A device for promoting healing of anastomotic leaks after digestive tract resection

Abstract

The utility model relates to medical instrument technical field discloses a kind of device for promoting digestive tract resection post-anastomotic stoma healing, comprising: air bag, for being placed in the reconstruction site of digestive tract;Sponge, set in the middle position of air bag, by inflating air bag, can make sponge adhere to the reconstruction site of digestive tract;Pipeline system, including negative pressure suction tube connected with sponge and inflating tube communicated with balloon inner cavity;Negative pressure device, connected with negative pressure suction tube, for extracting liquid from fistula by sponge.The utility model utilizes the micropore liquid absorption characteristics of sponge and the deformation control ability of air bag, forms dynamic negative pressure closed environment, can significantly improve the drainage efficiency of complex fistula, reduce secondary infection risk, provides new type intervention means for refractory fistula such as gastrointestinal fistula, tracheal fistula, with significant clinical application value and technical innovativeness.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a device for promoting the healing of anastomotic fistula after gastrointestinal resection. Background Technology

[0002] In the field of fistula management, existing drainage devices mostly rely on passive gravity drainage or single-material absorption, which has significant clinical limitations. While traditional silicone tubes or foam dressings can achieve basic drainage, they suffer from the following technical bottlenecks: Fitting defects: The complex anatomical structure of the tissues around the fistula makes it difficult for existing devices to form an effective seal with irregular wound surfaces, leading to increased risk of fluid leakage and infection; Insufficient drainage efficiency: Passive drainage relies on body position and gravity, and has limited effect on clearing deep or viscous secretions, often requiring frequent dressing changes; Tissue damage risk: Rigid support structures lack elasticity and adaptability, and long-term implantation can easily lead to local pressure necrosis. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art and to propose a device for promoting the healing of anastomotic fistula after gastrointestinal resection.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A device for promoting the healing of anastomotic leakage after gastrointestinal resection includes: An airbag is used to reconstruct the digestive tract. The sponge is placed in the middle of the air sac. By inflating the air sac, the sponge can be placed in the sealed environment formed by the reconstruction site of the digestive tract and the air sac. The piping system includes a negative pressure suction tube connected to the sponge and an air inflator tube communicating with the inner cavity of the airbag; A negative pressure device, connected to a negative pressure suction tube, is used to extract fluid from the fistula through a sponge.

[0005] Preferably, the airbag is integrally molded from TPU or latex material.

[0006] Preferably, the airbag has a closed, circumferentially extending bladder structure, and a vertically extending guide channel is provided at the central axis of the airbag. The channel extends in a straight line along the axial direction of the airbag, and its inner wall maintains a distance from the outer periphery of the airbag to form a central guide path. The inner diameter of the central guide path is between 4mm and 5mm.

[0007] Preferably, the airbag has enlarged radial dimensions at both ends, which, after inflation, form a seal with the reconstructed part of the digestive tract and are connected through an intermediate section.

[0008] Preferably, the sponge is fitted onto the outer side of the middle section.

[0009] Preferably, the outer diameter of one end of the airbag is between 20mm and 25mm, and the outer diameter of the other end is between 35mm and 40mm. When the airbag is not inflated, its maximum outer diameter is less than 15mm.

[0010] Preferably, the middle section has a columnar structure design, and the outer diameter of the middle section is between 9-12mm.

[0011] Preferably, the air pump pipe is equipped with a valve.

[0012] Preferably, the central guide passage is provided with a force-applying component.

[0013] Preferably, the airbag is provided with a metal wire layer to facilitate positioning under X-ray.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes the microporous liquid absorption properties of a sponge and the deformation control capability of an airbag to create a dynamic negative pressure closed environment. During use, the airbag is placed in the reconstructed area of ​​the digestive tract. By inflating the airbag, a seal is formed between the airbag and the reconstructed area. The sponge then absorbs the fluid generated at the fistula opening, and the fluid can be extracted using a negative pressure suction tube. This invention significantly improves the drainage efficiency of complex fistulas, reduces the risk of secondary infection, and provides a novel intervention method for refractory fistulas such as gastrointestinal fistulas and tracheal fistulas, demonstrating significant clinical application value and technological innovation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the components of a device for promoting the healing of anastomotic fistulas after gastrointestinal resection according to the present invention; Figure 2 This is a top view of the balloon structure of a device for promoting the healing of anastomotic fistulas after gastrointestinal resection, as proposed in this utility model.

