A gastric lavage device for emergency medicine

Abstract

This invention relates to the field of medical device technology and discloses a gastric lavage device for emergency internal medicine, including a base, a main control box mounted on the base, a gastric lavage fluid supply module, a negative pressure suction module, and a double-lumen gastric tube. The main control box is equipped with a temperature control module and a display panel. The gastric lavage fluid supply module includes a gastric lavage fluid container and an inlet pump located within the main control box, with the inlet of the inlet pump connected to the gastric lavage fluid container. The negative pressure suction module includes a waste collection tank and a negative pressure suction pump located within the main control box, with the outlet of the negative pressure suction pump connected to the waste collection tank. The double-lumen gastric tube includes an inner tube and an outer tube arranged coaxially. The inner tube forms an outlet channel, and the annular gap between the inner and outer tubes forms an inlet channel. Several rinsing side holes are circumferentially formed on the side wall of the outer tube near its front end. This invention improves the safety, stability, and convenience of emergency gastric lavage through intelligent pressure control, closed-loop constant temperature, anti-bite and anti-detachment design, and a clean / dirty separation structure.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a gastric lavage device for use in emergency internal medicine. Background Technology

[0002] In the emergency internal medicine department, gastric lavage is one of the most crucial and frequently used emergency measures when treating patients with oral poisoning. The principle is to repeatedly infuse the stomach with lavage fluid and then aspirate it to remove unabsorbed toxins or harmful substances. Currently, clinical practice mainly relies on electric gastric lavage machines in conjunction with gastric tubes to complete the procedure. Compared to traditional funnel-type gastric lavage, this method has made some progress in reducing the workload of medical staff. However, it still has many shortcomings in practical clinical application, mainly in the following aspects:

[0003] Existing gastric lavage devices mostly employ simple timed or pressure-controlled systems, lacking precise monitoring of the dynamic balance between inflow and outflow. When outflow is obstructed, it can easily lead to a large retention of lavage fluid in the stomach, causing serious complications such as acute gastric dilatation, vomiting, or even aspiration. Conversely, blindly increasing negative pressure to address obstructed outflow can easily cause forceful suction injury and bleeding of the patient's gastric mucosa. Furthermore, existing equipment often lacks dry-pump protection and overflow warning mechanisms.

[0004] Traditional gastric lavage machines typically only provide preliminary heating to the lavage fluid in the reservoir. However, during actual lavage, the fluid needs to flow through a long external tubing to reach the patient's stomach. Significant heat loss occurs during this process, resulting in the fluid entering the stomach being colder than intended. This cold fluid stimulation can easily trigger gastrointestinal spasms, severe chills, or a rapid pulse, not only exacerbating the patient's suffering but also potentially inducing other cardiovascular complications and hindering the successful execution of emergency treatment.

[0005] Existing gastric lavage machines mostly use single-tube or ordinary double-lumen tubes. Under negative pressure suction, the tube walls are prone to collapse or cave in, leading to interruption of suction. Furthermore, solid impurities in the aspirated material (such as food residue and drug fragments) can easily enter the tubing or pump, causing blockages. Additionally, in emergency situations, some poisoned patients are often unconscious or agitated, making them prone to biting down on the gastric tube. This not only interrupts fluid intake and drainage but may also obstruct the patient's airway, posing a risk of suffocation. Moreover, existing gastric tubes are often secured with ordinary medical tape, which can easily become dislodged or displaced during patient struggles or movement. The clean lavage fluid tank and the wastewater storage tank in existing gastric lavage machines are often located in the same tank or too close together, leading to a high risk of cross-infection due to the mixing of clean and contaminated fluids, and hindering thorough cleaning and disinfection afterward. Summary of the Invention

[0006] In view of the above-mentioned shortcomings in the prior art, the present invention provides a gastric lavage device for emergency internal medicine, which solves the problems of existing emergency internal medicine gastric lavage devices in terms of safety, temperature control accuracy, tubing stability and anti-bite and anti-detachment.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: a gastric lavage device for emergency internal medicine, comprising a base, a main control box disposed on the base, a gastric lavage fluid supply module, a negative pressure suction module, and a double-lumen gastric tube; the main control box is provided with a temperature control module and a display panel;

