An electrocoagulation device for occlusion of an aneurysm

Abstract

The present application relates to the technical field of medical devices, and specifically discloses an electrocoagulation device for aneurysm occlusion. The device comprises an electrocoagulation occlusion device sleeved in a microcatheter and a delivery assembly. The electrocoagulation occlusion device comprises a thrombus limiting part in a flat porous structure and an electrocoagulation conductive part in a porous mesh structure, and the two are fixed at the center to form a fixed rivet point. The electrocoagulation conductive part can form an electric circuit with an external power source through the rivet point. The delivery assembly is provided with an arc-shaped claw, which can release or bind the fixed rivet point by moving away from or close to the electrocoagulation conductive part. The device is simple to release, reduces the dependence of the operation on the experience of the doctor, and shortens the operation time. The porous mesh structure increases the blood contact area and improves the electrocoagulation efficiency. The thrombus limiting part can cover the aneurysm neck to prevent embolus escape and allow blood to enter the aneurysm cavity. The electrocoagulation occlusion device is completely placed in the aneurysm cavity and does not contact the aneurysm wall, so it has a wide range of applications. The mechanical release mode is convenient for the doctor to control the electrocoagulation time independently.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an electrocoagulation device for aneurysm occlusion. Background Technology

[0002] Currently, interventional treatment for intracranial aneurysms offers various options, including flow diverters, stent-assisted coil embolization, and some newer single-application occlusion devices. However, in certain special circumstances, these methods are not the optimal choice. For example, when small aneurysms are difficult to fit with coils, or even when microcatheters cannot reach them; when aneurysm embolization is not tight enough but the microcatheter has slipped out of the aneurysm cavity and cannot be re-entered; or when the patient's financial situation is poor and they cannot afford many expensive consumables. In these situations, electrocoagulation embolization at the target location is a good option.

[0003] Currently, there are no dedicated electrocoagulation thrombosed devices on the market, posing a high risk to doctors during clinical procedures. The guidewire used for electrocoagulation requires controlling the length of the exposed microcatheter to control the coagulation range, which results in poor controllability and a high risk of perioperative ischemic complications and recurrence. Summary of the Invention

[0004] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention proposes an electrocoagulation device for aneurysm occlusion.

[0005] The technical solution of the present invention is as follows: An electrocoagulation device for aneurysm occlusion, which is fitted inside a microcatheter, releases an electrocoagulation occluder after the microcatheter reaches the aneurysm cavity, wherein the electrocoagulation occluder comprises: The thrombus-limiting portion has a flat, porous structure; After the electrocoagulation conductive part is constrained and fixed at the center of the thrombus limiting part, a fixing rivet is formed. The electrocoagulation conductive part can form an electrical circuit with an external power source through the fixing rivet. The electrocoagulation conductive part is a porous mesh structure. The thrombus limiting part is not in contact with the fixing rivet point or is insulated from it; The electrocoagulation device also includes: The conveying assembly has an arc-shaped claw, which is configured to release or bind the fixing rivet when the conveying assembly is away from or near the electrocoagulation conductive part.

[0006] In one possible technical solution, the maximum outer diameter of the electrocoagulation conductive part is smaller than the maximum outer diameter of the thrombus limiting part, so that the electrocoagulation conductive part does not directly contact the aneurysm wall and does not need to be adapted to the shape of the aneurysm. Electrocoagulation is performed in the aneurysm cavity until the thrombus fills the entire aneurysm cavity, which has a wide range of applications.

[0007] In one possible technical solution, the skeleton structure of the electrocoagulation conductive part is further shaped as any one of sphere, ellipsoid, arch, or inverted cone, providing a skeleton for the thrombus to attach to, so that the thrombus can exist stably in the tumor cavity.

[0008] In one possible technical solution, the thrombus limiting part is further made of insulating material or coated with an insulating coating, and has an overall circular or disc-like mesh structure that can conform to the shape of the aneurysm neck and achieve coverage of the aneurysm neck.

[0009] In one possible technical solution, the thrombus limiting part is further made of a biodegradable polymer material. After the aneurysm embolization is completed, the thrombus limiting part can be gradually degraded and absorbed at the neck of the aneurysm, without having to remain permanently in the body. This can reduce the risk of inflammatory response and vascular endothelial hyperplasia caused by long-term foreign body retention, and will not interfere with subsequent angiography or other imaging examinations.

