Two-layer membrane structure of bronchial valve

Abstract

A two-layer membrane structure of a bronchial valve comprises a stent main body 1 (Figure 1) and a stent membrane 2 (Figure 1). The stent membrane includes an outer stent membrane 201 (Figure 2) and an inner stent membrane 202 (Figure 2); and the outer stent membrane and the inner stent membrane respectively cover an inner side and an outer side of the stent main body. The stent main body may be umbrella-shaped, and may comprise several stents 101, anchor rods 102, and a connecting block 103, through which the stents and anchor rods are welded together. Further attached to the connecting block may be a connecting rod 3 with a withdrawal handle 4. The membrane may be formed from a colloid. It may also be prepared by vulcanising a rubber stock solution, wherein the solution is a polyurethane solution.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of bronchial valve membranes, and particularly to, a two-layer membrane structure of a bronchial valve. BACKGROUND

[0002] A chronic obstructive pulmonary disease such as emphysema is common, which especially occurs among elderly people. Traditionally, therapies for emphysema generally include medical treatment and surgical treatment. The medical treatment includes oxygen inhalation, prevention of pulmonary infection, bronchial spasmolysis, and the like, but the therapeutic effect is extremely limited. The surgical treatment mainly focuses on lung volume reduction surgery, but it also has many limitations, such as strict surgical indications, many complications, anesthesia, anesthesia-related complications, difficulty in predicting preoperative efficacy, postoperative inability to compensate for the unsatisfactory efficacy caused by excessive or insufficient resection, high surgical costs, and great mental and physical pains. In addition, due to a poor lung function, some patients often cannot tolerate the surgery, resulting in a high postoperative death rate, which limits the application of surgical operations. According to statistics, the five-year survival rate of patients with end-stage emphysema is less than 50%. In order to better treat the emphysema, improve the quality of life of patients, and reduce the trauma to patients during surgery, using transbronchoscopic bronchial valve intervention to treat the emphysema has been internationally studied. At present, bronchial valves mainly used in the international market include duckbill bronchial valves and umbrella-shaped bronchial valves.

[0003] A bronchial valve is a one-way valve that treats the chronic obstructive pulmonary disease according to the principle of a one-way air flow. The bronchial valve is composed of two parts: a stent and a membrane. The patent applied for this time is a membrane related technology. The bronchial valve mainly relies on a membrane to prevent air in the lung and bronchus, requiring the membrane to have good flexibility and hardness. However, the membrane needs to contact a surface of the bronchus. An existing bronchial valve membrane is generally a single-layer inner membrane, outside which, a metal abuts against a tracheal wall, so that hardness and good flexibility cannot be balanced. A too hard membrane would frictionize the surface of the bronchus, causing granulation. SUMMARY

[0004] For the technical drawbacks mentioned above, the present disclosure aims to provide a two-layer membrane structure of a bronchial valve, so as to solve the problems mentioned in the background section.

[0005] In order to solve the above technical problems, the present disclosure adopts the following technical solution:

[0006] The present disclosure provides a two-layer membrane structure of a bronchial valve. The two-layer membrane structure includes a stent main body and a stent membrane; the stent membrane includes an outer stent membrane and an inner stent membrane; and the outer stent membrane and the inner stent membrane respectively cover an inner side and an outer side of the stent main body.

[0007] Preferably, the stent main body is of an umbrella-shaped structure.

[0008] Preferably, the stent main body includes several stents, anchor rods, and a connecting block; and the several stents and the anchor rods are welded into a whole through the connecting block.

[0009] Preferably, the connecting block inside the stent main body is welded with a connecting rod; and the connecting rod is connected with a withdrawal handle.

[0010] Preferably, the stent membrane is colloid, with a thickness of 10 to 100 microns.

[0011] Preferably, the stent membrane is prepared by vulcanizing a rubber stock solution, and the rubber stock solution is a polyurethane solution.

[0012] Compared with the prior art, the present disclosure has the following beneficial effects:

[0013] (1) According to the present disclosure, due to a two-layer membrane technology of the inner stent membrane and the outer stent membrane, the inner stent membrane has relatively high hardness, achieving good flexibility and a good supporting effect; the outer stent membrane adopts a softer film; and the two membranes with different hardnesses are composited together, which not only ensures that the product has good performance, but also avoids granulation tissues growing on an inner wall of the bronchus.

[0014] (2) The structure adopted by the present disclosure improves the support force and stability of the stent main body, reducing the damage rate of the inner wall of the bronchus, and reducing the probability of occurrence of bronchitis. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To describe the embodiments of the present disclosure or the technical solutions in the existing art more clearly, drawings required to be used in the embodiments or the illustration of the existing art will be briefly introduced below. Obviously, the drawings in the illustration below are only some embodiments of the present disclosure. Those ordinarily skilled in the art also can acquire other drawings according to the provided drawings without doing creative work.

