An aneurysm embolization device and delivery system

Abstract

The present application relates to the field of aneurysm embolization devices, in particular to an aneurysm embolization device, comprising: a first embolization body comprising a support net and a first embolization wire connected to one end of the support net; a second embolization body comprising a sealing net and a second embolization wire connected to one end of the sealing net; the second embolization wire is slidably connected to the first embolization wire at the end away from the sealing net; a limiting ball is connected to the sealing net through a connecting wire; when the aneurysm embolization device is in an expanded state, the support net and the sealing net are both in a cover shape, and the limiting ball is located in the first space or the second space of the sealing net; the first embolization wire and the second embolization wire are elastically deformed and jointly form an embolization support body, and the embolization support body is used for filling the space between the support net and the sealing net. The present application also relates to a delivery system.

Description

Technical Field

[0001] This invention relates to the field of aneurysm embolization technology, and particularly to an aneurysm embolization device and delivery system. Background Technology

[0002] Aneurysms, a common and critical disease of the arterial vascular system, are characterized by abnormal bulging of the arterial wall, forming a sac-like structure. The pathological evolution of aneurysms is progressive; as the aneurysm cavity continues to expand, accompanied by stromal remodeling of the vessel wall, the aneurysm wall gradually thins, making it extremely prone to rupture in later stages.

[0003] Clinically, interventional treatment for aneurysms mainly falls into two technical routes: open surgery and endovascular interventional therapy. Traditional open surgery primarily employs microsurgical neck clipping. While this procedure can directly block blood flow within the aneurysm cavity to treat the lesion, it requires complex procedures such as craniotomy and microscopic dissection, resulting in significant surgical trauma and a long recovery period. This is especially true for elderly patients, who face a higher risk of secondary complications.

[0004] With technological advancements, endovascular interventional therapy has gradually become the mainstream treatment method. Current endovascular interventional therapy techniques mainly include coil embolization and related stent-assisted embolization techniques. While bare metal coils promote thrombus formation within the aneurysm cavity through three-dimensional packing to create a mechanical space, practical applications suffer from low packing efficiency and insufficient density. Particularly for complex, wide-necked aneurysms with large cavities, excessive coil placement is often required to achieve only incomplete embolization, which increases the risks of microcatheter blockage and coil displacement during the procedure. Summary of the Invention

[0005] To solve, or at least partially solve, the above-mentioned technical problems, the present invention provides an aneurysm embolization device and delivery system.

[0006] This invention provides an aneurysm embolization device, comprising a first embolization body, a second embolization body, and a limiting ball. The first embolization body includes a support mesh and a first embolization wire, with one end of the support mesh connected to one end of the first embolization wire. The second embolization body includes a sealing mesh and a second embolization wire, with one end of the sealing mesh connected to one end of the second embolization wire. The end of the second embolization wire away from the sealing mesh is slidably connected to the end of the first embolization wire away from the support mesh. The limiting ball is connected to the sealing mesh via a connecting wire.

[0007] When the aneurysm embolization device is in an expanded state, both the support net and the sealing net are in the shape of a cover, and the limiting ball is located in the first space or the second space of the sealing net; the first embolization wire and the second embolization wire undergo elastic deformation and together form an embolization support body, which is used to fill the space between the support net and the sealing net.

[0008] Optionally, the first plug wire has a first connecting ring at the end away from the support mesh, and the first connecting ring is sleeved on the second plug wire; the second plug wire has a second connecting ring at the end away from the sealing mesh, and the second connecting ring is sleeved on the first plug wire.

[0009] Optionally, a limiting ring is provided at the end of the first plug wire away from the support net, and the limiting ring is sleeved on the second plug wire; the other end of the second plug wire is provided with an anti-detachment ball, the diameter of which is larger than the inner diameter of the limiting ring.

[0010] Optionally, one end of each of the multiple second plug wires is connected to the sealing mesh, and the other end of each of the multiple second plug wires is provided with an anti-detachment ball. The limiting ring on the first plug wire is sleeved on the multiple second plug wires.

[0011] The lengths of the multiple second embolization wires decrease sequentially from the distal end to the proximal end.

[0012] Optionally, the first embolic wire has multiple bundles of fibers, and the multiple fibers are arranged at intervals along the length direction of the first embolic wire; and / or, the second embolic wire has multiple bundles of fibers, and the multiple fibers are arranged at intervals along the length direction of the second embolic wire.

[0013] Optionally, the second plug wire, which is spiral-shaped, is sleeved on the first plug wire.

[0014] Optionally, the second embolization wire, which is in the form of a variable diameter spiral, is sleeved on the first embolization wire; the diameter of the second embolization wire near its proximal end is smaller than the diameter of the second embolization wire near its distal end.

[0015] Optionally, the aneurysm embolization device further includes a first fixing ring, which is sleeved at the connection between the support mesh and the first embolization wire.

[0016] Optionally, the end of the support net away from the first fixing ring has a protective portion; when the aneurysm embolization device is in an expanded state, the edge of the cover-shaped support net bends toward the fourth space of the support net to form the protective portion.

[0017] Optionally, the aneurysm embolization device further includes a second fixing ring, which is sleeved at the connection between the sealing mesh and the second embolization wire.