[0010] In one possible technical solution, the conveying component further includes: Multiple arc-shaped claws are aligned or circumferentially distributed to form a clamping space; Multiple connecting rods, corresponding to the arc-shaped claws; An inner support rod is connected to the end of each connecting rod away from the arc-shaped claw, wherein the spacing between the connecting rods gradually increases in a direction away from the inner support rod when not subjected to external pressure, at which time the clamping space allows the fixing rivet to disengage; The outer sleeve is fitted onto the inner support rod and can slide along the inner support rod to compress the connecting rod.

[0011] In one possible technical solution, the connecting rod is further shaped like an arc plate to fit the inner wall of the outer sleeve, facilitating smooth sliding of the outer sleeve.

[0012] In one possible technical solution, the mesh size of the thrombus limiting portion is further defined as 0.1 mm. 2 ~0.4mm 2 This allows blood to enter the tumor cavity for electrocoagulation, while preventing thrombi from escaping.

[0013] In one possible technical solution, the electrocoagulation conductive part further passes through the center of the thrombus limiting part and is connected to the fixing rivet point.

[0014] In one possible technical solution, the thrombus limiting part and the electrocoagulation conductive part are further described as a woven or cut mesh structure.

[0015] In one possible technical solution, when the skeleton structure of the electrocoagulation conductive part is inverted conical, the inverted conical structure is formed by a spiral of a woven or cut tubular structure, and one end of the tubular structure located at the cone point of the inverted conical structure forms a fixing rivet point with the center of the thrombus limiting part, and the outer extension of the tubular structure is spirally expanded as a whole.

[0016] In one possible technical solution, the electrocoagulation conductive part is further made of a metallic material, including nickel-titanium alloy, cobalt-chromium alloy, or stainless steel, which is conductive and has good biocompatibility.

[0017] In one possible technical solution, the fixing rivet point is further defined as spherical or cylindrical.

[0018] The electrocoagulation device for aneurysm occlusion according to the present invention has the following beneficial effects: 1. This invention enables controlled electrocoagulation thrombosis while limiting excessive thrombosis at the aneurysm neck or preventing thrombus escape from the aneurysm cavity to the parent artery, thus reducing the risk of ischemic complications. Furthermore, the device can be detached from the delivery system and remain within the aneurysm cavity after electrocoagulation, preventing thrombus displacement and providing scaffolding for subsequent thrombus organization and endothelial cell growth, thereby achieving aneurysm closure and healing.

[0019] 2. The electrocoagulation occluder is easy to release, which can reduce the reliance on the doctor's personal experience in aneurysm embolization during the operation and reduce the operation time.

[0020] 3. The electrocoagulation conductive part with a porous mesh structure can increase the contact area with blood and improve electrocoagulation efficiency.

[0021] 4. The thrombus containment part based on the porous mesh structure can not only cover the aneurysm neck, effectively preventing the escape of electrocoagulated emboli and reducing the occurrence of vascular infarction, but also allow blood to enter the aneurysm cavity to achieve electrocoagulation.

[0022] 5. The electrocoagulation occluder is located entirely within the aneurysm, so that the electrocoagulation conductive part does not directly contact the aneurysm wall and does not need to be adapted to the shape of the aneurysm. Electrocoagulation is performed within the aneurysm cavity until the thrombus fills the entire aneurysm cavity, making it widely applicable.

[0023] 6. The electrocoagulation occluder and delivery assembly can be mechanically detached. Before detachment, the fixing points of the electrocoagulation occluder and the delivery assembly are electrically conductive, allowing the doctor to control the electrocoagulation time independently, preventing insufficient or excessive electrocoagulation. Detachment is performed only after electrocoagulation is complete.

