Novel ventricular septum perforation plugging device

Abstract

The utility model relates to the technical field of ventricular septum perforation plugging devices, and discloses a novel ventricular septum perforation plugging device which comprises a fixing column and a first disc-shaped net arranged on the outer side of the fixing column, a connecting waist part is further arranged on the outer side of the fixing column, and the connecting waist part is connected with the first disc-shaped net. A second disc-shaped net is arranged on the side, away from the first disc-shaped net, of the connecting waist part, an end is arranged on one side of the second disc-shaped net, and before use, a small screw at the front end of a transmission steel cable is used for being connected with the end, so that the whole compressed plugging device can be transmitted to a heart defect part through a pipeline; the first disc-shaped net and the second disc-shaped net are used for blocking, the defect part can be blocked, the biological membrane can make contact with the heart defect part, the sealing performance is further improved, meanwhile, the polyurethane coating has certain flexibility, friction between the polyurethane coating and the heart defect part is effectively reduced, and the service life of the heart defect part is prolonged. The heparin coating can reduce the risk of thrombus formation, so that the use risk is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of ventricular septal perforation occlusion devices, specifically a novel ventricular septal perforation occlusion device. Background Technology

[0002] Ventricular septal perforation (also known as ventricular septal defect) is a congenital heart defect. It is a common type of congenital heart disease. The human heart consists of four chambers (left atrium, left ventricle, right atrium, and right ventricle). There should be a complete ventricular septum between the left and right ventricles. If there is an opening in the ventricular septum, it is called a ventricular septal defect. A ventricular septal perforation occluder is a medical device used in interventional cardiac treatment. It is mainly used to close ventricular septal defects (VSD) or other similar heart structural defects. Its function is to place the occluder at the defect site through catheter technology to prevent abnormal blood flow, thereby improving the patient's cardiac function.

[0003] For example, a radiopaque and biodegradable ventricular septal defect occluder with publication number CN205697888U includes a first disc-shaped mesh, a tubular mesh, and a second disc-shaped mesh connected in sequence. The first disc-shaped mesh also has a closing line that passes through all the annular mesh lines, forming a continuous mesh surface on the outer surface of the first disc-shaped mesh after closing. The second disc-shaped mesh has a connector for closing the mesh surface. The connector is formed by thermally melting the mesh body at the center of the inner mesh surface of the second disc-shaped mesh. The materials of the first disc-shaped mesh, the tubular mesh, the second disc-shaped mesh, and the connector are radiopaque and biodegradable materials. The closing line structure of this occluder increases the support and resilience of the occluder, reduces manufacturing difficulty, and lowers manufacturing costs. This invention not only ensures that the radiopaque and biodegradable filaments constituting the disc-shaped mesh are firmly connected together, but also ensures that the connector is firmly connected to the radiopaque and biodegradable filaments constituting the disc-shaped mesh, making it less prone to detachment.

[0004] The aforementioned patent proposes that the connector can be firmly connected to the developable and biodegradable filaments that make up the disc-shaped mesh, making it less likely to fall off and convenient to use. However, during the use of the perforation plug, because the plug is delivered to the defect through the conduit, the contact between the defect and the plug is not tight enough, resulting in a poor sealing effect and affecting its use.

[0005] Therefore, we propose a novel ventricular septal perforation occluder to address the aforementioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a novel ventricular septal perforation occluder to solve the problem mentioned in the background art where, due to the occluder being delivered to the defect site via a catheter, the contact between the occluder and the defect site is not tight enough, resulting in a poor sealing effect and affecting its use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel ventricular septal perforation occluder, comprising a fixed post and a first disc-shaped mesh disposed on the outside of the fixed post. The outside of the fixed post is also provided with a connecting waist, which is connected to the first disc-shaped mesh. A second disc-shaped mesh is disposed on the side of the connecting waist away from the first disc-shaped mesh, and an end is disposed on one side of the second disc-shaped mesh. The fixed post, the first disc-shaped mesh, the connecting waist, the second disc-shaped mesh, and the end are delivered to the defect site using a conduit, and the defect is sealed by means of the first and second disc-shaped meshes.

