Covered stent

Abstract

The utility model provides a covered stent, which relates to the technical field of covered stents.The covered stent comprises a silicone membrane stent, a reinforcing and supporting device is arranged on the inner wall of the silicone membrane stent, an auxiliary device is arranged on the outer surface of the silicone membrane stent, the reinforcing and supporting device comprises a plurality of elastic supporting nets and a plurality of connecting rods, according to the utility model, the reinforcing and supporting device is arranged, so that the wall thickness of a traditional silicone stent can be changed into a thin film shape in order to be convenient to implant and use; then the inner wall of the silicone membrane stent is supported and reinforced by the elastic supporting net connected by the plurality of connecting rods, so that the implantation difficulty of the silicone membrane stent can be reduced, the silicone membrane stent is convenient to mount, meanwhile, the situation that granulation is proliferated on the tube wall due to stimulation caused by direct contact between the elastic supporting net and the tube cavity can be avoided, the service life is prolonged, and the practicability is high. The treatment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of covered stent technology, and in particular to a covered stent. Background Technology

[0002] A membrane-covered scaffold typically consists of a metal scaffold and a membrane material covering its surface. The metal scaffold provides the necessary support, while the membrane material has specific biocompatibility and functionality.

[0003] Commonly used covered stents are generally divided into silicone stents and metal covered stents. Traditional silicone stents have relatively thick walls, making implantation more difficult and requiring a certain level of skill from the doctor. They are also inconvenient to install. On the other hand, the metal mesh on metal covered stents has larger pores that come into direct contact with the lumen, which can easily irritate the vessel wall and cause granulation tissue to grow. They also have a shorter lifespan and need to be replaced regularly, resulting in higher treatment costs and inconvenience. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a film-coated support.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a film-coated support, comprising a silicone film support, wherein a reinforcing support device is provided on the inner wall of the silicone film support, and an auxiliary device is provided on the outer surface of the silicone film support. The reinforcing support device comprises several elastic support nets and several connecting rods. The two ends of the several connecting rods are respectively fixedly connected to one side of two adjacent elastic support nets. Several rectangular blocks are fixedly connected to one side of the two elastic support nets. A locking block is fixedly connected to one side of the rectangular blocks. Several locking slots are provided on the inner walls of both ends of the silicone film support, and the locking blocks are inserted into the inner walls of the locking slots.

[0006] The effects achieved by the above components are as follows: By setting up a reinforcement and support device, the traditional silicone stent wall thickness can be changed to a thin film for easy implantation. Then, an elastic support net connected by several connecting rods is installed into the inner wall of the silicone stent to a certain position. After the elastic support net is reset, its outer surface will be tightly attached to the inner wall of the silicone stent for support and reinforcement. At the same time, the rectangular blocks and locking blocks on one side of the elastic support net at both ends are aligned with the locking grooves on the silicone stent and locked in, thereby fixing the elastic support net and connecting rods to the inner wall of the silicone stent for a second time, making it less prone to shaking during support and reinforcement. This operation can reduce the difficulty of silicone stent implantation, facilitate its installation, and avoid the elastic support net directly contacting the lumen, which could cause irritation and granulation tissue growth on the lumen wall. This increases the service life, reduces treatment costs, and makes it more convenient to use.

[0007] Preferably, the elastic support mesh is corrugated, and the material of the elastic support mesh is a nickel-titanium shape memory alloy.

[0008] The effects achieved by the above components are as follows: by setting the elastic support mesh in a corrugated shape, the support area inside the silicone membrane stent can be increased, and the reinforcement and support effect can be improved. At the same time, the nickel-titanium shape memory alloy has shape memory effect and super elasticity, which can restore the original shape after being subjected to external force, making it easy to implant and install.

[0009] Preferably, both ends of the connecting rod are fixedly connected to a reinforcing rod, and one side of the reinforcing rod is fixedly connected to one side of the elastic support net.

