Aneurysm embolism device with spring ring integrated with umbrella-shaped dense net

Abstract

The utility model provides an aneurysm embolism device with a spring ring integrated with an umbrella-shaped dense net. The aneurysm embolism device comprises a spring ring body, a central connecting rod and a metal woven dense net, one end of the spring ring body is connected with the central connecting rod through a micro rivet; the metal woven dense net is of an umbrella-shaped structure, and the tail ends of net wires in the center of the metal woven dense net are axially bundled and fixed in a lantern ring in the center through welding. The lantern ring is fixedly welded to the end, away from the spring ring body, of the center connecting rod. According to the integrated umbrella-shaped dense net spring ring system, the traditional embolism technology and the blood flow guiding concept are creatively combined, the dense net structure serves as a physical barrier and can effectively prevent the spring ring from shifting, and the precise net hole design can remarkably change the hemodynamic characteristics of the tumor neck; in addition, due to the integrated design, the surgical operation process is simplified, and the technical difficulty is reduced. The innovative design concept not only solves the key technical problem in the treatment of the wide-neck aneurysm, but also remarkably improves the safety and reliability of the treatment.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an aneurysm embolization device with spring coils integrated with an umbrella-shaped dense mesh. Background Technology

[0002] Intracranial aneurysms are abnormal bulging lesions on the walls of blood vessels in the brain, characterized by high incidence, high mortality, and high mortality rates, seriously endangering patients' lives and health. Currently, the main clinical treatment for intracranial aneurysms is coil embolization, which promotes thrombus formation within the aneurysm through physical packing and blood flow interference. However, it still faces significant challenges in managing special types of aneurysms. For complex aneurysms such as wide-necked aneurysms and giant aneurysms, due to the wide neck and strong blood flow impact, traditional coils are prone to displacement and escape, potentially leading to occlusion of the parent artery or distal embolization.

[0003] Existing solutions to this clinical challenge each have their limitations: simply increasing the number of coils not only increases the difficulty and cost of the surgery, but may also affect the blood flow in the tumor-bearing artery; while stent-assisted techniques can improve stability, they have problems such as complex operation, excessive metal coverage, and the need for long-term anticoagulation after surgery, while also significantly increasing treatment costs.

[0004] Therefore, there is an urgent need to provide an embolization device with good stability that can meet the needs of complex aneurysms such as wide-necked aneurysms and giant aneurysms. Utility Model Content

[0005] The purpose of this invention is to provide an aneurysm embolization device with an integrated umbrella-shaped mesh coil to solve the problems mentioned in the background art. The integrated umbrella-shaped mesh coil system proposed in this invention creatively combines traditional embolization technology with the concept of blood flow guidance. While maintaining the coil embolization function, this system achieves multiple advantages through the integrated umbrella-shaped mesh structure at the end: firstly, the mesh structure acts as a physical barrier to effectively prevent coil displacement; secondly, its precise mesh design significantly alters the hemodynamic characteristics at the aneurysm neck; and thirdly, the integrated design simplifies the surgical procedure and reduces technical difficulty. This innovative design concept not only solves the key technical challenges in the treatment of wide-necked aneurysms but also significantly improves the safety and reliability of the treatment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An aneurysm embolization device with spring coils integrated with an umbrella-shaped mesh is characterized by comprising a spring coil body, a central connecting rod, and a metal braided mesh;

[0008] One end of the spring coil body is connected to the central connecting rod by a micro rivet; the metal woven mesh is an umbrella-shaped structure, with the ends of the mesh wires in the center axially bundled and fixed to the collar by welding; the collar is welded to the end of the central connecting rod away from the spring coil body.

[0009] Preferably, the metal woven mesh has a length of 1.5mm-5mm in the coiled state and is circular with a diameter of 3mm-8mm in the unfolded state.

[0010] Preferably, when the metal woven mesh is unfolded, the porosity increases from the center to the edge, with the porosity in the central area being 30-50% and the porosity in the edge area being 50-70%.

[0011] Preferably, the spring coil body has a two-stage coil structure, with the diameter of the first-stage coil being 0.3-2mm, the diameter of the second-stage coil being 2-8mm, and the wire diameter being 0.005mm-0.1mm.

[0012] Preferably, the micro rivet passes through the end of the spring coil body and the proximal end of the central connecting rod to form an axial fixation.

[0013] Preferably, the diameter of the metal wires in the metal woven mesh is 0.005mm-0.03mm.

[0014] Preferably, the metal woven mesh has quadrilateral mesh openings with a mesh size of 0.02-0.05 mm. 2 .

[0015] Preferably, the metal woven mesh is made of at least one of variable density weaving, self-unfolding weaving, plain weaving, or twill weaving.

[0016] Preferably, the central connecting rod has a developing mark near the tail end of the collar.

