A double-layer gastric tube with replaceable inner tube at home

Abstract

The application discloses a double-layer stomach tube with replaceable inner tube at home, and relates to the technical field of medical equipment. The double-layer stomach tube comprises an outer tube, wherein the head end of the outer tube is integrally fixed with an outer corrugated section, and an installation opening is formed in the outer side of the head of the outer corrugated section. The application solves the problem that patients have difficulty in replacing the stomach tube at home by arranging the outer tube and the inner tube body structure, and the inner tube body is provided with a one-way duckbill valve to form an automatic anti-reflux mechanism. The stomach tube can be managed in cycles, the outer tube is replaced monthly, the inner tube body is replaced weekly, or the inner tube body is replaced immediately once it is blocked, and the patient does not need to return to the hospital. The head end of the inner tube body extends out of the outer tube, and the corrugated and threaded connection design is closely matched to enhance the sealing performance and ensure the cleanliness of the tube. The same outer tube can replace inner tube bodies made of different materials according to the patient's condition, and the inner tube body can be used for multiple purposes, namely, conveying nutrition, preventing reflux, selecting materials, replacing at home at any time, and serving as a guide wire.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a double-layered gastric tube with a replaceable inner tube at home. Background Technology

[0002] A nasogastric tube is a commonly used clinical medical device used to deliver nutritional fluids (nasogastric feeding) or to perform gastrointestinal decompression for patients who are unable to eat orally. For patients receiving long-term home care, the nasogastric tube usually needs to be left in place for 28-35 days, while the biofilm formation time on the inner wall of the nasogastric tube is only 1 to 2 weeks, increasing the risk of infection.

[0003] Traditional gastric tubes are single-layered, requiring complete removal and reinsertion once blocked or reaching their replacement cycle. This procedure necessitates professional medical personnel and frequent hospital visits, causing significant inconvenience for patients with limited mobility. Furthermore, existing gastric tubes are often made from a single material, failing to adequately consider the varying material properties required for different components. Traditional gastric tube home care presents numerous risks, such as increased risk of infection due to delayed replacement, increased risk of reflux and aspiration, and difficulty in cleaning the inner wall of the tube. Therefore, this invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a double-layered gastric tube with a replaceable inner tube at home, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a double-layer gastric tube with a replaceable inner tube at home, comprising an outer tube, an outer corrugated section integrally fixed at the head end of the outer tube, an installation port on the outer side of the head of the outer corrugated section, a scale line on one side of the tail end of the outer tube, a flushing hole on one side of the head end of the outer tube, a threaded groove on the inner wall of the tail end of the outer tube, an inner tube body inserted and fitted inside the outer tube, an inner corrugated section integrally fixed at the head end of the inner tube body, a closed rounded end fixed at the outer end of the inner corrugated section, an external thread on the outer wall of the tail end of the inner tube body, the external thread matching the threaded groove, and a locking cap structure at the tail end of the outer tube.

[0006] Preferably, the closed rounded end is provided with symmetrical connecting holes on its circumference, which serve as feeding holes. The inner tube is provided with a one-way duckbill valve on its inner wall, and the distance between the one-way duckbill valve and the head end of the inner tube is 40-50 cm.

[0007] Preferably, two flushing holes are vertically provided, which serve to circulate and flush the water inside the outer pipe.

[0008] Preferably, the inner corrugated section and the outer corrugated section are adapted to fit together, and the outer wall of the inner corrugated section is provided with a hydrophilic coating, which serves to lubricate and adapt to the outer corrugated section.

[0009] Preferably, the closed rounded end adapts to and extends out of the mounting opening, with an extension length of 0.6-1 cm.

[0010] Preferably, the locking structure includes a fixed sleeve fixedly fitted on the outer wall of the outer tube tail, a first cover block adapted to be tightly fitted on the fixed sleeve, and a second cover block adapted to be tightly fitted on the first cover block.

