Ablation stent with dense ablation net for treating bronchitis

Abstract

The utility model discloses an ablation stent with a dense ablation net for treating bronchitis, which comprises a stent main body and the dense ablation net, a layer of dense ablation net is covered or woven on the periphery of the stent main body, in order to achieve higher metal coverage rate, the number of woven strands of the stent is increased, and in order to press and hold the stent to a set diameter, the number of woven strands of the stent is increased. The purpose of combining the thickness of the weaving wires is to reduce the diameter after pressing and holding. Equivalently, the number of strands of one part of the original knitting filaments is increased, and the size is reduced, so that the metal coverage rate is increased while the outer diameter of the stent after being pressed and held is not changed; the thick wires can provide radial supporting force, and the thin wires can increase the metal coverage rate of the stent.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an ablation stent with an ablation dense net for treating bronchitis. Background Art

[0002] Currently, pulsed electric fields are used to treat chronic bronchitis by ablation in the lower respiratory tract and bronchial tubes of the lungs. The specific operation is to use a metal stent to abut against the bronchial tubes and electrodes connected to the outside of the human body to form a high-voltage electric field to cause irreversible perforation of the cell membrane of the bronchial epithelial cells for ablation. During ablation, the stent must be completely attached to the bronchial wall and cover as much tissue as possible.

[0003] When in use, the catheter needs to pass through the working channel of the bronchoscope and reach the predetermined position of the bronchus. Therefore, the maximum outer diameter of the catheter after compression and gripping is limited by the inner diameter of the bronchial working channel. Therefore, the selection and number of wire diameters have a design upper limit. The number of braided wires is generally restricted by the equipment, and the number generally changes at characteristic numerical points. If coarse braids are selected, the number will decrease, the radial force will be relatively large, and the metal coverage will decrease; if fine braids are selected, the number will increase, the metal coverage will increase, and the radial force will be relatively small. Therefore, it is necessary to design a new ablation dense mesh structure. Utility Model Content

[0004] The purpose of the utility model is to provide an ablation stent for treating bronchitis with an ablation dense mesh to solve the problems existing in the above-mentioned prior art. The use of a combination of coarse and fine weaving methods can not only meet the transportation requirements, but also achieve a balance between radial support force and metal coverage.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solutions: The present invention provides an ablation stent for treating bronchitis with an ablation dense mesh, comprising:

[0006] The stent body is elastic and has a closed-loop design; when not in use, the stent body is compressed in the bronchoscope; during the ablation process, the stent body is attached to the bronchial wall;

[0007] Ablation dense mesh: the outer periphery of the stent body is covered with a layer of ablation dense mesh, and the ablation dense mesh includes thick filaments and thin filaments woven together in an offset manner.

[0008] Preferably, the warp threads of the ablation dense mesh are made of the thick filaments, and the weft threads of the ablation dense mesh are made of the thin filaments, and the thick filaments and the thin filaments are interwoven together.

[0009] Preferably, the ablation dense mesh is a woven mesh made of metal material.

[0010] Preferably, the bracket body is an integrated laser engraved bracket.

[0011] Compared with the prior art, the utility model has achieved the following beneficial technical effects:

[0012] The ablation stent for treating bronchitis with ablation dense mesh in the utility model includes a stent body and ablation dense mesh. A layer of ablation dense mesh is covered or woven on the periphery of the stent body. In order to achieve a higher metal coverage rate, the stent increases the number of woven strands. At the same time, in order to be able to press and grip to a set diameter, the braided wire has a combination of coarse and fine strands to reduce the diameter after pressing and gripping. This is equivalent to increasing the number of strands and reducing the size of the braided wire with a part of the coarse strands of the original braided wire, so as to increase the metal coverage rate while not changing the outer diameter of the stent after pressing and gripping; the coarse wire plays a greater role in providing radial support, and the thin wire plays a greater role in increasing the metal coverage rate of the stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the weaving form of the ablation dense mesh on the periphery of the ablation stent;

[0015] Among them, 1. thick filaments; 2. thin filaments. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The purpose of the utility model is to provide an ablation stent for treating bronchitis with an ablation dense mesh to solve the problems existing in the above-mentioned prior art. The use of a combination of coarse and fine weaving methods can not only meet the transportation requirements, but also achieve a balance between radial support force and metal coverage.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figure 1 As shown, the utility model provides an ablation stent for treating bronchitis with an ablation dense mesh, comprising:

[0020] The stent body is elastic and has a closed-loop design. When not in use, the stent body is compressed in the bronchoscope. During the ablation process, the stent body is attached to the bronchial wall.

