Stomach tube with backflow prevention function

Abstract

The invention discloses a stomach tube device with a backflow prevention function, which comprises a main body mechanism and an auxiliary mechanism, the main body mechanism comprises a stomach tube body, one end of the stomach tube body is inserted into the stomach of a patient, and the other end of the stomach tube body is connected to the outside; the hollow head is fixedly mounted at the front end of the stomach tube body; the large air bag is fixedly arranged at the front end of the stomach tube body, contracts in the hollow-out head when not inflated, and expands and expands in the stomach after being inflated; the small air bag is annular, fixedly arranged on the peripheral face of the front portion of the stomach tube body in a sleeving mode and located behind the large air bag. One end of the first thin air tube is connected to the small air bag, and the other end of the first thin air tube is connected to the upper end of the large air bag; by means of the innovative double-air-bag linkage design and the automatic physical pressure control mechanism, gastric juice backflow can be effectively prevented, continuous pressure on the cardia sphincter is avoided, meanwhile, dependence on a complex electronic sensor and a control system is not needed, and higher safety, reliability and operation simplicity and convenience are achieved.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, in particular to a gastric tube with an anti-reflux function. Background Art

[0002] In the medical field, gastric tube is a commonly used medical device, which is widely used for nutritional supplementation, drug delivery and gastric decompression of patients. However, there are some significant problems and shortcomings in the design of traditional gastric tube, especially in preventing gastric reflux. Gastric reflux not only causes discomfort to patients, but also may lead to serious complications such as esophagitis and gastroesophageal reflux disease (GERD). Therefore, how to effectively prevent gastric reflux has become a clinical problem that needs to be solved urgently.

[0003] Traditional gastric tubes usually adopt a single pipe structure, which is directly inserted into the patient's stomach and the gastric contents are discharged by gravity or suction. However, this design has limited effect in preventing gastric reflux. Some gastric tubes are equipped with a single airbag structure, which attempts to prevent reflux by inflating the airbag in the stomach, but due to the limitations of the airbag design and control technology, the effect is not ideal. Instead, it may cause continuous pressure on the cardiac sphincter, leading to tissue damage and dysfunction. For example, patent No. CN219001239U discloses a new type of anti-reflux gastric tube, which prevents gastric contents from reflux by inflating the airbag and fixing it at the cardia. The liquid outlet and liquid inlet are separated to prevent cross infection. There is no need to repeatedly separate the pump tube and the gastric tube, which is convenient for pumping back the gastric contents and preventing gastric retention. However, the solution disclosed in the patent uses a single balloon to inflate and fix the cardia to prevent reflux of gastric contents, which will continuously exert pressure on the cardia sphincter, causing sphincter dysfunction, such as relaxation or spasm, affecting its ability to close and open normally. This dysfunction increases the risk of gastric reflux, thereby causing a series of related diseases, and long-term pressure will keep the cardia sphincter in a state of continuous tension, leading to muscle fatigue and damage. The fatigued sphincter will gradually lose its elasticity and contraction ability, further exacerbating the gastric reflux problem and forming a vicious cycle.

[0004] Moreover, the patented structure is relatively complex and requires the user to manually operate multiple components (such as a reserved plug, an air intake head, and an adjusting nut) to control the airbag, which increases the difficulty and complexity of the operation.

[0005] In addition, although some existing improved gastric tubes have solved the reflux problem to a certain extent, they usually rely on electronic sensors and complex control systems to detect reflux and automatically adjust the state of the airbag. This not only increases the complexity and cost of the device, but may also affect the reliability and safety of the device due to malfunction or failure of electronic components. For patients, these complex devices also increase the inconvenience of use and the difficulty of maintenance. Summary of the invention

[0006] The purpose of the present invention is to provide a gastric tube with anti-reflux function, which can effectively prevent gastric juice reflux and avoid continuous pressure on the cardiac sphincter through innovative double-airbag linkage design and automated physical pressure control mechanism. At the same time, it does not need to rely on complex electronic sensors and control systems, and has higher safety, reliability and ease of operation.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A gastric tube device with anti-reflux function comprises a main mechanism and an auxiliary mechanism, wherein the main mechanism comprises:

[0009] The stomach tube body, one end of which is inserted into the patient's stomach and the other end is connected to the outside;

[0010] The hollow head is fixedly mounted on the front end of the gastric tube body;

[0011] The large air bag is fixedly arranged at the front end of the gastric tube body, shrinks in the hollow head when not inflated, and expands in the stomach after being inflated;

[0012] The small air bag is annular and fixedly mounted on the front outer peripheral surface of the gastric tube body and located behind the large air bag;

[0013] A first thin trachea is arranged in the stomach tube body, one end of which is connected to the small air bag and the other end is connected to the upper end of the large air bag for conducting gas;

[0014] A second thin trachea is arranged in the stomach tube body, one end of which is connected to the small air bag and the other end of which extends to the outside of the stomach tube for suction and inflation;

[0015] The elastic valve is arranged in the first thin air tube to control the flow of gas.

[0016] Wherein, the auxiliary mechanism comprises:

[0017] A connector, fixedly mounted on the rear end of the gastric tube body;

[0018] A syringe interface is provided on the inner side of the connector and is used to connect a syringe for gas regulation and nutrient supplementation;

[0019] A protective cover and a sealing block are movably mounted on the connector to protect the syringe interface;

[0020] The wearing rope and rubber ring are used to fix the gastric tube body behind the patient's ear to provide wearing comfort.