[0024] 7. The thrombus limiting part can preferably be made of biodegradable material, which gradually degrades as the endothelialization of the tumor neck progresses, so that the blood vessel of the tumor-bearing segment can regain its flexibility.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of an electrocoagulation device for aneurysm occlusion according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the electrocoagulation occluder of the electrocoagulation device for aneurysm occlusion according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the morphology of the electrocoagulation occluder of the electrocoagulation device for aneurysm occlusion according to an embodiment of the present invention within an aneurysm. Figure 4 This is a schematic diagram showing the connection between the electrocoagulation occluder and the delivery assembly of an electrocoagulation device for aneurysm occlusion according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of a second type of electrocoagulation occluder for aneurysm occlusion according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of a third type of electrocoagulation occluder for aneurysm occlusion according to an embodiment of the present invention.

[0028] Figure label: Thrombus limiting part 1, electrocoagulation conductive part 2, fixing rivet point 20, delivery assembly 3, arc claw 31, connecting rod 32, inner support rod 33, outer sleeve 34; Tumor wall 100. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0030] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The terms "first," "second," "third," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects and not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, it may include a series of steps or units, or optionally, steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0033] The accompanying drawings show only the portions relevant to this application, not all of them. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations may be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0034] The terms “component,” “module,” “system,” “unit,” etc., used in this specification are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, and / or distributed between two or more computers. Furthermore, these units can be executed from various computer-readable media on which various data structures are stored. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit between a local system, a distributed system, and / or a network; for example, the Internet interacting with other systems via signals).

[0035] Example 1 like Figures 1 to 4 As shown, this embodiment provides an electrocoagulation device for aneurysm occlusion, which is fitted inside a microcatheter. After the microcatheter reaches the aneurysm cavity, the electrocoagulation occluder of the electrocoagulation device is released. The electrocoagulation occluder includes: The thrombus limiting part 1 has a circular porous structure; The electrocoagulation conductive part 2, after being constrained and fixed at the center of the thrombus limiting part 1, forms a fixing point 20. The electrocoagulation conductive part 2 can form an electrical circuit with an external power source through the fixing point 20. The electrocoagulation conductive part 2 has a porous mesh structure, specifically an arched mesh tube woven from nickel-titanium wire. The two ends of the arched mesh tube pass through the central hole of the thrombus limiting part 1 and are bound and fixed to form a spherical fixing point 20. The arched structure of the electrocoagulation conductive part 2 can provide scaffolding for thrombus formation, stably supporting the electrocoagulated thrombus and ensuring the stable organization of the thrombus in the later stage. The biodegradable thrombus limiting part 1 can effectively prevent thrombus fragments from escaping from the aneurysm cavity. At the same time, its insulating properties can avoid electrocoagulation reactions near the aneurysm neck and avoid complications such as ischemia of the aneurysm-bearing artery caused by excessive electrocoagulation. The thrombus limiting part 1 is not in contact with or is insulated from the fixing rivet 20.

[0036] The electrocoagulation device also includes: The conveying assembly 3 has an arc-shaped claw 31, which is configured to release or bind the fixing rivet 20 when the conveying assembly 3 is away from or near the electrocoagulation conductive part 2.

[0037] It should be noted that in this embodiment, in the direction parallel to the aneurysm neck, the maximum outer diameter of the electrocoagulation conductive part 2 is smaller than the maximum outer diameter of the thrombus limiting part 1, so that the electrocoagulation conductive part 2 does not directly contact the aneurysm wall 100, nor does it need to be adapted to the shape of the aneurysm, and electrocoagulation is performed in the aneurysm cavity until the thrombus fills the entire aneurysm cavity. This has a wide range of applications. Specifically, the outer diameter of the electrocoagulation conductive part 2 should be smaller than the inner diameter of the aneurysm cavity to avoid direct contact with the aneurysm cavity, thereby avoiding direct stimulation of the aneurysm wall by the current.

[0038] It should be noted that the electrocoagulation conductive part 2 can also pass through the center of the thrombus limiting part 1 and be connected to the fixing rivet 20.

[0039] Furthermore, the thrombus limiting part 1 and the electrocoagulation conductive part 2 are woven or cut mesh structures.

[0040] It should be noted that, in this embodiment, the thrombus limiting part 1 is made of insulating material or coated with an insulating coating, and has a flat porous mesh structure, which can conform to the shape of the aneurysm neck and achieve coverage of the aneurysm neck.

