Auxiliary device for atrial ablation treatment

Abstract

The utility model relates to the technical field of medical instruments, in particular to an auxiliary device for atrial ablation treatment, which comprises a retractable and expandable support body, the support body is used for opening the atrium after being expanded in the atrium, and the expanded support body is of a hollow structure and is attached to the wall of the atrium. The hollow-out area of the supporting body provides space for atrial ablation treatment operation. After intervention, the support main body can expand in the atrium to open the atrium and limit the contraction and deformation of the atrium, so that the difficulty of determining an ablation point in the atrial ablation treatment can be reduced, an operator can place an ablation guide wire for the atrial ablation treatment at a required position more accurately and quickly, and the operation time of the atrial ablation treatment is shortened; meanwhile, in the working process of the ablation guide wire, the atrial wall cannot generate large relative displacement due to the existence of the supporting main body, so that accurate treatment and energy transfer can be achieved, a more ideal treatment effect is achieved, the operation difficulty of an operator is reduced, and the operation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an auxiliary device for atrial ablation therapy. Background Technology

[0002] Atrial ablation is a cardiac interventional procedure primarily used to treat atrial fibrillation (AF) and other arrhythmias. AF is a common heart condition characterized by rapid and irregular electrical activity in the atria, leading to uncoordinated atrial contractions, impaired blood flow, potential blood clot formation, and an increased risk of stroke. Globally, the number of AF patients is large and continues to rise due to population aging.

[0003] Traditional drug therapy has limited effectiveness in controlling atrial fibrillation, and long-term use of antiarrhythmic drugs may cause side effects. Therefore, atrial ablation surgery has become an important treatment option. Atrial ablation surgery restores a normal heart rhythm by eliminating or isolating the abnormal electrophysiological pathways that cause arrhythmias. During the procedure, doctors use an ablation catheter to precisely ablate specific areas within the atrium using energy forms such as radiofrequency, cryotherapy, or laser to eliminate abnormal electrical signals.

[0004] Atrial ablation is of great value in the treatment of atrial fibrillation (AF), but it also faces some challenges and difficulties: (1) Incomplete ablation path / non-transmissible: A key difficulty in atrial ablation is to ensure that the ablation path is complete and transmissible to avoid recurrence of AF. Incomplete ablation may lead to the persistence or recurrence of arrhythmia. (2) Difficulty in reaching the target / matrix with ablation energy: Ablation requires precise energy delivery to reach specific cardiac tissues, but sometimes due to the complexity of the cardiac structure, it is difficult for energy to accurately reach the target area. (3) Incomplete ablation of triggers outside the pulmonary veins: AF may be caused by multiple triggers outside the pulmonary veins. During the operation, these triggers may not be ablated one by one, affecting the treatment effect. (4) Inadequate postoperative verification: Some centers may not perform strict postoperative verification of ablation, which may lead to poor ablation effect. (5) Complication risk: Atrial ablation has certain surgical risks, including serious complications such as acute cardiac perforation and / or cardiac tamponade, thromboembolism, etc. (6) Technical challenges: Atrial ablation requires precise mapping of the arrhythmia in the target tissue, but current surgical ablation methods cannot fully utilize the precise mapping of the ablation circuit to locate the target tissue. (7) Challenges of hybrid ablation modalities: Hybrid ablation modalities for atrial fibrillation combine extracardiac surgical ablation and intracardiac catheter ablation, but the timing of combining the two is controversial. Simultaneous execution has both advantages and disadvantages. Extracardiac surgical ablation may cause edema around the lesion tissue, affecting conduction abnormalities. (8) Complexity of ablation strategies: Stepwise ablation has brought new opportunities for the treatment of persistent atrial fibrillation, but its surgical strategy is relatively complex, especially linear ablation of the left atrium. If the ablation line is not continuous and transmural, it may cause arrhythmia. (9) Identification and management of postoperative complications: Identification and management of common postoperative complications of atrial fibrillation catheter ablation are also one of the difficulties in the operation, including cardiac tamponade caused by cardiac perforation, thrombosis and bleeding, ablation-related pulmonary vein stenosis, left atrial esophageal fistula, etc.