[0018] Optionally, the end of the sealing mesh away from the second fixing ring has a protective portion; when the aneurysm embolization device is in an expanded state, the edge of the cover-shaped sealing mesh bends into the second space to form the protective portion.

[0019] Optionally, the support mesh and sealing mesh are both woven from multiple braided wires with a diameter of 0.02mm to 0.04mm.

[0020] The present invention provides a delivery system comprising a microcatheter, a push wire, and an aneurysm embolization device as described in any of the preceding claims. The microcatheter includes a lumen; the aneurysm embolization device is disposed within the lumen; one end of the push wire is provided with a limiting sleeve and is movably disposed within the lumen; the limiting sleeve is fitted onto the limiting ball.

[0021] The aneurysm embolization device disclosed in this embodiment has two states: a compressed state suitable for transporting the aneurysm embolization device, and an expanded state suitable for sealing the aneurysm. In this embodiment, the first embolization wire of the first embolization body and the second embolization wire of the second embolization body are slidably connected through the synergistic cooperation of the first connecting ring sleeved on the second embolization wire and the second embolization wire of the second embolization body, avoiding the risk of blockage of the microcatheter. Compared with existing spring coils, the aneurysm embolization device disclosed in this embodiment transports more wire of the same length, eliminating the need for multiple implantations of a large number of spring coils. The amount of wire transported by the aneurysm embolization device disclosed in this embodiment refers to the sum of the length of the first embolization wire and the length of the second embolization wire. This further increases the metal coverage of the embolization support of the aneurysm embolization device, thereby improving the embolization efficiency of the aneurysm embolization device for the aneurysm. Of course, the embolization support composed of double the amount of wire can further enhance the supporting force on the support mesh and sealing mesh, improve the stability of the aneurysm embolization device within the aneurysm, and reduce the risk of spring coil displacement. By combining a double-filament embolization support with a sealing mesh to seal the neck of the aneurysm, the embolization efficiency of the aneurysm embolization device can be improved. Attached Figure Description

[0022] To more clearly illustrate the embodiments of the present invention, the relevant accompanying drawings will be briefly described below. It should be understood that the drawings described below are only for illustrating some embodiments of the present invention, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0023] Figure 1 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in a compressed state. Figure 1 ;

[0024] Figure 2This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention, in which the support net and sealing net are in an expanded state;

[0025] Figure 3 This is an exploded schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state;

[0026] Figure 4 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 3 ;

[0029] Figure 7 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in a compressed state. Figure 2 ;

[0030] Figure 8 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 4 ;

[0031] Figure 9 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in a compressed state. Figure 3 ;

[0032] Figure 10 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 5 ;

[0033] Figure 11 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in an expanded state. Figure 6 ;

[0034] Figure 12 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in a compressed state. Figure 4 ;

[0035] Figure 13 This is a schematic diagram of an embodiment of the aneurysm embolization device of the present invention in a compressed state. Figure 5 ;

[0036] Figure 14 This is a schematic diagram of an embodiment of the fiber hairs of an aneurysm embolization device of the present invention;

[0037] Figure 15 This is a cross-sectional schematic diagram of an embodiment of a conveying system of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. First embolic body; 11. Support mesh; 12. First embolic wire; 13. First connecting ring; 14. First support part; 15. Second support part; 16. Third space; 17. Fourth space; 18. Limiting ring; 19. Protective part; 2. Second embolic body; 21. Sealing mesh; 22. Second embolic wire; 23. Second connecting ring; 24. First sealing part; 25. Second sealing part; 26. First space; 27. Second space; 28. Anti-detachment ball; 31. Limiting ball; 32. Connecting wire; 33. Fiber hair; 331. Fiber sub-hair; 34. Binding ring; 35. First fixing ring; 36. Second fixing ring; 4. Microcatheter; 41. Lumen; 51. Push wire; 52. Limiting sleeve; 53. Third fixing ring. Detailed Implementation

[0040] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0041] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0043] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0044] Unless otherwise stated, the term "multiple" means two or more, and "multiple groups" means two or more groups.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0046] In this invention, the distal end refers to the end that is far from the surgeon during surgery, and the proximal end refers to the end that is close to the surgeon during surgery.

[0047] In clinical practice, the applicant has found that using bare metal coils for embolization within aneurysm sacs results in low embolization efficiency and insufficient density. This is particularly true for complex, wide-necked aneurysms with large sac volumes, which typically require a large number of coils, thus increasing the risks of microcatheter occlusion and coil displacement during the procedure.

[0048] In view of the above, the inventors of this invention provide an aneurysm embolization device and delivery system to solve the aforementioned problems. Several specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] First Embodiment

[0050] The aneurysm embolization device mentioned in this embodiment, such as Figure 1As shown, the aneurysm embolization device includes a first embolization body 1, a second embolization body 2, and a limiting ball 31. To facilitate the description of the structure of the aneurysm embolization device disclosed in this embodiment, the device is described in a compressed state as an example. The first embolization body includes a support mesh 11 and a first embolization wire 12. The support mesh 11 is a tubular structure woven from multiple braided filaments, and the diameter of the braided filaments ranges from 0.02 mm to 0.04 mm. The distal end of the support mesh 11 is fixedly connected to the distal end of the first embolization wire 12, and the distal end of the first embolization wire 12 is located within the support mesh 11. For example, the support mesh 11 and the first embolization wire 12 can be connected by laser welding. A first connecting ring 13 with a circular structure is wound around the proximal end of the first embolization wire 12.

