A clogging-resistant gastrointestinal tube combined with nasopharyngeal suction catheter

Abstract

This utility model discloses a gastrointestinal tube nasopharyngeal suction combined catheter that can prevent blockage, comprising: a first airbag and a second airbag, respectively disposed on the front and rear outer walls of the negative pressure suction port for sputum suction of the combined catheter body; a first inflation tube and a second inflation tube, respectively disposed inside the negative pressure suction chamber and the nutrition chamber of the combined catheter body, with the air outlet of the first inflation tube communicating with the interior of the second airbag, and the air outlet of the second inflation tube communicating with the interior of the first airbag; a positive and negative pressure combined supply system, wherein the positive pressure alternating supply part is sequentially connected to the air inlets of the first inflation tube and the second inflation tube, so that the first airbag and the second airbag can be alternately inflated, causing the combined catheter body to vibrate, causing sputum on the inner wall of the negative pressure suction chamber to fall off.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a gastrointestinal tube nasopharyngeal suction combined catheter that can prevent blockage. Background Technology

[0002] In intensive care units (ICUs), patients' conditions are often critical and complex. Due to weakened immunity and metabolic abnormalities, critically ill patients frequently face the risk of malnutrition. Malnutrition not only affects treatment outcomes but also prolongs recovery time. Therefore, scientific and appropriate nutritional support is crucial for the recovery of critically ill patients, with enteral nutrition being hailed as a "recovery accelerator."

[0003] In clinical nursing, a nasogastric tube is often inserted to deliver necessary water and food to patients with swallowing difficulties. However, patients with nasogastric tubes often experience excessive secretions such as oral secretions, saliva, respiratory mucus, and sputum due to physiological reactions or other causes. This can obstruct the airway, leading to breathing difficulties or fluid reflux and aspiration, posing a risk of lung infection. Therefore, additional suctioning and oral care are necessary. Using a suction catheter on patients already with a nasogastric tube increases discomfort and pain. To address these issues, a combined gastrointestinal tube and nasopharyngeal suction catheter has emerged, serving two purposes simultaneously: gastric nutrition and pharyngeal sputum suction. This catheter avoids the secondary harm caused by repeated intubation in clinical practice.

[0004] However, a thorny problem also exists in the suctioning process: sputum is very easy to stick to the catheter. Sputum adhesion not only affects the patency of the catheter and reduces suction efficiency, but also causes blockage, making the suctioning operation impossible and even causing serious consequences such as airway obstruction in patients. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a gastrointestinal tube-nasopharyngeal aspiration combined catheter that is clogging-proof.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A clogging-resistant gastrointestinal tube combined with nasopharyngeal aspiration catheter, comprising:

[0008] The first and second airbags are respectively installed on the outer walls of the negative pressure suction port on both sides of the combined catheter body for suctioning sputum.

[0009] The first inflation tube and the second inflation tube are respectively located inside the negative pressure suction chamber and the nutrition chamber in the combined catheter body, and the air outlet of the first inflation tube is connected to the inside of the second airbag, and the air outlet of the second inflation tube is connected to the inside of the first airbag.

[0010] The positive and negative pressure combined supply system has a positive pressure alternating supply section that is connected in sequence to the air inlets of the first and second air inlets, so that the first and second air bags can be inflated alternately, and the combined catheter body shakes, causing the sputum on the inner wall of the negative pressure suction cavity to fall off.

[0011] The anterior segment of the combined catheter body is a nasopharyngeal suction catheter, and the posterior segment is a gastrointestinal tube.

[0012] The inner wall of the combined catheter body is provided with a diaphragm along its length. The diaphragm divides the inner wall of the combined catheter body into a negative pressure suction cavity and a nutrition cavity. The negative pressure suction cavity corresponds to the nasopharyngeal suction catheter section, and the nutrition cavity corresponds to the gastrointestinal tube section.

[0013] The negative pressure suction port is located on the side wall of the nasopharyngeal suction catheter section; several nutrient discharge ports are provided on the side wall of the gastrointestinal tube section.

[0014] A contrasting line is provided on the outer wall of the nasopharyngeal suction catheter; a contrasting line is provided on the outer wall of the gastrointestinal tube or a contrasting layer is provided on the outer wall of the entire tube.

