of operation. In particular, it can improve the stability of operation when assembling small-sized seams.

[0020] 4. In this invention, both the positioning short tube and the fixing short tube are provided with corresponding mounting grooves on the side close to the slot, so that the support rod can be bent inward and assembled with the slot. The final left atrial appendage occluder obtained by closing the end is located inside the mesh area formed by the support rod, which can form an end-concave occluder structure, which can further reduce the volume of the occluder, reduce the delivery resistance, and also avoid damage to the treatment subject caused by the structure of the assembly part after the occluder is released.

[0021] 5. The fixing ring of the present invention is provided with an assembly groove. By rotating the fixing ring, the assembly groove is aligned with the slot. After the current support rod end is fixed, the fixing ring is rotated again, so that when other support rods are fixed, the position of the support rod that has been fixed remains unchanged, thereby reducing the assembly difficulty and improving the uniformity of the assembled closing section.

[0022] 6. The present invention utilizes a two-section pipe structure to axially fix the corresponding short joints, and the assembly slots are switched by rotating the short joints of the cover layer through the long pipe of the cover layer, which facilitates the assembly operation and disassembly, thereby improving the assembly efficiency.

[0023] 7. The positioning block of the distal fixator of the present invention uses a rectangular positioning hole to limit the rotation of the positioning tube, while not affecting the free rotation of the fixed tube. When closing the proximal end of the left atrial appendage occluder, it can ensure the stability of the positioning ring position. At the same time, the fixed ring can be operated to rotate and switch the slot, simplifying the operation method and improving the efficiency and quality of the closing assembly. Attached Figure Description

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0025] Figure 1 The left atrial appendage occluder assembly overall structure diagram of the present application is shown in the figure.

[0026] Figure 2 The positioning ring and positioning tube group structure diagram of the present application is shown in the figure.

[0027] Figure 3 The positioning ring structure diagram of the present application is shown in the figure.

[0028] Figure 4 The fixed ring and fixed tube group structure diagram of the present application is shown in the figure.

[0029] Figure 5 The fixed ring structure diagram of the present application is shown in the figure.

[0030] Figure 6 The support ring and support tube group structure diagram of the present application is shown in the figure.

[0031] Figure 7 The positioning block structure diagram of the present application is shown in the figure.

[0032] Figure 8 The left atrial appendage occluder proximal end collection structure schematic diagram of the present application is shown in the figure.

[0033] Among them, 1-left atrial appendage occluder, 2-positioning ring, 3-slot, 4-first clamping part, 5-second clamping part, 6-fixed ring, 7-assembly slot, 8-core rod, 9-positioning short tube, 10-positioning long tube, 11-fixed long tube, 12-distal end fixer, 13-positioning block, 14-positioning hole, 15-rectangular positioning hole, 16-limiting rod, 17-support ring, 18-assembly hole, 19-fixed rod, 20-support short tube, 21-support long tube, 22-proximal end fixer, 23-fixed short tube, 24-mounting slot, 25-supporting rod. Embodiment

[0034] The present application will be more clearly and completely described below by means of a preferred embodiment and in conjunction with the drawings, but the present application will not be limited in the scope of the described embodiments.

[0035] As Figures 1-8The application discloses a left auricle occluder closing device, which is used for closing and positioning the proximal end of a left auricle occluder 1 and comprises a positioning ring 2 used for closing and positioning the end of a supporting rod 25 of the left auricle occluder 1, wherein a clamping groove 3 used for being clamped with the proximal end of the supporting rod 25 of the left auricle occluder 1 is formed on the positioning ring 2 in a circumferential direction, the clamping groove 3 comprises a first clamping part 4 consistent with the rod body of the supporting rod 25 and a second clamping part 5 arranged perpendicularly to the first clamping part 4 and symmetrically relative to the first clamping part 4, the second clamping parts 5 of adjacent clamping grooves 3 are staggered relative to each other along the axis direction of the positioning ring 2, the proximal end of the supporting rod 25 of the left auricle occluder 1 is matched with the shape of the corresponding clamping groove 3, and a fixing ring 6 used for pressing the proximal end of the supporting rod 25 of the left auricle occluder 1 in the positioning ring 2 is coaxially arranged on the outer periphery of the positioning ring 2.

