A degradable bronchoesophageal fistula occluder

Abstract

The utility model belongs to medical plugging ware technical field, concretely relates to a degradable bronchoesophageal fistula plugging ware, including mounting rod, telescopic cover, check ring and coating, mounting rod both ends are all provided with the connecting sleeve, the utility model discloses a mounting rod, telescopic cover, check ring and connecting sleeve are all degradable material, the internal thread of connecting sleeve is connected to the external implant, and the device is sent into the specified position with the help of endoscope can be plugged to fistula, and the degradation of mounting rod, telescopic cover, check ring and connecting sleeve is helpful to the healing of fistula, and the integrated design of mounting rod, check ring and connecting sleeve is suitable for mass production and rapid production, by setting up the coating, the component of coating is rapamycin, and the coating is helpful to acting on fistula lesion position during plugging and degradation, promotes granulation tissue proliferation, and improves the healing speed of fistula.

Description

Technical Field

[0001] This invention belongs to the field of medical occlusion technology, specifically relating to a biodegradable bronchoesophageal fistula occluder. Background Technology

[0002] A bronchoesophageal fistula is an abnormal passage formed between the esophagus and the bronchi. This passage causes food, saliva, or stomach contents to leak abnormally into the respiratory tract, leading to serious infection or difficulty breathing. Bronchoesophageal fistulas can be classified as congenital or acquired according to their etiology, with acquired fistulas being more common.

[0003] Benign bronchoesophageal fistulas have the potential to heal, but currently, metal stents are used to seal the fistula opening to prevent the reflux of gastric contents into the airway. However, the metal stents prevent the fistula from healing. Utility Model Content

[0004] The purpose of this invention is to provide a biodegradable bronchoesophageal fistula occluder, which solves the problem in the existing technology where metal occluders are used to seal the fistula opening to prevent gastric contents from refluxing into the airway, and the fistula opening cannot heal due to the metal occluder.

[0005] The specific technical solution adopted in this utility model is as follows: A biodegradable bronchoesophageal fistula occluder, comprising: The mounting rod has connecting sleeves at both its left and right ends, which are used to connect the mounting rod to an external inserter. A telescopic sleeve is fitted onto the outside of the mounting rod. When the telescopic sleeve contracts, it expands outward to seal the fistula. A limiting ring is symmetrically arranged on the outside of the mounting rod. The limiting ring is used to limit the position of the telescopic sleeve relative to the mounting rod. A coating is applied to the outer surface of the telescopic sleeve, and the coating is used to improve the speed of fistula healing.

[0006] In a preferred embodiment, the outer side of the mounting rod is fixedly connected to the limiting ring, and the sides of the limiting ring that are close to each other are respectively attached to the left and right sides of the telescopic sleeve.

[0007] In a preferred embodiment, the sides of the connecting sleeve are fixedly connected to the left and right sides of the mounting rod, and at least one side of the connecting sleeve is provided with an internal thread.

[0008] In a preferred embodiment, the mounting rod, the limiting ring, and the connecting sleeve are all made of polylactic acid.

[0009] In a preferred embodiment, the material of the telescopic sleeve is a polylactic acid-polyamide blend.

[0010] In a preferred embodiment, the coating is composed of rapamycin.

[0011] The technical effects achieved by this utility model are as follows: This invention features an installation rod, a telescopic sleeve, a limiting ring, and a connecting sleeve. All components are made of biodegradable materials. The connecting sleeve is connected to an external inserter via its internal thread. By using an endoscope, the device can be inserted into a designated position to seal the fistula. The biodegradability of the installation rod, telescopic sleeve, limiting ring, and connecting sleeve promotes fistula healing. The integrated design of the installation rod, limiting ring, and connecting sleeve is suitable for mass production and rapid manufacturing. This invention utilizes a coating composed of rapamycin. This coating helps to act on the fistula lesion site during sealing and degradation, promoting granulation tissue proliferation and accelerating fistula healing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the disassembled structure of the mounting rod and telescopic sleeve of this utility model; Figure 2 This is a schematic diagram of the combined structure of the mounting rod and telescopic sleeve of this utility model; Figure 3 This is a schematic diagram of the front view sectional structure of this utility model.

[0013] The attached diagram lists the components represented by each number as follows: 1. Mounting rod; 2. Telescopic sleeve; 3. Limiting ring; 4. Connecting sleeve; 5. Coating. Detailed Implementation

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0017] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0018] Please see the appendix Figure 1 As shown, this utility model provides a biodegradable bronchoesophageal fistula occluder, comprising: an installation rod 1, a telescopic sleeve 2, a limiting ring 3, and a coating 5, with connecting sleeves 4 provided at both ends of the installation rod 1.

[0019] In a preferred embodiment, please refer to Figures 1 to 3 The outer side of the mounting rod 1 is fitted with a telescopic sleeve 2. The material of the telescopic sleeve 2 is a polylactic acid-polyamide blend. Polylactic acid-polyamide blend is a composite material that combines the properties of polylactic acid and polyamide. While improving the elasticity of polylactic acid, it retains its biodegradability and has good biocompatibility. The telescopic sleeve 2 can shrink under pressure and can expand outward when there is no force or the force is reduced.