[0015] The inlet end of the combined catheter body is respectively provided with a negative pressure suction chamber connector, a nutrition chamber connector, a first inflation tube connector, and a second inflation tube connector.

[0016] The negative pressure suction chamber connector is connected to the negative pressure suction chamber; the nutrient chamber connector is connected to the nutrient chamber; the first inflation tube connector is connected to the air inlet of the first inflation tube; and the second inflation tube connector is connected to the air inlet of the second inflation tube.

[0017] The combined positive and negative pressure supply system includes:

[0018] Positive pressure source and negative pressure source;

[0019] Buffer tank, connected to a positive pressure source;

[0020] The system includes a main air line and a secondary air line. The secondary air line is connected to the buffer tank and then to the nutrient input port via a first solenoid valve. The main air line is connected to the first airbag port and the second airbag port in sequence via a first three-way solenoid valve and a second three-way solenoid valve.

[0021] The second solenoid valve has its inlet end connected to the negative pressure source and its outlet end equipped with a negative pressure suction port.

[0022] The first solenoid valve and the second solenoid valve are connected to the controller; the first three-way solenoid valve and the second three-way solenoid valve are connected to the controller. The controller alternately energizes the first three-way solenoid valve and the second three-way solenoid valve to achieve alternating inflation of the first airbag and the second airbag.

[0023] This utility model also includes:

[0024] A flow sensor is installed inside the nutrient chamber and connected to the controller;

[0025] The first air pressure sensor is installed on the main air line to detect the pressure of the first airbag and the second airbag, and is connected to the controller.

[0026] The second pressure sensor is installed on the pipeline of the negative pressure source to detect the pressure inside the negative pressure suction chamber and is connected to the controller.

[0027] The beneficial effects of this utility model are:

[0028] 1. This utility model reduces the number of intubations and minimizes secondary harm to patients. The alternating inflation of the first and second airbags causes the tubing to vibrate, which facilitates sputum expectoration. The second air pressure sensor monitors the pressure inside the negative pressure suction chamber in real time, reducing the harm caused by prolonged negative pressure suction.

[0029] 2. This invention utilizes vibration to separate sputum, solving the problem of sputum adhesion around the negative pressure suction port in the pharyngeal region. During negative pressure suction, the suction port may adhere to the mucosa. When the balloon is inflated, it acts as a physical barrier, preventing the suction port from sticking to the wall and causing damage to the mucosa. By integrating negative pressure suction, enteral nutrition, and pharyngeal vibration into one device, the number of ward equipment is reduced, offering three functions in one machine. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 for Figure 1 AA section view in the middle;

[0032] Figure 3 for Figure 1 BB section view in the middle;

[0033] Figure 4 This is a cross-sectional view of the nasopharyngeal suction catheter portion and the gastrointestinal tube portion of this utility model;

[0034] Figure 5 This is a schematic diagram of the positive and negative pressure combined supply system of this utility model;

[0035] The components are as follows: 1. Negative pressure suction chamber connector; 2. Nutrition chamber connector; 3. Nasopharyngeal suction catheter section; 4. First airbag; 5. Negative pressure suction port; 6. Second airbag; 7. Gastrointestinal tube section; 8. First inflation tube connector; 9. Second inflation tube connector; 10. Nutrition chamber; 11. Second inflation tube; 12. Negative pressure suction chamber; 13. First inflation tube; 14. Positive pressure source; 15. Buffer tank; 16. Flow sensor; 17. Controller; 18. Auxiliary air line; 19. First solenoid valve; 20. Nutrition input port; 21. First three-way solenoid valve; 22. Second three-way solenoid valve; 23. Main air line; 24. First air pressure sensor; 25. First airbag port; 26. Negative pressure suction port; 27. Second solenoid valve; 28. Second air pressure sensor; 29. ​​Negative pressure source; 30. Second airbag port. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0037] like Figures 1 to 5 As shown, a clogging-resistant gastrointestinal tube nasopharyngeal suction combined catheter includes: a first airbag 4 and a second airbag 6, respectively disposed on the front and rear outer walls of the negative pressure suction port 5 for sputum suction on the combined catheter body; a first inflation tube 13 and a second inflation tube 11, respectively disposed inside the negative pressure suction chamber 12 and the nutrition chamber 10 within the combined catheter body, with the air outlet of the first inflation tube 13 connected to the interior of the second airbag 6, and the air outlet of the second inflation tube 11 connected to the interior of the first airbag 4; a positive and negative pressure combined supply system, wherein the positive pressure alternating supply part is sequentially connected to the air inlets of the first inflation tube 13 and the second inflation tube 11, so that the first airbag 4 and the second airbag 6 can be alternately inflated, causing the combined catheter body to vibrate and causing sputum on the inner wall of the negative pressure suction chamber 12 to fall off.