[0005] The key to atrial ablation surgery lies in accurately determining the ablation point and ensuring effective delivery of ablation energy. However, the continuous contraction and deformation of the atrium pose challenges to the procedure, complicating the determination of the ablation point and the assessment of the ablation effect. Furthermore, the success rate of the surgery is influenced by various factors, including the patient's cardiac structure, the choice of ablation energy, and surgical technique. Therefore, improving the precision and safety of the procedure and reducing complications are key areas of research and technological innovation in the field of atrial ablation. With continuous advancements in medical technology and the development of new ablation techniques and auxiliary devices, it is hoped that the therapeutic effects of atrial ablation surgery can be further improved, bringing patients a better quality of life. Utility Model Content

[0006] In view of the above-mentioned defects in the prior art, the technical problem to be solved by this utility model is to provide an auxiliary device for atrial ablation therapy that can open the atrium and restrict atrial contraction, thereby reducing the difficulty of determining the ablation point in atrial ablation therapy and improving the treatment effect.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model provides an auxiliary device for atrial ablation therapy, including a contractile and expandable support body. The support body is used to expand and open the atrium within the atrium. The expanded support body has a hollow structure and is attached to the atrial wall. The hollow area of ​​the support body provides space for the atrial ablation therapy operation.

[0009] Preferably, the expanded shape of the support body is a sphere or near-sphere that approximates the shape of the atrial ventricle.

[0010] Preferably, the support body includes an upper connecting rod, a grid unit, and a lower connecting rod connected sequentially along the axial direction. Multiple upper and lower connecting rods are provided along the circumference of the support body. The upper ends of all upper connecting rods are gathered and connected to the upper connecting member, and the lower ends of all lower connecting rods are gathered and connected to the lower connecting member.

[0011] Preferably, the upper connector is provided with a connection structure for connecting a delivery system, which is used to deliver the auxiliary device into the atrium.

[0012] Preferably, the grid unit is a grid structure in which multiple links are connected at multiple nodes to form multiple grids, and the maximum width of the links and nodes does not exceed three-quarters of the diameter of the human vein opening and / or the size of the grid on the grid unit covering the position of the human vein opening is larger than the size of the human vein opening.

[0013] Preferably, the support body is integrally molded or woven from elastic memory material.

[0014] Preferably, the supporting structure is a self-expanding structure or a balloon-assisted expansion structure.

[0015] Preferably, the auxiliary device is made of a biodegradable material.

[0016] Preferably, the support body is provided with any one or more of the following: a positioning component, a fixing component, a potential detection component, and an electrode ablation component. The positioning component is used to locate the implantation position of the auxiliary device in the atrium, the fixing component is used to fix the end of the ablation guidewire used in the atrial ablation treatment, the potential detection component is used to monitor the electrical signal of the atrial wall, and the electrode ablation component is used to achieve ablation when the auxiliary device is attached to the atrial wall.

[0017] Preferably, the potential detection component and the electrode ablation component are an integrated unit with the combined functions of potential detection and electrode ablation.

[0018] Compared with the prior art, this utility model has significant progress:

[0019] This utility model discloses an auxiliary device for atrial ablation therapy. After intervention, the supporting body expands within the atrium, increasing its size. Under the action of the supporting body, the atrial contraction size decreases, meaning the atrial wall's position relative to the supporting body is within a smaller range of motion. This restricts atrial contraction and deformation, reducing the difficulty of determining the ablation point during atrial ablation therapy. This allows the operator to place the ablation guidewire more accurately and quickly, shortening the procedure time and improving the therapeutic effect. Simultaneously, during the guidewire's operation, the atrial wall does not undergo significant relative displacement due to the supporting body, thus achieving precise treatment and energy transfer, resulting in more ideal therapeutic effects, reducing the operator's operational difficulty, and improving surgical outcomes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment of the auxiliary device for atrial ablation therapy according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of another embodiment of the auxiliary device for atrial ablation therapy according to this utility model.

[0022] Figure 3 This is a schematic diagram of the auxiliary device for atrial ablation therapy according to an embodiment of the present invention, in which the device expands and opens the left atrium within the left atrium. Figure 3 a and 3b show two different implantation states of the assistive device in the left atrium.

[0023] Figure 4 This is a schematic diagram showing the interference between the connecting rod of the grid unit supporting the main body and the human venous opening in the auxiliary device for atrial ablation therapy according to an embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of the grid unit of the supporting body in the auxiliary device for atrial ablation therapy according to an embodiment of the present invention, in which the venous opening of the human body is avoided.

