Blood flow guiding device

By using polymer wire materials prepared by polymer materials, the weaving density of the dense mesh area is improved and the smooth structure is set at the end of the wire material, the problems of insufficient density of existing dense mesh stents and the risk of blood vessel damage are solved, and more efficient Blood flow blockage and lower risk of vascular damage.

CN222444449UActive Publication Date: 2025-02-11SHANGHAI ACHIEVA MEDICAL SUZHOU CO LTD
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Patent Information

Application Number
CN202323559334.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-26
Publication Date
2025-02-11
Estimated Expiration
2033-12-26

AI Technical Summary

Technical Problem

When the existing dense mesh stent is treated with aneurysms, the hardness of the metal braided wire leads to insufficient density in the dense mesh area, which cannot effectively block blood flow. The sharpness of the end of the braided wire is prone to cause poking to blood vessels, increasing the risk of surgery.

Method used

Polymer wire is prepared by using polymer materials to reduce the hardness of the wire material to increase the weaving density in the dense mesh area, and a smooth structure is set at the end of the wire material to reduce damage to blood vessels.

Benefits of technology

It improves the weaving density of dense mesh areas, enhances the blood flow blocking effect, and reduces the risk of vascular damage, and improves the reliability of the blood flow guide device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of medical instrument manufacturing, in particular to a blood flow guiding device. The device comprises a flow guide support and a plurality of polymer wires, the flow guide support is of a cylindrical surface structure, and the polymer wires are woven on the flow guide support to form a dense net area; each macromolecule wire comprises a main body part and a smooth structure arranged at one end or two ends of the main body part, and a fixing hole is formed in the flow guide support and is in interference fit connection with the smooth structure; the dense net area is prepared from macromolecule wires prepared from macromolecules, the hardness of the woven wires is reduced, and then the weaving density of the dense net area is improved; meanwhile, a smooth structure is arranged at the tail end of the polymer wire, so that damage to blood vessels is reduced.
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Description

Technical Field

[0001] The present application relates to the technical field of medical device manufacturing, and in particular to a blood flow guiding device. Background Art

[0002] Aneurysm is a common vascular disease that is formed due to lesions or damage to the arterial wall. It manifests as localized or diffuse expansion or bulging of the arterial wall, with an expansive, fluctuating mass as the main manifestation. The treatment methods for aneurysm are divided into surgical craniotomy and interventional endovascular therapy. Compared with surgical craniotomy, interventional endovascular therapy has the advantages of less trauma and shorter recovery time.

[0003] In the prior art, interventional intravascular treatment usually uses a dense mesh stent, and the dense mesh area in the dense mesh stent is usually woven with metal braided wire. Since the metal braided wire itself has a certain hardness, the density of the woven dense mesh area is relatively small and cannot effectively block the blood flow. At the same time, since the metal braided wire itself is sharp, the end of the metal braided wire can easily puncture the blood vessel, resulting in the risk of spasm and / or thrombosis during the operation. Summary of the invention

[0004] In response to the above-mentioned problems of the prior art, the purpose of this application is to use polymer filaments made of polymers to prepare dense mesh areas, reduce the hardness of the woven filaments, and thereby increase the weaving density of the dense mesh areas; at the same time, a smooth structure is set at the end of the polymer filaments to reduce damage to blood vessels.

[0005] In order to solve the above problems, the present application provides a blood flow guiding device, including a flow guiding stent and a plurality of polymer filaments, wherein the flow guiding stent is a cylindrical structure, and the plurality of polymer filaments are woven on the flow guiding stent to form a dense mesh area;

[0006] Each polymer filament comprises a main body and a smooth structure arranged at at least one end of the main body, and a fixing hole is arranged on the flow guide bracket, and the fixing hole is connected with the smooth structure by interference fit.

[0007] In the embodiment of the present application, a plurality of weaving holes are provided on the flow guiding bracket, and a plurality of the polymer filaments are woven on the flow guiding bracket through the weaving holes.

[0008] In the embodiment of the present application, the same polymer filament is wound around the flow-guiding bracket through a plurality of the braided holes, and the adjacent braided holes corresponding to the same polymer filament are arranged in a staggered manner.