[0021] Wherein, the elastic valve is an elastic reduced diameter structure, and when the force exerted by the gas pressure on it exceeds its elastic threshold, the elastic reduced diameter structure is stretched open to allow the gas to pass through.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] The gastric tube device with anti-reflux function of the present invention has significant clinical and usage advantages, and significantly improves the treatment effect and quality of life of patients:

[0024] 1. Automatic linkage blocking to prevent backflow

[0025] Double airbag design: Through the linkage design of the large airbag and the small airbag, when gastric juice refluxes, the large airbag is squeezed by the contents of the stomach, and the gas enters the small airbag through the first thin air tube, causing the small airbag to inflate quickly, automatically blocking the cardia and preventing further reflux of gastric juice. This design does not require any sensors and relies on physical pressure changes to achieve a linkage reaction, ensuring that the device can effectively prevent reflux in a timely manner at critical moments.

[0026] Automatic control: The presence of the elastic valve enables the gas to flow automatically under specific pressure conditions, realizing the linkage operation between the large airbag and the small airbag without external intervention, ensuring the automation and efficiency of the system.

[0027] 2. Do not squeeze the cardia continuously to avoid injury

[0028] Avoid cardiac injury: The small airbag is in an uninflated or low-pressure state when not in a reflux state, and will not continuously exert pressure on the cardiac sphincter, thus avoiding damage to the cardiac sphincter caused by long-term compression. This design not only ensures the effective protection function of the device during reflux, but also ensures the protection of the cardiac sphincter under normal circumstances.

[0029] Flexible materials: The gastric tube body, large airbag, small airbag and other components are made of medical-grade silicone or polyurethane materials. These materials have good biocompatibility and softness, and can be used in the human body for a long time without causing allergic or irritation reactions.

[0030] 3. Versatility

[0031] Nutritional supplementation and drug delivery: Through the connector and syringe interface, nutrient solution and drug delivery can be conveniently carried out to meet the needs of patients at different stages of treatment.

[0032] Gastric decompression function: Gastric decompression operation can be performed through the gastric tube device to reduce gastric pressure in patients after surgery or with chronic diseases, relieve discomfort symptoms and promote recovery.

[0033] 4. Easy to operate

[0034] Auxiliary mechanism design: The design of the connector is convenient for medical staff to operate and adjust, and the existence of the syringe interface makes gas regulation and nutrition supplementation more convenient. The protective cover and sealing block ensure the hygiene and safety of the interface.

[0035] Comfortable to wear: The design of the wearing rope and rubber ring enables the gastric tube to be fixed behind the patient's ear, providing good wearing comfort and reducing the burden of long-term use.

[0036] 5. Wide adaptability

[0037] Suitable for different patients: The design of the gastric tube device can adapt to patients of different body shapes and conditions, and is widely used in gastroesophageal reflux disease, postoperative recovery, chronic gastrointestinal diseases and other conditions.

[0038] Flexible adjustment: Through the second thin air tube, medical staff can easily inflate and deflate the large and small air bags to ensure the best effect of the device at different treatment stages.

[0039] 6. Significant clinical effects

[0040] The application of actual clinical cases proves that the gastric tube device of the present invention has significant advantages in preventing gastric reflux, improving patient comfort, facilitating operation and wide adaptability. Specific cases include:

[0041] Prevent esophageal damage caused by gastric reflux: significantly reduce esophagitis symptoms and improve patients' nutritional status.

[0042] Prevention of postoperative vomiting and related complications: effectively prevent postoperative vomiting, reduce complications and speed up recovery.

[0043] Relieve symptoms of chronic gastrointestinal diseases: reduce acid reflux and significantly improve patients' quality of life.

[0044] In summary, the gastric tube device with anti-reflux function of the present invention significantly improves the performance of the gastric tube device in preventing gastric reflux, nutritional supplementation, drug delivery and gastric decompression through innovative double-balloon design, automatic control mechanism, excellent material selection and multifunctionality, and has important clinical application value. At the same time, the device can automatically block and prevent reflux when reflux occurs, without any sensor, and will not continuously squeeze the cardia at normal times, avoiding damage to the cardia sphincter. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the structure of the invention;

[0046] Figure 2 A schematic diagram showing the first and second inner thin air tubes of the present invention;

[0047] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of local details;

[0048] Figure 4 It is a schematic structural diagram of the connector of the present invention;

[0049] Figure 5 It is a structural schematic diagram of a wearing rope of the present invention.

[0050] Markings in the figure: 1. Main body; 101. Gastric tube body; 102. Hollow head; 103. Large air bag; 104. Small air bag; 106. First thin air tube; 107. Elastic valve; 108. Second thin air tube; 2. Auxiliary mechanism; 201. Connecting head; 203. Wearing rope; 204. Rubber ring; 206. Syringe interface; 207. Protective cover; 208. Sealing block. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] See also Figures 1 to 5 The present invention relates to a gastric tube device with anti-reflux function, comprising a main mechanism 1 and an auxiliary mechanism 2, wherein the main mechanism 1 comprises:

[0053] A gastric tube body 101, one end of which is inserted into the patient's stomach and the other end is connected to the outside;

[0054] The hollow head 102 is fixedly mounted on the front end of the gastric tube body 101;

[0055] The large air bag 103 is fixedly arranged at the front end of the stomach tube body 101, and is shrunk in the hollow head 102 when not inflated, and expands and unfolds in the stomach after being inflated;

[0056] The small air bag 104 is annular and fixedly mounted on the front outer peripheral surface of the gastric tube body 101 and located behind the large air bag 103;

[0057] A first thin air tube 106 is disposed in the gastric tube body 101, one end of which is connected to the small air bag 104, and the other end of which is connected to the upper end of the large air bag 103, for conducting gas;

[0058] A second thin air tube 108 is disposed in the gastric tube body 101, one end of which is connected to the small air bag 104, and the other end of which extends to the outside of the gastric tube for suction and inflation;

[0059] The elastic valve 107 is disposed in the first thin air tube 106 to control the flow of gas.

