A negative pressure cleaning device for respiratory secretions in children

Abstract

The application discloses a kind of children respiratory tract secretion negative pressure cleaning equipment, comprising: cleaning device and medicament adding device.Cleaning device includes secretion suction pipe, secretion collection tank and negative pressure generator, one end of secretion suction pipe is equipped with suction head, a plurality of suction holes are opened in the lateral wall of suction head, a plurality of suction holes are spaced distribution along the circumference of suction head, the tail end of secretion suction pipe is connected with the inlet of secretion collection tank, the outlet of secretion collection tank is connected with the inlet of negative pressure generator;Medicament adding device includes medicament injection pipe and liquid storage tank, one end of medicament injection pipe is communicated with liquid storage tank.A plurality of suction holes effectively expand the coverage of single suction, significantly reduce the risk of a single suction hole being completely blocked, ensure the continuity of suction process, while avoiding potential damage to respiratory mucosa by pressure fluctuation.By the way of lubricating mucosa, diluting viscous secretion, thereby reducing suction resistance and improving the tolerance of sick children.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a negative pressure cleanup device for children's respiratory secretions. Background Technology

[0002] A pediatric airway secretion negative pressure suction device is a medical device that uses negative pressure suction to remove sputum and secretions from the respiratory tract through the nasal cavity or mouth to maintain airway patency. During clinical operation, the appropriate suction catheter must be selected according to the child's age, and the negative pressure value must be precisely controlled to effectively remove secretions and minimize the risk of mucosal damage.

[0003] Significant discomfort can occur during the procedure due to the mechanical stimulation of the airway mucosa by the suction catheter, the pharyngeal reflex triggered by the insertion depth exceeding physiological tolerance, and the traction effect on local tissues caused by increased negative pressure when the sputum is too viscous. This discomfort can trigger a defensive struggling response in the child, and the positional movement during the struggling process can exacerbate the friction between the catheter and the mucosa, ultimately increasing the risk of airway mucosal damage. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a negative pressure cleaning device for children's respiratory secretions, which reduces the discomfort of the respiratory secretion cleaning process.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A negative pressure cleanup device for pediatric respiratory secretions includes:

[0007] A cleaning device includes a secretion suction tube, a secretion collection container, and a negative pressure generator. One end of the secretion suction tube is provided with a suction head, and the side wall of the suction head has multiple suction holes that are spaced apart circumferentially along the suction head. The inlet of the secretion collection container is connected to the tail end of the secretion suction tube, and the outlet of the secretion collection container is connected to the inlet of the negative pressure generator. The negative pressure generator is used to maintain a negative pressure state inside the secretion collection container. The suction holes, the secretion suction tube, the secretion collection container, and the negative pressure generator are connected sequentially along the gas flow direction.

[0008] A drug dispensing device includes a drug injection tube and a reservoir. One end of the drug injection tube is connected to the reservoir, and the other end is provided with a drug delivery part for approaching or extending into the respiratory tract, so that the drug solution in the reservoir acts on the respiratory tract.

[0009] Furthermore, the secretion suction tube is sleeved outside the drug injection tube, and the gas flow direction of the secretion suction tube is opposite to the liquid flow direction of the drug injection tube.

[0010] Furthermore, the output end of the drug injection tube is provided with a flow guiding structure, which is used to deflect the liquid flow direction output by the drug injection tube to be consistent with the gas flow direction.

[0011] Furthermore, a support is provided between the secretion aspiration tube and the drug injection tube, the support being used to maintain a gap between the secretion aspiration tube and the drug injection tube.

[0012] Furthermore, the secretion suction tube is provided with a baffle to prevent the secretion suction tube from being inserted into the respiratory tract, and the baffle is located between the suction head and the tail end of the secretion suction tube.

[0013] Furthermore, the cross-section of the baffle is a rounded rectangle.

[0014] Furthermore, the secretion collection container is equipped with a pressure control valve, which is used to open when the pressure difference between the inside and outside of the secretion collection container exceeds a preset safety threshold.