[0041] Its flat, circular or disc-like mesh structure design, on the one hand, ensures effective coverage of the aneurysm neck while reducing pressure and irritation to the surrounding normal blood vessel walls; on the other hand, the mesh structure facilitates the accumulation of clotting factors and other components in the blood on its surface and within the mesh pores, promoting thrombus formation and thus better achieving aneurysm occlusion. This compliant coverage method can adapt to aneurysm necks of different sizes and shapes, improving the device's versatility and adaptability in clinical applications. Simultaneously, the properties of the insulating material fundamentally eliminate the possibility of conductivity at the thrombus limiting part during electrocoagulation, further ensuring the safety of the electrocoagulation operation and preventing unnecessary electrical damage to tissues near the aneurysm neck due to conductivity at the limiting part.

[0042] It should be noted that, in this embodiment, the conveying component 3 includes: Multiple arc-shaped claws 31 are aligned or circumferentially distributed to form a clamping space; Multiple connecting rods 32 are connected to the arc-shaped claws 31. The inner support rod 33 is connected to the end of each of the connecting rods 32 away from the arc-shaped claw 31, wherein the spacing of the connecting rods 32 gradually increases in a direction away from the inner support rod 33 when not subjected to external pressure, and the clamping space allows the fixing rivet 20 to disengage. The outer sleeve 34 is fitted onto the inner support rod 33 and can slide along the inner support rod 33 to compress the connecting rod 32.

[0043] It should be noted that in this embodiment, there are at least two arc-shaped claws 31.

[0044] It should be noted that in this embodiment, the connecting rod 32 is an arc-shaped plate, which fits the inner wall of the outer sleeve 34 to facilitate smooth sliding of the outer sleeve 34, and can also adapt to the shape of the fixed rivet. When the outer sleeve 34 moves along the inner support rod 33 towards the arc-shaped claw 31, its inner wall can evenly squeeze the arc-shaped connecting rod 32, causing the two connecting rods 32 to converge towards the inner support rod 33, thereby driving the aligned arc-shaped claws 31 to move closer to each other, reducing the clamping space and achieving stable clamping of the fixed rivet 20; when the outer sleeve 34 slides in the opposite direction and releases the pressure on the connecting rod 32, the distance between the connecting rods 32 gradually increases again in a direction deviating from the inner support rod 33 under the action of its own elastic restoring force, so that the clamping space returns to a state where the fixed rivet 20 can be dislodged, thereby meeting the requirements of the electrocoagulation device for gripping and releasing the fixed rivet 20 during use.

[0045] It should be noted that, in this embodiment, the mesh size of the thrombus limiting part 1 is 0.1 mm. 2 ~0.4mm 2This method ensures smooth blood flow, guaranteeing sufficient blood within the aneurysm cavity for coagulation during electrocoagulation to effectively thrombotically occlude the aneurysm. It also reliably acts as a physical barrier against thrombi, preventing existing thrombi from migrating through the mesh to the distal end of the blood vessel during or after the procedure, thus preventing serious complications such as embolism. This achieves a good balance between therapeutic efficacy and safety.

[0046] It should be noted that in this embodiment, the electrocoagulation conductive part 2 is made of a metallic material, including nickel-titanium alloy, cobalt-chromium alloy, or stainless steel. These materials offer good conductivity and biocompatibility, effectively reducing rejection reactions after implantation and ensuring patient safety during treatment. Nickel-titanium alloy, with its unique shape memory properties and superelasticity, maintains a stable structural morphology at different temperatures, ensuring accurate energy delivery of the electrocoagulation conductive part 2 even in the complex intracranial environment. Cobalt-chromium alloy possesses excellent strength and corrosion resistance, withstanding long-term degradation in bodily fluids and extending the device's lifespan. Stainless steel is relatively inexpensive and has good processing properties, allowing it to be shaped into various forms to meet the treatment requirements of different aneurysms. The selection of these metallic materials ensures both the conductivity of the electrocoagulation conductive part 2 and considers biosafety and clinical applicability.

[0047] It should be noted that, in this embodiment, the fixing rivet 20 is spherical or cylindrical.