[0025] Figure 6 This is a schematic diagram of the upper connecting member in the auxiliary device for atrial ablation therapy according to an embodiment of the present invention.

[0026] Figure 7This is a top view schematic diagram of the upper connecting member in the auxiliary device for atrial ablation therapy according to an embodiment of this utility model.

[0027] Figure 8 This is a schematic diagram of a positioning component provided on the support body of an auxiliary device for atrial ablation therapy according to an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of a supporting body with a fixing component in an auxiliary device for atrial ablation therapy according to an embodiment of the present invention.

[0029] Figure 10 This is a schematic diagram of an auxiliary device for atrial ablation therapy according to an embodiment of the present invention, wherein a potential detection component is provided on the supporting body.

[0030] Figure 11 This is a schematic diagram of an auxiliary device for atrial ablation therapy according to an embodiment of the present invention, wherein an electrode ablation component is provided on the support body.

[0031] The reference numerals in the attached figures are explained as follows:

[0032] 1. Supporting Components

[0033] 11. Upper connecting rod

[0034] 12 grid cells

[0035] 121 Linkage

[0036] 122 nodes

[0037] 123 grid

[0038] 13 Lower connecting rod

[0039] 2. Upper connector

[0040] 21 Top Cover

[0041] 22 Bottom Cover

[0042] 23 Card Slots

[0043] 24 Reservoir

[0044] 25 Connection Structure

[0045] 3. Lower connector

[0046] 4. Positioning components

[0047] 5. Fixing components

[0048] 51 Fixed rod

[0049] 52. Fixing ring

[0050] 6 Potential detection components

[0051] 7 Grooves

[0052] 100 ablation guidewire

[0053] 101 catheter

[0054] 200 Left atrium

[0055] 300 human venous orifices Detailed Implementation

[0056] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0057] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0060] like Figures 1 to 11 The image shows an embodiment of the auxiliary device for atrial ablation therapy provided by this utility model.

[0061] See Figures 1 to 3The auxiliary device for atrial ablation therapy in this embodiment includes a contractile and expandable support body 1, which expands within the atrium to open it. In its contracted state, the support body 1 can be easily delivered from outside the body via blood vessels or the apex of the heart to the atrium using a delivery system. After being delivered into the atrium, the support body 1 expands into a hollow, stent-like structure. The expanded support body 1 has a hollow structure and adheres to the atrial wall, ensuring that it does not completely obstruct the atrial wall after opening. The hollow area of ​​the support body 1 provides space for the atrial ablation therapy operation, allowing the ablation guidewire 100 used in the atrial ablation therapy to contact the atrium for ablation. The ablation guidewire 100 is inserted into the atrium through a catheter 101, and its end contacts the atrium through the hollow area of ​​the support body 1 for ablation.

[0062] Therefore, the auxiliary device for atrial ablation therapy in this embodiment can expand and open the atrium within the atrium after intervention by means of the support body 1. After the atrium is expanded, its size increases, and under the action of the support body 1, the size of atrial contraction decreases. That is, the position of the atrial wall is within a smaller operating range relative to the support body 1, which restricts the contraction and deformation of the atrium. This reduces the difficulty of determining the ablation point in atrial ablation therapy, allowing the operator to place the ablation guidewire 100 for atrial ablation therapy more accurately and quickly in the required position, shortening the atrial ablation therapy operation time and improving the atrial ablation therapy effect. At the same time, during the operation of the ablation guidewire 100, the atrial wall will not undergo large relative displacement due to the presence of the support body 1, thus achieving precise treatment and energy transfer, realizing a more ideal treatment effect, reducing the operator's operational difficulty, and improving the surgical outcome.

[0063] The support body 1 of the auxiliary device for atrial ablation therapy in this embodiment can have different specifications, allowing the operator to select the appropriate size of auxiliary device according to different atrial sizes to achieve a better support effect and provide a stable atrial opening. Alternatively, the support body 1 can have different expansion dimensions to adapt to different atrial sizes, achieving a better support effect and providing a stable atrial opening.