[0008] A biofilm is provided on the inner side of the first disc-shaped mesh, and a protective coating is provided on the surface of the first disc-shaped mesh. A constriction portion is provided at the center of the first disc-shaped mesh. The constriction portion allows the first disc-shaped mesh to be placed outside the fixing post, and the biofilm can contact the defective part, so that the first disc-shaped mesh is tightly connected to the defective part.

[0009] Preferably, the first and second disc-shaped meshes have the same structure, both made of a shape memory alloy material, and can be restored after being compressed and unfolded.

[0010] Preferably, the protective coating comprises a polyurethane coating, a heparin coating, and a polytetrafluoroethylene coating disposed sequentially from the outside to the inside on the surface of the first disc-shaped mesh. The polyurethane coating has a certain degree of flexibility, the heparin coating can reduce the risk of thrombosis, and the polytetrafluoroethylene coating can reduce friction.

[0011] Preferably, a polyurethane membrane is provided on the outer wall of the connecting waist section, and the polyurethane membrane has good biocompatibility.

[0012] Preferably, the surfaces of the first and second disc meshes are smooth, and one side of the second disc mesh is provided with an end, the surface of which is provided with a threaded hole.

[0013] Preferably, the first and second disc-shaped meshes are symmetrically distributed about the center line connecting the waist.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The device consists of a fixed post, a first disc mesh, a connecting waist section, a second disc mesh, and an end cap. A small screw at the front end of the transmission cable is used to connect the end cap, allowing the entire compressed occluder to be transmitted through a pipeline to the heart defect site. The first and second disc meshes are used for occlusion, effectively sealing the defect site. The biofilm further enhances the sealing performance by contacting the heart defect site, facilitating occlusion. Simultaneously, the polyurethane coating provides flexibility, effectively reducing friction with the heart defect site and thus lowering the risk of failure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first disc-shaped mesh structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the protective coating structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the closing part structure of this utility model.

[0020] In the diagram: 1. Fixed column; 2. First disc mesh; 21. Biofilm; 22. Protective coating; 221. Polyurethane coating; 222. Heparin coating; 223. Polytetrafluoroethylene coating; 23. Closure section; 3. Connecting waist section; 31. Polyurethane membrane; 4. Second disc mesh; 5. End. Detailed Implementation

[0021] 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.

[0022] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4A novel ventricular septal perforation occluder includes a fixed post 1 and a first disc mesh 2 disposed on the outside of the fixed post 1. A connecting waist 3 is also disposed on the outside of the fixed post 1, and the connecting waist 3 is connected to the first disc mesh 2. A second disc mesh 4 is disposed on the side of the connecting waist 3 away from the first disc mesh 2, and an end 5 is disposed on one side of the second disc mesh 4. The fixed post 1, the first disc mesh 2, the connecting waist 3, the second disc mesh 4 and the end 5 are delivered to the defect site through a conduit, and the defect site is sealed with the help of the first disc mesh 2 and the second disc mesh 4.

[0023] A biofilm 21 is provided on the inner side of the first disc-shaped mesh 2, and a protective coating 22 is provided on the surface of the first disc-shaped mesh 2. A constriction portion 23 is provided at the center of the first disc-shaped mesh 2. The constriction portion 23 allows the first disc-shaped mesh 2 to be placed outside the fixing post 1. The biofilm 21 can contact the damaged part, effectively increasing the overall sealing performance between the whole and the damaged part, making it convenient to use. When the first disc-shaped mesh 2 comes into contact with the damaged part, the protective coating 22 can reduce damage to the damaged part.

[0024] The first disc-shaped mesh 2 and the second disc-shaped mesh 4 have the same structure, both made of a shape memory alloy material. The first disc-shaped mesh 2 and the second disc-shaped mesh 4 can be restored after being compressed and unfolded.

[0025] The protective coating 22 includes a polyurethane coating 221, a heparin coating 222, and a polytetrafluoroethylene coating 223, which are sequentially disposed on the surface of the first disc mesh 2 from the outside to the inside. The polyurethane coating 221 has a certain degree of flexibility, which effectively reduces friction with the heart defect. The heparin coating 222 can reduce the risk of thrombosis. The polytetrafluoroethylene coating 223 can reduce friction and reduce irritation.

