Color-changing pressure sensing air bag for trachea cannula

Abstract

The invention provides a color-changing pressure sensing air bag for tracheal intubation, and relates to the technical field of sensing air bags, the color-changing pressure sensing air bag comprises an intubation tube body and an air bag body, the intubation tube body comprises an inflation pipeline, a light supplementing mechanism, a color-changing monitoring assembly and a secretion discharging assembly, and a port is formed in the tail end of the intubation tube body; a suction opening is formed in the front end of the cannula body, the cannula body is connected with a breathing machine through the suction opening, a guide wire is inserted into the cannula body in a penetrating mode, a light supplementing mechanism is further inserted into the cannula body, and the color-changing pressure sensing air bag can change color according to different color changes. The pressure state of the current air bag is directly judged from the outside to determine whether to deflate or inflate, so that the problems that blood flow of organ mucosa is blocked due to too high pressure, ischemia and necrosis are easily caused, and air leakage is easily caused due to too low pressure are avoided. And by means of the secretion discharging assembly, discharging of the secretions concentrated at the end portion after the air bag is expanded is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of induction airbags, and particularly to a color-changing pressure induction airbag for tracheal intubation. Background Technique

[0002] Tracheal intubation is a technique of inserting a special endotracheal tube through the oral cavity or nasal cavity and into the trachea or bronchus through the glottis to establish an artificial airway. It can provide the best conditions for airway patency, ventilation and oxygen supply, airway suction, etc. It is widely used in multiple disciplines such as the emergency department, anesthesiology department, respiratory medicine department, and intensive care medicine department. Among them, inflating the airbag is an important link in the process of tracheal intubation. The main function of the airbag is to fix the tracheal intubation and prevent it from falling off or shifting. After the tracheal intubation enters the trachea, the airbag will be inflated to form a sealed environment to ensure that the air provided by the ventilator or artificial respirator can smoothly enter the lungs and avoid air leakage.

[0003] Currently, the pressure value range of the airbags on the market is between 25 and 30 cmH2O. However, in actual clinical practice, doctors need to control the injection volume according to the different conditions of patients. In the prior art, this process is usually manually sensed by anesthesiologists relying on their own experience, so there is a large instability. Too high pressure will block the blood flow of the organ mucosa, easily causing ischemia and necrosis, while too low pressure is prone to air leakage and other situations. On the other hand, after the airbag is inflated, it is necessary to evacuate the secretions at the end of the airbag. This process may result in the inability to efficiently discharge the secretions mainly accumulated at the bottom due to the offset of the evacuation port inside the lumen to the upper side. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a color-changing pressure induction airbag for tracheal intubation to solve the problems raised in the above background technique. The present invention can observe the current pressure state of the airbag through different color changes to decide whether to deflate or inflate, avoiding the problems of blocking the blood flow of the organ mucosa caused by too high pressure, which is easy to cause ischemia and necrosis, and the situation of easy air leakage due to too low pressure. And with the help of the secretion discharge component, the effect of accelerating the discharge of the secretions concentrated at the end after the airbag is inflated is achieved.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions: A color-changing pressure-sensing balloon for tracheal intubation, comprising an intubation body and a balloon body. The intubation body includes an inflation pipeline, a supplementary lighting mechanism, a color-changing monitoring component, and a secretion discharge component. A port is provided at the end of the intubation body, and a suction port is provided at the front end of the intubation body. The intubation body is connected to a ventilator through the suction port. A guide wire is inserted into the intubation body, and a supplementary lighting mechanism is also inserted into the intubation body. The balloon body is integrally formed on the surface of the intubation body at a position 2-3 cm away from the port. The end of the supplementary lighting mechanism is embedded into the balloon body. An extraction cavity is provided at one end inside the balloon body, and a guiding component is filled in the extraction cavity. The guiding component is sleeved on the surface of the intubation body. The inflation pipeline, the color-changing monitoring component, and the secretion discharge component are also connected to the surface of the intubation body. A pressure-sensitive color-changing layer is coated on the surface of the balloon body.

[0006] Further, the ends of the color-changing monitoring component and the secretion discharge component are both embedded inside the balloon body, and the secretion discharge component is communicated with the inside of the extraction cavity. The pressure-sensitive color-changing layer includes a cholesterol liquid crystal film.