[0064] In this embodiment, the support body 1 can be a self-expanding structure or a balloon-assisted expansion structure. The self-expanding structure is in a contracted state under external force constraint and can automatically expand to an open state when the external force constraint is removed, thus enabling the support body 1 to be contractile and expandable. The self-expanding structure can be made of elastic memory material and achieve contraction and self-expansion, offering advantages such as simple structure and simplified operation. The balloon-assisted expansion structure uses balloon inflation to assist in expanding the support body 1. Inflation of the balloon allows the support body 1 to expand. With the assistance of a catheter, the expanded support body 1 can be pulled into the catheter to achieve contraction. The balloon-assisted expansion structure can control the balloon inflation size through the balloon inflation volume, thus allowing the support body 1 to expand to different sizes, enabling the support body 1 to achieve different expansion dimensions.

[0065] In this embodiment, preferably, the support body 1 is made of an elastic memory material, which can be a memory metal, a memory alloy, or a cobalt-chromium alloy.

[0066] In one implementation, such as Figure 1 As shown, the support body 1 is integrally molded from an elastic memory material. Preferably, laser cutting can be used to cut the tubing of elastic memory materials such as memory metal or cobalt-chromium alloy, and then the integrally molded support body 1 can be obtained through shaping treatment.

[0067] In another implementation, such as Figure 2 As shown, the support body 1 is woven from an elastic memory material. Preferably, the support body 1 can be formed by weaving elastic memory materials such as memory alloy wires, and then shaped to obtain the woven support body 1.

[0068] In this embodiment, see Figures 1 to 3 Preferably, the expanded shape of the support body 1 is a spherical or near-spherical shape that is close to the shape of the atrial cavity, so that the support body 1 can contact the atrial wall to the maximum extent and achieve a better expansion effect. Figure 3 The illustration shows the state in which the auxiliary device for atrial ablation therapy of this embodiment is implanted into the left atrium 200, with the left atrium 200 being opened by the expanding support body 1, wherein... Figure 3 a and 3b show two different implantation states of the auxiliary device in the left atrium 200. It can be seen that the spherical or near-spherical support body 1 can fit well against the atrial wall and open the atrium.

[0069] See Figure 1 and Figure 2In this embodiment, preferably, the support body 1 includes an upper connecting rod 11, a grid unit 12 and a lower connecting rod 13 connected in sequence along the axial direction. The upper connecting rod 11 and the lower connecting rod 13 are provided in multiples along the circumference of the support body 1. The upper ends of all the upper connecting rods 11 are gathered and connected to the upper connecting member 2, and the lower ends of all the lower connecting rods 13 are gathered and connected to the lower connecting member 3.

[0070] The grid units 12 of the supporting body 1 primarily serve as circumferential supports. The grid size of the grid units 12 should be larger than the external dimensions of the ablation guidewire 100 or the ablation device to form a sufficiently large open area, ensuring that the ablation guidewire 100 or the ablation device can contact the atrial tissue through this open area. Preferably, the grid unit 12 is a grid-like structure consisting of multiple connecting rods 121 connected at multiple nodes 122 to form multiple grids 123. The grids 123 are the open areas of the supporting body 1, through which the ablation guidewire 100 contacts the atrium for ablation. The shape of the grids 123 is not limited; a rhomboid grid is preferred.

[0071] See Figure 4 The mesh unit 12 can be set such that the maximum width of the link 121 and the maximum width of the node 122 do not exceed three-quarters of the diameter of the human vein opening 300. This is to prevent the link 121 or node 122 of the mesh unit 12 supporting the auxiliary device from interfering with the human vein opening 300 after the auxiliary device is implanted into the atrium, thereby blocking the blood flow of the human vein opening 300 or forming a thrombus.

[0072] See Figure 5 Alternatively, the size of the mesh 123 covering the human vein opening 300 on the mesh unit 12 can be set to be larger than the size of the human vein opening 300. This avoids interference or obstruction of the human vein opening 300 by the connecting rod 121 or node 122 located near this position, allowing the mesh unit 12 to avoid the human vein opening 300, thereby preventing blockage of blood flow or thrombosis. When the mesh 123 covering the human vein opening 300 on the mesh unit 12 has a larger size, other meshes 123 can have a relatively smaller size while still meeting the requirement of being larger than the external dimensions of the ablation guidewire 100 or the ablation device.

