Multifunctional oropharyngeal airway tube

Abstract

This invention belongs to the field of ventilation tube technology, specifically referring to a multifunctional oropharyngeal ventilation tube, including a support bite ring. The outer circumferential wall of the support bite ring is wavy, designed to fit and hold the patient's incisors. An endoscope port passes through the support bite ring. A tongue baffle is coaxially fixedly connected to one end of the support bite ring. The tongue baffle is open, and both ends of the open side of the tongue baffle are arc-shaped and curved upwards. A connecting component is fixedly connected to the other end of the support bite ring, and a valve body is fixedly connected to the connecting component. The valve body is hollow. This application utilizes the oral pressure changes generated during the patient's breathing process as the sole power source to drive the movement of the moving plate inside the valve body. This pressure difference causes the moving plate and its sealing structure to rise and fall, automatically switching between the oxygen supply channel and the expiratory sampling channel, achieving precise separation of oxygen supply during inspiration and sampling during expiration.

Description

Technical Field

[0001] This invention belongs to the field of ventilation tube technology, specifically referring to a multifunctional oropharyngeal ventilation tube. Background Technology

[0002] In clinical medicine, especially in procedures such as intensive care, anesthesia, and gastroscopy / colonoscopy, maintaining airway patency, ensuring effective oxygenation and ventilation, and monitoring respiratory status in real time are core aspects of ensuring medical safety. Oropharyngeal airways, as a basic airway management tool, are widely used to prevent tongue retraction and maintain upper airway patency. However, in invasive procedures such as gastroscopy, traditional instruments have limited functionality and struggle to meet the complex airway management needs.

[0003] Traditional oropharyngeal airways or endoscope bites only provide mechanical support or instrument access, lacking integrated life support and monitoring interfaces. When oxygenation or end-tidal carbon dioxide monitoring needs to be performed simultaneously, healthcare professionals must connect and manage multiple independent tubing lines to and from the patient's head and face. Existing oxygen supply and gas monitoring systems typically require solenoid valves to switch valves to control the airway, which cannot synchronize with the instantaneous changes in the patient's spontaneous breathing. This can lead to serious airway disruptions, such as incorrect oxygen delivery during expiration diluting the exhaled gas sample to be tested, or failure to deliver oxygen in time during inspiration. Incorrect switching may even cause abnormal airway pressure in the patient. Exhaled gas will condense when it encounters cold air in the tubing, and combined with secretions in the patient's mouth and airway, it is very easy for condensation to accumulate on the inner wall of the tubing. The accumulation of condensation not only breeds bacteria and increases the risk of infection, but may also block the delicate and narrow monitoring and sampling tubing. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a multifunctional oropharyngeal ventilation tube. This application utilizes the oral pressure changes generated during the patient's own breathing as the core driving force. This pressure difference directly drives a moving plate within the valve body for precise up-and-down switching, achieving automatic switching between the inspiratory oxygenation pathway and the expiratory sampling pathway. This solves the technical problem in existing technologies where the tube cannot synchronize with the instantaneous changes in the patient's spontaneous breathing. By incorporating an impeller and helical blade mechanism driven by respiratory airflow within the oral cavity end connection hole, the function of the respiratory airflow is converted into rotational mechanical energy, continuously scraping the inner wall of the tube. This solves the technical problem in existing technologies where condensate and secretions clog the expiratory tube. Furthermore, an automatic sealing and drainage structure consisting of a floating cone and a sealing ring at the bottom of the liquid storage hole automatically opens when the accumulated liquid reaches a set capacity and automatically closes after emptying, achieving self-cleaning.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present solution proposes a multifunctional oropharyngeal ventilation tube, including a support bite ring, the outer circumferential wall of the support bite ring is wavy, a gastroscopy port is passed through the support bite ring, a tongue baffle is coaxially fixedly connected to one end of the support bite ring, the tongue baffle is open, and a connecting component is fixedly connected to the other end of the support bite ring, a valve body is fixedly connected to the connecting component, the valve body is hollow.

[0006] Preferably, the support bite ring has symmetrical through-holes, and one side of the support bite ring has a liquid storage hole that communicates with one of the through-holes. An impeller is coaxially rotatably connected to one end of the through-hole that communicates with the detection hole. A helical blade is coaxially fixedly connected to the impeller, and the outer edge of the helical blade is in movable contact with the circumferential wall of the through-hole.