[0060] Furthermore, the auxiliary mechanism 2 includes:

[0061] The connector 201 is fixedly mounted on the rear end of the gastric tube body 101;

[0062] The syringe interface 206 is provided on the inner side of the connector 201 and is used to connect a syringe for gas regulation and nutrient supplementation;

[0063] The protective cover 207 and the sealing block 208 are movably mounted on the connector 201 to protect the syringe interface 206;

[0064] The wearing rope 203 and the rubber ring 204 are used to fix the gastric tube body 101 behind the patient's ear to provide wearing comfort.

[0065] Furthermore, the elastic valve 107 is an elastic reduced diameter structure, and when the force exerted by the gas pressure on it exceeds its elastic threshold, the elastic reduced diameter structure is stretched open to allow gas to pass through.

[0066] Furthermore, the anti-reflux method of the gastric tube device is:

[0067] ① Inserting the gastric tube: The medical staff inserts the gastric tube body 101 into the patient's stomach, at which time the large air bag 103 is shrunk in the hollow head 102, and both the large air bag 103 and the small air bag 104 pass through the cardia;

[0068] ② Locating the cardia: inflate the small airbag 104 through the second thin trachea 108, and the small airbag 104 bulges and gently pulls back the gastric tube. When the small airbag 104 is blocked by the cardia and cannot be pulled back, it is determined that the small airbag 104 is located at the cardia;

[0069] ③ Inflate the large air bag: continue to increase the air pressure through the second thin air tube 108, so that the force of the gas in the small air bag 104 on the elastic valve 107 exceeds the threshold of the elastic valve 107, and the gas pushes open the elastic valve 107 to enter the large air bag 103 and inflate the large air bag 103;

[0070] ④ Deflate the small airbag: the air in the small airbag 104 is released through the second thin air tube 108, the small airbag 104 shrinks, and the large airbag 103 remains inflated due to the closure of the elastic valve 107;

[0071] ⑤ When gastric reflux occurs, the contents in the stomach move during the reflux process, causing a certain amount of physical squeezing on the large airbag 103. The squeezing of the large airbag 103 causes the force of the gas in the large airbag 103 on the elastic valve 107 to exceed its threshold value, and the gas pushes open the elastic valve 107 to enter the small airbag 104 and inflate the small airbag 104, automatically closing the cardia to prevent gastric reflux; after the reflux ends, the patient himself or the staff opens the second thin air tube 108 from the outside to release the air in the small airbag 104, so that the small airbag 104 returns to its original state, reducing the continuous squeezing of the cardia;

[0072] ⑥ Pulling out the gastric tube: When the gastric tube needs to be pulled out, negative pressure suction is performed through the second thin air tube 108 to release the gas in the large air bag 103 and the small air bag 104 to shrink them, making it easier to take out the gastric tube.

[0073] The gastric tube body 101 is the basic structure of the entire gastric tube device, connecting the patient's stomach with external equipment, and providing multiple functions, including nutritional supplementation, drug delivery, gastric decompression, and prevention of gastric reflux. The gastric tube body is made of biocompatible materials such as medical grade silicone or polyurethane, which have the advantages of being soft, durable, non-toxic, and non-irritating, ensuring that long-term use is safe and harmless to patients.

[0074] Front part: The front part is designed to be slender and soft, which is convenient for insertion and passage through the esophagus, reducing irritation and damage to the esophagus and stomach. The front part is also equipped with a hollow head to facilitate the placement and contraction of the airbag.

[0075] Middle section: The middle section is the main body of the gastric tube, which has a certain rigidity to prevent the tube from folding and blocking, while maintaining softness to adapt to the environment in the stomach. The built-in first and second thin trachea extend through the middle section to achieve gas conduction and control.

[0076] Rear part: The rear part is connected to the auxiliary mechanism, which is convenient for medical staff to operate and adjust. The rear part is equipped with a syringe interface for connecting the syringe for gas regulation and nutritional supplementation. The protective cover and sealing block design ensure the hygiene and safety of the interface.

[0077] Features:

[0078] Versatility: The gastric tube body is not only used for traditional nutritional supplementation and drug delivery, but also has anti-reflux and gastric decompression functions, comprehensively solving the various needs of patients.

[0079] Safety and comfort: Material selection and structural design ensure the safety of the gastric tube and the comfort of the patient. Soft materials and reasonable design reduce pain and discomfort during insertion.

[0080] Strong adaptability: The gastric tube itself is suitable for patients of various body shapes and conditions, and is widely used in gastroesophageal reflux disease, postoperative recovery, chronic gastrointestinal diseases, etc.

[0081] The hollow head (102) is an important component fixedly mounted on the front end of the gastric tube body. Its design should not only ensure smooth insertion of the device, but also support the function of the airbag. The hollow head is made of high-strength, corrosion-resistant medical materials, such as medical-grade plastic or stainless steel, to ensure that it will not be damaged during long-term use in gastric acid and other digestive fluids.

[0082] Hollow structure: The unique hollow design of the hollow head enables it to accommodate an uninflated large balloon, while providing enough space for the balloon to expand when inflated. This design can ensure both the smooth insertion of the gastric tube and the normal function of the balloon.

[0083] Fixing device: The hollow head is firmly connected to the gastric tube body through the fixing device to prevent it from falling off during insertion and use. The fixing device adopts a buckle or thread structure to ensure a firm connection.