[0008] The gastric lavage fluid supply module includes a gastric lavage fluid container and an inlet pump located in the main control box. The inlet of the inlet pump is connected to the gastric lavage fluid container. The negative pressure suction module includes a waste storage tank and a negative pressure suction pump located in the main control box. The outlet of the negative pressure suction pump is connected to the waste storage tank. The dual-lumen gastric tube includes an inner tube and an outer tube arranged coaxially. The inner tube forms an outlet channel inside, and the annular gap between the inner tube and the outer tube forms an inlet channel. Several flushing side holes are opened around the side wall of the outer tube near the front end. The front end of the inner tube passes through the front end of the outer tube and extends outward. Several suction side holes are opened on the side wall of the extension section of the inner tube. The tail end of the inlet channel is connected to the outlet of the inlet pump through an inlet pipe, and the tail end of the outlet channel is connected to the inlet of the negative pressure suction pump through a suction pipe.

[0009] The outer wall of the external portion of the double-lumen gastric tube is fitted with an anti-bite protective sleeve; a flexible electric heating layer is wrapped along the length of the outer wall of the double-lumen gastric tube, and the flexible electric heating layer is electrically connected to the temperature control module; flow meters are respectively installed on the inlet and aspiration lines, and the flow meters are electrically connected to the display panel.

[0010] Furthermore, the aforementioned gastric lavage device for emergency internal medicine has a main control module in the main control box, an adjustable speed peristaltic pump for the inlet pump, and an adjustable negative pressure diaphragm pump for the negative pressure suction pump. The flow meter, inlet pump, and negative pressure suction pump are all electrically connected to the main control module. A pipeline pressure sensor is also installed at one end of the suction pipeline located at the negative pressure suction pump.

[0011] The main control module is configured to: acquire the inlet flow rate and outlet flow rate in real time through the flow meter, calculate the flow difference, and when the flow difference is greater than the preset safety threshold, reduce the speed of the inlet pump or increase the negative pressure of the negative pressure suction pump; when the negative pressure value detected by the pipeline pressure sensor is lower than the preset negative pressure safety threshold, control the negative pressure suction pump to stop working.

[0012] Furthermore, in the aforementioned gastric lavage device for emergency internal medicine, several integrally formed support ribs are provided axially between the outer wall of the inner tube and the inner wall of the outer tube to maintain the stability of the annular cross-section of the inlet channel.

[0013] Furthermore, the aforementioned gastric lavage device for emergency internal medicine includes an anti-bite tube protective sleeve comprising an oral support frame, a soft silicone occlusal pad, a gastric tube opening, and an anti-dislodgement clip; the soft silicone occlusal pad is located on the outside of the oral support frame, the gastric tube opening is located at the geometric center of the oral support frame, and the anti-dislodgement clip is located at the edge of the gastric tube opening; the oral support frame is a hollow ring structure made of medical rigid polypropylene to ensure oral ventilation gap.

[0014] Furthermore, the aforementioned gastric lavage device for emergency internal medicine includes a flexible electric heating layer comprising a flexible silicone heating sheet that adheres to and wraps around the outer wall of a double-lumen gastric tube, and an electric heating wire that is spirally embedded inside the flexible silicone heating sheet; the flexible electric heating layer is also wrapped with a heat insulation layer, which is an aerogel felt layer.

[0015] Furthermore, in the aforementioned gastric lavage device for emergency internal medicine, a temperature sensor is embedded inside the flexible silicone heating pad near the side of the double-lumen gastric tube. The temperature sensor is electrically connected to the temperature control module to form a closed-loop temperature control circuit.

[0016] Furthermore, the aforementioned gastric lavage device for emergency internal medicine has an injection port with a sealed cap on the upper side wall of the gastric lavage fluid container, a drain port with a sealed valve on the side wall of the sludge storage tank, and a filter basket for filtering solid impurities inside the sludge storage tank.

[0017] Furthermore, the aforementioned gastric lavage device for emergency internal medicine includes a main control box with a stainless steel frame. The frame has a longitudinally extending partition that divides the inner cavity of the main control box into a first mounting cavity and a second mounting cavity. The gastric lavage fluid container is located in the first mounting cavity, and the waste container is located in the second mounting cavity. The frame is hinged with maintenance doors corresponding to the positions of the first and second mounting cavities.