[0015] Furthermore, the side wall of the secretion collection container is connected to an overflow pipe, which is equipped with a one-way valve that allows the secretion collection container to flow to the external environment. The overflow pipe is connected to the external environment, and the horizontal height of the overflow pipe inlet is lower than the horizontal height of the secretion suction tube.

[0016] Furthermore, a filtration and disinfection device is provided between the secretion collection tank and the negative pressure generator. The filtration and disinfection device includes a washing tank and a drying tank. The secretion collection tank and the washing tank are connected by a first air guide pipe, and the washing tank and the drying tank are connected by a second air guide pipe. The outlet of the first air guide pipe is located at the bottom of the washing tank. The washing tank is used to contain disinfectant liquid, and the drying tank is used to contain desiccant. The secretion collection tank, the first air guide pipe, the washing tank, the second air guide pipe, the drying tank, and the negative pressure generator are connected sequentially along the airflow direction.

[0017] Furthermore, the drug injection tube is equipped with a metering control valve, which is used to control the opening and closing of the drug injection tube.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The suction tube has a suction head at one end, and the sidewall of the suction head has multiple suction holes that are spaced apart circumferentially along the suction head. The circumferentially multi-hole suction head at the end of the suction tube can form a uniformly distributed negative pressure field. This structural design effectively expands the coverage area of ​​a single suction, and at the same time, the multi-hole diversion mechanism significantly reduces the risk of a single suction hole being completely blocked, ensuring the continuity of the suction process.

[0020] 2. The inlet of the secretion collection container is connected to the tail end of the secretion suction tube, and the outlet of the secretion collection container is connected to the inlet of the negative pressure generator. The negative pressure generator is used to maintain a negative pressure state inside the secretion collection container. The suction port, the secretion suction tube, the secretion collection container, and the negative pressure generator are sequentially connected along the gas flow direction. Through this series arrangement and the sequential connection of each component along the gas flow direction, a complete and sealed airflow path is established. This system can establish and maintain a stable negative pressure environment inside the secretion collection container, ensuring that secretions are smoothly and continuously drawn into the collection container, while avoiding potential damage to the respiratory mucosa caused by pressure fluctuations.

[0021] 3. The medication infusion tube is connected at one end to the reservoir, and at the other end is a delivery point for approaching or extending into the respiratory tract, allowing the medication in the reservoir to act on the respiratory tract. The medication infusion tube enables precise delivery of the medication from the reservoir to the target site in the respiratory tract. This design allows the medication to act on the respiratory tract beforehand, lubricating the mucous membranes and diluting viscous secretions, creating favorable conditions for subsequent negative pressure suction, thereby reducing suction resistance and improving the child's tolerance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the negative pressure cleanup device for children's respiratory secretions according to the present invention;

[0023] Figure 2 for Figure 1 The sectional view shown;

[0024] Figure 3 for Figure 2 The diagram shows the fluid flow direction.

[0025] In the diagram: 1. Secretion suction tube; 2. Secretion collection tank; 3. Suction head; 4. Suction hole; 5. Drug injection tube; 6. Storage tank; 7. Flow guiding structure; 8. Support component; 9. Baffle; 10. Pressure control valve; 11. Overflow pipe; 12. Gas washing tank; 13. Drying tank; 14. First gas guide tube; 15. Second gas guide tube; 16. Metering control valve. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] See Figures 1-3 A preferred embodiment of the present invention provides a negative pressure cleaning device for children's respiratory secretions, comprising: a cleaning device and a drug addition device.