[0051] like Figure 1 As shown, the second embolic body 2 includes a sealing mesh 21 and a second embolic wire 22. The sealing mesh 21 is a mesh-like structure woven from multiple braided wires, and the diameter of the braided wires ranges from 0.02 mm to 0.04 mm. The end of the sealing mesh 21 near the distal end is fixedly connected to the end of the second embolic wire 22 near the proximal end. For example, the sealing mesh 21 and the second embolic wire 22 can be connected by laser welding. The end of the second embolic wire 22 near the distal end is first threaded with a first connecting ring 13, and then the end of the second embolic wire 22 near the distal end is wrapped around the first embolic wire 12 with a second connecting ring 23 in a circular structure, which can be regarded as the second connecting ring 23 being sleeved on the first embolic wire 12. One end of the connecting wire 32 is connected to the end of the sealing mesh 21 near the distal end, and the other end of the connecting wire 32 is connected to a limiting ball 31. Both the connecting wire 32 and the limiting ball 31 are located outside the sealing mesh 21.

[0052] Optionally, in this embodiment, the braiding wire is made of nickel-titanium alloy wire or platinum-iridium alloy wire.

[0053] Optionally, the limiting ball 31 can be made of a developing material. In this invention, the developing material can be any one of platinum-iridium alloy, platinum-tungsten alloy, or tantalum alloy.

[0054] The aneurysm embolization device disclosed in this embodiment has three different structures in the inflated state, as detailed below:

[0055] Optional, such as Figures 1 to 4As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 undergoes elastic deformation, the limiting ball 31, located in the first space 26, passes through the mesh of the first sealing part 24 and enters the second space. Regarding the elastic deformation of the first plugging wire 12 and the second plugging wire 22, the second connecting ring 23 of the second plugging wire 22 is located at the connection between the first plugging wire 12 and the support mesh 11, while the first connecting ring 13 of the first plugging wire 12 is located at the connection between the second plugging wire 22 and the sealing mesh 21. The first plugging wire 12 and the second plugging wire 22 begin to undergo elastic deformation, and together they form an embolization support body. This embolization support body is located between the support mesh 11 and the sealing mesh 21, and it fills the space between the support mesh 11 and the sealing mesh 21. By using the embolization support to simultaneously support the support net 11 and the sealing net 21, the aneurysm embolization device can simultaneously support the aneurysm top and the aneurysm neck, increasing the stability of the aneurysm embolization device within the aneurysm.Furthermore, the metal coverage of the aneurysm embolization device can be further increased through the synergistic cooperation of the first embolization wire 12 and the second embolization wire 22, thereby further improving the embolization effect on the aneurysm.

[0056] Optional, such as Figures 1 to 3 , Figure 5As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 elastically deforms, the limiting ball 31, located in the first space 26, passes through the mesh of the first sealing part 24 and enters the second space. With the elastic deformation of the first plug wire 12 and the second plug wire 22, the distance between the first connecting ring 13 of the first plug wire 12 and the second connecting ring 23 of the second plug wire 22 gradually decreases until the first connecting ring 13 and the second connecting ring 23 come into contact. A portion of the elastically deformed first plug wire 12 fills the fourth space 17 of the support mesh 11, and a portion of the elastically deformed second plug wire 22 fills the second space of the sealing mesh 21. Simultaneously, the elastically deformed first plug wire 12 and the second plug wire 22 together form a plug support body, located between the support mesh 11 and the sealing mesh 21, and used to fill the space between the support mesh 11 and the sealing mesh 21. By using the embolization support to simultaneously support the support net 11 and the sealing net 21, the stability of the aneurysm embolization device located within the aneurysm can be further increased.The second embolization wire 22 can also be squeezed by the first embolization wire 12, so that the second embolization wire 22 is squeezed into the second space of the sealing mesh 21. The cooperation between the second embolization wire 22 and the sealing mesh 21 further increases the embolization effect on the neck of the aneurysm.

[0057] Optional, such as Figures 1 to 3 , Figure 6As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 elastically deforms, the limiting ball 31, located in the first space 26, passes through the mesh of the first sealing part 24 and enters the second space. With the elastic deformation of the first plug wire 12 and the second plug wire 22, the distance between the first connecting ring 13 of the first plug wire 12 and the second connecting ring 23 of the second plug wire 22 gradually decreases until the first connecting ring 13 and the second connecting ring 23 come into contact. The elastically deformed second plug wire 22 forms a variable-diameter spiral structure. The smaller diameter end of the second plug wire 22 enters the second space of the sealing mesh 21 and connects with the first sealing part 24 of the sealing mesh 21. The larger diameter end of the second plug wire 22 is located between the support mesh 11 and the sealing mesh 21. A portion of the first plug wire 12 that undergoes elastic deformation is used to fill the fourth space 17 of the support net 11, and another portion of the first plug wire 12 is used to fill the internal space of the second plug wire 22, which has a variable diameter spiral structure.The stability of the aneurysm embolization device within the aneurysm can be further increased by placing the first embolization wire 12 within the second embolization wire 22.