[0036] By means of the staggered second clamping parts 5, the end of the supporting rod 25 is clamped and fixed in cooperation with the corresponding first clamping part 4, the space occupied by the clamping parts can be reduced while ensuring the position uniformity of the supporting rods, thereby realizing the reduction of the size of the assembling part while ensuring sufficient structural strength, enabling the left auricle occluder to meet the size requirement of a small-diameter delivery catheter and improving the application performance of the product; the first clamping part is separately arranged on one side of the supporting rod under the condition of ensuring sufficient connecting strength, thereby the required diameter of the closing of the occluder can be extremely reduced, the size can be reduced, and the size requirement in different use cases can be met; as an optimization, the clamping grooves 3 are alternately arranged in T shapes and cross shapes in the embodiments of the application.

[0037] The fixing ring 6 of the application is provided with an assembling groove 7, the assembling groove 7 is provided with the first clamping part 4 of the clamping groove and two second clamping parts 5 arranged staggeredly, the assembling groove is corresponded with the corresponding clamping groove 3 by rotating the fixing ring 6, the end of the supporting rod 25 is clamped, and after the clamping is completed, the fixing ring 6 is continuously rotated to press the clamped supporting rod 25 on the positioning ring 2, thereby realizing the closing and assembling of the supporting rods with different end structures by using a single assembling groove 7, and the fixing ring 6 only needs to be rotated in the same direction in sequence during the closing, and the end structure of the supporting rod 25 does not need to be separately distinguished, thereby improving the closing and assembling efficiency.

[0038] In order to keep the position of the positioning ring 2 and the fixing ring 6 stable during assembly, especially the assembly of small size structure, and facilitate the operation of the assembly personnel, the closing device of the application is provided with a mandrel 8 for coaxially positioning the positioning ring 2 and a positioning pipe group, the positioning pipe group comprises a positioning short pipe 9 abutting at one end of the positioning ring 2 and a positioning long pipe 10 at the other end of the positioning ring 2, the mandrel 8 is coaxially arranged in the positioning ring 2, the positioning short pipe 9 and the positioning long pipe 10 are sleeved on the mandrel 8, the positioning long pipe 10 and the end of the positioning ring 2 are connected through the concave-convex type fitting structure, and the orientation of the positioning ring 2 is adjusted by rotating the positioning long pipe 10.

[0039] The positioning pipe group is externally sleeved with a fixing pipe group for positioning and operating the fixing ring 6, the fixing pipe group comprises a fixing short pipe 23 and a fixing long pipe 11, the fixing short pipe 23 is correspondingly sleeved on the outside of the positioning short pipe 9, the end thereof abuts against the end of the fixing ring 6, the fixing long pipe 11 is correspondingly sleeved on the outside of the positioning long pipe 10, the end thereof is connected with the fixing ring 6 through the concave-convex type fitting structure, and the fixing ring 6 is rotated by rotating the fixing long pipe 11 to switch the corresponding clamping groove 3 of the assembly groove 7.

[0040] In addition to the initial adjustment, the positioning ring 2 needs to be rotated by the positioning long pipe 10, during assembly, the positioning ring 2 needs to be kept fixed, and the fixing ring 6 is rotated by the fixing long pipe 11 to switch the position of the assembly groove 7, in order to keep the relative position of the positioning ring 2 and the fixing ring 6 stable during the closing process and avoid the rotation of the fixing long pipe 10 affecting the positioning ring 2, the end of the positioning long pipe 10 away from the positioning ring 2 is provided with a distal end fixer 12 for fixing and positioning the mandrel 8, the positioning long pipe 10 and the fixing long pipe 11, the distal end fixer 12 comprises a positioning block 13 and a positioning hole 14 through the center of the positioning block 13, the size of the positioning hole 14 matches the size of the mandrel 8, the end of the positioning block 13 near the positioning long pipe 10 is provided with a rectangular positioning hole 15 around the positioning hole 14, the width of the rectangular positioning hole 15 is between the diameter of the positioning long pipe 10 and the diameter of the fixing long pipe 11, and the end of the positioning long pipe 10 is provided with a limiting rod 16 for being arranged in the rectangular positioning hole 15 to limit the relative rotation between the positioning long pipe 10 and the positioning block 13. When the position of the positioning block 13 is fixed, the corresponding positioning long pipe 10 is fixed, and the fixing long pipe 11 can rotate the fixing ring 6 as needed.