[0030] The cleaning device includes a secretion suction tube 1, a secretion collection container 2, and a negative pressure generator. One end of the secretion suction tube 1 is equipped with a suction head 3, and the sidewall of the suction head 3 has multiple suction holes 4 spaced apart circumferentially. The inlet of the secretion collection container 2 is connected to the tail end of the secretion suction tube 1, and the outlet of the secretion collection container 2 is connected to the inlet of the negative pressure generator. The negative pressure generator is used to maintain a negative pressure state inside the secretion collection container 2. The suction holes 4, the secretion suction tube 1, the secretion collection container 2, and the negative pressure generator are sequentially connected along the gas flow direction. The cleaning end of the secretion suction tube 1 is equipped with a suction head 3, and its sidewall has multiple suction holes 4 evenly distributed circumferentially. This porous annular distribution design can form a uniform negative pressure field, effectively expanding the suction area and preventing complete blockage of a single hole, while significantly reducing the risk of excessive adsorption of mucosal tissue. The secretion collection container 2 is sealed to the end of the secretion suction tube 1 via its inlet, and its outlet is connected to the inlet of the negative pressure generator, forming a completely closed airflow path. When the negative pressure generator is activated, it establishes and maintains a stable negative pressure environment within the secretion collection container 2. This negative pressure is transmitted to the suction head 3 via a connecting pipe, allowing respiratory secretions to flow smoothly and continuously through the suction hole 4 and the secretion suction tube 1 into the secretion collection container 2. This system design not only achieves efficient collection of secretions and reliable isolation of the airflow path, but also avoids potential damage to the respiratory mucosa caused by pressure fluctuations through stable negative pressure control. It is understood that, as an alternative implementation, the collection container can be designed to be transparent, providing medical personnel with a real-time observation window to accurately assess the characteristics and volume of secretions, providing important reference information for clinical diagnosis.

[0031] The medication delivery device includes a medication injection tube 5 and a reservoir 6. One end of the medication injection tube 5 is connected to the reservoir 6, and the other end has a delivery point for approaching or extending into the respiratory tract, so that the medication in the reservoir 6 acts on the respiratory tract. One end of the medication injection tube 5 remains connected to the reservoir 6, while the delivery point at the other end can precisely approach or securely extend into a specific area of ​​the respiratory tract. This design achieves directional delivery of the medication from the reservoir 6 to the target site, and its sealed connection structure ensures hygienic safety and stable flow during the medication delivery process. The appropriate temperature and humidity medication or a special mucosal protectant delivered through the delivery point effectively lubricates the respiratory mucosa, significantly reducing mechanical irritation during subsequent suctioning. Simultaneously, specific drug components can quickly dilute viscous secretions, reducing tissue traction during suctioning, thereby directly alleviating the child's physiological discomfort and anxiety. This device works in coordination with the cleaning device to intervene with medication before negative pressure suction. It reduces suction resistance and the risk of mucosal damage through the lubrication, anti-inflammatory or dilution effects of the medication, and improves the child's cooperation by reducing discomfort during operation, providing a safe and comfortable route of administration for the treatment of respiratory diseases.

[0032] Working principle: The medication addition device first delivers the medication from the storage tank 6 to the respiratory tract through the medication dispensing section. The medication lubricates the mucous membrane surface and dilutes viscous secretions, creating favorable conditions for subsequent cleaning operations. Then, the cleaning device starts working. The negative pressure generator establishes a stable negative pressure in the secretion collection tank 2, which is transmitted to the suction head 3 through the connecting pipe. A uniform negative pressure field is formed around the porous annular suction holes 4, allowing the pre-treated secretions to smoothly enter the suction pipeline system and ultimately be collected in the secretion collection tank 2.

[0033] Clearly, the circumferentially porous suction head 3 at the end of the secretion suction tube 1 can form a uniformly distributed negative pressure field. This structural design effectively expands the coverage area of ​​a single suction, while the porous diversion mechanism significantly reduces the risk of complete blockage of a single suction hole 4, ensuring the continuity of the suction process. Through a series arrangement and the sequential connection of each component along the gas flow direction, a complete and sealed airflow path is established. This system can establish and maintain a stable negative pressure environment within the secretion collection container 2, ensuring that secretions are smoothly and continuously aspirated into the collection container, while avoiding potential damage to the respiratory mucosa from pressure fluctuations. The medication infusion tube 5 enables precise delivery of medication from the reservoir to the target site in the respiratory tract. This design allows the medication to act on the respiratory tract beforehand, lubricating the mucosa and diluting viscous secretions, creating favorable conditions for subsequent negative pressure suction operations, thereby reducing suction resistance and improving the child's tolerance.