[0017] Preferably, the material of the spring coil body is one or more of platinum-tungsten alloy, nickel-titanium alloy, and platinum; the metal wire of the metal braided mesh is selected from at least one of platinum-iridium alloy wire, nickel-titanium alloy wire, platinum-tungsten alloy wire, or stainless steel wire; the material of the micro rivet is platinum-iridium alloy, with a diameter of 0.02mm-0.1mm.

[0018] The aneurysm embolization device with spring coil integrated umbrella-shaped dense mesh provided by this utility model can achieve the following technical effects:

[0019] 1. This invention achieves reliable aneurysm neck protection through an integrated structure. The integrated design of the umbrella-shaped mesh and the coil body can automatically unfold and cover the aneurysm neck while filling the aneurysm cavity, forming a physical barrier. This design is very suitable for wide-necked aneurysms and giant aneurysms, effectively solving the clinical pain point of traditional coils being prone to escape. At the same time, single-system operation reduces instrument changes and shortens operation time, which not only improves surgical efficiency but also significantly reduces surgical risks.

[0020] 2. This utility model utilizes a unique gradient pore design (the porosity of the central area of ​​the metal braided mesh is 30-50%, and that of the edge area is 50-70%). The low-porosity central area can reduce blood flow velocity and decrease the shear force of blood flow on the aneurysm, while the high-porosity edge can conform to the aneurysm wall and reduce mechanical stimulation to the vascular intima. At the same time, the metal braided mesh can slow down the blood flow velocity at the aneurysm neck while maintaining the patency of the branches of the aneurysm-bearing artery. Compared with the prior art, it avoids the disadvantages of single coil embolization, thus adapting to more scenarios. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrative descriptions and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are similar elements, and wherein:

[0022] Figure 1 This is a schematic diagram of the structure of an aneurysm embolization device with spring coils integrated with an umbrella-shaped dense mesh, according to this utility model.

[0023] Figure 2 This is a top view of the metal woven mesh of this utility model in its unfolded state.

[0024] Figure 3 This is a schematic diagram of an aneurysm embolization device with an integrated umbrella-shaped mesh spring coil, which is coiled within a microcatheter according to this utility model.

[0025] Figure 4 This invention relates to the application scenario of an aneurysm embolization device with a spring coil integrated with an umbrella-shaped dense mesh in a wide-necked aneurysm.

[0026] Reference numerals: 1-Spring coil body; 2-Central connecting rod; 3-Metal braided mesh; 4-Miniature rivet; 5-Loop; 6-Microcatheter; 7-Aneurysm; 8-Carrying artery. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 As shown, an aneurysm embolization device integrating a spring coil and an umbrella-shaped mesh includes a spring coil body 1, a central connecting rod 2, and a metal braided mesh 3. One end of the spring coil body 1 is connected to the central connecting rod 2 by a micro rivet 4. The metal braided mesh 3 has an umbrella-shaped structure, with the ends of the mesh wires in the center axially bundled and fixed to a collar 5 by welding. The collar 5 is welded to the end of the central connecting rod 2 away from the spring coil body 1.

[0029] In one embodiment, such as Figure 3 As shown, the length of the metal woven mesh 3 in the coiled state is 1.5mm-5mm; Figure 2 As shown, it is circular in its unfolded state, with a diameter of 3mm-8mm.

[0030] In one embodiment, such as Figure 2 As shown, when the metal woven mesh 3 is in the unfolded state, the porosity of the metal woven mesh 3 increases from the center to the edge, with the porosity of the central area being 30-50% and the edge area being 50-70%.

[0031] In one embodiment, the spring coil body 1 has a two-stage coil structure, with the diameter of the first-stage coil being 0.3-2 mm, the diameter of the second-stage coil being 2-8 mm, and the wire diameter being 0.005 mm-0.1 mm.

[0032] In one embodiment, a micro rivet 4 passes through the end of the spring coil body 1 and the proximal end of the central connecting rod 2 to form an axial fixation. The micro rivet 4 is made of platinum-iridium alloy, has a diameter of 0.02-0.1 mm, is embedded in a pre-drilled laser-drilled mating hole, and is formed by pressing.

[0033] In one embodiment, the diameter of the metal wires in the metal woven mesh 3 is 0.005mm-0.03mm.

[0034] In one embodiment, the metal woven mesh 3 has quadrilateral mesh openings with a mesh size of 0.02-0.05 mm. 2 .

[0035] In one embodiment, the metal woven mesh 3 employs any one of variable density weaving, self-unfolding weaving, plain weaving, or twill weaving. Variable density weaving uses different weaving densities in different areas, or changes the local mesh size by adjusting the number / angle of the threads. Self-unfolding weaving involves pre-weaving into a compressed state, which, upon release, expands to a preset diameter based on material memory. Plain weaving uses alternating "one up, one down" patterns to form a uniform mesh structure. Twill weaving uses "two up, two down" or more complex diagonal crossing patterns to form a diagonal texture.