[0041] The thickness of the positioning ring 2 is consistent with the thickness of the left atrial appendage occluder support rod 25, the clamping groove 3 penetrates the positioning ring 2, the support ring 17 for limiting the end of the support rod 25 in the clamping groove 3 of the positioning ring 2 is arranged concentrically on the inner ring of the positioning ring 2, and the support ring 17, the positioning ring 2 and the fixing ring 6 are all provided with assembly holes 18, the three are locked and fixed through the fixing rod 19 penetrating in the assembly holes 18, the support ring 17 is positioned through the support pipe group, the support pipe group comprises a support short pipe 20 and a support long pipe 21, the support short pipe 20 is sleeved on the mandrel 8 and coaxially located in the positioning short pipe 9, the end is abutted with the support ring 17, the support long pipe 21 is coaxially located in the positioning long pipe 10, the support long pipe 21 and the end of the support ring 17 are connected through the concave-convex type fitting structure, and the proximal end fixer 22 is arranged at the common end of the support short pipe 20, the positioning short pipe 9 and the fixing short pipe 23, and the end of the mandrel 8, the support short pipe 20, the positioning short pipe 9 and the fixing short pipe 23 is positioned and fixed through the proximal end fixer 22.

[0042] When the support rod 25 is conventionally bunched along the length direction, the length of the final product left atrial appendage occluder 1 is increased, the clamping groove 3 of the present application is located on one side close to the positioning short pipe 9, the shape of the clamping groove 3 is consistent with the shape of the corresponding support rod 25 after being turned inward, the positioning short pipe 9 and the fixing short pipe 23 are provided with the mounting groove 24 at the position corresponding to the clamping groove 3, the bending space of the support rod 25 is opened through the mounting groove 24, after the end of the left atrial appendage occluder 1 is bunched, the bunched position of the support rod 25 is located in the inside of the left atrial appendage occluder 1, the size of the occluder after bunching can be shortened, and the occluder support rod has a certain degree of axial deformation ability, and the flexibility of the occluder is improved.

[0043] The present application also provides a left atrial appendage occluder bunching method, the positioning ring 2 and the fixing ring 6 are assembled concentrically, the position of the positioning ring 2 is kept fixed, the fixing ring 6 is rotated, the assembly groove 7 of the fixing ring 6 is corresponded to one of the clamping grooves 3 on the positioning ring 2, the support rod 25 corresponding to the clamping groove 3 on the left atrial appendage occluder 1 is placed into the clamping groove 3, the fixing ring 6 is rotated, the assembly groove 7 on the fixing ring 6 is switched to the next clamping groove 3, and the support rod 25 already embedded is limited in the positioning ring 2, the fixing ring 6 and the positioning ring 2 are fixed by continuously rotating the fixing ring 6 until all the support rods 25 are embedded in the clamping grooves 3, the assembly groove 7 is between the adjacent clamping grooves 3, and the bunching of the proximal end of the support rod 25 of the left atrial appendage occluder 1 is completed.

