Aneurysm embolism device

Abstract

The utility model relates to an aneurysm embolism device which comprises a far-end embolism ring and a near-end spiral net connected with the far-end embolism ring. After being released into the aneurysm, the far-end embolism ring deforms into a polyhedral three-dimensional structure capable of being supported on the inner wall of the aneurysm, and the near-end spiral net deforms into a spiral shape with the diameter gradually reduced from the far end to the near end. According to the utility model, the embolism density can be increased, the rupture opening of the rupture aneurysm can be quickly and effectively blocked, the postoperative recurrence and rupture risk is reduced, the use amount is reduced, the medical cost is reduced, and the operation safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an aneurysm embolization device. Background Technology

[0002] An aneurysm is a condition in which an artery, due to congenital abnormalities or acquired damage, experiences decreased function and elasticity in its wall, gradually expanding or bulging under hemodynamic stress and other factors. Intracranial aneurysms are the leading cause of subarachnoid hemorrhage; once ruptured, they can lead to disability or even death. Current treatment options for intracranial aneurysms primarily include traditional open craniotomy clipping and endovascular interventional therapy. Traditional open craniotomy clipping requires opening the skull, separating brain tissue, and clipping the aneurysm neck, causing significant trauma to the patient and resulting in a long recovery period. Endovascular interventional therapy, due to its minimal invasiveness, rapid recovery, and fewer complications, is gradually replacing open craniotomy clipping and has become the preferred clinical treatment option for many medical experts.

[0003] Currently, coil embolization is one of the main methods for endovascular treatment of aneurysms. This technique involves placing coils within the aneurysm; the force exerted by the coils on the aneurysm wall stabilizes it. However, this treatment method has several drawbacks: ① In simple coil embolization, it is often difficult to achieve dense embolization at the aneurysm neck, resulting in incomplete occlusion and a high risk of recurrence; ② Overpacking with too many coils can lead to overpacking, potentially increasing the risk of aneurysm rupture; ③ For large aneurysms requiring dense packing, a large number of coils are often needed, requiring multiple procedures and increasing surgical risks and time, while also incurring higher costs for the patient. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an aneurysm embolization device to address the above-mentioned shortcomings.

[0005] This utility model is achieved through the following technical solution:

[0006] An aneurysm embolization device includes a distal embolization coil and a proximal spiral mesh connected to the distal embolization coil; after being released into the aneurysm, the distal embolization coil deforms into a multifaceted three-dimensional structure capable of supporting the inner wall of the aneurysm, and the proximal spiral mesh deforms into a spiral shape with a diameter gradually decreasing from the distal to the proximal end.

[0007] Furthermore, the aneurysm embolization device further includes a distal fixation member and a proximal fixation member respectively connected to both ends of the proximal spiral mesh; one end of the distal embolization coil is a free end, and the other end is connected to the distal fixation member, or the other end passes through the proximal spiral mesh and is connected to the proximal fixation member.

[0008] Furthermore, in the aforementioned aneurysm embolization device, adjacent spiral coils of the helical proximal spiral network partially overlap.

[0009] Furthermore, in the aforementioned aneurysm embolization device, the distal embolization coil, after being released into the aneurysm, is spherical.

[0010] Furthermore, in the aforementioned aneurysm embolization device, the distal embolization coil, after being released into the aneurysm, is composed of at least three shape units connected in different planes, wherein the shape units are S-shaped, n-shaped, U-shaped, O-shaped, or C-shaped.

[0011] Furthermore, in the aforementioned aneurysm embolization device, the distal embolization coil is a cored wire, the inner core of which is a nickel-titanium alloy wire or a mixture of nickel-titanium wire and non-transparent wire woven together.

[0012] Furthermore, in the aforementioned aneurysm embolization device, the proximal spiral mesh is a sheet-like or tubular structure woven from one or more braided filaments.

[0013] Furthermore, in the aforementioned aneurysm embolization device, the braided wire is a nickel-titanium alloy wire, a nickel-titanium-platinum core composite material wire, or a polymer material wire, and the diameter of the braided wire is 0.01mm-0.1mm.

[0014] Furthermore, in the aforementioned aneurysm embolization device, the number of braided filaments used in the proximal spiral mesh is 8-96.

[0015] The advantages and effects of this utility model are:

[0016] The aneurysm embolization device provided by this utility model includes a distal embolization coil that deforms into a multifaceted three-dimensional structure after being released into the aneurysm, and a proximal spiral mesh with a gradually decreasing diameter from distal to proximal. The distal embolization coil can support the inner wall of the aneurysm, while the proximal spiral mesh completely or partially seals the neck of the aneurysm and / or supports the distal embolization coil. This aneurysm embolization device can increase embolization density, quickly and effectively seal the rupture site for ruptured aneurysms, reduce the risk of postoperative recurrence and rupture, reduce the amount used, reduce medical costs, and improve surgical safety. Attached Figure Description

[0017] Figure 1 This diagram shows a schematic representation of the aneurysm embolization device according to Embodiment 1 of the present invention.

[0018] Figure 2 This diagram shows a schematic of the aneurysm embolization device according to Embodiment 2 of the present invention.

[0019] Figure 3This diagram shows the aneurysm embolization device provided by this invention after it is released into the aneurysm.