[0018] Furthermore, the gastric lavage device for emergency internal medicine described above includes two symmetrically arranged clamping arms. One end of each clamping arm is connected to the gastric tube through hole via an elastic hinge, and the other end is provided with locking teeth that engage with each other. Anti-slip silicone protrusions are provided on the inner sidewall of the clamping arm that contacts the double-lumen gastric tube.

[0019] Furthermore, the gastric lavage device used in the emergency internal medicine department is equipped with level sensors inside the gastric lavage fluid container and the waste storage tank. The level sensors are electrically connected to the main control module, and the display panel has a gastric lavage fluid remaining amount indicator area and a waste storage overflow alarm area.

[0020] The beneficial effects of this invention are as follows: This device constructs a multi-layered safety protection mechanism through the collaborative design of a dual-lumen gastric tube structure, a flexible closed-loop temperature control system, an anti-bite and anti-detachment protective sleeve, and an intelligent main control module.

[0021] This device achieves dynamic flow balance monitoring through a main control module combined with flow meters on the inlet and outlet pipelines. When the real-time calculated flow difference exceeds a preset safety threshold, the main control module automatically adjusts the adjustable-speed inlet pump and the adjustable negative-pressure diaphragm pump to effectively prevent bloating or vomiting caused by gastric fluid retention. Simultaneously, the pipeline pressure sensor on the suction line immediately stops the negative-pressure suction pump when it detects that the negative pressure is below a preset threshold, fundamentally avoiding the risk of gastric mucosal injury due to excessive negative pressure. Combined with level sensors in the gastric lavage fluid container and the wastewater storage tank, and an alarm display area on the panel, it eliminates the possibility of dry suction and wastewater overflow.

[0022] The device employs coaxially arranged inner and outer pipes to form independent inlet and outlet channels, with integrally molded support ribs spaced axially between them. This structure effectively maintains the stability of the annular cross-section of the inlet channel under negative pressure suction conditions, preventing pipe wall collapse or cavitation. Furthermore, the filter basket inside the sludge storage tank effectively intercepts solid impurities in the suctioned material, reducing the probability of blockages in the pipeline and pump body.

[0023] Regarding the temperature management of the gastric lavage fluid, this device employs a flexible silicone heating pad with an embedded spiral heating wire wrapped around the outer wall of the double-lumen gastric tube. A temperature sensor is also integrated into the heating pad near the tube wall, forming a closed-loop temperature control circuit with the temperature control module. This allows for precise temperature regulation of the lavage fluid within the tube, preventing gastrointestinal spasms or chills caused by cold liquid stimulation. Outside this heating layer, the device is further wrapped with an aerogel felt insulation layer, whose extremely low thermal conductivity significantly reduces heat loss to the environment. This combination of closed-loop precise temperature control and efficient insulation effectively reduces the overall energy consumption of the device while maintaining a constant temperature.

[0024] The device features an anti-biting sleeve over the external portion of the double-lumen gastric tube. A perforated annular oral support frame made of medical-grade rigid polypropylene provides ample anti-biting strength, preventing the gastric tube from collapsing and disrupting fluid intake and drainage. Its perforated design also ensures adequate airflow in the patient's mouth, effectively preventing the risk of suffocation. Simultaneously, an anti-dislodgement clip is installed at the edge of the gastric tube opening. Through the cooperation of a flexible hinge, locking teeth, and internal anti-slip silicone protrusions, the gastric tube is securely held, preventing accidental displacement or dislodgement during treatment and enhancing the device's applicability to emergency patients in various conditions. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the device;

[0026] Figure 2 This is a schematic diagram of the structure of the anti-bite tube protective sleeve;

[0027] Figure 3 A schematic diagram showing the connection structure between the anti-bite tube protective sleeve and the double-lumen gastric tube;

[0028] Figure 4 This is a schematic diagram of a double-lumen gastric tube.