[0020] In a preferred embodiment, please refer to Figures 1 to 3 The outer side of the mounting rod 1 is provided with symmetrical limiting rings 3. The outer side of the mounting rod 1 is fixedly connected to the limiting rings 3. The sides of the limiting rings 3 that are close to each other are respectively close to the left and right sides of the telescopic sleeve 2. The limiting rings 3 are used to limit the position of the telescopic sleeve 2 relative to the mounting rod 1, so as to prevent the telescopic sleeve 2 from moving relative to the mounting rod 1.

[0021] In a preferred embodiment, please refer to Figures 1 to 3 The left and right sides of the mounting rod 1 are fixedly connected to the sides of the connecting sleeve 4, and at least one side of the connecting sleeve 4 is provided with an internal thread. The connecting sleeve 4 is used to connect the mounting rod 1 to the external inserter.

[0022] In this embodiment, the internal thread of the connecting sleeve 4 is connected to the external thread of the external inserter, thereby connecting to the front end of the inserter. It is radially compressed and retracted into the inserter. The device is inserted into the designated position of the fistula using endoscopic forceps. Under direct endoscopic visualization, the outer tube of the inserter is withdrawn, allowing the telescopic sleeve 2 to open and seal the fistula. The inner rod of the inserter is rotated to separate the inserter from the connecting sleeve 4. Then, the inserter and endoscope are withdrawn. The materials of the mounting rod 1, the limiting ring 3, and the connecting sleeve 4 are all biodegradable polylactic acid. The degradation of the mounting rod 1, the telescopic sleeve 2, the limiting ring 3, and the connecting sleeve 4 helps the fistula to heal. The integrated design of the mounting rod 1, the limiting ring 3, and the connecting sleeve 4 is suitable for mass production and rapid production.

[0023] In a preferred embodiment, please refer to Figures 1 to 3The outer surface of the telescopic sleeve 2 is coated with a coating 5, which is composed of rapamycin. The coating 5 helps to act on the fistula lesion site during sealing and degradation, promotes granulation tissue proliferation, and improves the speed of fistula healing.

[0024] The working principle of this utility model is as follows: When using the device, the mounting rod 1, limiting ring 3, and connecting sleeve 4 are passed through the telescopic sleeve 2 so that the telescopic sleeve 2 is fitted between the two limiting rings 3 on the outside of the mounting rod 1. The sides of the limiting rings 3 that are close to each other are respectively close to the left and right sides of the telescopic sleeve 2. The coating 5 is applied to the outer surface of the telescopic sleeve 2. The connecting sleeve 4 is connected to the external thread of the external inserter through the internal thread, thus connecting to the front end of the inserter. It is radially compressed and retracted into the inserter. The device is inserted into the designated position of the fistula using endoscopic forceps. Under direct endoscopic visualization, the outer tube of the inserter is withdrawn, causing the telescopic sleeve 2 to open and seal the fistula. The inner rod of the inserter is rotated to separate the inserter from the connecting sleeve 4. Then the inserter and endoscope are withdrawn. The degradation of the mounting rod 1, telescopic sleeve 2, limiting ring 3, and connecting sleeve 4 helps the fistula to heal.

[0025] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A degradable bronchoesophageal fistula occluder, characterized in that: include: Mounting rod (1), with connecting sleeves (4) provided at both ends of the mounting rod (1), the connecting sleeves (4) being used to connect the mounting rod (1) to an external inserter; Telescopic sleeve (2), the telescopic sleeve (2) is sleeved on the outside of the mounting rod (1), and the telescopic sleeve (2) expands outward after contraction to seal the fistula; Limiting ring (3), the limiting ring (3) is symmetrically arranged on the outside of the mounting rod (1), and the limiting ring (3) is used to limit the position of the telescopic sleeve (2) relative to the mounting rod (1); The coating (5) is applied to the outer surface of the telescopic sleeve (2) and is used to improve the speed of fistula healing.

2. The degradable bronchoesophageal fistula occluder according to claim 1, wherein: The mounting rod (1) is fixedly connected to the limiting ring (3) on the outside, and the limiting ring (3) is close to the left and right sides of the telescopic sleeve (2) on the side that is close to each other.

3. The degradable bronchoesophageal fistula occluder of claim 1, wherein: The side of the connecting sleeve (4) is fixedly connected to the left and right sides of the mounting rod (1), and at least one side of the connecting sleeve (4) is provided with an internal thread.

4. The degradable bronchoesophageal fistula occluder of claim 1, wherein: The mounting rod (1), the limiting ring (3), and the connecting sleeve (4) are all made of polylactic acid.

5. The degradable bronchoesophageal fistula occluder of claim 1, wherein: The material of the telescopic sleeve (2) is a polylactic acid polyamide blend.

6. The degradable bronchoesophageal fistula occluder of claim 1, wherein: The coating (5) is composed of rapamycin.

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