[0026] A polyurethane membrane 31 is provided on the outer wall of the waist section 3. The polyurethane membrane 31 has good biocompatibility and can reduce stimulation to heart tissue.

[0027] The surfaces of the first disc mesh 2 and the second disc mesh 4 are smooth, which can avoid scratching the heart defect. One side of the second disc mesh 4 is provided with an end 5, and the surface of the end 5 is provided with a threaded hole. Before use, the small screw at the front end of the transmission steel cable is connected to the end 5, so that the entire compressed occluder can be transmitted to the heart defect through the pipeline.

[0028] The first disc mesh 2 and the second disc mesh 4 are symmetrically distributed about the center line connecting the waist 3.

[0029] In this embodiment: Before use, a small screw at the front end of the transmission cable is connected to the end 5, allowing the entire compressed occluder to be transmitted through the pipeline to the heart defect site. The first disc mesh 2 and the second disc mesh 4 are used for sealing, which can seal the defect site. The biofilm 21 can contact the heart defect site, further increasing the sealing performance and facilitating sealing. At the same time, the polyurethane coating 221 has a certain degree of flexibility, which effectively reduces friction with the heart defect site. The heparin coating 222 can reduce the risk of thrombosis, and the polytetrafluoroethylene coating 223 can reduce friction and irritation. The connecting waist 3 is placed at the defect site. With the help of the polyurethane membrane 31 with good biocompatibility, the stimulation to the heart tissue can be reduced, thereby reducing the risk of use and making it convenient to use.

[0030] Working principle: Before use, a small screw at the front end of the transmission cable is connected to end 5, allowing the entire compressed occluder to be transmitted through the pipeline to the heart defect. The first disc mesh 2 and the second disc mesh 4 are used for sealing, which can seal the defect. The biofilm 21 can contact the heart defect. At the same time, the polyurethane coating 221 has a certain degree of flexibility, which effectively reduces friction with the heart defect. The heparin coating 222 can reduce the risk of thrombosis, and the polytetrafluoroethylene coating 223 can reduce friction and irritation.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel ventricular septal perforation occluder, comprising a fixed post (1) and a first disc-shaped mesh (2) disposed outside the fixed post (1), characterized in that: The outer side of the fixed column (1) is also provided with a connecting waist (3), which is connected to the first disc mesh (2). A second disc mesh (4) is provided on the side of the connecting waist (3) away from the first disc mesh (2), and an end (5) is provided on the side of the second disc mesh (4). A biofilm (21) is provided on the inner side of the first disc-shaped mesh (2), a protective coating (22) is provided on the surface of the first disc-shaped mesh (2), and a closing part (23) is provided at the center of the first disc-shaped mesh (2). The first disc-shaped mesh (2) can be placed on the outside of the fixing column (1) through the closing part (23), and the biofilm (21) can contact the defective part.

2. The novel interventricular septal perforation occlusion device according to claim 1, characterized in that: The first disc mesh (2) and the second disc mesh (4) have the same structure and are both made of a shape memory alloy material.

3. The novel interventricular septal perforation occlusion device according to claim 2, characterized in that: The protective coating (22) includes a polyurethane coating (221), a heparin coating (222) and a polytetrafluoroethylene coating (223) disposed sequentially from the outside to the inside on the surface of the first disc mesh (2).

4. The novel interventricular septal perforation occluder according to claim 3, characterized in that: A polyurethane membrane (31) is provided on the outer wall of the connecting waist (3).

5. A novel interventricular septal perforation occlusion device according to claim 4, characterized in that: The surfaces of the first disc mesh (2) and the second disc mesh (4) are smooth, and an end (5) is provided on one side of the second disc mesh (4).

6. A novel interventricular septal perforation occlusion device according to claim 5, characterized in that: The first disc mesh (2) and the second disc mesh (4) are symmetrically distributed about the center line connecting the waist (3).

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