[0073] The upper connecting rod 11 and lower connecting rod 13 of the support body 1 are constructed with spherical or near-spherical arc-shaped structures at the upper and lower ends of the support body 1 along the axial direction on both sides of the grid unit 12. The upper connecting piece 2 and lower connecting piece 3 respectively serve to gather the upper end of the upper connecting rod 11 and the lower end of the lower connecting rod 13, providing constraints for the free bodies at the upper and lower ends of the support body 1, so that the support body 1, composed of the upper connecting rod 11, grid unit 12 and lower connecting rod 13 connected sequentially along the axial direction, will be spherical or near-spherical after expansion.

[0074] See Figure 6 Preferably, the upper connector 2 includes an upper cover 21 and a lower cover 22. The upper cover 21 has a plurality of slots 23 spaced circumferentially along its upper edge. The slots 23 are arranged one-to-one with the plurality of upper connecting rods 11. The lower cover 22 has a receiving groove 24 for receiving the upper end of the upper connecting rod 11. After the upper end of each upper connecting rod 11 is inserted into the receiving groove 24 of the lower cover 22, the upper cover 21 is tightly closed on the lower cover 22 and the slots 23 are used to hold each upper connecting rod 11 in place, thereby pressing down the upper end of each upper connecting rod 11 and making it difficult for each upper connecting rod 11 to fall off the upper connector 2. The upper cover 21 is then tightly closed on the lower cover 22. The upper cover 21 and the lower cover 22 are welded together to ensure the tightness of the connection between the upper cover 21 and the lower cover 22.

[0075] See Figure 7 Preferably, the upper connector 2 is provided with a connecting structure 25 for connecting to a delivery system. The delivery system is used to deliver the auxiliary device into the atrium. The delivery system is detachably connected to the upper connector 2 via the connecting structure 25, thereby enabling the implantation, release, and removal of the auxiliary device. The connecting structure 25 on the upper connector 2 can be a threaded structure or a protruding structure. Correspondingly, the delivery system can be detachably connected to the connecting structure 25 on the upper connector 2 via a threaded connection or a tightening ring. The delivery system can use existing catheter delivery devices.

[0076] The lower connector 3 can adopt the same structure as the upper connector 2. In one embodiment, the implantation, release and withdrawal operations of the auxiliary device can be realized by connecting the upper connector 2 to the conveying system alone, and the lower connector 3 does not need to be connected to the conveying system. Therefore, the connecting structure 25 can be omitted from the lower connector 3.

[0077] In this embodiment, preferably, the auxiliary device is made of a biodegradable material. Specifically, the support body 1, the upper connector 2, and the lower connector 3 are all made of biodegradable materials, so that the auxiliary device can be gradually degraded in the body after being released in the atrium.

[0078] See Figures 8 to 11In this embodiment, preferably, the support body 1 is provided with any one or more of the following: positioning component 4, fixing component 5, potential detection component 6, and electrode ablation component.

[0079] Among them, the positioning component 4 is used to locate the implantation position of the auxiliary device in the atrium. For example... Figure 8 As shown, preferably, the positioning component 4 can be a developing coating or developing structure disposed at the node 122 of the grid unit 12 of the supporting body 1. The developing coating or developing structure can display the implantation position of the auxiliary device in the atrium in the developing equipment, thereby adjusting and positioning the implantation position of the auxiliary device in the atrium.

[0080] The fixing component 5 is used to fix the end of the ablation guidewire 100 used in atrial ablation therapy, thereby assisting in fixing the ablation guidewire 100. Preferably, as shown in the image... Figure 9 As shown, the fixing component 5 may include a fixing rod 51 and a fixing ring 52. One end of the fixing rod 51 is connected to the node 122 of the grid unit 12 of the supporting body 1, and the other end of the fixing rod 51 protrudes from the supporting body 1 and is fixedly connected to the fixing ring 52. The fixing ring 52 is located at a position corresponding to the grid 123. The fixing ring 52 is a circular ring. During operation, under image guidance, the end of the ablation guidewire 100 can be passed through the fixing ring 52 and then contact the atrium through the grid 123 for ablation. The fixing ring 52 can provide a fulcrum for the end of the ablation guidewire 100, assisting in the fixation and positioning of the end of the ablation guidewire 100 and preventing displacement during the operation.