[0016] In the diagram: 1. Airbag; 2. Negative pressure suction tube; 3. Air inflator tube; 4. Negative pressure device; 5. Sponge; 6. Central guide path; 7. Insertion channel; 8. Metal layer; 9. Force application device. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1 and Figure 2A device for promoting the healing of anastomotic leakage after gastrointestinal resection, comprising: Airbag 1 is used to be placed in the reconstruction site of the digestive tract. In this embodiment, the digestive tract is the esophagus. In other embodiments, it may also include the stomach or other parts. The tubing system includes a negative pressure suction tube 2 connected to the sponge 5 and an air inflator tube 3 connected to the inner cavity of the airbag 1, which is used to inflate the airbag 1 so that the airbag 1 expands and forms a closed environment with the digestive tract. Sponge 5, 5cm in length, is positioned in the middle of airbag 1. Inflating airbag 1 creates a sealed environment between the sponge 5 and the reconstructed area of ​​the digestive tract. Negative pressure device 4 is connected to negative pressure suction tube 2, which penetrates airbag 1 (the point where the tube penetrates airbag 1 has an insertion channel 7, not communicating with the inner cavity of airbag 1; alternatively, an air inflator tube 3 can also be inserted into the insertion channel 7 and communicate with airbag 1 through the inner wall of the channel 7). The process of inflating the airbag 1 and the outer wall of the sponge 5 are used to extract liquid from the fistula through the sponge 5. The sponge 5 can be a medical-grade silicone gel sponge 5 (porosity > 90%, liquid absorption ≥ 20ml / g) as the liquid storage medium. The negative pressure suction tube 2 is connected to the vacuum bottle (volume 50-200ml) (i.e., negative pressure device 4) through a one-way check valve. The vacuum bottle is pre-filled with nitrogen to maintain a constant negative pressure of -80mmHg to realize liquid suction. It is equipped with a liquid level float sensor to realize automatic valve closing. Compared to existing technologies, this application significantly improves the drainage efficiency of complex fistulas, reduces the risk of secondary infection, and provides a novel intervention method for refractory fistulas such as gastrointestinal fistulas and tracheal fistulas, demonstrating significant clinical application value and technological innovation. In this embodiment, the airbag 1 is integrally molded from TPU or latex material.

[0019] In this embodiment, the airbag 1 has a closed circumferentially extended bladder structure. A guiding channel is provided vertically through the central axis of the airbag 1. The channel extends in a straight line along the axial direction of the airbag 1, and its inner wall surface maintains a distance from the outer periphery of the airbag 1, forming a central guiding path 6.

[0020] In this embodiment, the outer diameter of one end of the airbag 1 is between 20mm and 25mm, and the outer diameter of the other end is between 35mm and 40mm.

[0021] In this embodiment, when the airbag 1 is not inflated, its maximum outer diameter is less than 15mm, making it easy to insert into the digestive tract.

[0022] In this embodiment, the central guide passage 6 is provided with a force-applying component 9, which consists of three wires. The wires can be made of flexible plastic or rubber material, so that when the airbag 1 is placed into the digestive tract, the force-applying component can be applied by other objects to realize the pushing process of the airbag 1.

[0023] Preferably, the airbag 1 is provided with a metal wire layer 8 to facilitate positioning under X-ray. The metal wire is a flexible metal that can be positioned by X-ray and can be built into the airbag 1 or on the surface of the airbag. For example, a platinum-iridium alloy nanowire braided layer or tantalum and carbon fiber core-shell composite wire can be used.

[0024] In this embodiment, the airbag 1 has enlarged radial dimensions at both ends, with different dimensions at each end. The outer diameter of one end is between 20mm and 25mm, and the outer diameter of the other end is between 35mm and 40mm. In a preferred embodiment of this application, one end is 25mm and the other end is 35mm. After inflation, it forms a seal with the reconstructed part of the digestive tract and is connected through a middle section. In this embodiment, the middle section has a columnar structure design, which is suitable for the curved shape of the digestive tract. The outer diameter of the middle section is between 9 and 12mm. In a preferred embodiment of this application, the outer diameter of the middle section is 10mm, and the sponge 5 is sleeved on the outside of the middle section.

[0025] In this embodiment, the inner diameter of the central guide passage 6 is between 4mm and 5mm. As a preferred embodiment of this application, the inner diameter of the central guide passage 6 is 5mm.

[0026] In this embodiment, a valve is provided on the air inflator pipe 3 to control the inflation and deflation.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for promoting the healing of anastomotic leakage after gastrointestinal resection, characterized in that: include: An airbag is used to be inserted into the reconstruction site of the digestive tract. By inflating the airbag, a sealed environment can be formed at the reconstruction site of the digestive tract. The sponge is placed in the middle of the air sac. By inflating the air sac, the sponge can be placed in a closed environment formed in the reconstructed part of the digestive tract. The piping system includes a negative pressure suction tube connected to the sponge and an air inflator tube communicating with the inner cavity of the airbag; A negative pressure device, connected to a negative pressure suction tube, is used to extract fluid from the fistula through a sponge.

2. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 1, characterized in that: The airbag is made of TPU or latex material in one piece.

3. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 1, characterized in that: The airbag has a closed, circumferentially extended bladder structure. A vertically extending channel is provided at the central axis of the airbag. The channel extends in a straight line along the axial direction of the airbag, and its inner wall maintains a distance from the outer periphery of the airbag to form a central guiding path. The inner diameter of the central guiding path is between 4mm and 5mm.

4. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 3, characterized in that: The airbag has enlarged radial dimensions at both ends, and when inflated, it forms a seal with the reconstructed part of the digestive tract and is connected through the middle section.

5. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 4, characterized in that: The sponge is fitted onto the outside of the middle section.

6. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 5, characterized in that: The outer diameter of one end of the airbag is between 20mm and 25mm, and the outer diameter of the other end is between 35mm and 40mm. When the airbag is not inflated, its maximum outer diameter is less than 15mm.

7. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 5, characterized in that: The middle section has a columnar structure design, and its outer diameter is between 9-12mm.

8. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 7, characterized in that: A valve is installed on the air pump pipe.

9. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 3, characterized in that: The central guide passage is equipped with a force-applying component.

10. The device for promoting the healing of anastomotic leakage after gastrointestinal resection according to claim 1, characterized in that: The airbag is equipped with a metal wire layer for easy positioning under X-ray.

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