[0007] Preferably, the tongue baffle has an oxygen hole and a detection hole running through it, and the connecting holes on both sides are respectively connected to the oxygen hole and the detection hole.

[0008] Preferably, a guide column is coaxially fixedly connected to the valve body, and a control component is provided inside the valve body. The control component includes a lower connecting pipe, a sealing column, a lower sealing plate, and an upper sealing plate. A movable plate is longitudinally and slidably connected to the inner circumferential wall of the valve body. The movable plate is slidably disposed on the guide column, and the movable plate divides the inner cavity of the valve body into a lower cavity and an upper cavity. An oxygen injection pipe and a connecting pipe are fixedly connected to both ends of the valve body, respectively. The oxygen injection pipe is connected to the upper cavity, and the connecting pipe is connected to the lower cavity. The oxygen injection pipe is also connected to an external oxygen tank. The valve body has a fixed extraction tube connected to its circumferential wall, which is connected to an external carbon dioxide monitoring instrument. A spring is fitted on the guide post, with both ends of the spring fixedly connected to the bottom wall of the moving plate and the bottom wall of the valve body, respectively. The upper sealing plate is fixedly connected to the top wall of the moving plate. The lower connecting pipe is fixedly connected to the circumferential wall of the valve body. The lower sealing plate is fixedly connected to the bottom wall of the moving plate. The sealing post is fixedly connected to the top of the moving plate. A connecting gas pipe is fixedly connected to the lower connecting pipe, and the other end of the connecting gas pipe is fixedly connected to a connecting pipe.

[0009] Preferably, the communication component includes a first air pipe and a second air pipe fixedly connected to the connecting pipe. The first air pipe and the second air pipe are respectively fixedly connected to the communication holes symmetrically arranged on the support bite ring. The first air pipe and the second air pipe are respectively connected to the oxygen hole and the detection hole through the symmetrically arranged communication holes. A first one-way valve and a second one-way valve are respectively fixedly connected to the first air pipe and the second air pipe.

[0010] Preferably, a sealing ring is coaxially fixedly connected to the lower end of the inner circumferential wall of the liquid storage hole, and a floating cone is longitudinally slidably connected to the inner circumferential wall of the liquid storage hole, with the bottom end of the floating cone being sealed to the inner circumferential wall of the sealing ring.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: 1. This application utilizes the oral pressure changes generated during the patient's breathing process as the sole power source to drive the movement of the moving plate inside the valve body. This pressure difference causes the moving plate, along with the sealing structure on it, to rise and fall, automatically switching between the oxygen injection pathway and the expiratory sampling pathway, thereby achieving precise separation of oxygen supply during inhalation and sampling during exhalation. 2. This application integrates a sealing column, an upper sealing plate, and a lower sealing plate driven by the same moving plate into the valve body, thereby realizing logical interlocking of the three interface states of oxygen injection, sampling, and bypass. The downward movement of the moving plate synchronously opens oxygen injection and bypass, and closes sampling; the upward movement synchronously opens sampling and closes oxygen injection and bypass. 3. This application provides a spiral blade mechanism driven by airflow in the oral cavity end communication hole. The kinetic energy of the exhaled airflow drives the blade to rotate, continuously scraping and collecting condensate and phlegm impurities on the inner wall of the tube, and pushing them to the liquid storage hole for temporary storage. 4. The automatic drain valve formed by the floating cone at the bottom of the liquid storage hole and the sealing ring in this application allows the floating cone to move upward and detach from the sealing surface when the accumulated liquid reaches a certain amount. The accumulated liquid is then automatically discharged under gravity. After the liquid is drained, the floating cone falls back and re-seals. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.

[0013] Figure 1 This is a schematic diagram of the overall structure of a multifunctional oropharyngeal ventilation tube proposed in this invention; Figure 2 This is a schematic diagram of the overall structure of a multifunctional oropharyngeal ventilation tube proposed in this invention from another perspective; Figure 3 This is a schematic cross-sectional view of the overall structure of a multifunctional oropharyngeal ventilation tube proposed in this invention; Figure 4 This is a schematic diagram of the overall cross-sectional structure of a multifunctional oropharyngeal ventilation tube proposed in this invention from another perspective; Figure 5 This is a schematic cross-sectional view of the valve body connection structure of a multifunctional oropharyngeal ventilation tube proposed in this invention; Figure 6 This is a cross-sectional view of the support bite ring connection structure of a multifunctional oropharyngeal ventilation tube proposed in this invention.