[0034] In this embodiment, preferably, the secretion aspiration tube 1 is sleeved on the outside of the drug injection tube 5, and the gas flow direction of the secretion aspiration tube 1 is opposite to the liquid flow direction of the drug injection tube 5. When the secretion aspiration tube 1 and the drug injection tube 5 are in simultaneous operation mode, the drug injection tube 5 continuously delivers the drug solution to the respiratory tract site of action, while the secretion aspiration tube 1 simultaneously establishes a negative pressure suction environment, realizing parallel operation of drug administration and suction. The counter-flowing drug solution and secretions form efficient convection in the airway, which not only enhances the mixing uniformity of the drug solution and secretions, but also avoids drug accumulation through continuous drainage. When the secretion aspiration tube 1 and the drug injection tube 5 are in stepwise operation mode, that is, the drug solution is first infused through the drug injection tube 5, and then the negative pressure suction function is activated. The first injected drug solution can fully soften and dilute the secretions, creating optimal conditions for subsequent suction. This adjustable working mode allows operators to flexibly choose treatment plans based on the actual clinical situation, ensuring the continuity of the treatment process, improving overall operational efficiency through functional synergy, and ensuring the safety and controllability of the treatment process.

[0035] In this embodiment, preferably, the output end of the drug injection tube 5 is provided with a flow guiding structure 7, which is used to deflect the liquid flow direction output from the drug injection tube 5 to be consistent with the gas flow direction. This unidirectional flow design allows the drug solution to flow along the physiological structure of the respiratory tract after ejection, creating a synergistic effect with negative pressure suction. When the flowing drug solution enters the airway, it first exerts a directional flushing effect on the secretions adhering to the mucosal surface, pre-softening, diluting, or peeling off some of the adhering material. This pre-flushing initially improves the overall viscosity of the secretions and reduces the adhesion between the secretions and the mucosa during subsequent negative pressure suction. When negative pressure suction is activated, the pre-treated secretions are more easily drawn into the suction tube, thus significantly improving clearance efficiency. Furthermore, because the unidirectional flow reduces the resistance of airflow through the secretions, the system can use a relatively low negative pressure value while maintaining the same suction effect. This directly reduces the adsorption pressure on the respiratory mucosa during suction, effectively avoiding the risk of tissue damage. The flow guiding structure 7 achieves coordinated flow of liquid medicine and airflow, which not only ensures the full exertion of the therapeutic effect of the drug, but also optimizes the safety and effectiveness of the overall treatment process through the synergistic effect of physical flushing and low-pressure suction.

[0036] Understandably, as an alternative implementation, the medication infusion tube 5 can deliver saline solution for airway flushing. When saline solution is injected into the respiratory tract at an appropriate flow rate, it establishes a continuous liquid environment within the airway. This pre-established liquid environment ensures that when negative pressure suction is subsequently initiated, the secretion suction tube 1 first comes into contact with the liquid medium rather than lung air. This mechanism effectively reduces the amount of air directly aspirated from the lungs, significantly reducing the suffocating discomfort caused by excessive removal of air from the alveoli. Simultaneously, saline solution itself has a good diluting effect on secretions, and its flushing effect further softens viscous sputum, making subsequent negative pressure suction procedures smoother.

[0037] In this embodiment, preferably, a support member 8 is provided between the secretion aspiration tube 1 and the drug injection tube 5. The support member 8 is used to maintain a gap between the secretion aspiration tube 1 and the drug injection tube 5. By maintaining the annular gap between the two tube walls, the support member 8 ensures that the cross-sectional area of ​​the negative pressure airflow channel remains constant. The constant annular gap ensures the stable flow of negative pressure airflow, avoiding airflow fluctuations caused by tube deformation or pressure, thereby maintaining the stability of the suction effect. Secondly, the equidistant gap formed by the support member 8 allows the drug solution to be evenly distributed throughout the entire annular channel, preventing the drug solution from accumulating in local areas or flowing poorly, ensuring the uniformity of drug delivery. It effectively prevents the two tube walls from sticking or colliding during operation, protecting the integrity of the tube structure and avoiding noise or vibration caused by tube wall contact, thus improving the safety and reliability of equipment operation. This support design, while ensuring the structural stability of the dual-tube system, optimizes the fluid dynamics performance and provides a structural basis for precise control of the treatment process.