[0029] Figure 5 This is a schematic diagram of the cross-sectional structure of a double-lumen gastric tube;

[0030] The components include: 1. Base, 2. Main control box, 3. Dual-lumen gastric tube, 4. Display panel, 5. Gastric lavage fluid container, 6. Inlet pump, 7. Sewage tank, 8. Negative pressure suction pump, 9. Inner tube, 10. Outer tube, 11. Outlet channel, 12. Inlet channel, 13. Flushing side hole, 14. Suction side hole, 15. Inlet pipeline, 16. Suction pipeline, 17. Anti-bite tube protective sleeve, 18. Flexible electric heating layer, 19. Flow meter, 20. Pipeline pressure sensor, 21. Support ribs, 22. Oral support skeleton, 23. Soft silicone occlusal pad, 24. Gastric tube through hole, 25. Anti-dislodgement clamp, 26. Temperature sensor, 27. Injection port, 28. Sewage outlet, 29. Box frame, 30. Partition, 31. First mounting cavity, 32. Second mounting cavity, 33. Inspection door. Detailed Implementation

[0031] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0032] like Figures 1-5 As shown, this embodiment provides a gastric lavage device for emergency internal medicine, including a base 1, a main control box 2 mounted on the base 1, a gastric lavage fluid supply module, a negative pressure aspiration module, and a double-lumen gastric tube 3. The main control box 2 is equipped with a temperature control module and a display panel 4. Through the coordinated operation of various modules and components, the device constructs a complete emergency gastric lavage system.

[0033] The main control box 2 includes a stainless steel frame 29. The use of stainless steel ensures the structural strength of the device in an emergency medical environment, as well as its corrosion resistance and ease of sterilization. The frame 29 has a longitudinally extending partition 30 inside. The partition 30 divides the interior of the main control box 2 into two independent mounting cavities: a first mounting cavity 31 and a second mounting cavity 32. This physical separation created by the longitudinally extending partition 30 ensures complete spatial independence between the first and second mounting cavities 31 and 32, achieving physical separation of clean and contaminated areas from a structural layout perspective. Access doors 33 are hinged to the frame 29 at positions corresponding to the first and second mounting cavities 31 and 32, respectively. These hinged access doors 33 allow medical personnel to observe, maintain, clean, and replace components inside the first and second mounting cavities 31 and 32 without disassembling the entire device.

[0034] The gastric lavage fluid supply module includes a gastric lavage fluid container 5 and an inlet pump 6 located within the main control box 2. The gastric lavage fluid container 5 is located within the first mounting cavity 31, and the inlet of the inlet pump 6 is connected to the gastric lavage fluid container 5. In this embodiment, the inlet pump 6 is an adjustable-speed peristaltic pump. The adjustable-speed peristaltic pump allows for precise linear adjustment of the inlet flow rate, while its pumping mechanism does not directly contact the gastric lavage fluid, avoiding secondary contamination. The gastric lavage fluid container 5 has an injection port 27 with a sealing cap on its side wall, and a liquid level sensor is installed inside the gastric lavage fluid container 5.

[0035] The negative pressure suction module includes a sludge storage tank 7 and a negative pressure suction pump 8 located within the main control box 2. The sludge storage tank 7 is located within the second mounting cavity 32, thus spatially isolating it from the gastric lavage fluid container 5 located within the first mounting cavity 31. The outlet of the negative pressure suction pump 8 is connected to the sludge storage tank 7. In this embodiment, the negative pressure suction pump 8 is an adjustable negative pressure diaphragm pump. The adjustable negative pressure diaphragm pump can provide stable and adjustable negative pressure suction power, and the characteristics of the diaphragm pump enable it to run dry, making it less prone to damage during short-term operation without liquid. The side wall of the sludge storage tank 7 is provided with a drain port 28 with a sealing valve. The drain port 28 with a sealing valve facilitates the safe and sealed discharge of the suctioned material from the sludge storage tank 7 for processing after the gastric lavage operation. The interior of the sludge storage tank 7 is provided with a filter basket for filtering solid impurities. The filter basket is designed to physically intercept suction materials containing solid impurities (such as food scraps, drug fragments, etc.) before they enter the main space of the sludge storage tank 7, preventing solid impurities from accumulating at the bottom of the sludge storage tank 7 or clogging the drain outlet 28. In addition, liquid level sensors are installed inside the sludge storage tank 7.