[0014] In the attached diagram: 1. Supporting bite ring; 2. Tongue baffle; 3. Valve body; 4. Connecting assembly; 11. Endoscope port; 12. Connecting hole; 13. Liquid reservoir; 121. Impeller; 122. Spiral blade; 131. Sealing ring; 132. Floating cone; 21. Oxygen port; 22. Detection port; 31. Oxygen injection tube; 32. Extraction tube; 33. Moving plate; 34. Guide post; 35. Lower connecting tube; 36. Connecting tube; 37. Lower cavity; 38. Upper cavity; 331. Sealing post; 332. Lower sealing plate; 333. Upper sealing plate; 342. Spring; 351. Connecting trachea; 41. First trachea; 42. Second trachea; 411. First one-way valve; 421. Second one-way valve.

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] Example 1, as Figures 1-6 As shown, the proposed solution provides a multifunctional oropharyngeal ventilation tube, including a support bite ring 1. The outer circumferential wall of the support bite ring 1 is wavy, designed to fit and hold the patient's incisors. An endoscope port 11 passes through the support bite ring 1. A tongue baffle 2 is coaxially fixedly connected to one end of the support bite ring 1. The tongue baffle 2 is made of silicone and is open. Both ends of the open side of the tongue baffle 2 are curved upwards to facilitate blocking the tongue. A connecting component 4 is fixedly connected to the other end of the support bite ring 1. A valve body 3 is fixedly connected to the connecting component 4. The valve body 3 is hollow. The support bite ring 1 has symmetrical through-holes 12, and one side of the support bite ring 1 has a liquid storage hole 13 that communicates with one of the through-holes 12; The tongue baffle 2 has an oxygen hole 21 and a detection hole 22 through it. The connecting holes 12 on both sides are respectively connected to the oxygen hole 21 and the detection hole 22. The liquid storage hole 13 is connected to the detection hole 22 through one of the connecting holes 12. A guide post 34 is coaxially fixedly connected inside the valve body 3. A control component is provided inside the valve body 3. A moving plate 33 is longitudinally and slidably connected to the inner circumferential wall of the valve body 3. The moving plate 33 is slidably disposed on the guide post 34. The moving plate 33 divides the inner cavity of the valve body 3 into a lower cavity 37 and an upper cavity 38. An oxygen injection pipe 31 and a connecting pipe 36 are fixedly connected to both ends of the valve body 3, respectively. The oxygen injection pipe 31 is connected to the upper cavity 38, and the connecting pipe 36 is connected to the lower cavity 37. The oxygen injection pipe 31 is connected to an external oxygen tank. An extraction pipe 32 is fixedly connected to the circumferential wall of the valve body 3. The extraction pipe 32 is connected to an external carbon dioxide monitoring instrument. The other ends of the two connecting holes 12 are unidirectionally connected to the connecting pipe 36 through a connecting component 4.