[0084] Smooth Surface: The surface of the hollow head is finely polished to ensure smoothness and no burrs, reducing friction and irritation to the esophagus and stomach wall during insertion.

[0085] Features:

[0086] Protective function: The hollow head shrinks the uninflated large air balloon during insertion, protecting the air balloon from being squeezed or damaged by the esophagus and stomach wall.

[0087] Air balloon support: After inflation, the hollow head provides support for the expanded large air balloon, ensuring its stability and effectiveness in the stomach to prevent reflux.

[0088] Convenient operation: The hollow head design is simple, which is convenient for medical staff to operate and adjust, and improves the efficiency and safety of intubation.

[0089] In this embodiment, more specifically:

[0090] Gastric tube body 101:

[0091] Size range: diameter 3-5mm, length 600-800mm;

[0092] Shape and structure: Tube-shaped, made of flexible material, with one end closed (inserted into the stomach) and the other end open (connected to the outside);

[0093] Material: medical grade silicone or polyurethane;

[0094] Function: Used to drain gastric juice or gas from the stomach.

[0095] Hollow head 102:

[0096] Size range: diameter 5-7mm, length 10-15mm;

[0097] Shape and structure: cylindrical, with multiple small holes at the front for gastric juice and gas to pass through;

[0098] Material: stainless steel or medical grade plastic;

[0099] Function: Prevents stomach contents from blocking the tube and allows gastric juice and gas to pass through.

[0100] Connector 201:

[0101] Size range: diameter 5-7mm, length 20-30mm;

[0102] Shape and structure: cylindrical, with a syringe interface 206 on the inside;

[0103] Material: stainless steel or medical grade plastic;

[0104] Function: Connect the gastric tube body 101 with the external syringe interface.

[0105] Syringe interface 206:

[0106] Size range: diameter 2-3mm, length 10-15mm;

[0107] Shape structure: small hole interface;

[0108] Material: stainless steel or medical grade plastic;

[0109] Function: Used to connect syringes for gas regulation and nutritional supplementation.

[0110] Protective cover 207 and sealing block 208:

[0111] Size range: protective cover diameter 5-7mm, sealing block diameter 2-3mm;

[0112] Shape and structure: cap-shaped and block-shaped;

[0113] Material: medical grade plastic or rubber;

[0114] Function: To protect the syringe interface 206 and prevent contamination.

[0115] Wearing rope 203 and rubber ring 204:

[0116] Size range: wearing rope length 150-200mm, rubber ring diameter 10-20mm;

[0117] Shape structure: rope and ring;

[0118] Material: The wearing rope is made of cotton or nylon, and the rubber ring is made of medical grade rubber;

[0119] Function: Fix the gastric tube body 101 behind the patient's ear to provide wearing comfort.

[0120] In this embodiment, the large air bag 103, the small air bag 104, the elastic valve 107, the first air tube 106 and the second air tube 108 play a vital role in preventing backflow, which is described in detail below:

[0121] Large Air Bag 103:

[0122] The large air balloon is located at the front end of the gastric tube body 101 and is shrunk in the hollow head 102 when not inflated. Its size is between 10-15 mm in diameter (after inflation) and 20-30 mm in length. These sizes ensure that the large air balloon can expand effectively after inflation without causing excessive pressure or discomfort to the intragastric structure.

[0123] The large balloon is made of medical-grade silicone or polyurethane. These materials have excellent biocompatibility and can be used safely in the human body without causing allergic or irritating reactions. In addition, medical-grade silicone and polyurethane have excellent elasticity and flexibility, and can expand quickly after inflation and quickly return to their original shape after deflation. These materials also withstand the acidic environment in the stomach, ensuring reliability and durability for long-term use.

[0124] When not inflated, the large air balloon is shrunk in the hollow head 102. This design facilitates the insertion and positioning of the gastric tube and reduces irritation and discomfort to the patient.

[0125] The main functions of the large air bag are twofold: one is to reduce gastric juice reflux, and the other is to link the small air bag 104 to be squeezed by the contents in the stomach during reflux, so as to inflate the small air bag, block the cardia, and prevent reflux.

[0126] After the large balloon is inflated, it expands and expands in the stomach, forming a physical barrier to reduce the reflux of gastric juice into the esophagus. This function is very important for preventing esophagitis and other complications caused by gastric reflux.

[0127] When gastric fluid refluxes, the contents in the stomach will squeeze the large airbag. This squeezing increases the gas pressure in the large airbag, and the gas is transmitted to the small airbag 104 through the elastic valve 107. The small airbag is rapidly inflated and expanded under the action of the gas, blocking the cardia and preventing further reflux. This linkage mechanism ensures the dual protection function of the gastric tube.

[0128] During the insertion and positioning of the gastric tube, the large air balloon remains uninflated and is contracted in the hollow head 102. The medical staff can control the inflation and deflation of the large air balloon through the second thin air tube 108. After the gastric tube is positioned, the large air balloon is inflated through the second thin air tube to expand it in the stomach. The air pressure needs to be carefully adjusted during the inflation process to ensure that the large air balloon can be effectively inflated without causing excessive pressure on the gastric structure.

[0129] During use, if gastric reflux occurs, the large airbag can quickly respond to the reflux pressure through its elasticity and pressure resistance, start the linkage mechanism, and inflate the small airbag to block the cardia. The whole process does not require external operation and is completed automatically, providing efficient and reliable anti-reflux protection.

[0130] Small airbag 104:

[0131] The small airbag fixed sleeve is arranged on the front outer peripheral surface of the gastric tube body 101, and is located behind the large airbag 103. Its size is between 5-7mm in diameter (after inflation) and 10-15mm in length. These size designs ensure that the small airbag can effectively locate and block the cardia after inflation, and at the same time, it does not affect the insertion and positioning process of the gastric tube when it is not inflated.