[0058] You may choose any one of the three technical solutions mentioned above.

[0059] The aneurysm embolization device disclosed in this embodiment has two states: a compressed state suitable for transporting the aneurysm embolization device, and an expanded state suitable for sealing the aneurysm. In this embodiment, through the coordinated cooperation of the first connecting ring 13 sleeved on the second embolization wire 22 and the second connecting ring 23 sleeved on the first embolization wire 12, a sliding connection is achieved between the first embolization wire 12 of the first embolization body 1 and the second embolization wire 22 of the second embolization body 2, avoiding the risk of blockage of the microcatheter 4. Compared with existing spring coils, the aneurysm embolization device disclosed in this embodiment transports more wire of the same length, eliminating the need for multiple implantations of a large number of spring coils. The amount of wire transported by the aneurysm embolization device disclosed in this embodiment refers to the length of the first embolization wire 12 plus the length of the second embolization wire 22. This further increases the metal coverage of the embolization support of the aneurysm embolization device, thereby improving the embolization efficiency of the aneurysm embolization device. Of course, the embolization support body composed of double the amount of filament can further enhance the supporting force on the support net 11 and the sealing net 21, improve the stability of the aneurysm embolization device within the aneurysm, and reduce the risk of coil displacement. By using the embolization support body with double the amount of filament and the sealing net 21 to seal the aneurysm neck, the embolization efficiency of the aneurysm embolization device can be improved.

[0060] Second Embodiment

[0061] This embodiment also proposes an aneurysm embolization device. The second embodiment is a parallel technical solution to the first embodiment. The difference between the second embodiment and the first embodiment is:

[0062] Optional, such as Figure 7 , Figure 8As shown, to facilitate the description of the structure of the aneurysm embolization device disclosed in this embodiment, the description is based on the aneurysm embolization device in a compressed state. A circular retaining ring 18 is wound around the proximal end of the first embolization wire 12. The retaining ring 18 is first passed through the distal end of the second embolization wire 22. Then, an anti-detachment ball 28 is set at the distal end of the second embolization wire 22. The diameter of the anti-detachment ball 28 is larger than the inner diameter of the retaining ring 18, thus achieving the retaining ring 18 being fitted onto the second embolization wire 22. For example, the anti-detachment ball 28 and the second embolization wire 22 can be connected by laser welding. The larger diameter of the anti-detachment ball 28 than the inner diameter of the retaining ring 18 prevents the first embolization body 1 and the second embolization body 2 from disintegrating. The specific structure of the aneurysm embolization device in the expanded state is as follows:

[0063] like Figure 2 , Figure 7 , Figure 8As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 elastically deforms, the limiting ball 31, located in the first space 26, passes through the mesh of the first sealing part 24 and enters the second space. The limiting ring 18 of the first plug wire 12 is located at the connection between the second plug wire 22 and the sealing mesh 21. An anti-detachment ball 28 is provided at the distal end of the second plug wire 22. Through the coordinated action of the limiting ring 18 of the first plug wire 12 and the anti-detachment ball 28 of the second plug wire 22, a sliding connection is achieved. This not only prevents the risk of disintegration between the first plug body 1 and the second plug body 2, but also increases the flexibility of the second plug wire 22 by releasing the end of the second plug wire 22 with the anti-detachment ball 28, facilitating the elastic deformation of the second plug wire 22. Compared with the first embodiment, due to the absence of the constraint of the second connecting ring 23, the embolization support body composed of the second embolization wire 22 and the first embolization wire 12 in this technical solution has a stronger supporting force on the support net 11 and the sealing net 21, further increasing the stability of the aneurysm embolization device located in the aneurysm.Furthermore, the metal coverage of the aneurysm embolization device can be further increased through the synergistic cooperation of the first embolization wire 12 and the second embolization wire 22, thereby further improving the embolization effect on the aneurysm.

[0064] Optional, such as Figure 9 , Figure 10 As shown, the difference from the above technical solution lies in that, at the proximal end of the first embolization wire 12, a limiting ring 18 with a circular structure is wound around it, and at the distal end of the second embolization wire 22, the limiting ring 18 is first passed through the second embolization wire 22, and then the second embolization wire 22 is wound around the first embolization wire 12 in a spiral structure, that is, the spiral-structured second embolization wire 22 is sleeved on the first embolization wire 12. Then, an anti-dislodgement ball 28 is set at the distal end of the second embolization wire 22. The diameter of the anti-dislodgement ball 28 is larger than the inner diameter of the limiting ring 18, thus also achieving the purpose of the limiting ring 18 being sleeved on the second embolization wire 22. The specific structure of the aneurysm embolization device in the inflated state of this technical solution is as follows:

[0065] like Figure 2 , Figure 9 , Figure 10As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 elastically deforms, the limiting ball 31 within the first space 26 passes through the mesh of the first sealing part 24 and enters the second space. Compared to the first embodiment, due to the absence of the constraint of the second connecting ring 23, the limiting ring 18 of the first plug wire 12 is located at the connection between the second plug wire 22 and the sealing mesh 21. An anti-detachment ball 28 is provided at the distal end of the second plug wire 22. Through the coordinated cooperation of the limiting ring 18 of the first plug wire 12 and the anti-detachment ball 28 of the second plug wire 22, a sliding connection between the two is achieved. After elastic deformation, the second plug wire 22 has a spiral structure. The length of the second plug wire 22 in the expanded state is less than the length of the second plug wire 22 in the compressed state, and the outer diameter of the second plug wire 22 in the expanded state is greater than the outer diameter of the second plug wire 22 in the compressed state.This not only prevents the risk of disintegration between the first embolic body 1 and the second embolic body 2, but also, by releasing the end of the second embolic wire 22 equipped with the anti-detachment ball 28, the first embolic wire 12 fills the internal space of the spiral-shaped second embolic wire 22. This makes the embolic support body composed of the second embolic wire 22 and the first embolic wire 12 provide stronger support for the support net 11 and the sealing net 21, further increasing the stability of the aneurysm embolization device within the aneurysm. Furthermore, the synergistic cooperation between the first embolic wire 12 and the second embolic wire 22 can further increase the metal coverage of the aneurysm embolization device, thereby further improving the embolization effect on the aneurysm.

[0066] Optional, such as Figure 9 , Figure 11 As shown, the difference from the above technical solution lies in that, at the proximal end of the first embolization wire 12, a limiting ring 18 with a circular structure is wound around it, and at the distal end of the second embolization wire 22, the limiting ring 18 is first passed through it. Then, the second embolization wire 22 is wound around the first embolization wire 12 in a variable-diameter spiral structure, i.e., the variable-diameter spiral structure of the second embolization wire 22 is sleeved on the first embolization wire 12. The diameter of the proximal end of the second embolization wire 22 is smaller than the diameter of the distal end. Then, an anti-dislodgement ball 28 is set at the distal end of the second embolization wire 22. The diameter of the anti-dislodgement ball 28 is larger than the inner diameter of the limiting ring 18, thus also achieving the purpose of the limiting ring 18 being sleeved on the second embolization wire 22. The specific structure of the aneurysm embolization device in the inflated state of this technical solution is as follows:

[0067] like Figure 2 , Figure 9 , Figure 11As shown, the support net 11, after expansion, has a dome-like structure. When the support net 11 is in this dome-like structure, its central portion is concave, dividing it into two parts: the concave portion forms the first support part 14, and the remaining portion forms the second support part 15, with the first support part 14 located within the second support part 15. The internal space of the first support part 14 is the third space 16, and the internal space of the second support part 15 is the fourth space 17. From the proximal end to the distal end, the cross-sectional area of ​​the first support part 14 gradually increases, while the cross-sectional area of ​​the second support part 15 gradually decreases. One end of the first support part 14, located within the fourth space 17 of the second support part 15, is connected to the distal end of the first embolization wire 12. By designing the central portion of the support net 11 to form the first support part 14, the structural strength of the support net 11 is improved, and its support force on the aneurysm dome is strengthened. After expansion, the sealing mesh 21 also takes on a dome-like structure. When the sealing mesh 21 is in this dome-like structure, its center is concave, dividing it into two parts: the concave part is the first sealing portion 24, and the remaining part is the second sealing portion 25, meaning the first sealing portion 24 is located within the second sealing portion 25. The internal space of the first sealing portion 24 is the first space 26, and the internal space of the second sealing portion 25 is the second space 27. From the proximal end to the distal end, the cross-sectional area of ​​the first sealing portion 24 gradually decreases, while the cross-sectional area of ​​the second sealing portion 25 gradually increases. One end of the first sealing portion 24, located within the second space of the second sealing portion 25, is connected to the proximal end of the second plug wire 22. By designing the first sealing portion 24 to be formed by the concave center of the sealing mesh 21, the structural strength of the sealing mesh 21 is improved, facilitating its support and sealing of the nozzle opening. The connecting wire 32 undergoes elastic deformation, causing the limiting ball 31 to be positioned within the first space 26 of the sealing mesh 21. Naturally, as the connecting wire 32 undergoes elastic deformation, the limiting ball 31 located in the first space 26 passes through the mesh of the first sealing part 24 and enters the second space. Compared to the first embodiment, due to the absence of the constraint of the second connecting ring 23, the limiting ring 18 of the first plug wire 12 contacts the anti-detachment ball 28 of the second plug wire 22. Through the cooperative cooperation of the limiting ring 18 of the first plug wire 12 and the anti-detachment ball 28 of the second plug wire 22, a sliding connection between the two is achieved. After elastic deformation, the second plug wire 22 has a variable diameter spiral structure. The diameter of the second plug wire 22 near its proximal end is smaller than the diameter of the second plug wire 22 near its distal end. The length of the second plug wire 22 in the expanded state is smaller than the length of the second plug wire 22 in the compressed state, and the outer diameter of the second plug wire 22 in the expanded state is larger than the outer diameter of the second plug wire 22 in the compressed state.This not only prevents the risk of disintegration between the first embolic body 1 and the second embolic body 2, but also, by releasing the end of the second embolic wire 22 equipped with the anti-detachment ball 28, the internal space of the second embolic wire 22, which has a variable diameter spiral structure, is filled by the first embolic wire 12. This makes the embolic support body composed of the second embolic wire 22 and the first embolic wire 12 provide stronger support for the support net 11 and the sealing net 21, further increasing the stability of the aneurysm embolization device within the aneurysm. Furthermore, the synergistic cooperation between the first embolic wire 12 and the second embolic wire 22 can further increase the metal coverage of the aneurysm embolization device, thereby further improving the embolization effect on the aneurysm.