[0018] like Figures 1-3 and Figure 5As shown, the control assembly includes a lower connecting pipe 35, a sealing post 331, a lower sealing plate 332, and an upper sealing plate 333. A spring 342 is sleeved on the guide post 34. The two ends of the spring 342 are fixedly connected to the bottom wall of the moving plate 33 and the inner bottom wall of the valve body 3, respectively. The upper sealing plate 333 is fixedly connected to the top wall of the moving plate 33 and is close to the extraction pipe 32. The lower connecting pipe 35 is fixedly connected to the circumferential wall of the valve body 3. The lower sealing plate 332 is fixedly connected to the bottom wall of the moving plate 33 and is close to the lower connecting pipe 35. Under the initial action of spring 342, the moving plate 33 causes the lower sealing plate 332 and the upper sealing plate 333 to respectively block the lower connecting pipe 35 and the extraction pipe 32. The sealing column 331 is fixedly connected to the top of the moving plate 33 and is coaxially arranged with the oxygen injection pipe 31. In the initial state of the moving plate 33, the sealing column 331 blocks the oxygen injection pipe 31. A connecting gas pipe 351 is fixedly connected to the lower connecting pipe 35. The other end of the connecting gas pipe 351 is fixedly connected to the connecting pipe 36. When the moving plate 33 approaches the bottom wall of the valve body 3... The lower cavity 37 and spring 342 are compressed, and the volume of the upper cavity 38 increases. The sealing column 331 no longer blocks the oxygen injection pipe 31, and oxygen from the external oxygen tank enters the upper cavity 38 through the oxygen injection pipe 31. The moving plate 33 moves below the lower connecting pipe 35, and the moving plate 33 drives the lower sealing plate 332 to stop blocking the lower connecting pipe 35. At this time, the upper sealing plate 333 continues to block the extraction pipe 32. The oxygen in the upper cavity 38 enters the connecting pipe 36 through the lower connecting pipe 35 and the connecting air pipe 351. The lower connecting pipe 35 is connected to the upper cavity 38. When the moving plate 33 moves toward the top wall of the valve body 3, it compresses the upper cavity 38 and stretches the spring 342. At the same time, the volume of the lower cavity 37 increases. The moving plate 33 moves above the extraction tube 32. The moving plate 33 drives the upper sealing plate 333 to stop blocking the extraction tube 32. At this time, the lower sealing plate 332 continues to block the lower connecting tube 35. The extraction tube 32 is connected to the lower cavity 37. The up and down sliding of the moving plate 33, in coordination with the control component, switches the on / off state of the oxygen injection tube 31 and the connecting tube 36, and simultaneously switches the on / off state of the connecting tube 36 and the extraction tube 32.

[0019] like Figures 1-5As shown, the connecting component 4 includes a first air pipe 41 and a second air pipe 42 fixedly connected to the connecting pipe 36. The first air pipe 41 and the second air pipe 42 are respectively fixedly connected to the symmetrically arranged connecting holes 12 on the support bite ring 1. The first air pipe 41 and the second air pipe 42 are respectively connected to the oxygen port 21 and the detection port 22 through the symmetrically arranged connecting holes 12. The first air pipe 41 and the second air pipe 42 are respectively fixedly connected to a first one-way valve 411 and a second one-way valve 421. The flow direction of the first one-way valve 411 is from the connecting pipe 36 to the first air pipe 41. The first air pipe 41 is connected to the oxygen port 21 through the connecting hole 12 on one side, and the second air pipe 42 is connected to the detection port 22 through the connecting hole 12 on the other side. The flow direction of the second one-way valve 421 is from the second air pipe 42 to the connecting pipe 36.

[0020] like Figures 1-3 and Figure 6 As shown, an impeller 121 is coaxially rotatably connected to one end of one of the connecting holes 12 that communicates with the detection hole 22. A spiral blade 122 is coaxially fixedly connected to the impeller 121. The outer edge of the spiral blade 122 is in movable contact with the circumferential wall of the connecting hole 12. A sealing ring 131 is coaxially fixedly connected to the lower end of the inner circumferential wall of the liquid storage hole 13. A floating cone 132 is longitudinally slidably connected to the inner circumferential wall of the liquid storage hole 13. The bottom end of the floating cone 132 is sealed and fitted with the inner circumferential wall of the sealing ring 131. In the initial state, the floating cone 132 is fitted with the sealing ring 131 and can move with the liquid surface. When the spiral blade 122 pushes the condensate and impurities in one of the connecting holes 12 connected to the detection hole 22 into the liquid storage hole 13, the condensate pushes the floating cone 132 to move with the liquid surface. When the floating cone 132 is no longer fitted with the sealing ring 131, the condensate and impurities in the liquid storage hole 13 are discharged.