[0132] The small airbag is made of medical grade silicone or polyurethane, which not only has good biocompatibility and can be used safely in the human body, but also has excellent elasticity and durability, and can work stably for a long time in the acidic environment of the stomach. The softness and elasticity of medical grade silicone and polyurethane enable the small airbag to expand quickly and fit the inner wall of the stomach after inflation, and quickly return to its original shape after deflation.

[0133] The small airbag is designed as a ring structure, and is fixed on the front outer surface of the gastric tube body. This ring design can ensure that the small airbag expands evenly after inflation, forming an effective physical barrier to block the cardia. In addition, the ring design of the small airbag can also effectively disperse pressure and reduce stimulation and damage to the cardia and surrounding tissues.

[0134] The small airbag has two main functions: one is to locate the cardia and reduce the movement of the gastric tube; the other is to block the cardia and prevent reflux during reflux.

[0135] Positioning the cardia: During the insertion of the gastric tube, the small airbag is inflated through the second thin trachea 108 to make it bulge. When the small airbag is blocked by the cardia and cannot be pulled back, the medical staff can determine that the small airbag is already located at the cardia. At this time, the small airbag plays a role in fixing the position of the gastric tube, preventing the gastric tube from moving in the stomach, and ensuring that the gastric tube remains stable during treatment or operation.

[0136] Reflux prevention: When gastric juice refluxes, the contents in the stomach will squeeze the large airbag, and the pressure will be transmitted through the first thin trachea 106 to inflate the small airbag. The inflated small airbag can effectively block the cardia and prevent gastric juice from further refluxing into the esophagus. This protection mechanism ensures a rapid response when reflux occurs through the linkage of the large airbag and the small airbag, providing effective reflux protection.

[0137] During the insertion and positioning of the gastric tube, the small airbag remains uninflated, and inflation and deflation are controlled by the second thin air tube 108. After the gastric tube is inserted into the stomach, the medical staff inflates the small airbag through the second thin air tube to inflate it and position it at the cardia. When reflux occurs, the gas conducted by the large airbag under pressure causes the small airbag to expand rapidly and block the cardia. After the reflux ends, the small airbag will automatically deflate and return to its original state when the pressure is released.

[0138] The design of the small airbag not only takes into account functionality, but also focuses on patient comfort. The small airbag with a ring structure can evenly disperse pressure, avoid local excessive compression, and reduce irritation and discomfort to the cardia and surrounding tissues. The use of medical-grade materials ensures that no bio-incompatibility reactions will be caused during long-term use.

[0139] The small airbag is easy to operate, and the inflation and deflation processes can be controlled by the second thin air tube outside. Medical staff can adjust the status of the small airbag at any time as needed. Its automated reflux protection mechanism ensures timely response when reflux occurs, providing continuous and reliable protection.

[0140] Elastic valve 107:

[0141] The elastic valve is located in the first thin air tube 106, and its main function is to control the flow of gas to ensure that the gas can be transferred from the large air bag 103 to the small air bag 104 under appropriate pressure conditions, thereby realizing a linkage mechanism to prevent backflow.

[0142] The elastic valve is made of silicone or polyurethane. These materials not only have excellent biocompatibility and can be used safely in the human body, but also have excellent elasticity and durability. The elastic properties of silicone and polyurethane allow the valve to open and close flexibly when subjected to gas pressure, ensuring smooth and controlled gas flow. At the same time, these materials are corrosion-resistant and can work stably for a long time in the acidic environment of the stomach without degradation or failure due to chemical reactions.

[0143] The structure of the elastic valve is an elastic reduction design. This design can open when the pressure on the elastic valve exceeds the threshold of the elastic valve to allow gas to pass. When the pressure is released, the valve will quickly return to its original state to prevent gas from flowing back. The size of the elastic valve is between 1-2mm in diameter and 5-10mm in length. These dimensions ensure that the valve can be installed in a thin air tube and has sufficient elasticity and strength to control the flow of gas.

[0144] The main function of the elastic valve is to control the gas flow from the large airbag 103 to the small airbag 104, ensuring that the gas can pass smoothly under certain conditions and preventing the gas from flowing back. Its specific functions include:

[0145] Controlling gas flow: When gastric juice refluxes, the large airbag 103 is squeezed and the gas pressure increases. At this time, the elastic valve opens under the pressure, allowing the gas to enter the small airbag 104 through the first thin air tube 106. This process ensures that the small airbag can be inflated in time to block the cardia and prevent further reflux of gastric juice.

[0146] Prevent gas backflow: When the pressure is released, the elastic valve closes quickly to prevent gas from flowing back from the small airbag 104 to the large airbag 103. In this way, the small airbag can remain inflated during the reflux process and continue to block the cardia until the reflux ends and the gas is released from the outside through the second thin trachea.

[0147] During the use of the gastric tube, the operation of the elastic valve is automatic and does not require external adjustment. Its design ensures automatic opening and closing under specific pressure conditions, achieving precise control of gas flow. When medical staff inflate the small airbag through the second thin air tube 108, the gas will enter the small airbag through the elastic valve, ensuring that the small airbag can effectively locate the cardia.

[0148] When reflux occurs, the large airbag 103 is squeezed by the contents in the stomach, and the gas pressure is transmitted to the elastic valve through the first thin air tube. When the pressure exceeds the threshold of the valve, the valve automatically opens, and the gas enters the small airbag, causing it to expand and block the cardia. After the reflux ends, the valve automatically closes to prevent gas backflow and ensure that the small airbag remains inflated.