[0036] The double-lumen gastric tube 3 includes an inner tube 9 and an outer tube 10 arranged coaxially. The coaxial arrangement ensures the symmetry of the tube structure and the uniformity of force distribution. An outlet channel 11 is formed inside the inner tube 9. An annular gap between the inner tube 9 and the outer tube 10 forms an inlet channel 12. Through the inner tube 9 and the annular gap, physical isolation between the inlet and outlet channels is achieved within the same gastric tube. Several rinsing side holes 13 are circumferentially formed on the side wall of the outer tube 10 near its front end. These circumferential rinsing side holes 13 allow the lavage fluid to diffuse and rinse in a 360-degree annular pattern upon entering the stomach, improving the coverage area and cleaning efficiency of the lavage. The front end of the inner tube 9 passes through the front end of the outer tube 10 and extends outwards, forming an extension section. Several suction side holes 14 are formed on the side wall of the extension section of the inner tube 9. By designing the front end of the inner tube 9 to extend outward, the suction side hole 14 is positioned deeper into the liquid environment of the stomach, avoiding suction dead zones caused by obstruction at the front end of the outer tube 10.

[0037] Regarding pipeline connections, the end of the inlet channel 12 is connected to the outlet of the inlet pump 6 via the inlet pipe 15. The end of the outlet channel 11 is connected to the inlet of the negative pressure suction pump 8 via the suction pipe 16. Through the above pipeline connections, the gastric lavage fluid supply module, the negative pressure suction module, and the double-lumen gastric tube 3 form a complete fluid circulation loop. To maintain the structural stability of the double-lumen gastric tube 3 under negative pressure suction conditions, several integrally formed support ribs 21 are provided axially between the outer wall of the inner tube 9 and the inner wall of the outer tube 10. The integrally formed support ribs 21 reliably connect the inner tube 9 and the outer tube 10 in the radial and circumferential directions to maintain the stability of the annular cross-section of the inlet channel 12. When negative pressure is generated in the outlet channel 11, the support ribs 21 can effectively resist the tendency of the tube wall to collapse inward or be sucked in, ensuring that the flow channel cross-sectional area of ​​the inlet channel 12 remains constant.

[0038] A protective sleeve 17 is fitted over the outer wall of the external portion of the double-lumen gastric tube 3. The protective sleeve 17 includes an oral support frame 22, a soft silicone occlusal pad 23, a gastric tube opening 24, and an anti-dislodgement clip 25. The oral support frame 22 is a perforated annular structure made of medical-grade rigid polypropylene. The medical-grade rigid polypropylene material gives the oral support frame 22 extremely high compressive strength, enabling it to withstand the biting force of a patient who is unconscious or agitated without deformation. Simultaneously, its perforated annular structure ensures adequate airflow in the oral cavity, allowing air to enter and exit through the perforated area even when the patient bites the protective sleeve, effectively preventing the risk of suffocation. The soft silicone occlusal pad 23 is located on the outer side of the oral support frame 22. The soft silicone occlusal pad 23 provides biocompatibility and comfort when in contact with the patient's teeth and oral mucosa, avoiding damage caused by direct contact between the rigid frame and oral tissues. The gastric tube opening 24 is located at the geometric center of the oral support frame 22. The gastric tube through-hole 24, positioned at the geometric center, ensures that the double-lumen gastric tube 3 remains centered in the patient's mouth when passing through the anti-bite protective sleeve 17, resulting in the most balanced force distribution. The anti-dislodgement clip 25 is located at the edge of the gastric tube through-hole 24.

[0039] The anti-dislodgement clip 25 includes two symmetrically arranged clamping arms, one end of which is connected to the gastric tube through-hole 24 via an elastic hinge. The elastic hinge provides an elastic deflection force for the clamping arms to automatically reset. The other ends of the two clamping arms are provided with interlocking locking teeth. When the two clamping arms are pressed to fit into the double-lumen gastric tube 3, releasing the clamping arms causes them to close under the action of the elastic hinge and achieve interlocking positioning through the locking teeth. The inner wall of the clamping arms in contact with the double-lumen gastric tube 3 is provided with anti-slip silicone protrusions. The anti-slip silicone protrusions increase the frictional resistance between the inner wall of the clamping arms and the outer wall of the double-lumen gastric tube 3, ensuring that the anti-dislodgement clip 25 can firmly hold the double-lumen gastric tube 3 when subjected to external traction, preventing accidental displacement or dislodgement during treatment.