[0021] In actual use, the oxygen injection tube 31 is fixedly connected to the external oxygen tank, the extraction tube 32 is connected to the external carbon dioxide monitoring instrument, the tongue baffle 2 and the support bite ring 1 are placed in the oral cavity, the tongue baffle 2 presses down on the tongue, the teeth bite the support bite ring 1, the teeth bite the support bite ring 1 with the outer circumferential wall set in a wave shape, the lips naturally cover the support bite ring 1, and the gastroscope is passed through the gastroscope port 11 and the opening side of the tongue baffle 2, and the oral cavity is a closed cavity at this time. When the patient inhales, the oral pressure is low. Air is drawn from the lower cavity 37 through the oxygen port 21, the connecting hole 12 on one side, the first trachea 41, the first one-way valve 411, and the connecting pipe 36. The pressure in the lower cavity 37 is lower than the pressure in the upper cavity 38. The air pressure causes the moving plate 33 to move closer to the bottom wall of the valve body 3, compressing the spring 342. The sealing column 331 gradually moves away from the oxygen injection tube 31. When the sealing column 331 no longer blocks the oxygen injection tube 31, oxygen from the external oxygen tank flows through... Oxygen injection tube 31 enters the upper cavity 38. Moving plate 33 moves below the lower connecting tube 35. Moving plate 33 drives lower sealing plate 332 to stop blocking lower connecting tube 35. At this time, upper sealing plate 333 continues to block extraction tube 32. Oxygen in upper cavity 38 enters connecting tube 36 through lower connecting tube 35 and connecting air tube 351. It is then input into oral cavity and inhaled into lungs through first one-way valve 411, first air tube 41, connecting hole 12 on one side and oxygen hole 21. When the patient exhales, the oral cavity pressure is high, and the air in the oral cavity enters the lower cavity 37 through the detection hole 22, the connecting hole 12 on the other side, the second trachea 42, the second one-way valve 421, and the connecting tube 36. During exhalation, the first one-way valve 411 remains closed due to the pressure direction, and the pressure in the lower cavity 37 is greater than the pressure in the upper cavity 38. The air pressure drives the moving plate 33 to approach the top wall of the valve body 3, stretching the spring 342. The moving plate 33 drives the upper sealing plate 333 to no longer block the extraction tube 32. The moving plate 33 moves above the extraction tube 32. At this time, the lower sealing plate 332 continues to block the lower connecting tube 35. The extraction tube 32 is connected to the lower cavity 37, and the air enters the carbon dioxide monitoring instrument through the extraction tube 32. When air enters one of the connecting holes 12 that communicates with the detection hole 22, the airflow drives the impeller 121 to rotate, and the impeller 121 drives the spiral blades 122 to rotate. The spiral blades 122 scrape off the condensate adhering to the circumferential wall of the connecting hole 12 that communicates with the detection hole 22. The spiral blades 122 push the condensate and impurities into the sealing ring 131 in the storage hole 13. As the amount of condensate increases, the condensate pushes the floating cone 132 to move with the liquid surface. The floating cone 132 gradually moves away from the sealing ring 131. When the floating cone 132 no longer cooperates with the sealing ring 131, the condensate and impurities in the storage hole 13 are discharged from the storage hole 13 by gravity.

[0022] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A multifunctional oropharyngeal ventilation tube, comprising a support bite ring (1), wherein the outer circumferential wall of the support bite ring (1) is wavy, characterized in that: The gastroscope opening (11) is penetrated through the support bite ring (1). One end of the support bite ring (1) is coaxially fixedly connected to a tongue baffle (2). The tongue baffle (2) is open. The other end of the support bite ring (1) is fixedly connected to a communication component (4). A valve body (3) is fixedly connected to the communication component (4). The valve body (3) is hollow. The support bite ring (1) has symmetrical through-holes (12), and one side of the support bite ring (1) has a liquid storage hole (13) that communicates with one of the through-holes (12). The tongue baffle (2) has an oxygen hole (21) and a detection hole (22) through it. The connecting holes (12) on both sides are respectively connected to the oxygen hole (21) and the detection hole (22). The liquid storage hole (13) is connected to the detection hole (22) through one of the connecting holes (12). A guide post (34) is coaxially fixedly connected inside the valve body (3). A control component is provided inside the valve body (3). A moving plate (33) is longitudinally and slidably connected to the inner circumferential wall of the valve body (3). The moving plate (33) is slidably mounted on the guide post (34). The moving plate (33) divides the inner cavity of the valve body (3) into a lower cavity (37) and an upper cavity (38). An oxygen injection pipe (31) and a connecting pipe (36) are fixedly connected to both ends of the valve body (3). The oxygen injection pipe (31) is connected to the upper cavity (38). The connecting pipe (36) is connected to the upper cavity (38). The valve body (3) is connected to the lower cavity (37), the oxygen injection pipe (31) is connected to the external oxygen tank, the circumferential wall of the valve body (3) is fixedly connected to the extraction pipe (32), the extraction pipe (32) is connected to the external carbon dioxide monitoring instrument, and the other end of the two connecting holes (12) is connected to the connecting pipe (36) in one direction through the connecting component (4). The sliding up and down of the moving plate (33) and the cooperation of the control component switch the on and off state of the oxygen injection pipe (31) and the connecting pipe (36), and simultaneously switch the on and off state of the connecting pipe (36) and the extraction pipe (32).