[0010] The effect achieved by the above components is that by setting up reinforcing rods, the connection area between the reinforcing rods and the elastic support net can be increased, making the connection more secure and less prone to breakage, thereby improving the effect of support and reinforcement.

[0011] Preferably, the connecting rods are arranged at equal intervals, and the elastic support nets are arranged at equal intervals.

[0012] The effect achieved by the above components is that by arranging the connecting rods and elastic support nets at equal intervals, the support force at each position is consistent when they support the inner wall of the silicone film support, resulting in more stable support.

[0013] Preferably, the auxiliary device includes several longitudinal anti-slip bars, one side of which is fixedly connected to the outer surface of the silicone film support, and the several longitudinal anti-slip bars are arranged at equal intervals.

[0014] The effect achieved by the above components is that by setting longitudinal anti-slip bars, the contact friction of the outer surface of the silicone membrane support can be increased, so that when the silicone membrane support is placed in the cavity for support, the outer surface is more firmly attached to the cavity wall and is less likely to shift.

[0015] Preferably, a plurality of transverse anti-slip bars are fixedly connected between two adjacent longitudinal anti-slip bars, and the outer surface of the transverse anti-slip bars is fixedly connected to the outer surface of the silicone film support.

[0016] The effect achieved by the above components is that by setting the transverse anti-slip bar, the transverse contact friction of the outer surface of the silicone film support can be increased, making it less prone to misalignment and movement.

[0017] Preferably, the longitudinal section of the longitudinal anti-slip bar is trapezoidal, and the dimension of the end of the longitudinal anti-slip bar away from the silicone film support is smaller than the dimension of the other end.

[0018] The effect achieved by the above components is that by setting the longitudinal anti-slip bar in a trapezoidal shape, its two ends can be inclined, which facilitates the installation and implantation of silicone membrane stents, reduces the stimulation of the tube wall at both ends, and makes it convenient to use.

[0019] Preferably, a plurality of anti-slip protrusions are fixedly connected to one side of the longitudinal anti-slip rod, and the anti-slip protrusions are disposed on the side of the longitudinal anti-slip rod away from the silicone film support.

[0020] The effect achieved by the above components is that by setting anti-slip protrusions, the contact friction on one side of the longitudinal anti-slip rod can be increased, making it easier to fix to the cavity wall and making its silicone membrane support more secure.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, by setting up a reinforcement support device, the traditional silicone stent wall thickness can be changed to a thin film for easy implantation. Then, an elastic support net connected by several connecting rods is used to support and reinforce its inner wall. This reduces the difficulty of silicone membrane stent implantation, makes it easier to install, and avoids direct contact between the elastic support net and the lumen, which could cause irritation and lead to granulation tissue growth on the lumen wall. This increases the service life, reduces treatment costs, and makes it more convenient to use. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the silicone membrane support of this utility model;

[0025] Figure 3 for Figure 2 A three-dimensional schematic diagram of the middle section structure;

[0026] Figure 4 This is a three-dimensional structural diagram of the elastic support mesh of this utility model;

[0027] Figure 5 for Figure 4 A three-dimensional schematic diagram of the middle section.

[0028] Legend: 1. Silicone film support; 2. Reinforcing support device; 3. Auxiliary device; 21. Elastic support net; 22. Connecting rod; 23. Reinforcing rod; 24. Rectangular block; 25. Locking block; 26. Locking groove; 31. Longitudinal anti-slip bar; 32. Transverse anti-slip bar; 33. Anti-slip protrusion. Detailed Implementation