[0020] Explanation of reference numerals in the attached diagram: 1-Distal embolization coil; 2-Distal fixation element; 3-Proximal spiral mesh; 4-Proximal fixation element; 5-Aneurysm. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to the accompanying drawings:

[0022] In the description of this utility model, it should be understood that, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, as fixed connections, detachable connections, or integral connections; they can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] Figure 1This diagram illustrates the structure of the aneurysm embolization device according to Embodiment 1 of this invention. The embolization device includes a distal embolization coil 1, a distal fixation member 2, a proximal spiral mesh 3, and a proximal fixation member 4. The distal fixation member 2 and the proximal fixation member 4 are respectively connected to both ends of the proximal spiral mesh 3. One end of the distal embolization coil 1 is a free end, and the other end is connected to the distal end of the proximal spiral mesh 3 via the distal fixation member 2. After the embolization device is released into the aneurysm 5, the distal embolization coil 1 deforms into a multifaceted three-dimensional structure, capable of supporting the inner wall of the aneurysm 5; the proximal spiral mesh 3 deforms into a spiral shape, used to completely or partially block the neck of the aneurysm 5, and provides support for the distal embolization coil 1. Multiple aneurysm embolization devices can be released into an aneurysm as needed. Figure 3 As shown, two aneurysm embolization devices are installed within an aneurysm. The proximal spiral mesh of the upper aneurysm embolization device supports the distal embolization coil, which is supported by the inner wall of the aneurysm. The proximal spiral mesh of the lower aneurysm embolization device is used to seal the neck of the aneurysm and supports the distal embolization coil, which is supported by the inner wall of the aneurysm and is used to fill the space within the aneurysm.

[0024] The proximal spiral network 3 is composed of several interconnected spiral coils, with the diameter of the coils gradually decreasing from the distal to the proximal end. Adjacent spiral coils of this proximal spiral network 3 partially overlap, making the occlusion more reliable and the support more stable. The distal embolization coil 1, after being released into the aneurysm, deforms into a spherical shape; or it is composed of at least three shape units connected in different planes, each shape unit forming a multifaceted three-dimensional structure that supports the inner wall of the aneurysm 5. The shape units are S-shaped, n-shaped, U-shaped, O-shaped, or C-shaped.

[0025] The distal embolization coil 1 and the proximal spiral mesh 3 are made of wires with different structures and materials. The distal embolization coil 1 is a cored wire, the inner core of which is a woven mixture of nickel-titanium alloy wire and non-transparent wire, i.e., a woven mixture of nickel-titanium alloy wire and non-transparent wire, or a woven mixture of nickel-titanium wire and non-transparent wire. The proximal spiral mesh 3 is a sheet-like or tubular structure woven from one or more types of braided wires. The braided wires are nickel-titanium alloy wires, nickel-titanium platinum core composite wires, or polymer material wires, and the diameter of the braided wires is 0.01mm-0.1mm. Each proximal spiral mesh 3 uses 8-96 of the aforementioned braided wires.

[0026] Figure 2 The diagram shows a schematic of the aneurysm embolization device according to Embodiment 2 of this invention. Unlike Embodiment 1, one end of the distal embolization coil 1 is a free end, and the other end passes through the proximal spiral mesh 3 and is connected to the proximal end of the proximal spiral mesh 3 by the proximal fixing member 4.

[0027] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of implementation of this utility model. Any equivalent changes and modifications made within the protection scope of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. An aneurysm embolization device, characterized in that, The embolization device includes a distal embolization coil (1) and a proximal spiral mesh (3) connected to the distal embolization coil (1); after being released into the aneurysm (5), the distal embolization coil (1) is deformed into a multifaceted three-dimensional structure that can support the inner wall of the aneurysm (5), and the proximal spiral mesh (3) is deformed into a spiral shape with a gradually decreasing diameter from the distal end to the proximal end.

2. The aneurysm embolization device according to claim 1, characterized in that, The embolization device also includes a distal fixing member (2) and a proximal fixing member (4) respectively connected to both ends of the proximal spiral mesh (3); one end of the distal embolization ring (1) is a free end, and the other end is connected to the distal fixing member (2), or the other end passes through the proximal spiral mesh (3) and is connected to the proximal fixing member (4).

3. The aneurysm embolization device according to claim 1, characterized in that, The adjacent spiral loops of the spiral-shaped proximal spiral mesh (3) partially overlap.

4. The aneurysm embolization device according to claim 1, characterized in that, The distal embolization coil (1) after being released into the aneurysm is spherical.

5. The aneurysm embolization device according to claim 1, characterized in that, The distal embolization coil (1) after being released into the aneurysm is composed of at least three shape units connected in different planes, the shape units being S-shaped, n-shaped, U-shaped, O-shaped or C-shaped.

6. The aneurysm embolization device according to claim 1, characterized in that, The distal embolization ring (1) is a cored wire, the inner core of which is a nickel-titanium alloy wire or a mixture of nickel-titanium wire and non-transparent wire.

7. The aneurysm embolization device according to claim 1, characterized in that, The proximal spiral mesh (3) is a sheet-like or tubular structure woven from one or more braided filaments.

8. The aneurysm embolization device according to claim 7, characterized in that, The braided wire is a nickel-titanium alloy wire, a nickel-titanium-platinum core composite material wire, or a polymer material wire, and the diameter of the braided wire is 0.01mm-0.1mm.

9. The aneurysm embolization device according to claim 7, characterized in that, The number of braided filaments used in each of the near-end spiral meshes (3) is 8-96.

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