Occluder with reinforced choked flow film

Abstract

The utility model relates to the technical field of medical equipment, in particular to a plugging device with a reinforced choked flow film. Comprising a framework which is of an elastic net-shaped structure; the flow choking film is sewn on the framework through a suture line, the flow choking film is arranged on the outer side or the inner side of the framework, and a through hole is formed in the flow choking film when the suture line is sewn; and a reinforcing coating formed by a coating material is arranged on the outer surface of the choked flow film. The framework is of an elastic net-shaped structure and can be conveniently installed in the conveying sheath tube, the framework can support the flow blocking film, the framework and the flow blocking film are extruded in the conveying sheath tube in a columnar mode when the framework is located in the conveying sheath tube, and after the plugging device is released, the framework and the flow blocking film are opened under the elastic effect, so that the conveying sheath tube is filled with the flow blocking film. And the flow choking film is used for choking flow. The reinforcing coating can reinforce the surface layer of the flow choking film, so that the mechanical property of the flow choking film is improved, and the flow choking film is not easy to generate tearing and holes under the action of stretching and extruding.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely relates to a kind of occluder of flow resistance film reinforcement. BACKGROUND

[0002] The occluder can be loaded into a tubular delivery sheath tube, and then pushed to the implantation site through the delivery sheath tube. After the delivery sheath tube releases the occluder, the occluder blocks the blood flow.

[0003] However, the flow resistance film of the existing occluder will be stretched and extruded when it is sent to the delivery sheath tube, which may cause the flow resistance film to tear and deform and thus produce holes. After the occluder is released, there is a risk of residual blood shunt, and endothelial cells are also difficult to adhere and cover on the flow resistance film, making it difficult to endothelialize, so that the flow resistance effect of the occluder is not ideal. SUMMARY

[0004] Therefore, the utility model overcomes the technical problems in the prior art and provides an occluder with reinforced flow resistance film.

[0005] The utility model provides an occluder with reinforced flow resistance film, comprising:

[0006] A framework having an elastic mesh structure;

[0007] A flow resistance film sewn on the framework by sutures, which is arranged on the outer side or inner side of the framework, and has perforations when sewn by sutures;

[0008] The outer surface of the flow resistance film is provided with a reinforced coating formed by a coating material.

[0009] Further, the coating material is a high molecular material.

[0010] Further, the melting point of the coating material is lower than that of the flow resistance film.

[0011] Further, the reinforced coating is formed by melting the heated coating material on the outer surface of the flow resistance film.

[0012] Further, the coating material is a material that can be dissolved by a dissolving solvent.

[0013] Further, the flow resistance film is insoluble in the dissolving solvent.

[0014] Further, the reinforced coating is formed by spin-coating the dissolving solvent containing the coating material on the outer surface of the flow resistance film.

[0015] Further, the shape and position of the reinforced coating are set based on the stress condition of the flow resistance film in motion.

[0016] Further, the reinforcing coating is arranged at the edge of the outer surface of the flow resistance film, the suture seam and the perforation.

[0017] The technical scheme of the utility model has the following advantages:

[0018] The utility model provides a kind of plugging device of flow resistance film reinforcement, the framework is the net structure with elasticity, it can be conveniently loaded into to delivery sheath pipe, framework can play the role of supporting to flow resistance film, when being located in delivery sheath pipe, framework is extruded in delivery sheath pipe with columnar form along with flow resistance film, plugging device is released, and framework is opened along with flow resistance film under the action of elasticity, so that flow resistance film carries out flow resistance after release of plugging device.The reinforcing coating can reinforce the surface layer of the flow resistance film, increasing the mechanical properties of the flow resistance film, so that the flow resistance film is not easy to tear and hole under the action of stretching and extrusion, ensuring the flow resistance effect of the flow resistance film.

[0019] The utility model provides a kind of plugging device of flow resistance film reinforcement, the coating material is high molecular material, and the high molecular material for conventional flow resistance film reinforcement coating is conveniently obtained, and the cost is lower.

[0020] The utility model provides a kind of plugging device of flow resistance film reinforcement, the melting point of the coating material is lower than the melting point of the flow resistance film, when forming reinforcing coating, can adopt: 1, coating material is evenly arranged on flow resistance film first, then coating material is heated, the heating temperature when heating is higher than the melting point of coating material, but less than the melting point of flow resistance film, coating material melts on flow resistance film, and reinforcing coating is formed after cooling.2, utilize mould to spread the coating material of melting on the outer layer of flow resistance film, form reinforcing coating.Using this method, reinforcing coating is more conveniently obtained.