[0149] The design of the resilient valve takes into account safety and reliability during use. Its material selection and structural design ensure the stable performance of the valve in long-term use and will not fail due to repeated use. The automated operation of the resilient valve reduces the necessity of external intervention, reduces operational complexity, and improves ease of use.

[0150] First peloton 106:

[0151] The first thin air tube 106 is mainly responsible for conducting the gas from the small air bag 104 to the large air bag 103, and realizing the two-way flow of the gas through the elastic valve 107 when necessary. Its design and function are crucial to the anti-backflow effect of the entire system.

[0152] The first thin trachea is usually made of polyethylene or polyurethane materials, which have excellent biocompatibility and can be safely used in the human body. Polyethylene and polyurethane have good elasticity and flexibility, and can withstand repeated bending and compression without affecting their performance. At the same time, these materials are corrosion-resistant and can work stably for a long time in the acidic environment of the stomach without being degraded or invalidated by chemical reactions.

[0153] The first thin trachea has a diameter of 1-2 mm and a length of 20-30 mm. These dimensions ensure that the thin trachea can effectively conduct gas in the gastric tube body 101 without affecting the overall structure of the gastric tube. The thin trachea is a slender tubular structure that can flexibly adapt to the bending and movement of the gastric tube.

[0154] One end of the first thin air tube is connected to the small air bag 104, and the other end is connected to the upper end of the large air bag 103. An elastic valve 107 is provided inside the first thin air tube to control the flow of gas. This design ensures that the gas can pass through the thin air tube smoothly when necessary, realizing the linkage between the large air bag and the small air bag.

[0155] The main function of the first thin trachea is to conduct gas, thereby realizing the linkage between the large airbag and the small airbag, including:

[0156] Conducting gas: During the reflux process, the large airbag 103 is squeezed, the gas pressure increases, and is conducted to the small airbag 104 through the first thin trachea. The elastic valve 107 opens under the pressure, allowing the gas to flow, causing the small airbag to inflate quickly, blocking the cardia and preventing gastric juice reflux.

[0157] Controlling gas flow: The elastic valve 107 inside the first thin air tube can automatically open and close when the gas pressure reaches a certain threshold, ensuring that the direction and amount of gas flow are accurately controlled to prevent gas backflow.

[0158] During the use of the gastric tube, the operation of the first thin trachea is automated and does not require external adjustment. Its design ensures that it automatically opens and closes under specific pressure conditions, achieving precise control of gas flow. When medical staff inflate the small airbag through the second thin trachea 108, the gas will enter the small airbag through the first thin trachea, ensuring that the small airbag can effectively locate the cardia.

[0159] When reflux occurs, the large airbag 103 is squeezed by the contents in the stomach, and the gas pressure is transmitted to the elastic valve through the first thin air tube. When the pressure exceeds the threshold of the valve, the valve automatically opens, and the gas enters the small airbag, causing it to expand and block the cardia. After the reflux ends, the valve automatically closes to prevent gas backflow and ensure that the small airbag remains inflated.

[0160] Second trachea 108:

[0161] The second thin air tube 108 is mainly used to control the inflation and deflation process of the small air bag 104 and the large air bag 103. Its design and function are crucial to achieve the positioning and anti-reflux effect of the gastric tube.

[0162] The second thin trachea is made of polyethylene or polyurethane materials, which have excellent biocompatibility and can be used safely in the human body. Polyethylene and polyurethane have good elasticity and flexibility, and can withstand repeated bending and compression without affecting their performance. At the same time, these materials are corrosion-resistant and can work stably for a long time in the acidic environment of the stomach without being degraded or invalidated by chemical reactions.

[0163] The size of the second thin trachea is between 1-2 mm in diameter and 500-700 mm in length. These size designs ensure that the thin trachea can effectively conduct gas in the gastric tube body 101 without affecting the overall structure of the gastric tube. The thin trachea is a slender tubular structure that can flexibly adapt to the bending and movement of the gastric tube.

[0164] One end of the second thin trachea is connected to the small air bag 104, and the other end extends to the outside of the gastric tube for medical staff to operate. This design ensures that medical staff can easily inflate and deflate the small air bag and the large air bag through the thin trachea.

[0165] The main function of the second thin trachea is to inflate or deflate the small airbag 104, thereby achieving the positioning of the gastric tube and preventing reflux, which specifically includes:

[0166] Inflation and deflation: During the insertion and positioning of the gastric tube, the medical staff inflates the small balloon through the second thin trachea to inflate it and position it at the cardia. When the gastric tube needs to be removed, the medical staff sucks the gas in the small and large balloons through the second thin trachea to make them deflate, making it easier to remove the gastric tube safely.

[0167] Control reflux: When reflux occurs, the second trachea controls the inflation and deflation of the small balloon to ensure that the small balloon can expand and block the cardia within the appropriate time to prevent further reflux of gastric juice.

[0168] During the use of the gastric tube, the operation of the second thin trachea is mainly performed by medical staff. Through the thin trachea connected to the external syringe interface, medical staff can easily inflate or deflate the small air bag to ensure the correct positioning of the gastric tube in the stomach and the anti-reflux function.

[0169] During the insertion of the gastric tube, the medical staff inflates the small balloon through the second thin trachea to make it swell and position it at the cardia. After the position is determined, the inflation state of the small balloon can be maintained to ensure the stability of the gastric tube. When the gastric tube needs to be removed, the gas in the small balloon and the large balloon is sucked out through the second thin trachea to make them shrink and facilitate removal.