[0009] In an embodiment of the present application, the guide bracket includes a plurality of rhombus-shaped skeleton units, and the plurality of rhombus-shaped skeleton units are hollow structures.

[0010] In the embodiment of the present application, the axis where the plurality of polymer filaments are located is parallel or perpendicular to the axisymmetric line of the rhombus skeleton unit.

[0011] In another embodiment of the present application, the axes on which the plurality of polymer filaments are located are parallel to or intersect with the rhombus sides of the rhombus skeleton unit.

[0012] In an embodiment of the present application, the diversion bracket includes a nickel alloy bracket.

[0013] In the embodiment of the present application, the axes of the adjacent polymer filaments are located on two opposite surfaces respectively.

[0014] In the embodiment of the present application, the diameter of the main body portion is 0.01-0.10 mm.

[0015] In the embodiment of the present application, the number of the plurality of polymer filaments is 30-150.

[0016] Due to the above technical solution, the blood flow guiding device described in this application has the following beneficial effects:

[0017] The dense mesh area is prepared by using polymer wires made of polymers. The hardness of the polymer wires is smaller than that of metal wires, so a denser dense mesh area can be woven, thereby increasing the weaving density of the dense mesh area;

[0018] By setting a smooth structure at both ends of the main part of the polymer wire, it is prevented that the end of the polymer wire causes puncture to the blood vessel, thereby reducing the damage of the blood flow guiding device to the blood vessel;

[0019] The smooth structure is connected with the fixing hole on the diversion stent by interference fit, thereby improving the fixing stability of the polymer filament and the diversion stent, thereby improving the reliability of the blood flow guiding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the structure of a blood flow guiding device provided in an embodiment of the present application;

[0022] Figure 2 is a schematic structural diagram of a blood flow guiding device provided by another embodiment of the present application;

[0023] Figure 3This is a schematic diagram of the structure of a polymer filament in a blood flow guiding device provided in an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of the structure of a polymer filament in a blood flow guiding device provided in another embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of the structure of a diversion stent in a blood flow diversion device provided in an embodiment of the present application;

[0026] Figure 6 is a braiding schematic diagram of a blood flow guiding device provided in an embodiment of the present application;

[0027] Figure 7 This is a braiding schematic diagram of a blood flow guiding device provided in another embodiment of the present application.

[0028] Among them, 1-flow guide bracket, 11-fixing hole, 12-weaving hole, 2-polymer filament, 21-main body, 22-smooth structure, 3-dense mesh area. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0031] Combination Figure 1-5 , introduces a blood flow guiding device provided by an embodiment of the present application, which includes a diversion stent 1 and a plurality of polymer filaments 2. The diversion stent 1 is a cylindrical structure, and the plurality of polymer filaments 2 are woven on the diversion stent 1 to form a dense mesh area 3; each polymer filament 2 includes a main body 21 and a smooth structure 22 arranged at at least one end of the main body 21, and a fixing hole 11 is provided on the diversion stent 1, and the fixing hole 11 is connected to the smooth structure 22 by interference fit.

[0032] In the embodiment of the present application, the polymer filament 2 is made of polymer materials. Specifically, the polymer filament 2 can be made of polymer materials such as block polyetheramide elastomer (PEBAX), polyester resin (PET), nylon fabric (NYLON) and polytetrafluoroethylene (PETFE).

[0033] In the specific embodiments of this application, refer to Figure 3 , a smooth structure 22 is provided at one end of the main body 21; Figure 4 , smooth structures 22 are provided at both ends of the main body part 21.

[0034] In the embodiment of the present application, the main body 21 is a cylindrical wire, and the smooth structure 22 can be a spherical structure or an elliptical structure; specifically, the smooth structure 22 is prepared by hot melting.

[0035] In the embodiment of the present application, the dense mesh area 3 is prepared by using a polymer filament 2 made of a polymer. The hardness of the polymer filament 2 is smaller than that of the metal filament. Therefore, a denser dense mesh area 3 can be woven, thereby increasing the weaving density of the dense mesh area 3.