[0029] Example 1, such as Figure 1-5As shown, a film-coated support includes a silicone film support 1. The inner wall of the silicone film support 1 is provided with a reinforcing support device 2, and the outer surface of the silicone film support 1 is provided with an auxiliary device 3. The reinforcing support device 2 includes several elastic support nets 21 and several connecting rods 22. The two ends of the several connecting rods 22 are respectively fixedly connected to one side of two adjacent elastic support nets 21. Several rectangular blocks 24 are fixedly connected to one side of the two elastic support nets 21, and a locking block 25 is fixedly connected to one side of the rectangular block 24. Several slots 26 are opened on the inner walls of both ends of the silicone film support 1, and the locking block 25 is inserted into the inner wall of the slot 26. To facilitate implantation, the traditional silicone stent wall thickness can be modified into a thin film. Then, an elastic support net 21, connected by several connecting rods 22, is installed into the inner wall of the silicone stent 1 at a specific position. After the elastic support net 21 is repositioned, its outer surface will adhere tightly to the inner wall of the silicone stent 1 for support and reinforcement. Simultaneously, the rectangular blocks 24 and locking blocks 25 on one side of the elastic support net 21 at both ends are aligned with the locking grooves 26 on the silicone stent 1 and engaged. This secondary fixation of the elastic support net 21 and connecting rods 22 to the inner wall of the silicone stent 1 prevents wobbling during support and reinforcement. This operation reduces the difficulty of implanting the silicone stent 1, facilitates its installation, and avoids direct contact between the elastic support net 21 and the lumen, which could cause irritation and granulation tissue growth on the lumen wall. This extends the lifespan of the stent, reduces treatment costs, and improves ease of use.

[0030] Reference Figure 4 and Figure 5 As shown, this embodiment discloses a corrugated elastic support mesh 21 made of nickel-titanium shape memory alloy. By making the elastic support mesh 21 corrugated, the support area inside the silicone membrane scaffold 1 can be increased, improving the reinforcement and support effect. Simultaneously, the nickel-titanium shape memory alloy has shape memory effect and superelasticity, allowing it to recover its original shape after being subjected to external force, facilitating implantation and installation. Reinforcing rods 23 are fixedly connected to both ends of the connecting rod 22, with one side of the reinforcing rod 23 fixedly connected to one side of the elastic support mesh 21. By setting the reinforcing rod 23, the connection area between the reinforcing rod 23 and the elastic support mesh 21 scaffold can be increased, making the connection more secure and less prone to breakage, thus improving the support and reinforcement effect.

[0031] Reference Figure 4 and Figure 5 As shown, this embodiment discloses a plurality of connecting rods 22 arranged at equal intervals and a plurality of elastic support nets 21 arranged at equal intervals. By arranging the connecting rods 22 and the elastic support nets 21 at equal intervals, the supporting force at each position is consistent when they support the inner wall of the silicone film support 1, resulting in more stable support.

[0032] Reference Figure 2 and Figure 3 As shown, this embodiment discloses an auxiliary device 3 comprising several longitudinal anti-slip rods 31. One side of each longitudinal anti-slip rod 31 is fixedly connected to the outer surface of the silicone film support 1, and the longitudinal anti-slip rods 31 are arranged at equal intervals. By setting the longitudinal anti-slip rods 31, the contact friction of the outer surface of the silicone film support 1 can be increased, making the outer surface of the silicone film support 1 adhere more firmly to the cavity wall and less prone to displacement when placed in the cavity for support. Several transverse anti-slip rods 32 are fixedly connected between two adjacent longitudinal anti-slip rods 31, and the outer surface of the transverse anti-slip rods 32 is fixedly connected to the outer surface of the silicone film support 1. By setting the transverse anti-slip rods 32, the transverse contact friction of the outer surface of the silicone film support 1 can be increased, making it less prone to misalignment.

[0033] Reference Figure 2 and Figure 3 As shown, this embodiment discloses that the longitudinal anti-slip rod 31 has a trapezoidal cross-section, with the end of the longitudinal anti-slip rod 31 furthest from the silicone membrane support 1 having a smaller dimension than the other end. By setting the longitudinal anti-slip rod 31 in a trapezoidal shape, its two ends can be inclined, facilitating the installation and implantation of the silicone membrane support 1, reducing irritation to the tube wall at both ends, and making it convenient to use. Several anti-slip protrusions 33 are fixedly connected to one side of the longitudinal anti-slip rod 31, and the anti-slip protrusions 33 are located on the side of the longitudinal anti-slip rod 31 furthest from the silicone membrane support 1. By setting the anti-slip protrusions 33, the contact friction on one side of the longitudinal anti-slip rod 31 can be increased, making it easier to fix to the tube wall and making the silicone membrane support 1 more firmly installed.