[0068] Optional, such as Figure 12 As shown, the difference from the above technical solution lies in that there is only one first embolization wire 12, and a retaining ring 18 with a circular structure is wound around the proximal end of this first embolization wire 12. There are multiple second embolization wires 22, with the length of the multiple second embolization wires 22 decreasing sequentially from the distal end to the proximal end. This arrangement facilitates the delivery of the aneurysm embolization device within the microcatheter 4. The proximal ends of the multiple second embolization wires 22 are all connected to the sealing mesh 21, and the distal ends of the multiple second embolization wires 22 are all threaded through the retaining ring 18 of the first embolization wire 12. Then, an anti-dislodgement ball 28 is set at the distal end of each second embolization wire 22. The diameter of the anti-dislodgement ball 28 is larger than the inner diameter of the retaining ring 18, thus also achieving the retention ring 18 being fitted onto the multiple second embolization wires 22. In this technical solution, by fitting the first connecting ring 13 onto multiple second embolization wires 22, a sliding connection is achieved between the first embolization wire 12 of the first embolization body 1 and the multiple second embolization wires 22 of the second embolization body 2, avoiding the risk of blockage to the microcatheter 4. Compared with existing spring coils, the aneurysm embolization device disclosed in this embodiment transports more wires of the same length, eliminating the need for multiple implantations of a large number of spring coils. The amount of wire transported by the aneurysm embolization device disclosed in this embodiment refers to the length of the first embolization wire 12 plus the length of the multiple second embolization wires 22. This further increases the metal coverage of the embolization support of the aneurysm embolization device, thereby improving the embolization efficiency of the aneurysm embolization device for the aneurysm. Of course, the embolization support composed of multiple second embolization wires 22 and the first embolization wire 12 can further enhance the supporting force on the support net 11 and the sealing net 21, improve the stability of the aneurysm embolization device within the aneurysm, and reduce the risk of spring coil displacement.

[0069] You may choose any one of the four technical solutions mentioned above.

[0070] Third Embodiment

[0071] This embodiment also proposes an aneurysm embolization device. The third embodiment is a further improvement based on the first or second embodiment, with the main improvement being:

[0072] Optional, such as Figure 13 As shown, the first embolic wire 12 is provided with multiple bundles of fibers 33, which are arranged sequentially and at intervals along the length of the first embolic wire 12. Since the multiple bundles of fibers 33 are arranged in the same way on the first embolic wire 12, the connection of one bundle of fibers 33 to the first embolic wire 12 is described as an example. One end of one bundle of fibers 33 is placed on the first embolic wire 12, and a binding ring 34 is fitted onto the first embolic wire 12, with one end of the bundle of fibers 33 located inside the binding ring 34. The bundle of fibers 33 is fixed to the first embolic wire 12 by squeezing the binding ring 34, or by bonding the bundle of fibers 33 and the binding ring 34 to the first embolic wire 12. The binding ring 34 can be made of a developing material.

[0073] Optional, such as Figure 8 , Figure 10 As shown, the second embolic wire 22 is provided with multiple bundles of fibers 33, which are arranged at intervals along the length of the second embolic wire 22. Since the multiple bundles of fibers 33 are arranged in the same way on the second embolic wire 22, the connection of one bundle of fibers 33 to the second embolic wire 22 is described as an example. One end of one bundle of fibers 33 is placed on the second embolic wire 22, and a binding ring 34 is fitted onto the second embolic wire 22, with one end of the bundle of fibers 33 located inside the binding ring 34. The bundle of fibers 33 is fixed to the second embolic wire 22 by compressing the binding ring 34, or by bonding the bundle of fibers 33 and the binding ring 34 to the second embolic wire 22. The binding ring 34 can be made of a developing material.

[0074] Optionally, the two alternative technical solutions mentioned above can be combined.

[0075] Optional, such as Figure 14 As shown, based on the three optional technical solutions mentioned above, the structure of the fiber hair 33 is further improved by dividing a bundle of fiber hair 33 into two bundles of fiber sub-hairs 331, with an included angle α between the two bundles of fiber sub-hairs 331, the value of which is in the range of 15° to 60°. By dividing a bundle of fiber hair 33 into two bundles of fiber sub-hairs 331, and utilizing the synergistic cooperation of multiple bundles of fiber sub-hairs 331 with the first embolization wire 12 and the second embolization wire 22, the embolization efficiency of the aneurysm is further accelerated.

[0076] You may choose any one of the four technical solutions mentioned above.

[0077] In this embodiment, the aneurysm embolization device in the compressed state occupies little space within the lumen 41 of the microcatheter 4. Even with fibers 33 on the first embolization wire 12 or the second embolization wire 22, the aneurysm embolization device disclosed in this embodiment is still easily transported within the microcatheter 4. The increased embolization density of the aneurysm embolization device in the expanded state is due to the fibers 33 filling the gaps or internal spaces of the embolization support.