[0044] The closing device closing tool of the application in use, sequentially assemble the mandrel 8, the support tube group, the positioning tube group, the fixed tube group, the positioning ring 2 and the fixed ring 6, and sleeve the left atrial appendage occluder 1 on the fixed long tube 11, position the end of each tube through the distal end fixer 12 and the proximal end fixer 12, drive the fixed ring 6 to rotate through the fixed long tube 11, make the assembly groove 7 correspond to the clamping groove 3, then put the end of the corresponding support rod 25 into the clamping groove 3 along the assembly groove 7, the curved part of the support rod 25 is located in the installation groove 24, then continue to rotate the fixed ring 6, rotate the assembly groove 11 to the position of the next clamping groove 3, at the same time, limit the support rod 25 which has been clamped in the positioning ring 2, in order to avoid the assembly groove 7 repeatedly pass through the clamping groove which has been clamped, in the actual assembly of the left atrial appendage occluder, take the corresponding position of each assembly hole 18 as the starting point, and rotate the covering layer long tube 17 in a single direction, sequentially clamp and fix the end of the support rod 1, until the assembly hole 18 coincides again, insert the fixed rod 19, complete the fixation between the fixed ring 6, the positioning ring 2 and the support ring 17, finally, sequentially remove the fixer and each tube group and other components according to the assembly order, and get the left atrial appendage occluder product which is closed.

[0045] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A device for the retraction of a left atrial appendage occluder (1) for the retraction of the proximal end of a left atrial appendage occluder (1), characterized in that The positioning ring (2) is provided with a plurality of card slots (3) which are circumferentially arranged on the positioning ring (2) and are used for being embedded with the proximal end of the support rod (25) of the left atrial appendage occluder (1), each of the card slots (3) comprises a first clamping part (4) which is consistent with the rod body of the support rod (25) and a second clamping part (5) which is arranged perpendicularly to the first clamping part (4) and extends outward from the first clamping part (4), the second clamping parts (5) of adjacent card slots (3) are staggered along the axis direction of the positioning ring (2), the card slots (3) are alternately arranged in T-shape and cross shape, the shape of the proximal end of the support rod (25) of the left atrial appendage occluder (1) is matched with the shape of the corresponding card slot (3), the shape of the card slot (3) is consistent with the shape of the corresponding support rod (25) after being turned inward, and the outer periphery of the positioning ring (2) is coaxially provided with a fixing ring (6) which is used for pressing the proximal end of the support rod (25) of the left atrial appendage occluder (1) in the positioning ring (2).

2. The left atrial appendage occlusion device closing device according to claim 1, characterized in that, The fixing ring (6) is provided with an assembly slot (7), the assembly slot (7) simultaneously has the first clamping part (4) and the two second clamping parts (5) which are arranged in a staggered manner, the assembly slot (7) is matched with the corresponding card slot (3) by rotating the fixing ring (6), the end part of the support rod (25) is embedded, and after the embedding is completed, the fixing ring (6) is continuously rotated to press the embedded support rod (25) on the positioning ring (2).

3. The left atrial appendage occlusion device closing device according to claim 1, characterized in that, The closing device is provided with a core rod (8) which is used for coaxially positioning the positioning ring (2) and a positioning pipe group, the positioning pipe group comprises a positioning short pipe (9) which abuts on one end of the positioning ring (2) where the card slot (3) is located and a positioning long pipe (10) which is located at the other end of the positioning ring (2), the core rod (8) is coaxially arranged in the positioning ring (2), the positioning short pipe (9) and the positioning long pipe (10) are sleeved on the core rod (8), the positioning long pipe (10) and the end part of the positioning ring (2) are connected through a concave-convex type fitting structure, and the orientation of the positioning ring (2) is adjusted by rotating the positioning long pipe (10).

4. The left atrial appendage occlusion device closing device according to claim 3, characterized in that, The positioning pipe group is externally sleeved with a fixing pipe group which is used for positioning and operating the fixing ring (6), the fixing pipe group comprises a fixing short pipe (23) and a fixing long pipe (11), the fixing short pipe (23) is correspondingly sleeved on the outer side of the positioning short pipe (9) and abuts on the end part of the fixing ring (6), the fixing long pipe (11) is correspondingly sleeved on the outer side of the positioning long pipe (10) and is connected with the fixing ring (6) through a concave-convex type fitting structure, the fixing ring (6) is rotated by rotating the fixing long pipe (11), and the switching of the card slot (3) corresponding to the assembly slot (7) is performed.