[0081] The potential detection component 6 is used to monitor the electrical signals of the atrial wall to identify areas of abnormal signal function. Preferably, as follows: Figure 10 As shown, the potential detection component 6 can be an electrode set on the node 122 or the connecting rod 121 of the grid unit 12 of the supporting body 1. After the auxiliary device is implanted into the atrium, the electrode is attached to the atrial wall along with the grid unit 12, thereby enabling the monitoring of the electrical signal of the atrial wall.

[0082] The electrode ablation component is used to achieve ablation when it is attached to the atrial wall along with the auxiliary device. Preferably, such as Figure 11 As shown, a groove 7 can be opened on the upper connecting rod 11 or lower connecting rod 13 or the connecting rod 121 of the grid unit 12 of the auxiliary device support body 1. The groove 7 provides an entry point for power transmission devices such as wires. Electrodes can be embedded on the nodes 122 or connecting rods 121 of the grid unit 12 of the support body 1, thereby forming an electrode ablation component. Energy can be released on a specific electrode through power transmission of a specific line, thereby achieving ablation near the electrode position.

[0083] Preferably, the potential detection component 6 and the electrode ablation component are an integrated unit with the combined functions of potential detection and electrode ablation. That is, the electrode can be a component with the combined functions of potential detection and electrode ablation, which can both monitor the electrical signals of the atrial wall and determine the abnormal signal function area, and also realize ablation in the abnormal area.

[0084] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An auxiliary device for atrial ablation therapy, characterized in that, It includes a shrinkable and expandable support body (1), which is used to expand and open the atrium in the atrium. The expanded support body (1) has a hollow structure and is attached to the atrial wall. The hollow area of ​​the support body (1) provides space for atrial ablation treatment operation.

2. The auxiliary device for atrial ablation therapy according to claim 1, characterized in that, The expanded shape of the supporting body (1) is spherical or near-spherical, which is close to the shape of the atrial ventricle.

3. The auxiliary device for atrial ablation therapy according to claim 2, characterized in that, The support body (1) includes an upper connecting rod (11), a grid unit (12) and a lower connecting rod (13) connected in sequence along the axial direction. The upper connecting rod (11) and the lower connecting rod (13) are provided in multiples along the circumference of the support body (1). The upper ends of all the upper connecting rods (11) are gathered and connected to the upper connecting member (2), and the lower ends of all the lower connecting rods (13) are gathered and connected to the lower connecting member (3).

4. The auxiliary device for atrial ablation therapy according to claim 3, characterized in that, The upper connector (2) is provided with a connecting structure (25) for connecting to a delivery system, which is used to deliver the auxiliary device into the atrium.

5. The auxiliary device for atrial ablation therapy according to claim 3, characterized in that, The grid unit (12) is a grid structure in which multiple links (121) are connected at multiple nodes (122) to form multiple grids (123). The maximum width of the links (121) and the nodes (122) does not exceed three-quarters of the diameter of the human vein opening (300) and / or the size of the grid (123) on the grid unit (12) covering the position of the human vein opening (300) is larger than the size of the human vein opening (300).

6. The auxiliary device for atrial ablation therapy according to claim 1, characterized in that, The supporting body (1) is integrally formed or woven from elastic memory material.

7. The auxiliary device for atrial ablation therapy according to claim 1, characterized in that, The supporting body (1) is a self-expanding structure or a balloon-assisted expansion structure.

8. The auxiliary device for atrial ablation therapy according to claim 1, characterized in that, The auxiliary device is made of biodegradable materials.

9. The auxiliary device for atrial ablation therapy according to claim 1, characterized in that, The support body (1) is provided with any one or more of the following: a positioning component (4), a fixing component (5), a potential detection component (6), and an electrode ablation component. The positioning component (4) is used to locate the implantation position of the auxiliary device in the atrium. The fixing component (5) is used to fix the end of the ablation guidewire (100) used in the atrial ablation treatment. The potential detection component (6) is used to monitor the electrical signal of the atrial wall. The electrode ablation component is used to perform ablation when the auxiliary device is attached to the atrial wall.

10. The auxiliary device for atrial ablation therapy according to claim 9, characterized in that, The potential detection component (6) and the electrode ablation component are an integrated unit with the combined functions of potential detection and electrode ablation.

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