[0034] Working principle: To facilitate implantation, the traditional silicone stent wall thickness can be modified into a thin film. Then, an elastic support net 21, connected by several connecting rods 22, is installed into the inner wall of the silicone stent 1 at a certain position. After the elastic support net 21 is reset, its outer surface will tightly adhere to the inner wall of the silicone stent 1 for support and reinforcement. Simultaneously, the rectangular blocks 24 and locking blocks 25 on one side of the elastic support net 21 at both ends are aligned with the locking grooves 26 on the silicone stent 1 and inserted. This secondary fixation of the elastic support net 21 and connecting rods 22 to the inner wall of the silicone stent 1 prevents shaking during support and reinforcement. This operation reduces the difficulty of silicone stent 1 implantation, facilitates installation, and avoids direct contact between the elastic support net 21 and the lumen, preventing irritation and granulation tissue formation on the lumen wall. This extends the service life, reduces treatment costs, and improves ease of use.

[0035] After implantation, the longitudinal anti-slip bar 31, the transverse anti-slip bar 32, and the anti-slip protrusion 33 on the outer surface of the silicone membrane stent 1 can be tightly attached to the inner wall of the lumen, making the installation more secure and less prone to movement or misalignment, thus facilitating use.

Claims

1. A coated scaffold, comprising a silicone membrane scaffold (1), characterized in that: The inner wall of the silicone membrane support (1) is provided with a reinforcing support device (2), and the outer surface of the silicone membrane support (1) is provided with an auxiliary device (3). The reinforcing support device (2) includes several elastic support nets (21) and several connecting rods (22). The two ends of the several connecting rods (22) are respectively fixedly connected to one side of two adjacent elastic support nets (21). Several rectangular blocks (24) are fixedly connected to one side of the two elastic support nets (21), and a locking block (25) is fixedly connected to one side of the rectangular block (24). Several slots (26) are opened on the inner walls of both ends of the silicone membrane support (1), and the locking block (25) is inserted into the inner wall of the slot (26).

2. The covered stent according to claim 1, characterized in that: The elastic support mesh (21) is corrugated and is made of nickel-titanium shape memory alloy.

3. A covered stent according to claim 1, characterized in that: Both ends of the connecting rod (22) are fixedly connected to the reinforcing rod (23), and one side of the reinforcing rod (23) is fixedly connected to one side of the elastic support net (21).

4. A covered stent according to claim 1, characterized in that: Several of the connecting rods (22) are arranged at equal distances, and several of the elastic support nets (21) are arranged at equal distances.

5. A covered stent according to claim 1, characterized in that: The auxiliary device (3) includes several longitudinal anti-slip rods (31), one side of which is fixedly connected to the outer surface of the silicone film support (1), and the several longitudinal anti-slip rods (31) are arranged at equal distances.

6. A covered stent according to claim 5, characterized in that: A plurality of transverse antislip rods (32) are fixedly connected between two adjacent longitudinal antislip rods (31), and the outer surface of the transverse antislip rods (32) is fixedly connected to the outer surface of the silicone film support (1).

7. A covered stent according to claim 5, characterized in that: The longitudinal section of the longitudinal anti-slip bar (31) is trapezoidal, and the dimension of the end of the longitudinal anti-slip bar (31) away from the silicone film support (1) is smaller than the dimension of the other end.

8. A covered stent according to claim 5, characterized in that: A number of anti-slip protrusions (33) are fixedly connected to one side of the longitudinal anti-slip rod (31), and the anti-slip protrusions (33) are arranged on the side of the longitudinal anti-slip rod (31) away from the silicone film support (1).

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