[0016] FIG. lisa schematic diagram of a three-dimensional structure of the present disclosure;

[0017] FIG. 2 is a schematic enlarged structural diagram of a portion A of the present disclosure;

[0018] FIG. 3 is a schematic diagram of a three-dimensional structure of a stent main body of the present disclosure; and

[0019] FIG. 4 is a sectional diagram of an entire structure of the present disclosure.

[0020] Numerals in the drawings:

[0021] 1: stent main body; 2: stent membrane; 3: connecting rod; 4: withdrawal handle, 101: stent; 102: anchor rod; 103: connecting block; 201: outer stent membrane; and 202: inner stent membrane. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are only part of the embodiments of the present disclosure, not all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative work shall fall within the protection scope of the present disclosure.

[0023] In the description of the present disclosure, it should be understood that orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside" and the like are orientations or positional relationships as shown in the drawings, and are only for the purpose of facilitating and simplifying the description of the present disclosure instead of indicating or implying that devices or elements indicated must have particular orientations, and be constructed and operated in the particular orientations, so that these terms are construed as limiting the present disclosure.

[0024] Embodiments

[0025] As shown in FIG. 1 to FIG. 4, the present disclosure provides a two-layer membrane structure of a bronchial valve. The two-layer membrane structure includes a stent main body 1 and a stent membrane 2; the stent membrane 2 includes an outer stent membrane 201 and an inner stent membrane 202; and the outer stent membrane 201 and the inner stent membrane 202 respectively cover an inner side and an outer side of the stent main body 1.

[0026] Further, the stent main body 1 is of an umbrella-shaped structure.

[0027] Further, the stent main body 1 includes several stents 101, anchor rods 102, and a connecting block 103; and the several stents 101 and the anchor rods 102 are welded into a whole through the connecting block 103.

[0028] Further, a quantity of the stents 101 is six, which is of an overall umbrella-shaped structure. The single stent 101 is an arc long strip.

[0029] Further, a quantity of the anchor rods 102 is five. A tail end of each anchor rod 102 is forked into two sections, one of which is bent.

[0030] Further, the connecting block 103 inside the stent main body 1 is welded with a connecting rod 3; and the connecting rod 3 is connected with a withdrawal handle 4.

[0031] Further, the stent membrane 2 is colloid, with a thickness of 10 to 100 microns.

[0032] Further, the stent membrane 2 is prepared by vulcanizing a rubber stock solution, and the rubber stock solution is a polyurethane solution.

[0033] Working principle:

[0034] The two-layer membrane structure of the bronchial valve of the present disclosure is composed of the frame-type umbrella-shaped stent main body 1 and the stent membrane 2. The stent membrane 2 is divided into an inner layer and an outer layer. The stent membrane 2 is formed into a whole after the rubber stock solution is uniformly smeared on the stent main body 1 and processed. The stent membrane 2 clings to the stent main body 1. Due to the two-layer membrane technology of the inner stent membrane 202 and the outer stent membrane 201, the inner stent membrane 202 has relatively high hardness, achieving good flexibility and a good supporting effect; the outer stent membrane 201 adopts a softer film; and the two membranes with different hardnesses are composited together, which not only ensures that the product has good performance, but also avoids granulation tissues growing on an inner wall of the bronchus. The structure improves the support force and stability of the stent main body 1, reducing the damage rate of the inner wall of the bronchus, and reducing the probability of occurrence of bronchitis.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Therefore, if these changes and transformations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies of the present disclosure, the present disclosure is intended to include these changes and transformations.

Claims

1. A two-layer membrane structure of a bronchial valve, comprising a stent main body (1) and a stent membrane (2), wherein the stent membrane (2) comprises an outer stent membrane (201) and an inner stent membrane (202); and the outer stent membrane (201) and an inner stent membrane (202) respectively cover an inner side and an outer side of the stent main body (1).

2. The two-layer membrane structure of the bronchial valve according to claim 1, wherein the stent main body (1) is of an umbrella-shaped structure.

3. The two-layer membrane structure of the bronchial valve according to claim 1, wherein the stent main body (1) comprises several stents (101), anchor rods (102), and a connecting block (103); and the several stents (101) and the anchor rods (102) are welded into a whole through the connecting block (103).

4. The two-layer membrane structure of the bronchial valve according to claim 3, wherein the connecting block (103) inside the stent main body (1) is welded with a connecting rod (3); and the connecting rod (3) is connected with a withdrawal handle (4).

5. The two-layer membrane structure of the bronchial valve according to claim 1, wherein the stent membrane (2) is colloid, with a thickness of 10 to 100 microns.

6. The two-layer membrane structure of the bronchial valve according to claim 1, wherein the stent membrane (2) is prepared by vulcanizing a rubber stock solution, and the rubber stock solution is a polyurethane solution.

Images