[0011] Preferably, a first connecting band is connected to the first cover block and the fixed sleeve on the same side, and a second connecting band is connected to the second cover block and the first cover block on the other side, and a lever is fixed to one side of the second cover block.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This double-layered gastric tube, with a replaceable inner tube, solves the problem of difficult home tube replacement for patients through its outer and inner tube structure. It allows family members to safely and conveniently replace the tube at home. The inner tube features a one-way duckbill valve, creating an automatic anti-reflux mechanism. The tube can be managed cyclically, with the outer tube changed monthly and the inner tube weekly, or the inner tube replaced immediately upon blockage, eliminating the need for hospitalization. The inner tube protrudes from the outer tube, with a corrugated and threaded connection design for a tight fit, enhancing sealing and ensuring cleanliness. The same outer tube can be replaced with different materials for the inner tube as needed, and the inner tube is multi-functional, serving as a nutrient delivery device, anti-reflux device, optional material, easy home replacement, and guidewire. When replacing the inner tube, water is injected and flows out through the flushing hole in the outer tube, rinsing the inner wall of the outer tube. Attached Figure Description

[0013] Figure 1 This is a first three-dimensional structural diagram of the tail and head of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the tail and head of the present invention; Figure 3 This is a front view of the tail and head of the present invention; Figure 4 This is a cross-sectional view of the tail and head of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of part A in the middle; Figure 6 For the present invention Figure 4 A magnified structural diagram of part B.

[0014] In the diagram: 1. Outer tube; 101. Outer corrugated section; 102. Flushing hole; 103. Scale line; 104. Threaded groove; 105. Mounting port; 2. Inner tube body; 201. External thread; 202. One-way duckbill valve; 203. Inner corrugated section; 204. Closed rounded end; 205. Connecting hole; 3. Fixing sleeve; 301. First cover block; 302. Second cover block; 303. First connecting strip; 304. Second connecting strip; 305. Pulling block. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] During nasogastric feeding, a gastric tube is required. The gastric tube provided by this invention is specifically designed for patients who require long-term nasogastric feeding support. Non-medical personnel can change the inner tube and perform periodic care themselves. Before using the gastric tube, preparations such as installation and inspection are required to ensure its normal use.

[0017] like Figures 1-6 As shown, the present invention provides a technical solution: a double-layer gastric tube with a replaceable inner tube at home, comprising an outer tube 1, an outer corrugated section 101 integrally fixed at the head end of the outer tube 1, an installation port 105 on the outer side of the head of the outer corrugated section 101, a scale line 103 on one side of the tail end of the outer tube 1, an irrigation hole 102 on one side of the head end of the outer tube 1, a threaded groove 104 on the inner wall of the tail end of the outer tube 1, an inner tube body 2 inserted and fitted inside the outer tube 1, an inner corrugated section 203 integrally fixed at the head end of the inner tube body 2, a closed rounded end 204 fixed at the outer end of the inner corrugated section 203, an external thread 201 on the outer wall of the tail end of the inner tube body 2, the external thread 201 being adapted to the threaded groove 104, and a locking cap structure at the tail end of the outer tube 1.

[0018] In this embodiment, a connecting hole 205 is symmetrically provided on the closed rounded end 204. The connecting hole 205 serves as a feeding hole. A one-way duckbill valve 202 is provided on the inner wall of the inner tube 2. The distance between the one-way duckbill valve 202 and the head end of the inner tube 2 is 40-50 cm. It should be noted that the one-way duckbill valve 202 effectively reduces the risk of reflux or aspiration of gastric contents. The one-way duckbill valve 202 is existing technology.