[0048] It should be noted that, in this embodiment, the thrombus limiting part 1 is preferably made of a biodegradable polymer material. In this embodiment, the proximal end of the thrombus limiting part is cut from a biodegradable PDO (polydioxanone) disc. The PDO filaments can ensure the mechanical properties of the thrombus limiting part for about 12 months, ensuring that the aneurysm can heal. The cutting holes are arranged in a ring array with the center as the center point. They gradually degrade as the aneurysm neck endothelializes, allowing the blood vessel of the aneurysm segment to regain its flexibility.

[0049] The electrocoagulation device for aneurysm occlusion according to the present invention has the following beneficial effects: 1. The electrocoagulation occluder is easy to release, which can reduce the reliance on the doctor's personal experience in aneurysm embolization during the operation and reduce the operation time.

[0050] 2. The electrocoagulation conductive part with a porous mesh structure can increase the contact area with blood and improve electrocoagulation efficiency.

[0051] 3. The thrombus containment part based on the porous mesh structure can not only cover the aneurysm neck, effectively preventing the escape of electrocoagulated emboli and reducing the occurrence of vascular infarction, but also allow blood to enter the aneurysm cavity to achieve electrocoagulation.

[0052] 4. The electrocoagulation occluder is located entirely within the aneurysm, so that the electrocoagulation conductive part does not directly contact the aneurysm wall and does not need to be adapted to the shape of the aneurysm. Electrocoagulation is performed within the aneurysm cavity until the thrombus fills the entire aneurysm cavity, making it widely applicable.

[0053] 5. The electrocoagulation occluder and delivery assembly can be mechanically detached. Before detachment, the fixing rivets of the electrocoagulation occluder and the delivery assembly are conductive, allowing doctors to control the electrocoagulation time independently, preventing insufficient or excessive electrocoagulation.

[0054] Example 2 like Figure 5 As shown, this embodiment proposes an electrocoagulation device for aneurysm occlusion based on the above embodiments, wherein the electrocoagulation occluder includes: The thrombus limiting part 1 has a flat porous structure, specifically a porous sheet cut from biodegradable polylactic acid (PLA), with a central hole being a round hole and a hexagonal annular array of holes around it, which can effectively limit the escape of thrombi. After the electrocoagulation conductive part 2 is constrained and fixed at the center of the thrombus limiting part 1, a fixing rivet point 20 is formed. The electrocoagulation conductive part 2 can form an electrical circuit with an external power source through the fixing rivet point 20. The electrocoagulation conductive part 2 is a porous mesh structure, and its overall shape is a woven sphere or ellipsoid. The spherical structure of the electrocoagulation conductive part 2 has a larger surface area, which can produce higher electrocoagulation efficiency and can achieve a larger size range.

[0055] Example 3 like Figure 6 As shown, this embodiment proposes an electrocoagulation device for aneurysm occlusion based on the above embodiments, wherein the electrocoagulation occluder includes: The thrombus limiting part 1 has a flat porous structure, specifically a mesh woven from biodegradable polylactic acid-glycolic acid copolymer (PLGA) filaments, with a closed edge formed by the winding of the woven filaments on the outer edge and an opening in the center where the woven filament bundles are gathered. After the electrocoagulation conductive part 2 is constrained and fixed at the center of the thrombus limiting part 1, a fixing rivet point 20 is formed. The electrocoagulation conductive part 2 can form an electrical circuit with an external power source through the fixing rivet point 20. The electrocoagulation conductive part 2 is a pre-shaped inverted cone structure, which can be made of a mesh tube or wound by a spring.

[0056] It should be noted that, in this embodiment, when the skeleton structure of the electrocoagulation conductive part 2 is inverted conical, the inverted conical structure is formed by a spiral of a woven or cut tubular structure. One end of the tubular structure located at the cone point of the inverted conical structure forms a fixing rivet 20 with the center of the thrombus limiting part 1. The outer extension of the tubular structure is spirally expanded.