[0078] Fourth embodiment

[0079] This embodiment also proposes an aneurysm embolization device. The fourth embodiment is a further improvement based on any one of the first to third embodiments, with the main improvement being:

[0080] Optional, such as Figure 1 , Figure 2 As shown, the aneurysm embolization device also includes a first fixing ring 35. When the aneurysm embolization device is in a compressed state, the first fixing ring 35 is fitted onto the connection between the support net 11 and the first embolization wire 12, and the first fixing ring 35 is located within the support net 11. When the aneurysm embolization device is in an inflated state, both the first fixing ring 35 and the connection between the support net 11 and the first embolization wire 12 are located within the fourth space 17 of the support net 11. By fitting the first fixing ring 35 onto the connection between the support net 11 and the first embolization wire 12, the structural strength of the connection between the support net 11 and the first embolization wire 12 can be further enhanced. Optionally, the first fixing ring 35 can be made of a radiopaque material, which facilitates the operator's observation of the position of the first fixing ring 35 during angiography.

[0081] Optional, such as Figure 1 , Figure 2 As shown, the aneurysm embolization device also includes a second fixing ring 36. When the aneurysm embolization device is in a compressed state, the second fixing ring 36 is fitted onto the connection between the sealing mesh 21 and the second embolization wire 22, and the second fixing ring 36 is located within the sealing mesh 21. When the aneurysm embolization device is in an inflated state, both the second fixing ring 36 and the connection between the sealing mesh 21 and the second embolization wire 22 are located within the second space of the sealing mesh 21. By fitting the second fixing ring 36 onto the connection between the sealing mesh 21 and the second embolization wire 22, the structural strength of the connection between the sealing mesh 21 and the second embolization wire 22 can be further enhanced. Optionally, the second fixing ring 36 can be made of a radiopaque material, which facilitates the operator's observation of the position of the second fixing ring 36 during angiography.

[0082] Optionally, the two alternative technical solutions mentioned above can be combined.

[0083] You may choose any one of the three technical solutions mentioned above.

[0084] Fifth embodiment

[0085] This embodiment also proposes an aneurysm embolization device. The fifth embodiment is a further improvement on any of the first to fourth embodiments, with the main improvement being:

[0086] Optional, such as Figure 1 , Figure 2 As shown, when the aneurysm embolization device is in a compressed state, a protective portion 19 is provided at the end of the support net 11 away from the first fixing ring 35. When the aneurysm embolization device is in an expanded state, the edge of the second support portion 15 away from the first support portion 14 bends into the fourth space 17 of the support net 11 to form the protective portion 19. That is, it can be regarded as the edge of the cover-shaped support net 11 bending into the fourth space 17 of the support net 11 to form the protective portion 19. By providing the protective portion 19 on the support net 11, damage to the inner wall of the aneurysm can be prevented when the support net 11 is released.

[0087] Optional, such as Figure 1 , Figure 2 As shown, when the aneurysm embolization device is in a compressed state, a protective portion 19 is provided at the end of the sealing net 21 away from the second fixing ring 36. When the aneurysm embolization device is in an inflated state, the edge of the second sealing portion 25 away from the first sealing portion 24 bends into the second space of the sealing net 21 to form the protective portion 19. That is, it can be regarded as the edge of the cover-shaped sealing net 21 bending into the second space of the sealing net 21 to form the protective portion 19. By providing the protective portion 19 on the sealing net 21, damage to the inner wall of the aneurysm can be prevented when the sealing net 21 is released.

[0088] Optionally, the two alternative technical solutions mentioned above can be combined.

[0089] You may choose any one of the three technical solutions mentioned above.

[0090] Sixth Embodiment

[0091] The conveying system mentioned in this embodiment, such as Figure 1 , Figure 15 As shown, the delivery system includes a microcatheter 4, a push wire 51, and an aneurysm embolization device disclosed in any of the first to fifth embodiments. The microcatheter 4 has a lumen 41 inside. One end of the push wire 51 is provided with a limiting sleeve 52, which is disposed at the distal end of the push wire 51 by a third fixing ring 53 and is movably disposed within the lumen 41 of the microcatheter 4. In use, the aneurysm embolization device is disposed within the lumen 41 of the microcatheter 4, and the limiting sleeve 52 at one end of the push wire 51 is sleeved on the limiting ball 31 of the aneurysm embolization device.