[0040] In terms of temperature control, a flexible electric heating layer 18 is wrapped around the outer wall of the double-lumen gastric tube 3 along its length. The flexible electric heating layer 18 is electrically connected to the temperature control module. The flexible electric heating layer 18 includes a flexible silicone heating sheet that adheres to and wraps around the outer wall of the double-lumen gastric tube 3, and an electric heating wire that is spirally embedded inside the flexible silicone heating sheet. The flexible silicone heating sheet has excellent flexibility and thermal conductivity, and can closely conform to the curved surface of the outer wall of the double-lumen gastric tube 3; the spirally embedded electric heating wire ensures the uniformity of heating along the length of the double-lumen gastric tube 3, avoiding the generation of local overheating or heating blind spots. The flexible electric heating layer 18 is also wrapped with a heat insulation layer, which is an aerogel felt layer. The aerogel felt layer has an extremely low thermal conductivity. Wrapped around the flexible electric heating layer 18, it can block the heat generated by the electric heating wire from dissipating to the external environment to the greatest extent, concentrating the heat energy inside the double-lumen gastric tube 3 to heat the gastric lavage fluid, thereby significantly reducing heating energy consumption and maintaining a stable tube temperature. A temperature sensor 26 is embedded inside the flexible silicone heating pad near the side of the double-lumen gastric tube 3. This temperature sensor 26 can directly and quickly sense the actual temperature of the tube wall. The temperature sensor 26 is electrically connected to the temperature control module to form a closed-loop temperature control circuit. Under the operation of the closed-loop temperature control circuit, the temperature sensor 26 feeds back the real-time tube wall temperature signal to the temperature control module. The temperature control module dynamically adjusts the output power of the flexible electric heating layer 18 based on the deviation between the set temperature and the actual temperature, achieving precise, closed-loop control of the gastric lavage fluid temperature.

[0041] Flow meters 19 are installed on the inlet line 15 and the suction line 16, respectively, and are electrically connected to the display panel 4. The flow meters 19 can monitor the inlet flow rate in the inlet line 15 and the outlet flow rate in the suction line 16 in real time, and display the data intuitively on the display panel 4, allowing medical staff to monitor the dynamic data of gastric lavage fluid intake and output at any time. A line pressure sensor 20 is also installed on the suction line 16 at one end of the negative pressure suction pump 8. The line pressure sensor 20 is located near the negative pressure suction pump 8 and can accurately monitor the real-time negative pressure value in the suction line 16. The main control box 2 contains a main control module. The flow meters 19, the inlet pump 6, and the negative pressure suction pump 8 are all electrically connected to the main control module. Liquid level sensors are installed inside the gastric lavage fluid container 5 and the waste storage tank 7, respectively, and are electrically connected to the main control module. The display panel 4 has a gastric lavage fluid remaining level indicator area and a waste storage overflow alarm area. The liquid level sensors monitor the liquid level of the gastric lavage fluid in the gastric lavage fluid container 5 and the liquid level of the waste in the waste storage tank 7 in real time, and transmit the signals to the main control module. The main control module provides status prompts or alarms through the gastric lavage fluid remaining amount prompt area and the waste overflow alarm prompt area on the display panel 4.

[0042] The main control module is configured to execute the following control strategies:

[0043] First, the main control module acquires the influent flow rate and effluent flow rate in real time through the flow meter 19, and calculates the flow difference (i.e., the influent flow rate minus the effluent flow rate). When the flow difference exceeds the preset safety threshold, it indicates that there may be fluid retention in the stomach due to poor effluent flow or excessively rapid influent flow. At this time, the main control module issues a control command to reduce the speed of the influent pump 6 or increase the negative pressure of the negative pressure suction pump 8, thereby restoring the dynamic balance of fluid inflow and outflow in the stomach by reducing the injection volume or increasing the suction volume.