[0036] In one embodiment, the central connecting rod 2 has a developing mark near the tail end of the collar 5.

[0037] In one embodiment, the spring coil body 1 is made of one or more of platinum-tungsten alloy, nickel-titanium alloy, and platinum; the metal wire of the metal braided mesh 3 is selected from at least one of platinum-iridium alloy wire, nickel-titanium alloy wire, platinum-tungsten alloy wire, or stainless steel wire; and the micro rivet 4 is made of platinum-iridium alloy.

[0038] The method of using this utility model is as follows:

[0039] In this invention, the spring coil integrated umbrella-shaped mesh aneurysm embolization device is delivered into the aneurysm cavity via a microcatheter. In practical use, such as... Figure 3 As shown, the aneurysm embolization device with spring coils integrated with an umbrella-shaped dense mesh is bound to the microcatheter 6, the secondary structure of the spring coil body 1 is stretched, and the metal braided dense mesh 3 is in a contracted state.

[0040] An exemplary embodiment of the application scenario: In the embodiments of this utility model, such as Figure 4 As shown, for the embolization of a wide-necked aneurysm, when the microcatheter 6 is delivered, the coil body 1 is preferentially pushed out of the microcatheter 6, expanding and filling the aneurysm cavity; the umbrella-shaped metal braided mesh 3 is then pushed out of the microcatheter 6, automatically expanding at the aneurysm neck. The metal braided mesh 3 is at a certain angle in a completely free expansion state (without external force constraint). Subsequently, the metal braided mesh 3 completely covers the aneurysm neck, with the collar 5 assisting in positioning. The central porosity of the metal braided mesh 3 is 30%, effectively covering the aneurysm neck while providing good support.

[0041] Furthermore, in this embodiment of the invention, since the integrated umbrella-shaped mesh aneurysm embolization coil needs to be operated inside the blood vessel during practical application, a contrast-enhancing mark is provided at the end of the central connecting rod 2 near the collar 5 to facilitate the operator's observation of the position of the umbrella-shaped mesh. This design allows the operator to determine the specific location of the umbrella-shaped mesh through the contrast-enhancing mark, improving the applicability and safety of the integrated umbrella-shaped mesh aneurysm coil.

[0042] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An aneurysm embolization device with spring coils integrated into an umbrella-shaped dense mesh, characterized in that, It includes a spring coil body (1), a central connecting rod (2), and a metal woven mesh (3); One end of the spring coil body (1) is connected to the central connecting rod (2) by a micro rivet (4); the metal woven mesh (3) is an umbrella-shaped structure, and the ends of the mesh wires in the center are axially bundled and fixed to the collar (5) by welding; the collar (5) is welded to the end of the central connecting rod (2) away from the spring coil body (1).

2. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 1, characterized in that, The metal woven mesh (3) has a length of 1.5mm-5mm in the coiled state and is circular with a diameter of 3mm-8mm in the unfolded state.

3. The aneurysm embolization device with spring coil integrated umbrella-shaped dense mesh according to claim 2, characterized in that, When the metal woven mesh (3) is in the unfolded state, the porosity increases from the center to the edge, with the porosity of the central area being 30-50% and the edge area being 50-70%.

4. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 3, characterized in that, The spring coil body (1) has a two-stage coil structure, with the diameter of the first-stage coil being 0.3-2mm, the diameter of the second-stage coil being 2-8mm, and the wire diameter being 0.005mm-0.1mm.

5. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 4, characterized in that, The micro rivet (4) passes through the end of the spring coil body (1) and the proximal end of the central connecting rod (2) to form an axial fixation.

6. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 5, characterized in that, The diameter of the metal wires in the metal woven mesh (3) is 0.005mm-0.03mm.

7. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 6, characterized in that, The metal woven mesh (3) has quadrilateral mesh openings with a mesh size of 0.02-0.05 mm. 2 .

8. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 7, characterized in that, The metal woven mesh (3) is made of at least one of variable density weaving, self-unfolding weaving, plain weaving or twill weaving.

9. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 8, characterized in that, The central connecting rod (2) has a developing mark at the end near the collar (5).

10. The aneurysm embolization device with spring coil integrated umbrella-shaped mesh according to claim 9, characterized in that, The spring coil body (1) is made of one or more of platinum-tungsten alloy, nickel-titanium alloy and platinum; the metal wire of the metal braided mesh (3) is selected from at least one of platinum-iridium alloy wire, nickel-titanium alloy wire, platinum-tungsten alloy wire or stainless steel wire; the micro rivet (4) is made of platinum-iridium alloy and has a diameter of 0.02mm-0.1mm.

Images