5. The left atrial appendage closure device colleting device of claim 4, wherein, The positioning long tube (10) is provided with a distal end fixer (12) at one end away from the positioning ring (2) for fixing and positioning the mandrel (8), the positioning long tube (10) and the fixed long tube (11), the distal end fixer (12) comprises a positioning block (13) and a positioning hole (14) penetrating through the center of the positioning block (13), the size of the positioning hole (14) matches the size of the mandrel (8), and the positioning block (13) is provided with a rectangular positioning hole (15) around the positioning hole (14) at one end close to the positioning long tube (10), the width of the rectangular positioning hole (15) is between the diameter of the positioning long tube (10) and the diameter of the fixed long tube (11), and the end of the positioning long tube (10) is provided with a limiting rod (16) for penetrating into the rectangular positioning hole (15) to limit the relative rotation between the positioning long tube (10) and the positioning block (13).

6. The left atrial appendage closure device colleting device of claim 4, wherein, The thickness of the positioning ring (2) is consistent with the thickness of the support rod (25), the clamping groove (3) penetrates through the positioning ring (2), and a support ring (17) is arranged in the inner circle of the positioning ring (2) in a concentric manner for cooperating with the fixed ring (6) to limit the end of the support rod (25) in the clamping groove (3) of the positioning ring (2), and assembly holes (18) are arranged on the support ring (17), the positioning ring (2) and the fixed ring (6), and the three are locked and fixed through the fixing rod (19) penetrating into the assembly holes (18).

7. The left atrial appendage closure device colleting device of claim 6, wherein, The support ring (17) is positioned by a support pipe group, the support pipe group comprises a support short tube (20) and a support long tube (21), the support short tube (20) is sleeved on the mandrel (8) and coaxially located in the positioning short tube (9), the end abuts against the support ring (17), the support long tube (21) is coaxially located in the positioning long tube (10), the support long tube (21) and the end of the support ring (17) are connected through a concave-convex type fitting structure, and a proximal end fixer (22) is arranged at the common end of the support short tube (20), the positioning short tube (9) and the fixed short tube (23), and the end of the mandrel (8), the support short tube (20), the positioning short tube (9) and the fixed short tube (23) is positioned and fixed through the proximal end fixer (22).

8. The left atrial appendage closure device colleting device of claim 6, wherein, The clamping groove (3) is located on the side of the positioning ring (2) close to the positioning short tube (9), the shape of the clamping groove (3) is consistent with the shape of the corresponding support rod (25) after being turned inward, the positioning short tube (9) and the fixed short tube (23) are provided with mounting grooves (24) at positions corresponding to the clamping groove (3), the bending space of the support rod (25) is released through the mounting grooves (24), and after the end of the left atrial appendage plugging device (1) is bunched, the bunched position of the support rod (25) is located in the inside of the left atrial appendage plugging device (1).

9. A method for closing the left atrial appendage, using the device for closing the left atrial appendage according to any one of claims 1 to 8, characterized in that The positioning ring (2) and the fixing ring (6) are assembled concentrically, the position of the positioning ring (2) is fixed, the fixing ring (6) is rotated, the assembly groove (7) provided on the fixing ring (6) is corresponded with one of the clamping grooves (3) on the positioning ring (2), the support rod (25) on the left atrial appendage plugging device (1) which is corresponded with the clamping groove (3) is placed into the clamping groove (3), the fixing ring (6) is rotated, the assembly groove (7) on the fixing ring (6) is switched to the next clamping groove (3), and the support rod (25) which has been embedded is limited in the positioning ring (2); the fixing ring (6) is continuously rotated until all the support rods (25) are embedded in the clamping grooves (3), the assembly groove (7) is between the adjacent clamping grooves (3), the fixing ring (6) is fixed with the positioning ring (2), and the convergence of the proximal end of the support rod (25) of the left atrial appendage plugging device (1) is completed.

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