[0038] In this embodiment, preferably, the secretion suction tube 1 is equipped with a baffle 9, which is used to prevent the secretion suction tube 1 from being inserted into the airway. The baffle 9 is located between the suction head 3 and the tail end of the secretion suction tube 1. The outer diameter of the baffle 9 has been precisely calculated, and its size is significantly larger than the maximum physiological diameter of the child's oral cavity entrance, completely eliminating the possibility of the baffle 9 entering the oral cavity from a physical structure perspective. When the child suddenly moves their limbs due to fear, the contact surface between the baffle 9 and the facial tissue forms an effective physical limit, fundamentally preventing the catheter from accidentally moving into the deep airway due to external force. Secondly, this mechanical blocking mechanism ensures that the suction head 3 is always operated within a safe anatomical area, ensuring both suction effect and avoiding mucosal damage to sensitive areas such as the pharynx and trachea. At the same time, the stable contact between the baffle 9 and the face provides a reliable support base for the operation process, enabling medical staff to more accurately control the force and direction of operation. The structural design of the limiting baffle 9 takes into account the physiological characteristics and behavioral features of pediatric patients. Through dual protection—controlling the insertion depth and preventing oral cavity entry—it significantly improves the safety of operation when the child's cooperation is insufficient and effectively reduces medical risks.

[0039] In this embodiment, preferably, the cross-section of the baffle 9 is a rounded rectangle. The rounded corner design completely eliminates sharp edges, effectively avoiding scratches or indentations on the child's facial skin during operation. The rectangular outline provides a clear directional reference feature, allowing the operator to visually determine the circumferential orientation of the multiple suction holes 4 of the suction head 3 within the airway by observing the position of the long side of the baffle 9. When performing a professional spiral lifting technique or when multi-angle suction is required, the operator can hold the baffle 9 and operate by intermittent rotation and gradual retraction. The rectangular outline of the baffle 9 precisely controls the angle of each rotation, and with stable negative pressure suction, the circumferentially distributed suction holes 4 can sequentially act on the mucosal surface in different directions. This rotating lifting operation mode avoids mucosal damage caused by continuous single-point suction and ensures thorough removal of secretions through segmented and systematic cleaning. The rounded rectangular baffle design integrates physical safety limits, visual angle guidance, and professional operation support, significantly improving safety, controllability, and operational efficiency in complex pediatric airway clearance scenarios.

[0040] In this embodiment, preferably, the secretion collection container 2 is equipped with a pressure control valve 10, which is used to open when the pressure difference between the inside and outside of the secretion collection container 2 exceeds a preset safety threshold. When the pressure difference between the inside of the secretion collection container 2 and the external environment exceeds the preset safety threshold, the spring mechanism of the pressure control valve 10 is compressed under the action of the pressure difference, driving the valve core to displace, thereby opening the valve to form a pressure relief channel. This automatic pressure regulation mechanism effectively prevents damage to the respiratory mucosa tissue caused by excessive negative pressure by timely pressure relief, and effectively avoids the mucosa being excessively inhaled into the suction hole 4, causing tearing or edema. Secondly, when the suction hole 4 is accidentally completely blocked by the mucosa, the valve provides a reliable backup pressure relief path, ensuring that the system pressure is always maintained within a safe range. The safety pressure threshold of the pressure control valve 10 is precisely calibrated, ensuring both the negative pressure level required for suction efficiency and providing a safety guarantee adapted to the fragile physiological characteristics of the respiratory tracts of various pediatric patients. The pressure control valve 10 works in conjunction with the negative pressure generator to form a complete pressure monitoring and protection system, significantly improving the safety and reliability of the equipment in clinical operation.