[0038] like Figure 1 As shown, the anterior segment of the combined catheter body is the nasopharyngeal suction catheter section 3, and the posterior segment is the gastrointestinal tube section 7;

[0039] like Figure 1 and Figure 4As shown, a diaphragm is provided along the length of the inner wall of the combined catheter body, dividing the inner wall of the combined catheter body into a negative pressure suction chamber 12 and a nutrition chamber 10. The negative pressure suction chamber 12 corresponds to the nasopharyngeal suction catheter section 3, and the nutrition chamber 10 corresponds to the gastrointestinal tube section 7. The negative pressure suction port 5 is located on the side wall of the nasopharyngeal suction catheter section 3. Several nutrient discharge holes are provided on the side wall of the gastrointestinal tube section 7. A contrasting line is provided on the outer wall of the nasopharyngeal suction catheter section 3; a contrasting line is provided on the outer wall of the gastrointestinal tube section 7, or a contrasting layer is provided on the entire outer wall of the tube.

[0040] like Figure 1 and Figure 4 As shown, the inlet end of the combined catheter body is respectively provided with a negative pressure suction chamber connector 1, a nutrition chamber connector 2, a first inflation tube connector 8, and a second inflation tube connector 9; wherein, the negative pressure suction chamber connector 1 is connected to the negative pressure suction chamber 12; the nutrition chamber connector 2 is connected to the nutrition chamber 10; the first inflation tube connector 8 is connected to the air inlet of the first inflation tube 13; and the second inflation tube connector 9 is connected to the air inlet of the second inflation tube 11.

[0041] like Figure 5 As shown, the combined positive and negative pressure supply system includes: a positive pressure source 14 and a negative pressure source 29; a buffer tank 15 connected to the positive pressure source 14; a main air pipeline 23 and an auxiliary air pipeline 18, wherein the auxiliary air pipeline 18 is connected to the buffer tank 15 and then connected to the nutrient input port 20 via a first solenoid valve 19; the main air pipeline 23 is connected to the first airbag port 25 and the second airbag port 30 in sequence via a first three-way solenoid valve 21 and a second three-way solenoid valve 22; a second solenoid valve 27, with its inlet end connected to the negative pressure source 29 and its outlet end equipped with a negative pressure suction port 26; wherein the first solenoid valve 19 and the second solenoid valve 27 are respectively connected to the controller 17; the first three-way solenoid valve 21 and the second three-way solenoid valve 22 are respectively connected to the controller 17, and the controller 17 alternately energizes the first three-way solenoid valve 21 and the second three-way solenoid valve 22 to realize the alternating inflation of the first airbag 4 and the second airbag 6.

[0042] like Figure 5 As shown, this utility model also includes: a flow sensor 16, which is installed in the nutrient chamber 10 and connected to the controller 17; a first air pressure sensor 24, which is installed on the main air pipeline 23 to detect the pressure of the first airbag 4 and the second airbag 6 and is connected to the controller 17; and a second air pressure sensor 28, which is installed on the pipeline of the negative pressure source 29 to detect the pressure in the negative pressure suction chamber 12 and is connected to the controller 17.