[0170] Specifically, the specific structure of the elastic valve 107 can be selected from the following structures:

[0171] Structure 1:

[0172] The elastic valve 107 is directly formed by a section of the first thin air tube 106, and is designed as a flat valve structure, which controls the flow of gas through the natural elasticity of the body. The structure of this flat part is in a close-fitting and closed state under normal conditions, which can prevent the passage of gas; when the internal gas pressure exceeds the set threshold, this part will be stretched outward to form a through state, allowing gas to flow.

[0173] 1. Shape of the valve body: The first thin air tube 106 of this part is designed to be flat, and its appearance is similar to a flattened pipe area. Specifically, the cross section of this pipe section is flat oval, which is different from the circular cross section of other parts. In the closed state, the inner walls of both sides of the flat part naturally fit together to form a complete sealing structure to prevent gas flow.

[0174] 2. Wall characteristics: The wall thickness of the valve part is slightly thinner than other parts to increase elasticity and flexibility, so that it can easily support and rebound quickly under pressure. In terms of material selection, highly elastic and corrosion-resistant medical-grade silicone or polyurethane is preferred. The inner wall needs to be kept smooth to avoid excessive resistance or unstable airflow during gas flow, thereby improving the flow efficiency of the valve.

[0175] 3. Size design: The length of the elastic valve part is usually 8-12 mm, which is enough to provide sufficient sealing area and structural stability without affecting the overall flexibility and function of the tube. In the closed state, the width of the flat area is about 4-6 mm, and the specific size is designed according to the diameter of the gastric tube and the use requirements. This width should be enough to ensure that when the pressure increases, the inner wall can separate and form a smooth airflow channel. The wall thickness is generally 0.5-1 mm, ensuring sufficient elasticity and durability, and can respond quickly under pressure without excessive deformation.

[0176] 4. Working principle and performance characteristics: In the closed state, when there is no external pressure or the pressure is low, the flat inner walls on both sides fit tightly due to the natural resilience of the material, forming a completely closed valve state to prevent gas from passing through. At this time, the valve will not leak, ensuring that the gas in the system remains stable.

[0177] When the pressure exceeds the threshold, the gas pressure increases and exceeds the set threshold, and the airflow pushes the inner wall of the flat part to expand outward. The valve body is expanded into a nearly circular cross-section, forming a smooth airflow channel, allowing the gas to pass smoothly.

[0178] Once the pressure returns to normal, the valve body quickly rebounds, the inner wall refits, and returns to the closed state. The whole process is responsive and can effectively regulate gas flow to ensure the normal operation of the anti-reflux function of the gastric tube.

[0179] Structure 2:

[0180] Design of elastic valve structure imitating artificial heart valve

[0181] 1. Overall structure description

[0182] Shape and layout: The elastic valve part is designed to imitate the structure of an artificial heart valve, forming a valve-like opening and closing structure in the flat area of ​​the first thin trachea, similar to a three-leaf or two-leaf valve. The valve is in the shape of a leaf, and can automatically open and close when the gas pressure changes to control the airflow.

[0183] Valve material: The valve is made of highly elastic, biocompatible materials (such as medical silicone or polyurethane) to ensure that it can maintain its elasticity and sealing after multiple opening and closing, similar to the elasticity of biological tissue.

[0184] 2. Valve structure and characteristics

[0185] Petal design: The number of petals can be two or three, similar to biological heart valves, and the petals are evenly distributed along the inner wall of the tube. Each valve has an arc-shaped edge in the middle, which can fit closely with the adjacent petals to form a complete sealing structure.

[0186] Naturally closed state: In the natural state, the petals fit tightly against each other to form a completely closed valve, preventing the flow of gas. The edges of the petals are precisely processed to ensure that there is no gas leakage when closed.

[0187] Opening and closing mechanism: When the gas pressure exceeds the set threshold, the petals are pushed open by the pressure, and turn or bend outward along the tube wall to form a smooth airflow channel. After the pressure is released, the petals quickly rebound by relying on elasticity and structural tension, and close and seal again.

[0188] 3. Size and shape optimization

[0189] Petal thickness: The thickness of each valve is 0.3-0.5 mm, which can maintain good elasticity and provide sufficient support to resist reverse pressure.

[0190] Opening diameter: When the valve is fully opened, the diameter of the airflow channel formed is slightly smaller than the inner diameter of the first trachea, usually 80-90% of the inner diameter, to ensure smooth airflow while maintaining the stability of the petal.

[0191] Petal shape: Each petal is in the shape of an arc-shaped triangle with curved edges to reduce airflow resistance and improve opening and closing efficiency. The tip of the petal is rounded to avoid damage or wear.

[0192] 4. Functional advantages

[0193] Efficient airflow control: The artificial heart valve-like design can respond quickly to changes in gas pressure, provide efficient airflow control, and reduce airflow resistance. The curved edges of the flaps help guide the airflow, reducing turbulence and energy loss.

[0194] Excellent sealing performance: The petals fit tightly in their natural state to form a seamless seal, ensuring that there will be no gas leakage when the system is under no pressure or low pressure, suitable for precise gas control needs.

[0195] Durability and stability: The use of highly elastic materials and bionic structures ensures that the valve can maintain good sealing and elasticity after multiple opening and closing cycles, making it suitable for long-term use.

[0196] 5. Working Principle

[0197] Normal state: When there is no significant pressure, the flaps fit together tightly due to the elasticity of the material, preventing gas from passing through. At this time, the elastic valve remains closed to ensure stable air pressure inside the system.

[0198] When the pressure increases: When the gas pressure gradually increases and exceeds the threshold, the airflow pushes the flaps to bend or flip outward to form an airflow channel. The flexible structure of the flaps can quickly adapt to pressure changes and allow airflow to pass smoothly.