[0041] In this embodiment, preferably, an overflow pipe 11 is connected to the side wall of the secretion collection tank 2. The overflow pipe 11 is equipped with a one-way valve that allows the secretion collection tank 2 to flow to the external environment. The overflow pipe 11 is connected to the external environment, and the horizontal height of the inlet of the overflow pipe 11 is lower than the horizontal height of the secretion suction tube 1. When positive pressure is generated inside the system due to an unexpected situation, the one-way valve automatically opens under the action of pressure difference, forming a priority pressure relief channel, allowing gas and liquid to be discharged to the external environment through the overflow pipe 11, thereby effectively preventing the liquid in the secretion collection tank 2 from being conducted to the child's respiratory tract through the secretion suction tube 1. Under negative pressure normal operating conditions, the one-way valve of the overflow pipe 11 can prevent outside air from entering the secretion collection tank 2. When the liquid level in the secretion collection tank 2 exceeds the safe height, the pressure of the liquid level is greater than the negative pressure generated by the air, and the overflow system can promptly discharge excess liquid, maintaining the effective working volume of the system. This anti-backflow design is particularly suitable for the special requirements of pediatric respiratory care. By establishing a reliable pressure relief channel and physical barrier, it fundamentally prevents the risk of cross-infection and respiratory pressure injury, providing important safety assurance for medical procedures.

[0042] In this embodiment, preferably, a filtration and disinfection device is further provided between the secretion collection tank 2 and the negative pressure generator. The filtration and disinfection device includes a washing tank 12 and a drying tank 13. The secretion collection tank 2 and the washing tank 12 are connected by a first air guide pipe 14, and the washing tank 12 and the drying tank 13 are connected by a second air guide pipe 15. The outlet of the first air guide pipe 14 is located at the bottom of the washing tank 12. The washing tank 12 is used to contain disinfectant liquid, and the drying tank 13 is used to contain desiccant. The secretion collection tank 2, the first air guide pipe 14, the washing tank 12, the second air guide pipe 15, the drying tank 13, and the negative pressure generator are sequentially connected along the airflow direction. The outlet of the secretion collection tank 2 is connected to the washing tank 12 through the first air guide pipe 14, and the outlet of the first air guide pipe 14 extends to below the disinfectant liquid level at the bottom of the washing tank 12. The top of the gas scrubbing tank 12 is connected to the inlet of the drying tank 13 via a second air guide pipe 15. The drying tank 13 is filled with desiccant, and its outlet is directly connected to the negative pressure generator. When aerosols carrying pathogenic microorganisms enter the gas scrubbing tank 12 from the collection tank, the airflow disperses through the bottom outlet, forming a large number of tiny bubbles. As the aerosol particles slowly pass through the disinfectant layer, the liquid medium efficiently traps them, while the disinfectant components thoroughly inactivate the pathogens. Subsequently, the disinfected airflow enters the drying tank 13, where the liquid moisture and humidity it carries are deeply adsorbed by the desiccant, ultimately outputting clean and dry gas to the negative pressure generator. This multi-stage purification design ensures the complete inactivation of pathogenic microorganisms, blocking the transmission route of hospital infections, and also protects the internal components of the negative pressure generator through effective dehydration, significantly extending the equipment's service life. Overall, it constitutes a complete and reliable infection control solution.

[0043] In this embodiment, preferably, the drug injection tube 5 is equipped with a metering control valve 16, which is used to control the opening and closing of the drug injection tube 5. The metering control valve 16 achieves reliable opening and closing of the flow channel through the linear displacement of the valve core, allowing the operator to accurately control the timing of drug administration according to the needs of the treatment stage. When the valve is opened, the drug solution is delivered to the target site of the respiratory tract through the pipeline under the drive of gravity or external pressure; closing the valve immediately blocks the flow of the drug solution, preventing ineffective output. This controllable opening and closing mechanism works in coordination with the overall system. Opening the valve before negative pressure suction can achieve airway humidification and secretion dilution, closing the valve during suction can avoid drug waste, and closing the valve during treatment intervals can maintain the system's airtightness. The precise adjustment function of the metering control valve 16 not only ensures the safety and economy of drug delivery, but also ensures the orderly connection between drug treatment and physical suction procedures, thereby optimizing the overall treatment effect and improving the standardization of the operation process.