[0043] In use, the guide wire is placed in the nutrition chamber 10. The diameter of the guide wire is smaller than the inner diameter of the nutrition chamber 10. One end of the guide wire is connected to the guide wire connector. The negative pressure suction chamber connector 1, the nutrition chamber connector 2, the first air inflator connector 8, and the second air inflator connector 9 are all equipped with appropriate connector caps. The negative pressure suction chamber connector 1, the nutrition chamber connector 2, the first inflation tube connector 8, and the second inflation tube connector 9 are connected to the nasopharyngeal suction catheter section 3. In the nasopharyngeal suction catheter section 3, the negative pressure suction chamber 12 and the nutrition chamber 10 each have a semi-circular cross-section. The negative pressure suction chamber 12 has two holes called negative pressure suction holes 5, and in the same direction, a first airbag 4 and a second airbag 6 are provided at both ends of the two holes. During operation, a negative pressure adhering phenomenon will occur around the negative pressure suction hole 5, or blockage may occur during suctioning. At this time, the controller 17 alternately inflates the first airbag 4 and the second airbag 6. Due to the corresponding installation of the first three-way solenoid valve 21 and the second three-way solenoid valve 22, the periodic high-frequency inflation and deflation of the airbags is realized, which generates rapid small-amplitude vibration, clears the adhering material, and solves the problem of reflux blockage. The end of the nasopharyngeal suction catheter section 3 is connected to the end of the gastrointestinal tube section 7 at a distance of 45-110cm using a rubber injection molding process, and the nutrition channels of the two are seamlessly connected. The negative pressure suction chamber 12 is closed at the connection point. The nasopharyngeal suction catheter section 3 has a contrast line, and the gastrointestinal tube section 7 has a contrast line or the entire tube is contrasted to facilitate observation under X-ray; the gastrointestinal tube section 7 has an opening for the nutrient solution injected through the tube to flow into the gastrointestinal tract.

[0044] The nasopharyngeal suction catheter section 3 and the gastrointestinal tube section 7 are both made of medical-grade TPU, the guidewire is made of SUS304, the connector is made of PVC / PE, and the first airbag 4 and the second airbag 6 are made of PU.

[0045] During application, keep the patient supine. Using the first hole proximal to the upper end of the gastrointestinal tube 7 as the measurement starting point, measure the distance L from the earlobe to the tip of the nose along the connector direction and mark it to determine the location of the pharyngeal region. Apply paraffin-coated cotton balls to the catheter body to facilitate insertion. Select one nasal cavity and slowly insert the catheter along the nasal cavity wall. Gastric fluid can be directly aspirated using a syringe connected to the main cavity to confirm whether the gastrointestinal tube is in the stomach, or the location can be determined under X-ray guidance. After inserting the catheter into the predetermined position, inject at least 20 ml of sterile saline or sterile water and remove the guidewire. First, inject 20 ml of warm water into the nutrition chamber 10 through the nutrition chamber connector 2. Then, connect the nutrition tubing and nutrition input port 20 to the nutrition chamber connector 2, respectively. Connect the negative pressure suction port 26 to the negative pressure suction chamber connector 1. Connect the first balloon port 25 and the second balloon port 30 to the first inflation tube connector 8 and the second inflation tube connector 9, respectively. Check for secretions and aspirate any refluxed material or mucus from the pharyngeal region to prevent aspiration.

[0046] Procedure: Step 1: Determine the location of the pharyngeal region. The method is as follows: Using the first orifice proximal to the 7th segment of the gastrointestinal tract as the starting point, measure the distance L from the earlobe to the tip of the nose along the connector direction. For adults, this is generally 10-14cm; for children, it is generally 5-7cm. Mark this distance; this is the nasal cavity measurement after intubation: 45+L, generally 55-59cm. Step 2: Apply paraffin wax to the catheter tube to facilitate insertion. Select one nasal cavity and slowly insert the catheter along the nasal cavity wall. When the catheter enters the larynx, the insertion depth is 10-14cm for adults and 5-7cm for children. Gently bend the patient's head forward and ask the patient to swallow as much as possible while simultaneously adjusting the catheter. Gently advance the tube, do not force it in, and be careful to avoid accidentally inserting it into the trachea. Continue inserting the tube to the marked position described in step one. In the third step, use a syringe connected to the feeding chamber connector 2 to directly aspirate gastric fluid. This is the most reliable way to determine if the gastric tube is in the stomach. If no gastric fluid is aspirated, inject 20ml of cold saline and then aspirate again. Alternatively, when injecting 10ml of air into the gastric tube along the main lumen with a syringe, a sound of air passing through water can be heard under the xiphoid process with a stethoscope. The position can also be confirmed under X-ray guidance. In the fourth step, after the catheter is inserted into the predetermined position, inject at least 20ml of sterile saline or sterile water into the gastric tube along the main lumen, and then slowly pull out the guidewire. In the fifth step, inject 20ml of warm water from the main lumen to rinse the inner wall of the catheter. After the above work is completed, connect the nutrient tubing and nutrient inlet port 20 to the nutrient chamber connector 2 respectively, and input the nutrient solution according to the "Nutrition Pump Infusion Requirements"; sixth step, connect the negative pressure suction port 26 to the negative pressure suction chamber connector 1, check if there is any secretion being suctioned out, adjust the negative pressure, generally from -40Kpa to -55Kpa, adjust the negative pressure according to the patient's condition, suction out refluxed material or mucus in the pharyngeal area to prevent aspiration; seventh step, if the sputum adheres to the wall or is blocked during suctioning, periodic high-frequency inflation and deflation can be performed through the first inflation tube connector 8 and the second inflation tube connector 9 to the first air bag port 25 and the second air bag port 30 respectively, so that it generates rapid small-amplitude vibration, clearing the adhering material and solving the reflux blockage problem.