[0021] The utility model provides a kind of plugging device of flow resistance film reinforcement, the coating material is the material quality that can be dissolved by dissolving solvent, and the flow resistance film is insoluble in the dissolving solvent.When forming reinforcing coating, dissolving solvent with coating material is spin-coated on the outer surface of flow resistance film, and coating material can form reinforcing coating on the outer surface of flow resistance film after dissolving solvent precipitation.Using this method, without heating, can effectively protect flow resistance film, prevent adverse effects on flow resistance film by heating.

[0022] The utility model provides a kind of plugging device of flow resistance film reinforcement, the shape and position of reinforcing coating are based on the specific movement stress condition of flow resistance film and are arranged, the stress tear of flow resistance film is rectangle, then reinforcing coating should be the rectangle located at tear position, the stress tear of flow resistance film is circular, then reinforcing coating should be the circular located at tear position.The position of reinforcing coating should be located at stress concentration, can minimize the problem of tear and hole of flow resistance film caused by stress concentration.

[0023] The utility model provides a kind of blocking device of flow resistance film reinforcement, the reinforcing coating is arranged at the edge of the outer surface of flow resistance film, sutured place and perforation, wherein, edge, sutured place and perforation are prone to stress concentration and tear to produce hole, thus need to pay special attention to set reinforcing coating in these positions. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a reinforcing coating distribution schematic diagram of the perforation of the utility model;

[0027] Figure 3 It is a circular reinforcing area distribution schematic diagram of the edge of the utility model;

[0028] Figure 4 It is a rectangular reinforcing area distribution schematic diagram of the edge of the utility model.

[0029] Explanation of reference signs;

[0030] 1, skeleton;2, flow resistance film;3, reinforcing area;4, non-reinforcing area;5, perforation. DETAILED DESCRIPTION

[0031] The technical solutions of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] In the description of the utility model, it should be explained that the orientation or position relationship indicated by terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it needs to explain, unless another explicit stipulation and limit, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model with specific meaning of concrete case.

[0034] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0035] Embodiment

[0036] As Figures 1 to 4 The blocking device reinforced by the flow resistance film comprises:

[0037] A framework 1, which is a net structure with elasticity;

[0038] A flow resistance film 2, which is sewn on the framework 1 by sewing thread, is arranged on the outer side or the inner side of the framework 1, and has perforations 5 for sewing thread sewing on the flow resistance film 2;

[0039] The outer surface of the flow resistance film 2 is provided with a reinforced coating formed by a coating material.

[0040] The framework 1 is a net structure with elasticity, which can be conveniently loaded into a delivery sheath tube. The framework 1 can support the flow resistance film 2. When the delivery sheath tube is located, the framework 1 with the flow resistance film 2 is extruded in a columnar form in the delivery sheath tube. After the blocking device is released, the framework 1 with the flow resistance film 2 is opened under the action of elasticity, so that the flow resistance film 2 resists flow. The reinforced coating can reinforce the surface layer of the flow resistance film 2, increase the mechanical properties at the position of the flow resistance film 2, and prevent the flow resistance film 2 from being torn and holed under the action of stretching and extrusion, so as to ensure the flow resistance effect of the flow resistance film 2. The reinforced coating enhances the wear resistance and tear resistance of the flow resistance film 2, and improves the use reliability of the blocking device without changing the original performance of the flow resistance film 2.

[0041] It should be noted that the reinforced coating can be arranged on part of the flow resistance film 2 or all of the flow resistance film 2. The embodiment is not limited in this way. When the reinforced coating is arranged on part of the flow resistance film 2, part of the flow resistance film 2 is arranged as a reinforced area 3, and the other part is arranged as a non-reinforced area 4. The mechanical properties of the reinforced area 3 are stronger than those of the non-reinforced area 4.

[0042] Further, the coating material is a polymer material. The polymer material used for reinforcing the blocking film 2 is convenient to obtain and has low cost.

[0043] Optionally, the degradation period of the coating material is longer than the degradation period of the blocking film 2. The coating material can be a degradable material such as PCL, PDO and PLGA, or a non-degradable material.

[0044] The reinforcing coating is located on the outside of the blocking film 2, and the degradation has a gradient. The degradation period of the reinforcing coating on the outside is long, and the degradation period of the blocking film 2 on the inside is short. After the occluder is released, the blocking film 2 contacts the tissue to induce and promote tissue regeneration. The reinforcing coating on the outside contacts the blood to enhance the mechanical properties of the blocking film 2 while avoiding the problem of the blocking film 2 degrading too early and falling apart, thereby ensuring the safety of degradation and the effectiveness of the blocking.