[0044] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A negative pressure cleanup device for children's respiratory secretions, characterized in that, include: The cleaning device includes a secretion suction tube (1), a secretion collection tank (2), and a negative pressure generator. One end of the secretion suction tube (1) is provided with a suction head (3). The side wall of the suction head (3) is provided with a plurality of suction holes (4). The plurality of suction holes (4) are distributed at intervals along the circumference of the suction head (3). The inlet of the secretion collection tank (2) is connected to the tail end of the secretion suction tube (1). The outlet of the secretion collection tank (2) is connected to the inlet of the negative pressure generator. The negative pressure generator is used to make the secretion collection tank (2) be in a negative pressure state. The suction holes (4), the secretion suction tube (1), the secretion collection tank (2), and the negative pressure generator are connected in sequence along the gas flow direction. The drug addition device includes a drug injection tube (5) and a storage tank (6). One end of the drug injection tube (5) is connected to the storage tank (6), and the other end is provided with a drug delivery part for approaching or extending into the respiratory tract, so that the drug solution in the storage tank (6) acts on the respiratory tract.

2. The negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, The secretion suction tube (1) is sleeved on the outside of the drug injection tube (5), and the gas flow direction of the secretion suction tube (1) is opposite to the liquid flow direction of the drug injection tube (5).

3. The negative pressure cleanup device for pediatric respiratory secretions according to claim 2, characterized in that, The output end of the drug injection tube (5) is provided with a flow guiding structure (7), which is used to deflect the liquid flow direction output by the drug injection tube (5) to be consistent with the gas flow direction.

4. The negative pressure cleanup device for pediatric respiratory secretions according to claim 2, characterized in that, A support (8) is provided between the secretion aspiration tube (1) and the drug injection tube (5), and the support (8) is used to maintain a gap between the secretion aspiration tube (1) and the drug injection tube (5).

5. A negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, The secretion suction tube (1) is provided with a baffle (9), which is used to prevent the secretion suction tube (1) from being inserted into the respiratory tract. The baffle (9) is located between the suction head (3) and the tail end of the secretion suction tube (1).

6. A negative pressure cleanup device for pediatric respiratory secretions according to claim 5, characterized in that, The cross-section of the baffle (9) is a rounded rectangle.

7. A negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, The secretion collection tank (2) is equipped with a pressure control valve (10), which is used to open when the pressure difference between the inside and outside of the secretion collection tank (2) exceeds a preset safety threshold.

8. A negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, The side wall of the secretion collection tank (2) is connected to an overflow pipe (11). The overflow pipe (11) is equipped with a one-way valve that allows the secretion collection tank (2) to flow to the external environment. The overflow pipe (11) is connected to the external environment. The horizontal height of the inlet of the overflow pipe (11) is lower than the horizontal height of the secretion suction tube (1).

9. A negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, A filtration and disinfection device is also provided between the secretion collection tank (2) and the negative pressure generator. The filtration and disinfection device includes a washing tank (12) and a drying tank (13). The secretion collection tank (2) and the washing tank (12) are connected by a first air guide pipe (14). The washing tank (12) and the drying tank (13) are connected by a second air guide pipe (15). The outlet of the first air guide pipe (14) is located at the bottom of the washing tank (12). The washing tank (12) is used to contain disinfectant liquid, and the drying tank (13) is used to contain desiccant. The secretion collection tank (2), the first air guide pipe (14), the washing tank (12), the second air guide pipe (15), the drying tank (13) and the negative pressure generator are connected in sequence along the airflow direction.

10. A negative pressure cleanup device for pediatric respiratory secretions according to claim 1, characterized in that, The drug injection tube (5) is equipped with a metering control valve (16), which is used to control the opening and closing of the drug injection tube (5).

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