[0047] The positive pressure source 14 and the negative pressure source 29 can be vacuum pumps or peristaltic pumps; the controller 17 can be a PLC, microcontroller, Arduino or other timing controller. The timing control module on the controller 17 is used to set the on / off interval of the first three-way solenoid valve 21 and the second three-way solenoid valve 22 to realize the alternating inflation of the first airbag 4 and the second airbag 6. Since three-way solenoid valves are used, the three-way solenoid valves corresponding to the first airbag 4 and the second airbag 6 can be inflated after being energized. When the corresponding three-way solenoid valves are de-energized, their own vents will release the gas in the airbags, waiting for the next energization to inflate, so that the first airbag 4 and the second airbag 6 can be inflated alternately.

[0048] A flow sensor 16 is installed inside the nutrient chamber 10 and is connected to the controller 17. This allows the operator to monitor the injection volume in the nutrient chamber 10 in real time. Furthermore, the injection volume parameter can be set on the controller 17. When the flow sensor 16 detects that the injection volume has reached the preset value, the flow sensor 16 will transmit a signal to the controller 17. The controller 17 will then close the first solenoid valve 19 to stop the gas supply, thereby stopping the injection of the nutrient solution.

[0049] During negative pressure suction, the pressure inside the tubing gradually decreases as sputum is suctioned out. When the second pressure sensor 28 detects that the pressure inside the tubing has dropped to a certain set value, it indicates that the sputum has been suctioned out. The second pressure sensor 28 transmits a signal to the controller 17, which then uses the negative pressure source 29 and the second solenoid valve 27 to reduce the suction intensity, preventing unnecessary harm to the patient. Conversely, if the pressure inside the tubing abnormally increases, exceeding the preset maximum pressure value, a blockage may have occurred. The controller 17 will then shut off the negative pressure source 29 and the second solenoid valve 27, stopping the negative pressure suction to protect the patient's safety. The pressure parameter refers to the safe suction pressure value: no more than 300 mmHg for adults and no more than 150 mmHg for children.

[0050] The first pressure sensor 24 is used to detect the pressure of the first airbag 4 and the second airbag 6. The principle is as follows: when the first airbag 4 is inflated and reaches the set pressure, the first pressure sensor 24 transmits a signal to the controller 17. The controller 17 disconnects the first three-way solenoid valve 21, the passage of the first three-way solenoid valve 21 is closed, the vent is opened, and the first airbag 4 deflates. At the same time, the controller 17 energizes the second three-way solenoid valve 22, the second three-way solenoid valve 22 is energized and connected, and the second airbag 6 begins to inflate. When the set pressure is reached, the first pressure sensor 24 transmits a signal to the controller 17, the controller 17 disconnects the second three-way solenoid valve 22, the passage of the second three-way solenoid valve 22 is closed, the vent is opened, and the second airbag 6 deflates. This process is repeated to realize the alternating inflation of the first airbag 4 and the second airbag 6.