2. The multifunctional oropharyngeal ventilation tube according to claim 1, characterized in that: The control assembly includes a lower connecting pipe (35), a sealing column (331), a lower sealing plate (332), and an upper sealing plate (333). The upper sealing plate (333) is fixedly connected to the top wall of the moving plate (33). The lower connecting pipe (35) is fixedly connected to the circumferential wall of the valve body (3). The lower sealing plate (332) is fixedly connected to the bottom wall of the moving plate (33). In the initial state, the moving plate (33) connects the lower sealing plate (332) and the upper sealing plate (333). The lower connecting pipe (35) and the extraction pipe (32) are sealed respectively. The sealing column (331) is fixedly connected to the top of the moving plate (33). The sealing column (331) and the oxygen injection pipe (31) are coaxially arranged. In the initial state of the moving plate (33), the sealing column (331) seals the oxygen injection pipe (31). The lower connecting pipe (35) is fixedly connected to the connecting gas pipe (351). The other end of the connecting gas pipe (351) is fixedly connected to the connecting pipe (36).

3. A multifunctional oropharyngeal ventilation tube according to claim 2, characterized in that: When the moving plate (33) approaches the bottom wall of the valve body (3), the sealing column (331) no longer blocks the oxygen injection pipe (31), the moving plate (33) moves to the bottom of the lower connecting pipe (35), the moving plate (33) drives the lower sealing plate (332) to no longer block the lower connecting pipe (35), the lower connecting pipe (35) is connected to the upper cavity (38), when the moving plate (33) moves towards the top wall of the valve body (3), the moving plate (33) moves to the top of the extraction pipe (32), the moving plate (33) drives the upper sealing plate (333) to no longer block the extraction pipe (32), the extraction pipe (32) is connected to the lower cavity (37).

4. A multifunctional oropharyngeal ventilation tube according to claim 3, characterized in that: The connecting component (4) includes a first air pipe (41) and a second air pipe (42) fixedly connected to the connecting pipe (36). The first air pipe (41) and the second air pipe (42) are respectively fixedly connected to the connecting holes (12) symmetrically arranged on the support bite ring (1). The first air pipe (41) and the second air pipe (42) are respectively connected to the oxygen port (21) and the detection port (22) through the symmetrically arranged connecting holes (12). 2) The first one-way valve (411) and the second one-way valve (421) are fixedly connected to each other. The first air tube (41) is connected to the oxygen port (21) through the connecting hole (12) on one side. The second air tube (42) is connected to the detection port (22) through the connecting hole (12) on one side. The flow direction of the first one-way valve (411) is from the connecting pipe (36) to the first air tube (41). The flow direction of the second one-way valve (421) is from the second air tube (42) to the connecting pipe (36).

5. A multifunctional oropharyngeal ventilation tube according to claim 4, characterized in that: An impeller (121) is coaxially rotatably connected to one end of a connecting hole (12) that communicates with the detection hole (22). A spiral blade (122) is coaxially fixedly connected to the impeller (121). The outer edge of the spiral blade (122) is in contact with the circumferential wall of the connecting hole (12).

6. A multifunctional oropharyngeal ventilation tube according to claim 5, characterized in that: A sealing ring (131) is coaxially fixedly connected to the lower end of the inner circumferential wall of the liquid storage hole (13). A floating cone (132) is longitudinally slidably connected to the inner circumferential wall of the liquid storage hole (13). The bottom end of the floating cone (132) is sealed and fitted with the inner circumferential wall of the sealing ring (131). In the initial state, the floating cone (132) is fitted with the sealing ring (131) and can move with the liquid surface.

7. A multifunctional oropharyngeal ventilation tube according to claim 6, characterized in that: When the spiral blade (122) pushes the condensate and impurities in one of the connecting holes (12) connected to the detection hole 22 into the storage hole (13), the condensate pushes the floating cone (132) to move with the liquid surface. When the floating cone (132) no longer cooperates with the sealing ring (131), the condensate and impurities in the storage hole (13) are discharged.

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