[0057] During the occlusion procedure, the electrocoagulation conductive part 2 unfolds within the aneurysm cavity, forming an inverted cone-shaped structure. As the entire electrocoagulation occluder structure is released, the thrombus restraint part 1 unfolds and covers the aneurysm neck. At this point, electrocoagulation can be initiated, and the thrombus will continue to form around the inverted cone-shaped electrocoagulation occluder until the entire aneurysm cavity is filled. The electrocoagulation conductive part 2 acts as a thrombus skeleton, while the thrombus restraint part 1 prevents the thrombus from escaping from the aneurysm cavity. After angiography confirms successful occlusion, the release procedure can be performed. The distal inverted cone-shaped electrocoagulation device offers greater flexibility and can adapt to a wider range of aneurysm shapes compared to the original design.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention.

[0059] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrocoagulation device for aneurysm occlusion, comprising an inner sleeve within a microcatheter, wherein the electrocoagulation occluder of the electrocoagulation device is released after the microcatheter reaches the aneurysm cavity, characterized in that, The electrocoagulation plugging device includes: The thrombus limiting part (1) has a flat porous structure; After the electrocoagulation conductive part (2) is constrained and fixed at the center of the thrombus limiting part (1), a fixing rivet (20) is formed. The electrocoagulation conductive part (2) can form an electrical circuit with an external power source through the fixing rivet (20). The electrocoagulation conductive part (2) is a porous mesh structure. The thrombus limiting part (1) is not in contact with or is insulated from the fixing rivet (20); The electrocoagulation device also includes: The conveying assembly (3) has an arc-shaped claw (31) which is configured to release or bind the fixing rivet (20) when the conveying assembly (3) is away from or near the electrocoagulation conductive part (2).

2. The electrocoagulation device for aneurysm occlusion according to claim 1, characterized in that, The maximum outer diameter of the electrocoagulation conductive part (2) is smaller than the maximum outer diameter of the thrombus limiting part (1).

3. The electrocoagulation device for aneurysm occlusion according to claim 2, characterized in that, The skeleton structure of the electrocoagulated conductive part (2) can be any one of spherical, ellipsoidal, arched, or inverted conical shapes.

4. The electrocoagulation device for aneurysm occlusion according to claim 3, characterized in that, When the skeleton structure of the electrocoagulation conductive part (2) is inverted cone shape, the inverted cone structure is formed by a spiral of a woven or cut tubular structure. One end of the tubular structure located at the cone point of the inverted cone structure forms a fixed rivet (20) with the center of the thrombus limiting part (1). The outer extension of the tubular structure is spirally expanded as a whole.

5. The electrocoagulation device for aneurysm occlusion according to claim 2, characterized in that, The thrombus limiting part (1) is made of insulating material or coated with an insulating coating, and has an overall circular or disc-shaped mesh structure.

6. The electrocoagulation device for aneurysm occlusion according to claim 5, characterized in that, The thrombus limiting part (1) is made of biodegradable polymer material.

7. The electrocoagulation device for aneurysm occlusion according to claim 1, characterized in that, The mesh size of the thrombus limiting part (1) is 0.1 mm. 2 ~0.4mm 2 ; and / or; The electrocoagulation conductive part (2) passes through the center of the thrombus limiting part (1) and is connected to the fixing rivet (20); and / or; The thrombus limiting part (1) and the electrocoagulation conductive part (2) are woven or cut mesh structures.

8. The electrocoagulation device for aneurysm occlusion according to claim 1, characterized in that, The conveying assembly (3) includes: Multiple arc-shaped claws (31) are aligned or circumferentially distributed to form a clamping space; Multiple connecting rods (32) are connected to the arc-shaped claws (31); The inner support rod (33) is connected to the end of each of the connecting rods (32) away from the arc claw (31), wherein the spacing of the connecting rods (32) gradually increases in a direction away from the inner support rod (33) when not subjected to external pressure, and the clamping space is available for the fixing rivet (20) to disengage; The outer sleeve (34) is fitted onto the inner support rod (33) and can slide along the inner support rod (33) to compress the connecting rod (32).

9. The electrocoagulation device for aneurysm occlusion according to claim 8, characterized in that, The connecting rod (32) is an arc-shaped plate to fit the inner wall of the outer sleeve (34).

10. The electrocoagulation device for aneurysm occlusion according to claim 1, characterized in that, The electrocoagulation conductive part (2) is made of a metallic material, including nickel-titanium alloy, cobalt-chromium alloy or stainless steel; and / or; The fixing rivet (20) is spherical or cylindrical.

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