[0051] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A clogging-resistant gastrointestinal tube combined with nasopharyngeal aspiration catheter, characterized in that, include: The first airbag (4) and the second airbag (6) are respectively set on the outer walls of the negative pressure suction port (5) for suctioning sputum on the front and back sides of the combined catheter body; The first inflation tube (13) and the second inflation tube (11) are respectively located inside the negative pressure suction chamber (12) and the nutrition chamber (10) in the combined catheter body, and the air outlet of the first inflation tube (13) is connected to the inside of the second air bag (6), and the air outlet of the second inflation tube (11) is connected to the inside of the first air bag (4). The positive and negative pressure combined supply system has its positive pressure alternating supply part connected to the air inlet of the first inflation tube (13) and the second inflation tube (11) in sequence, so that the first air bag (4) and the second air bag (6) can be alternately inflated, and the combined catheter body shakes, causing the sputum on the inner wall of the negative pressure suction chamber (12) to fall off.

2. The gastrointestinal tube nasopharyngeal aspiration combined catheter with anti-clogging capability according to claim 1, characterized in that: The anterior segment of the combined catheter body is the nasopharyngeal suction catheter part (3), and the posterior segment is the gastrointestinal tube part (7). The inner wall of the combined catheter body is provided with a diaphragm along its length, which divides the inner wall of the combined catheter body into a negative pressure suction chamber (12) and a nutrition chamber (10). The negative pressure suction chamber (12) corresponds to the nasopharyngeal suction catheter section (3), and the nutrition chamber (10) corresponds to the gastrointestinal tube section (7). The negative pressure suction hole (5) is located on the side wall of the nasopharyngeal suction catheter section (3); a number of nutrient discharge holes are provided on the side wall of the gastrointestinal tube section (7).

3. The gastrointestinal tube nasopharyngeal aspiration combined catheter with anti-clogging capability according to claim 2, characterized in that: A contrast line is provided on the outer wall of the nasopharyngeal suction catheter part (3); a contrast line is provided on the outer wall of the gastrointestinal tube part (7) or a contrast layer is provided on the outer wall of the entire tube.

4. The gastrointestinal tube nasopharyngeal aspiration combined catheter with anti-clogging capability according to claim 2, characterized in that, The inlet end of the combined catheter body is respectively provided with a negative pressure suction chamber connector (1), a nutrition chamber connector (2), a first inflation tube connector (8), and a second inflation tube connector (9). Among them, the negative pressure suction chamber connector (1) is connected to the negative pressure suction chamber (12); the nutrition chamber connector (2) is connected to the nutrition chamber (10); the first inflation pipe connector (8) is connected to the air inlet of the first inflation pipe (13); and the second inflation pipe connector (9) is connected to the air inlet of the second inflation pipe (11).

5. The gastrointestinal tube nasopharyngeal aspiration combined catheter with anti-clogging capability according to claim 4, characterized in that, The combined positive and negative pressure supply system includes: Positive pressure source (14) and negative pressure source (29); A buffer tank (15) is connected to a positive pressure source (14); The main air line (23) and the auxiliary air line (18) are connected, wherein the auxiliary air line (18) is connected to the buffer tank (15) and then connected to the nutrient input port (20) through the first solenoid valve (19); the main air line (23) is connected to the first airbag port (25) and the second airbag port (30) in sequence through the first three-way solenoid valve (21) and the second three-way solenoid valve (22); The second solenoid valve (27) has its inlet end connected to the negative pressure source (29) and its outlet end equipped with a negative pressure suction port (26). Among them, the first solenoid valve (19) and the second solenoid valve (27) are respectively connected to the controller (17); the first three-way solenoid valve (21) and the second three-way solenoid valve (22) are respectively connected to the controller (17). The controller (17) alternately powers the first three-way solenoid valve (21) and the second three-way solenoid valve (22) to realize the alternating inflation of the first airbag (4) and the second airbag (6).

6. A gastrointestinal tube nasopharyngeal aspiration combined catheter with anti-clogging capability according to claim 5, characterized in that, Also includes: A flow sensor (16) is installed inside the nutrient chamber (10) and connected to the controller (17); The first air pressure sensor (24) is installed on the main air pipeline (23) to detect the pressure of the first airbag (4) and the second airbag (6) and is connected to the controller (17); The second pressure sensor (28) is installed on the pipeline of the negative pressure source (29) to detect the pressure in the negative pressure suction chamber (12) and is connected to the controller (17).

Images