[0044] Second, when the negative pressure value detected by the pipeline pressure sensor 20 is lower than the preset negative pressure safety threshold (i.e., the absolute value of the negative pressure is too large), it indicates that the pipeline or stomach may be blocked, and continued suction can easily lead to gastric mucosal injury. At this time, the main control module immediately issues a control command to stop the negative pressure suction pump 8 from working, realizing physical-level safety protection against dry suction and excessive negative pressure.

[0045] This embodiment achieves dynamic balance monitoring of flow rate through the main control module combined with the flow meter 19 on the inlet and outlet pipelines. When the flow rate difference exceeds the preset safety threshold, the adjustable speed peristaltic pump and the adjustable negative pressure diaphragm pump are automatically adjusted to effectively prevent gastric fluid retention. At the same time, the pipeline pressure sensor 20 immediately controls the negative pressure suction pump 8 to stop working when it detects that the negative pressure is lower than the preset negative pressure safety threshold, avoiding the risk of gastric mucosal injury due to excessive negative pressure. In conjunction with the liquid level sensor and the prompt and alarm areas on the display panel 4, dry pumping and sewage overflow are eliminated. In this embodiment, the inner tube 9 and the outer tube 10 are coaxially arranged to form independent inlet channel 12 and outlet channel 11, and an integrally formed support rib 21 is set between them. Under negative pressure suction conditions, the annular cross-section of the inlet channel 12 is effectively maintained to prevent the pipe wall from collapsing or sinking. The filter basket set inside the sludge tank 7 effectively intercepts solid impurities, reducing the probability of pipeline and pump blockage. In terms of temperature management, a flexible silicone heating pad with a built-in spiral heating wire is wrapped around the outer wall of the double-lumen gastric tube 3, and a temperature sensor 26 is embedded close to the tube wall. Together with the temperature control module, they form a closed-loop temperature control circuit, which realizes precise adjustment of the temperature of the gastric lavage fluid in the tube and avoids gastrointestinal spasms or chills caused by cold liquid stimulation. The external aerogel felt insulation layer greatly reduces heat loss, effectively reducing the overall energy consumption of the device while ensuring constant temperature. In this embodiment, an anti-biting tube protective sleeve 17 is fitted over the external part of the double-lumen gastric tube 3. The hollowed-out annular oral support skeleton 22 made of medical rigid polypropylene provides sufficient anti-biting strength to prevent the gastric tube from being bitten and collapsing, which would interrupt the inflow and outflow of fluids. Its hollowed-out characteristics also ensure the airway in the patient's oral cavity, preventing the risk of suffocation. The edge of the gastric tube through hole 24 is equipped with an anti-dislodgement clip 25. Through the cooperation of the elastic hinge, locking teeth and the inner anti-slip silicone protrusion, the gastric tube is stably clamped, avoiding accidental displacement or dislodgement during treatment. This enhances the applicability and safety of the device for emergency patients in different conditions.

Claims

1. A gastric lavage device for use in emergency internal medicine, characterized in that, It includes a base (1), a main control box (2) mounted on the base (1), a gastric lavage fluid supply module, a negative pressure suction module, and a double-lumen gastric tube (3); the main control box (2) is equipped with a temperature control module and a display panel (4); The gastric lavage fluid supply module includes a gastric lavage fluid container (5) and an inlet pump (6) located in the main control box (2), with the inlet of the inlet pump (6) connected to the gastric lavage fluid container (5); the negative pressure suction module includes a sludge storage tank (7) and a negative pressure suction pump (8) located in the main control box (2), with the outlet of the negative pressure suction pump (8) connected to the sludge storage tank (7); the double-lumen gastric tube (3) includes an inner tube (9) and an outer tube (10) arranged coaxially, with an outlet channel (11) formed inside the inner tube (9), and the inner tube (9) and the outer tube... (10) The annular gap between them forms an inlet channel (12); several flushing side holes (13) are opened around the side wall of the outer tube (10) near the front end; the front end of the inner tube (9) passes through the front end of the outer tube (10) and extends outward, and several suction side holes (14) are opened on the side wall of the extension section of the inner tube (9); the tail end of the inlet channel (12) is connected to the outlet of the inlet pump (6) through the inlet pipe (15), and the tail end of the outlet channel (11) is connected to the inlet of the negative pressure suction pump (8) through the suction pipe (16); The outer wall of the external portion of the double-lumen gastric tube (3) is fitted with an anti-bite tube protective sleeve (17); the outer wall of the double-lumen gastric tube (3) is covered with a flexible electric heating layer (18) along its length, and the flexible electric heating layer (18) is electrically connected to the temperature control module; the inlet pipe (15) and the suction pipe (16) are respectively equipped with flow meters (19), and the flow meters (19) are electrically connected to the display panel (4).

2. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, The main control box (2) is equipped with a main control module. The inlet pump (6) is an adjustable speed peristaltic pump, and the negative pressure suction pump (8) is an adjustable negative pressure diaphragm pump. The flow meter (19), the inlet pump (6) and the negative pressure suction pump (8) are all electrically connected to the main control module. A pipeline pressure sensor (20) is also provided at one end of the suction pipeline (16) located at the negative pressure suction pump (8). The main control module is configured to: obtain the inlet flow rate and outlet flow rate in real time through the flow meter (19), calculate the flow difference, and when the flow difference is greater than the preset safety threshold, reduce the speed of the inlet pump (6) or increase the negative pressure of the negative pressure suction pump (8); when the negative pressure value detected by the pipeline pressure sensor (20) is lower than the preset negative pressure safety threshold, control the negative pressure suction pump (8) to stop working.

3. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, A number of integrally formed support ribs (21) are provided axially between the outer wall of the inner tube (9) and the inner wall of the outer tube (10) to maintain the stability of the annular cross section of the liquid inlet channel (12).

4. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, The anti-bite tube protective sleeve (17) includes an oral support frame (22), a soft silicone bite pad (23), a gastric tube opening (24), and an anti-dislodgement clip (25); the soft silicone bite pad (23) is located on the outside of the oral support frame (22), the gastric tube opening (24) is located at the geometric center of the oral support frame (22), and the anti-dislodgement clip (25) is located at the edge of the gastric tube opening (24); the oral support frame (22) is a hollow ring structure made of medical rigid polypropylene material to ensure oral ventilation gap.

5. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, The flexible electric heating layer (18) includes a flexible silicone heating sheet that fits and wraps around the outer wall of the double-lumen gastric tube (3), and an electric heating wire that is spirally embedded inside the flexible silicone heating sheet; the flexible electric heating layer (18) is also wrapped with a heat insulation layer, which is an aerogel felt layer.

6. The gastric lavage device for emergency internal medicine according to claim 5, characterized in that, A temperature sensor (26) is embedded inside the flexible silicone heating pad on the side near the double-lumen gastric tube (3). The temperature sensor (26) is electrically connected to the temperature control module to form a closed-loop temperature control circuit.

7. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, The gastric lavage fluid container (5) has an injection port (27) with a sealed cap on the upper side wall, and the sludge storage tank (7) has a drain port (28) with a sealed valve on the side wall. The sludge storage tank (7) has a filter basket for filtering solid impurities inside.

8. The gastric lavage device for emergency internal medicine according to claim 1, characterized in that, The main control box (2) includes a stainless steel box frame (29). The box frame (29) has a longitudinally extending partition (30) inside. The partition (30) divides the inner cavity of the main control box (2) into a first installation cavity (31) and a second installation cavity (32) that are independent of each other. The gastric lavage fluid container (5) is located in the first installation cavity (31), and the sludge storage tank (7) is located in the second installation cavity (32). The box frame (29) is hinged with maintenance doors (33) at the positions corresponding to the first installation cavity (31) and the second installation cavity (32).

9. The gastric lavage device for emergency internal medicine according to claim 4, characterized in that, The anti-detachment clip (25) includes two symmetrically arranged clamping arms. One end of the two clamping arms is connected to the gastric tube through hole (24) through an elastic hinge, and the other end is provided with locking teeth that engage with each other. The inner sidewall of the clamping arm that contacts the double-lumen gastric tube (3) is provided with anti-slip silicone protrusions.

10. The gastric lavage device for emergency internal medicine according to claim 2, characterized in that, The gastric lavage fluid container (5) and the sludge storage tank (7) are respectively equipped with liquid level sensors. The liquid level sensors are electrically connected to the main control module. The display panel (4) is equipped with a gastric lavage fluid remaining amount indicator area and a sludge storage overflow alarm indicator area.

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