[0092] An exemplary embodiment of the application scenario:

[0093] like Figures 1 to 4 , Figure 15 As shown, the aneurysm embolization device and the pusher wire 51 are placed inside the microcatheter 4, and the limiting sleeve 52 of the pusher wire 51 is fitted onto the limiting ball 31, with the distal end of the limiting sleeve 52 abutting against the second fixing ring 36. When the microcatheter 4 enters the blood vessel, the distal end of the microcatheter 4 enters the aneurysm first, and the end of the pusher wire 51 with the limiting sleeve 52 moves distally. The support net 11 is the first to lose the restriction of the microcatheter 4 and begins to expand. After expansion, the support net 11 forms a dome-like structure, which supports the top of the aneurysm. Then, the end of the pusher wire 51 with the limiting sleeve 52 continues to move distally, and the first embolization wire 12 and the second embolization wire 22 simultaneously lose the restriction of the microcatheter 4 and begin to undergo elastic deformation. As the first embolization wire 12 and the second embolization wire 22 begin to elastically deform, the end of the pusher wire 51 with the limiting sleeve 52 continues to move distally. The sealing mesh 21 loses the constraint of the microcatheter 4 and begins to expand, forming a dome-like structure that seals the neck of the aneurysm. While the sealing mesh 21 seals the neck of the aneurysm, the first embolization wire 12 and the second embolization wire 22, after expansion, together form an embolization support, which supports the space between the support mesh 11 and the sealing mesh 21. Simultaneously, the embolization support is used to embolize the aneurysm. Finally, the push wire 51 is positioned at one end of the limiting sleeve 52 and continues to move distally. The limiting sleeve 52 drives the limiting ball 31 to the neck of the aneurysm, driving the push wire 51 to move the limiting sleeve 52 proximally. The limiting ball 31 is freed from the restraint of the microcatheter 4 and the limiting sleeve 52. With the elastic deformation of the connecting wire 32, the limiting ball 31 enters the mesh of the first sealing part 24 and enters the second space.

[0094] The foregoing description and accompanying drawings fully illustrate embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Some portions and features of some embodiments may be included or substituted for portions and features of other embodiments. Embodiments of the invention are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from their scope. The scope of the invention is limited only by the appended claims.

Claims

1. An aneurysm embolization device, characterized in that, include: The first embolic body includes a support mesh and a first embolic wire connected to one end of the support mesh; The second embolic body includes a sealing mesh and a second embolic wire connected to one end of the sealing mesh; The end of the second plug wire away from the sealing mesh is slidably connected to the end of the first plug wire away from the support mesh; The limiting ball is connected to the sealing mesh via a connecting wire; When the aneurysm embolization device is in an expanded state, both the support net and the sealing net are in the shape of a cover, and the limiting ball is located in the first space or the second space of the sealing net; the first embolization wire and the second embolization wire undergo elastic deformation and together form an embolization support body, which is used to fill the space between the support net and the sealing net.

2. The aneurysm embolization device according to claim 1, characterized in that, The first plug wire has a first connecting ring at the end away from the support mesh, and the first connecting ring is sleeved on the second plug wire; The second plug wire has a second connecting ring at the end away from the sealing mesh, and the second connecting ring is sleeved on the first plug wire.

3. The aneurysm embolization device according to claim 1, characterized in that, The first plug wire has a limiting ring at the end away from the support mesh, and the limiting ring is sleeved on the second plug wire; The other end of the second plug wire is provided with an anti-detachment ball, the diameter of which is larger than the inner diameter of the limiting ring.

4. The aneurysm embolization device according to claim 3, characterized in that, One end of each of the multiple second plug wires is connected to the sealing mesh, and the other end of each of the multiple second plug wires is provided with an anti-detachment ball. The limiting ring on the first plug wire is sleeved on the multiple second plug wires. The lengths of the multiple second embolization wires decrease sequentially from the distal end to the proximal end.

5. The aneurysm embolization device according to any one of claims 1 to 4, characterized in that, The first plug wire has multiple bundles of fibers, and the multiple fibers are arranged at intervals along the length of the first plug wire; and / or, The second plug wire has multiple bundles of fibers, and the multiple fibers are arranged at intervals along the length direction of the second plug wire.

6. The aneurysm embolization device according to claim 1, characterized in that, The second plug wire, which is spiral-shaped, is sleeved on the first plug wire.

7. The aneurysm embolization device according to claim 1, characterized in that, The second embolization wire, which is in the shape of a variable diameter spiral, is sleeved on the first embolization wire; the diameter of the second embolization wire near its proximal end is smaller than the diameter of the second embolization wire near its distal end.

8. The aneurysm embolization device according to claim 1, characterized in that, Also includes: The first fixing ring is sleeved at the connection between the support net and the first plug wire.

9. The aneurysm embolization device according to claim 8, characterized in that, The end of the support net away from the first fixing ring has a protective section; When the aneurysm embolization device is in an expanded state, the edge of the cover-shaped support net bends toward the fourth space of the support net to form the protective part.

10. The aneurysm embolization device according to claim 1, characterized in that, Also includes: The second fixing ring is fitted at the connection between the sealing mesh and the second plug wire.

11. The aneurysm embolization device according to claim 10, characterized in that, The end of the sealing mesh away from the second fixing ring has a protective part; When the aneurysm embolization device is in an expanded state, the edge of the hood-shaped sealing mesh bends into the second space to form the protective part.

12. The aneurysm embolization device according to claim 1, characterized in that, Both the support mesh and the sealing mesh are woven from multiple braided wires with a diameter of 0.02mm to 0.04mm.

13. A conveying system, characterized in that, include: Microcatheters, including lumens; The aneurysm embolization device as described in any one of claims 1 to 12 is disposed within the lumen; The push wire has a limiting sleeve at one end and is movably disposed within the cavity; The limiting sleeve is fitted onto the limiting ball.

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