[0036] In the embodiment of the present application, by providing smooth structures 22 at both ends of the main body 21 of the polymer wire 2, it is prevented that the end of the polymer wire 2 causes puncture to the blood vessel, thereby reducing the damage of the blood flow guiding device to the blood vessel.

[0037] In the embodiment of the present application, the smooth structure 22 is connected to the fixing hole 11 on the flow diversion stent 1 by interference fit, thereby improving the fixing stability of the polymer filament 2 and the flow diversion stent 1, thereby improving the reliability of the blood flow diversion device.

[0038] In the embodiment of the present application, a plurality of weaving holes 12 are provided on the flow guiding bracket 1 , and a plurality of polymer filaments 2 are woven on the flow guiding bracket 1 through the weaving holes 12 .

[0039] In the embodiment of the present application, a plurality of weaving holes 12 are provided on the diversion stent 1, and when the polymer filaments 2 are woven in the dense mesh area 3, the polymer filaments 2 can pass through the weaving holes 12, so as to improve the connection tightness between the polymer filaments 2 and the diversion stent 1, thereby improving the reliability of the blood flow guiding device.

[0040] In the embodiment of the present application, the same polymer filament 2 is wound on the flow-guiding bracket 1 through a plurality of weaving holes 12 , and the adjacent weaving holes 12 corresponding to the same polymer filament 2 are arranged in a staggered manner.

[0041] In a specific embodiment of the present application, the same polymer filament 2 is woven on the diversion bracket 1 through staggered weaving holes 12, which represents that the same polymer filament 2 is woven on the diversion bracket 1 in the form of multiple "S" shapes, wherein the two convex surfaces formed by the "S" shape are respectively located on the inner surface and the outer surface of the cylindrical structure.

[0042] In the embodiment of the present application, the same polymer filament 2 is woven into an "S" shape on the flow guiding stent 1, thereby improving the compactness of the weaving of the polymer filament 2 and further improving the functionality of the blood flow guiding device.

[0043] In another specific embodiment of the present application, the aperture of the weaving hole 12 faces the axis of the cylindrical structure, so that the polymer filaments 2 are woven on the flow-guiding bracket 1 in the form of multiple “S” shapes.

[0044] In the embodiment of the present application, the flow guide bracket 1 includes a plurality of rhombus-shaped skeleton units, and the plurality of rhombus-shaped skeleton units are hollow structures.

[0045] refer to Figure 6 In the embodiment of the present application, the axis where the multiple polymer filaments 2 are located is parallel or perpendicular to the axisymmetric line of the rhombus skeleton unit.

[0046] In the embodiment of the present application, the axis lines where the plurality of polymer filaments 2 are located are parallel to or perpendicular to the axisymmetric line of the rhombus skeleton unit, which indicates that the polymer filaments 2 are woven along the axisymmetric line of the rhombus skeleton unit.

[0047] In a specific embodiment of the present application, when a smooth structure 22 is provided at one end of the main body 21 and not provided at the other end, the axis of the plurality of polymer filaments 2 and the axial symmetry line of the rhombus skeleton unit can be completely parallel or perpendicular; that is, the plurality of polymer filaments 2 are woven on the flow guide bracket 1 in a longitudinal or transverse direction.

[0048] In a specific embodiment of the present application, when the rounded structures 22 are provided at both ends of the main body 21, an angle exists between the axis where the plurality of polymer filaments 2 are located and the axisymmetric line of the rhombus skeleton unit, and the minimum angle is 1-3°.

[0049] refer to Figure 7 In another embodiment of the present application, the axes where the multiple polymer filaments 2 are located are parallel to or intersect with the rhombus sides of the rhombus skeleton unit.

[0050] In the embodiment of the present application, the axes where the multiple polymer filaments 2 are located are parallel to or intersect with the rhombus sides of the rhombus skeleton unit, which indicates that the polymer filaments 2 are woven along the rhombus sides of the rhombus skeleton unit.

[0051] In the embodiment of the present application, the flow guide bracket 1 includes a nickel alloy bracket.

[0052] In the embodiment of the present application, the axes of adjacent polymer filaments 2 are located on two opposite surfaces respectively.