[0019] In this embodiment, two vertically oriented flushing holes 102 are provided. These holes facilitate the flow of water to flush the inner wall of the outer tube 1. The flushing holes 102 are located 5-8 cm from the tip of the outer tube 1. In normal use, the inner tube 2 is fully inserted, and its outer wall covers the flushing holes 102, forming a seal. During flushing, after the inner tube 2 is removed, the flushing holes 102 are exposed, allowing water to be injected from the tail end of the outer tube 1 to flush the inner wall. The water does not need to be aspirated and can be directly introduced into the stomach. This serves to clean the inner wall of the outer tube 1 simultaneously when replacing the inner tube 2. When the tube is inserted, the flushing holes 102 are located outside the body or just inside the nasal cavity, preventing any obstruction.

[0020] In this embodiment, the inner corrugated section 203 is fitted to the outer corrugated section 101. The outer wall of the inner corrugated section 203 is coated with a hydrophilic coating to lubricate it. The closed, rounded end 204 fits and extends out of the installation port 105, with an extension length of 0.6-1 cm. The outer tube 1 is fixed and replaced every 28-35 days by medical personnel. The inner tube 2 is replaced every 5-7 days, depending on the bacterial biofilm formation cycle; replacement can be done by a family member. This phased care is more scientific, reducing the patient's pain from hospital visits and frequent tube insertions.

[0021] In this embodiment, the locking structure includes a fixed sleeve 3 fixedly fitted to the outer wall of the outer tube 1. A first cover block 301 is fitted and tightened on the fixed sleeve 3, and a second cover block 302 is fitted and tightened on the first cover block 301. This gastric tube is simple to operate and can be used at home. Replacing the inner tube 2 can be completed in four steps, and family members can master it after one training session. It thoroughly clears blockages without the need for repeated flushing. If it cannot be flushed, it can be easily replaced. The new inner tube 2 is completely clean, unlike traditional gastric tubes where blockages require returning to the hospital for re-insertion, reducing patient suffering. It features automatic anti-reflux for greater safety at home. The one-way duckbill valve 202 is located inside the stomach, with a reverse sealing pressure ≥50cmH2O, automatically preventing the reflux of gastric contents and significantly reducing the risk of aspiration, making it especially suitable for bedridden patients. It allows for periodic management and scientific matching. The outer tube is changed monthly, and the inner tube is changed weekly, achieving a balance between comfort and hygiene. Materials are optional and can be precisely matched. The same outer tube 1, paired with inner tube bodies 2 made of different materials, meets diverse clinical needs and achieves precise nursing care; it reduces the number of patient returns, alleviating the burden on patients and their families and saving medical resources; insertion is smooth and requires no guidewire. Traditional silicone gastric tubes are too soft and require an additional guidewire for insertion, which is discarded after use, wasting resources. This gastric tube's inner tube body 2 can be made of a harder material (such as PVC), which has sufficient rigidity and eliminates the need for an additional guidewire. The inner tube body 2 serves three purposes (nutrition delivery, anti-reflux, and guidewire), and the first insertion success rate is significantly improved because the composite body is less prone to coiling or kinking, thus increasing the success rate; the nutrient solution enters the stomach directly, avoiding contamination. The two connection holes 205 are completely external, opening directly into the stomach, allowing the nutrient solution to enter the stomach completely without contacting the outer tube 1, thus avoiding contamination.

[0022] In this embodiment, a first connecting strap 303 connects the first cover 301 and the fixed sleeve 3 on the same side, and a second connecting strap 304 connects the second cover 302 and the first cover 301 on the other side. A lever 305 is fixed to one side of the second cover 302. The structure of the outer tube 1 and the inner tube 2 solves the problem of difficulty in changing the gastric tube at home, allowing family members to safely and conveniently change it themselves at home. Furthermore, the inner tube 2 is equipped with a one-way duckbill valve 202, forming an automatic anti-reflux mechanism. The gastric tube can be changed periodically. Management: The outer tube is replaced every 1 month, and the inner tube is replaced every 2 weeks, or a new inner tube 2 is replaced immediately if it becomes blocked, without the need to return to the hospital; the end of the inner tube 2 extends out of the outer tube and fits tightly with the corrugated and threaded connection design, enhancing the sealing performance and ensuring the cleanliness of the tube; the same outer tube 1 can be replaced with inner tube 2 of different materials as needed for the condition, and the inner tube 2 can be used for multiple purposes, namely, delivering nutrition, anti-backflow device, optional materials, home replacement at any time, and also as a guide wire; when replacing the inner tube 2, water is injected, and the water flows out through the flushing hole 102 of the outer tube 1 to flush the inner wall of the outer tube 1.