[0021] Ablation dense mesh: the outer periphery of the stent body is covered with a layer of ablation dense mesh, and the ablation dense mesh includes thick filaments 1 and thin filaments 2 that are staggered and woven together.

[0022] In one embodiment, the warp threads of the ablation dense mesh are thick threads 1 , and the weft threads of the ablation dense mesh are thin threads 2 , and the thick threads 1 and the thin threads 2 are interwoven together.

[0023] In one embodiment, the ablation mesh is a woven mesh made of metal.

[0024] Increasing the electric field coverage during ablation can reduce voltage output, increase surgical safety, and reduce the incidence of adverse events during surgery. The ablation stent in the utility model has improved the ablation dense mesh, that is, the metal braided mesh, and optimized the original weaving method; for example, the original design was woven with 24 wires with a diameter of 0.20 mm, and now 12 wires with a diameter of 0.20 mm are replaced with 18 or 24 wires with a smaller diameter, such as 0.15 mm, for mixed weaving. The purpose of using thin wires 2 and thick wires 1 to mix is ​​to use the thick wires 1 to increase the radial force of the ablation stent, and use the thin wires 2 to fill the weaving gaps to increase the metal coverage of the stent.

[0025] The number of spindles in the braiding equipment currently on the market is usually a multiple of 8, so the increase in the number of strands is subject to certain restrictions. For example, if a 32-strand stent wants to increase the number of strands, it must be 32+8*N=40, 48, 56, 64, etc. In order to achieve better support force, the best design for a braided stent is a one-to-one design, so a braided stent with 48 strands requires a braiding machine with 96 spindles. Currently, there are only a few types of equipment, and they do not cover all spindle numbers. To achieve a certain grip size and meet good radial support force and metal coverage, the design route cannot be single. As long as the braiding method meets the requirements of mixed coarse and fine braiding, it is within the protection scope of this utility model.

[0026] Compared with traditional designs, stents used for ablation are all meshes of cross-woven wires of uniform diameter. If the wire diameter is large, the radial support force will be greater, but the overall flexibility is poor, and the compliance of tortuous tissues decreases. Since the wire diameter is large and difficult to bend, the weaving density cannot be very dense. If the wire diameter is small, the overall flexibility increases, but the radial support force decreases, and the contact force between the stent and the tissue will also decrease, affecting the effectiveness of the product. The ablation stent for treating bronchitis with an ablation dense mesh in the utility model is a mixed weaving of thick wires 1 and thin wires 2. The thick wires 1 provide radial support for the stent, and the number of thin wires 2 is increased to increase the metal coverage of the stent. After design, it can also meet the same compression grip diameter as before; it can meet the delivery requirements and achieve a balance between the radial support force and the metal coverage.

[0027] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0028] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An ablation stent for treating bronchitis with an ablation dense mesh, characterized in that: include: A support body, wherein the support body is elastic and has a closed-loop design; When not in use, the stent body is compressed in the bronchoscope; During the ablation process, the stent body is pressed against the bronchial wall; Ablation dense mesh: the outer periphery of the stent body is covered with a layer of ablation dense mesh, and the ablation dense mesh includes thick filaments and thin filaments woven together in an offset manner.

2. The ablation stent with a dense ablation mesh for treating bronchitis according to claim 1, characterized in that: The warp threads of the ablation dense net are made of the thick filaments, and the weft threads of the ablation dense net are made of the thin filaments, and the thick filaments and the thin filaments are interwoven together.

3. The ablation stent with a dense ablation mesh for treating bronchitis according to claim 1, characterized in that: The ablation dense mesh is a woven mesh made of metal material.

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