[0053] In a specific embodiment of the present application, when the polymer filaments 2 are woven in an "S" shape on the flow-guiding bracket 1, the surfaces corresponding to the two convex surfaces formed by the "S" shape of any polymer filament 2 are on opposite sides to the surfaces corresponding to the two convex surfaces formed by the "S" of an adjacent polymer filament 2; for example, the upper part of any polymer filament 2 corresponds to the inner surface, and the lower part corresponds to the outer surface, then the upper part of the adjacent polymer filament 2 corresponds to the outer surface, and the lower part corresponds to the inner surface.

[0054] In the embodiment of the present application, the diameter of the main body portion 21 is 0.01-0.10 mm.

[0055] In the embodiment of the present application, the number of the plurality of polymer filaments 2 is 30-150.

[0056] In the specific embodiment of the present application, the diameter of the main body 21 affects the quantity of the polymer filaments 2 .

[0057] The blood flow guiding device in the embodiment of the present application has the following beneficial effects:

[0058] The dense mesh area 3 is prepared by using a polymer wire material 2 made of polymer. The hardness of the polymer wire material 2 is smaller than that of the metal wire material, so the dense mesh area 3 with a higher weaving density can be woven, thereby improving the weaving density of the dense mesh area 3; by arranging smooth structures 22 at both ends of the main part 21 of the polymer wire material 2, it is avoided that the end of the polymer wire material 2 causes puncture to the blood vessel, thereby reducing the damage of the blood flow guiding device to the blood vessel; by connecting the smooth structure 22 with the fixing hole 11 on the diversion stent 1 by interference fit, the fixing stability of the polymer wire material 2 and the diversion stent 1 is improved, thereby improving the reliability of the blood flow guiding device.

[0059] The above description has fully disclosed the specific implementation methods of the present application. It should be pointed out that any changes made by technicians familiar with the field to the specific implementation methods of the present application do not deviate from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the above specific implementation methods.

Claims

1. A blood flow guiding device, characterized in that: It comprises a flow-guiding support (1) and a plurality of polymer filaments (2), wherein the flow-guiding support (1) is a cylindrical structure, and the plurality of polymer filaments (2) are woven on the flow-guiding support (1) to form a dense mesh area (3); Each of the polymer filaments comprises a main body (21) and a smooth structure (22) arranged at at least one end of the main body (21); a fixing hole (11) is provided on the flow guide bracket (1); and the fixing hole (11) is connected to the smooth structure (22) by interference fit.

2. A blood flow guiding device according to claim 1, characterized in that: The flow-guiding support (1) is provided with a plurality of weaving holes (12), and a plurality of polymer filaments (2) are woven onto the flow-guiding support (1) through the weaving holes (12).

3. A blood flow guiding device according to claim 2, characterized in that: The same polymer filament (2) is wound around the flow-guiding support (1) through a plurality of the braided holes (12), and the adjacent braided holes (12) corresponding to the same polymer filament (2) are arranged in a staggered manner.

4. A blood flow guiding device according to claim 1, characterized in that: The flow guide bracket (1) comprises a plurality of rhombus-shaped skeleton units, and the plurality of rhombus-shaped skeleton units are hollow structures.

5. A blood flow guiding device according to claim 4, characterized in that: The axes on which the plurality of polymer filaments (2) are located are parallel or perpendicular to the axisymmetric line of the rhombus skeleton unit.

6. A blood flow guiding device according to claim 4, characterized in that: The axes on which the plurality of polymer filaments (2) are located are parallel to or intersect with the rhombus sides of the rhombus skeleton units.

7. The blood flow guiding device according to claim 1, characterized in that: The flow guide bracket (1) comprises a nickel alloy bracket.

8. The blood flow guiding device according to claim 1, characterized in that: The axes of the adjacent polymer filaments (2) are located on two opposite surfaces respectively.

9. The blood flow guiding device according to claim 1, characterized in that: The diameter of the main body part (21) is 0.01-0.10 mm.

10. The blood flow guiding device according to claim 1, characterized in that: The number of the plurality of polymer filaments (2) is 30-150.