[0045] Further, the melting point of the coating material is lower than the melting point of the blocking film 2.

[0046] Further, the reinforcing coating is formed by melting the coating material on the outer surface of the blocking film 2 after heating. When forming the reinforcing coating, the following methods can be used: 1. The coating material is uniformly arranged on the blocking film 2, and then the coating material is heated. The heating temperature is higher than the melting point of the coating material but lower than the melting point of the blocking film 2. The coating material is melted on the blocking film 2, and the reinforcing coating is formed after cooling. 2. The molten coating material is applied to the outer layer of the blocking film 2 using a mold to form the reinforcing coating. This method is convenient to obtain the reinforcing coating.

[0047] Further, the coating material is a material that can be dissolved by a dissolving solvent.

[0048] Further, the blocking film 2 is insoluble in the dissolving solvent.

[0049] Further, the reinforcing coating is formed by spin coating the dissolving solvent containing the coating material on the outer surface of the blocking film 2.

[0050] The coating material is a material that can be dissolved by a dissolving solvent, and the blocking film 2 is insoluble in the dissolving solvent. When forming the reinforcing coating, the dissolving solvent containing the coating material is spin coated on the outer surface of the blocking film 2. After the coating material is precipitated from the dissolving solvent, the reinforcing coating can be formed on the outer surface of the blocking film 2. This method does not require heating, which can effectively protect the blocking film 2 from the adverse effects of heating.

[0051] Further, the shape and position of the reinforcing coating are set based on the stress situation of the movement of the flow resistance film 2. The shape and position of the reinforcing coating are set based on the specific stress situation of the movement of the flow resistance film 2. If the flow resistance film 2 is torn in a rectangular shape, the reinforcing coating should be a rectangular shape at the tearing position. If the flow resistance film 2 is torn in a circular shape, the reinforcing coating should be a circular shape at the tearing position. The position of the reinforcing coating should be at the stress concentration position, so as to minimize the tearing and hole formation of the flow resistance film 2 caused by stress concentration.

[0052] Further, the reinforcing coating is arranged at the edge of the outer surface of the flow resistance film 2, the suture line suture position and the perforation 5. The edge of the flow resistance film 2, the suture line suture position and the perforation 5 are prone to stress concentration and tearing to form holes, so special attention should be paid to arranging the reinforcing coating at these positions. When the reinforcing coating is arranged on part of the flow resistance film 2, the flow resistance film 2 is divided into a reinforcing area 3 and a non-reinforcing area 4, Figure 2 The distribution diagram of the reinforcing coating at the perforation 5 is shown in FIG. 6. Figure 3 The distribution diagram of the circular reinforcing area 3 at the edge is shown in FIG. 7. Figure 4 The distribution diagram of the rectangular reinforcing area 3 at the edge is shown in FIG. 8.

[0053] Obviously, the above embodiments are only examples for clear illustration, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A flow-blocking membrane-reinforced occluder, characterized in that, Comprise: a framework (1) which is a net-like structure with elasticity; a flow resistance film (2) which is sutured on the framework (1) by sutures, the flow resistance film (2) being arranged on the outside or the inside of the framework (1), the flow resistance film (2) having perforations (5) where the sutures are sutured; an outer surface of the flow resistance film (2) is provided with a reinforcing coating formed by a coating material.

2. The flow-blocking membrane-reinforced occluder of claim 1, wherein, The coating material is a high molecular material.

3. The flow-blocking membrane-reinforced occluder of claim 1, wherein, The melting point of the coating material is lower than that of the flow resistance film (2).

4. The flow-blocking membrane-reinforced occluder of claim 3, wherein, The reinforcing coating is formed by melting the coating material after heating on the outer surface of the flow resistance film (2).

5. The flow-blocking membrane-reinforced occluder of claim 1, wherein, The coating material is a material that can be dissolved by a dissolving solvent.

6. The flow-blocking membrane-reinforced occluder of claim 5, wherein, The flow resistance film (2) is insoluble in the dissolving solvent.

7. The flow-blocking membrane-reinforced occluder of claim 5, wherein, The reinforcing coating is formed by spin coating the dissolving solvent with the coating material on the outer surface of the flow resistance film (2).

8. The flow-blocking membrane-reinforced occluder of claim 1, wherein, The shape and position of the reinforcing coating are set based on the motion stress condition of the flow resistance film (2).

9. The flow-blocking membrane-reinforced occluder of claim 1, wherein, The reinforcing coating is arranged at the edge of the outer surface of the flow resistance film (2), the sutured suture and the perforation (5).

Images