[0023] When using this gastric tube, if the inner tube 2 needs to be replaced, open the first cover 301, rotate the inner tube 2 to unlock it, pull out the old inner tube 2, then inject water from the end of the outer tube 1, insert the new inner tube 2 into the outer tube 1, rotate the inner tube 2 to lock it, and ensure that the inner tube 2 is locked in the correct position. At this time, the inner tube 2 and the outer tube 1 fit tightly. This entire process can be easily performed at home, solving the problem of difficult tube replacement. When performing gastrointestinal decompression, connect the negative pressure drainage device, and the gastric contents are drained through the inner tube 2. During decompression: the opening pressure of 3-5cmH2O is less than the conventional negative pressure (20-50mgH2O), and the valve can be opened normally, consuming only a small amount of negative pressure energy.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A double-layered gastric tube with a replaceable inner tube at home, comprising an outer tube (1), characterized in that: The outer tube (1) has an integrally fixed outer corrugated section (101) at the head end. An installation port (105) is opened on the outer side of the head of the outer corrugated section (101). A scale line (103) is provided on one side of the tail of the outer tube (1). A flushing hole (102) is opened on one side of the head of the outer tube (1). A threaded groove (104) is opened on the inner wall of the tail of the outer tube (1). An inner tube body (2) is inserted and fitted inside the outer tube (1). An inner corrugated section (203) is integrally fixed at the head end of the inner tube body (2). A closed rounded end (204) is fixed at the outer end of the inner corrugated section (203). An external thread (201) is provided on the outer wall of the tail of the inner tube body (2). The external thread (201) is adapted to the threaded groove (104). A locking cap structure is provided at the tail end of the outer tube (1).

2. The double-layered gastric tube with replaceable inner tube at home according to claim 1, characterized in that: The closed round end (204) is symmetrically provided with connecting holes (205) on its circumference. The connecting holes (205) serve as feeding holes. The inner wall of the inner tube (2) is provided with a one-way duckbill valve (202). The distance between the one-way duckbill valve (202) and the head end of the inner tube (2) is 40-50 cm.

3. A double-layered gastric tube with a replaceable inner tube at home, as described in claim 1, is characterized in that: Two flushing holes (102) are vertically opened, and the flushing holes (102) serve to circulate and flush the water inside the outer pipe (1).

4. A double-layered gastric tube with a replaceable inner tube at home, as described in claim 1, characterized in that: The inner corrugated section (203) is adapted to fit the outer corrugated section (101), and the outer wall of the inner corrugated section (203) is provided with a hydrophilic coating, which serves to adapt to and lubricate the outer corrugated section (101).

5. A double-layered gastric tube with a replaceable inner tube at home according to claim 1, characterized in that: The closed rounded end (204) is adapted to and extends out of the mounting port (105) with an extension length of 0.6-1 cm.

6. A double-layered gastric tube with a replaceable inner tube at home according to claim 1, characterized in that: The locking structure includes a fixed sleeve (3) fixedly sleeved on the outer wall of the tail of the outer tube (1), a first cover block (301) adapted to be tightly closed on the fixed sleeve (3), and a second cover block (302) adapted to be tightly closed on the first cover block (301).

7. A double-layered gastric tube with a replaceable inner tube at home, as described in claim 6, characterized in that: The first cover block (301) and the fixed sleeve (3) are connected on the same side by a first connecting band (303), and the second cover block (302) and the first cover block (301) are connected on the other side by a second connecting band (304). A lever (305) is fixed on one side of the second cover block (302).

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