[0199] When the pressure decreases: When the gas pressure drops below the threshold, the petals quickly close due to their elasticity and inherent tension, returning to a natural fit and blocking the gas flow again. The whole process is fast, stable and reliable.

[0200] The superiority and wide applicability of the gastric tube with anti-reflux function in actual clinical applications significantly improve the treatment effect and quality of life of patients:

[0201] Case 1: Preventing esophageal damage caused by gastric reflux and ensuring nutritional supplementation

[0202] Patient background: A 65-year-old male patient was diagnosed with severe gastroesophageal reflux disease (GERD) and needed nutritional supplements through a gastric tube due to difficulty in eating. Traditional gastric tubes failed to effectively prevent gastric reflux, leading to worsening of esophagitis.

[0203] Implementation: A gastric tube device with anti-reflux function is used for gastric tube insertion. The second thin trachea is inflated, the small balloon accurately locates the cardia, and the large balloon expands in the stomach to prevent gastric juice reflux. Nutrient solution is delivered to the patient through the gastric tube to ensure the patient's nutritional needs.

[0204] Results: The patient's esophagitis symptoms were significantly relieved, gastric reflux was effectively controlled, nutritional supplementation was carried out smoothly, and the patient's weight and nutritional status were improved. The new gastric tube improved the patient's comfort and treatment effect.

[0205] Case 2: Prevention of postoperative vomiting and related complications and gastric decompression

[0206] Patient background: A 45-year-old female patient required long-term intubation after gastric surgery to prevent postoperative vomiting and related complications, and required gastric decompression. Traditional gastric tubes are difficult to effectively prevent gastric reflux caused by postoperative vomiting.

[0207] Implementation: Anti-reflux gastric tube device is used in the early postoperative period. The small balloon is inflated to locate the cardia, and the large balloon is inflated to ensure that the gastric contents do not reflux into the esophagus. The gastric tube is used to decompress the stomach, reduce the pressure in the stomach, and prevent vomiting. At the same time, the gas pressure of the balloon is monitored and adjusted to ensure the normal operation of the device.

[0208] Results: No vomiting occurred after surgery, gastric reflux was effectively controlled, and the occurrence of postoperative complications was reduced. Gastric decompression effectively alleviated the patient's postoperative discomfort and accelerated recovery. It improved the patient's quality of life and postoperative recovery effect.

[0209] Case 3: Symptom relief and drug delivery for patients with chronic gastrointestinal diseases

[0210] Patient background: A 55-year-old male patient suffered from chronic gastrointestinal diseases, including acid reflux and chronic gastritis, and needed to deliver drugs through a gastric tube. Conventional gastric tubes could not effectively prevent gastric reflux, and the patient had been troubled by esophageal discomfort caused by acid reflux for a long time.

[0211] Implementation: Patients are intubated during hospitalization using a gastric tube device with anti-reflux function. The small balloon is inflated to locate the cardia, and the large balloon is inflated to form an effective anti-reflux barrier. Drugs are delivered through the gastric tube to ensure that the drugs effectively reach the stomach and take effect. The balloon gas pressure is regularly checked and adjusted to ensure the best effect.

[0212] Results: The patient's acid reflux was significantly reduced, and the symptoms of chronic gastritis were significantly relieved. The drug delivery was smooth and the drug efficacy was significant. After using the new gastric tube, the patient's quality of life was significantly improved, and esophageal discomfort was significantly reduced.

[0213] The above three clinical cases demonstrate the application effects of gastric tube devices with anti-reflux function in different types of patients. In addition to preventing gastric reflux, this new type of gastric tube also retains the original functions of the gastric tube, such as nutritional supplementation, gastric decompression and drug delivery. Its superiority and wide applicability in actual clinical applications have significantly improved the treatment effect and quality of life of patients.

[0214] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gastric tube device with anti-reflux function, comprising a main mechanism (1) and an auxiliary mechanism (2), characterized in that: The main body (1) comprises: A gastric tube body (101), one end of which is inserted into the patient's stomach and the other end is connected to the outside; A hollow head (102) is fixedly mounted on the front end of the stomach tube body (101); The large air bag (103) is fixedly arranged at the front end of the stomach tube body (101), and is contracted in the hollow head (102) when not inflated, and expands and unfolds in the stomach after being inflated; The small air bag (104) is annular and fixedly mounted on the front outer peripheral surface of the stomach tube body (101) and is located behind the large air bag (103); A first thin air tube (106) is disposed in the gastric tube body (101), one end of which is connected to the small air bag (104) and the other end of which is connected to the upper end of the large air bag (103) for conducting gas; A second thin air tube (108), which is disposed in the stomach tube body (101), has one end connected to the small air bag (104), and the other end extending to the outside of the stomach tube, and is used for suction and inflation; The elastic valve (107) is arranged in the first thin air tube (106) to control the flow of gas.

2. The stomach tube device with anti-reflux function according to claim 1, characterized in that: The auxiliary mechanism (2) comprises: A connector (201) is fixedly mounted on the rear end of the stomach tube body (101); A syringe interface (206), arranged on the inner side of the connector (201), for connecting a syringe for gas regulation and nutrient supplementation; A protective cover (207) and a sealing block (208) are movably mounted on the connector (201) and are used to protect the syringe interface (206); The wearing rope (203) and the rubber ring (204) are used to fix the gastric tube body (101) behind the patient's ear to provide wearing comfort.

3. The stomach tube device with anti-reflux function according to claim 1, characterized in that: The elastic valve (107) is an elastic reduced diameter structure, which opens when the force exerted by the gas pressure on it exceeds its elastic threshold value to allow gas to pass through.

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