[0007] Further, the supplementary lighting mechanism includes a light source, a first light guiding pipeline, and a light-transmitting bead. The first light guiding pipeline penetrates into the intubation body from the inside, and the light-transmitting bead is embedded at the bottom end of the first light guiding pipeline. A card slot is provided on the surface of the intubation body corresponding to the inside of the balloon body.

[0008] Further, the number of the light-transmitting beads is the same as the number of the card slots, and each light-transmitting bead is embedded into the card slot. The surface of the guide wire abuts against the surface of the first light guiding pipeline.

[0009] Further, a reflective coating is coated on the inner wall of the first light guiding pipeline, and one end of the first light guiding pipeline embedded into the balloon body is in a closed state. A first docking port is provided at the other end of the first light guiding pipeline, and the light-emitting port end of the light source is embedded into the first docking port.

[0010] Further, the color-changing monitoring component includes a second light guiding pipeline, an annular optical fiber, a front-end optical fiber, and a tail-end optical fiber. The second light guiding pipeline is embedded on the inner wall of the intubation body, and the tail-end optical fiber is inserted into the second light guiding pipeline. The annular optical fiber is buried on the surface of the intubation body. The front-end optical fiber and the tail-end optical fiber are both communicated with the annular optical fiber.

[0011] Further, a light-shielding sleeve is connected to the end of the second light guiding pipeline. An observation port is provided at the end of the light-shielding sleeve. One end of the tail-end optical fiber is embedded into the light-shielding sleeve, and the end of the tail-end optical fiber is hidden in the middle area of the light-shielding sleeve.

[0012] Further, the secretion discharge assembly includes a discharge pipe, a pumping cavity, and a guiding assembly. The discharge pipe is embedded in the inner wall of the intubation body, and one end of the discharge pipe is provided with a second mating port for connecting to a pumping syringe.

[0013] Further, a diaphragm is integrally formed on one side of the pumping cavity. An annular cavity is attached to the inner wall of the pumping cavity, and communication holes are provided on the surface of the annular cavity. The discharge pipe is communicated with the inside of the annular cavity.

[0014] Further, the guiding assembly includes a front baffle and a rear baffle, and both the front baffle and the rear baffle are in an arc structure. An outer pumping hole is provided at one end of the pumping cavity. The front baffle covers the surface of the outer pumping hole in the upper region. The front baffle and the rear baffle are combined and connected by a connecting rod. A chute is provided in the corresponding area of the intubation body inside the pumping cavity. The inner ring part of the rear baffle is embedded in the inside of the chute, and a weight-increasing strip is attached to the surface of the rear baffle.

[0015] Advantages of the present invention:

[0016] 1. The color-changing pressure-sensing airbag for tracheal intubation can change color according to the pressure change between the airbag and the trachea by setting a pressure-sensitive color-changing layer on the surface of the airbag, so as to judge the current pressure state of the airbag through different color changes, and then decide whether to deflate or inflate, avoiding problems such as high pressure blocking the blood flow of the organ mucosa, which is likely to cause ischemia and necrosis, and low pressure is likely to cause air leakage.

[0017] 2. The color-changing pressure-sensing airbag for tracheal intubation is installed with a variety of optical fiber structures inside the airbag, and the light source is irradiated to the area where the front-end optical fiber is located through an external supplementary lighting mechanism. Thus, the color presented after the airbag area is pressured can be directly observed from the external color-changing monitoring component. The supplementary lighting mechanism is installed synchronously with the guiding wire along with the intubation body to ensure the stability of the pre-supplementary lighting process of the supplementary lighting mechanism and the flexibility to be quickly removed after inflation.

[0018] 3. The color-changing pressure-sensing airbag for tracheal intubation accelerates the discharge of the secretions concentrated at the end of the inflated airbag by means of the secretion discharge assembly. An independent guiding assembly is provided inside the airbag. With the help of this guiding assembly, even if the intubation body rotates after being inserted into the trachea, it can still ensure the extraction and discharge of the secretions concentrated in the bottom area, improving the efficiency and comprehensiveness of the secretion extraction. Description of the Drawings

[0019] Figure 1This is a schematic structural diagram of the outer shape of a color-changing pressure-sensing balloon for tracheal intubation according to the present invention;

[0020] Figure 2 This is a schematic connection diagram of the suction port part of the present invention;

[0021] Figure 3 This is a connection diagram of the discharge pipeline part of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the airbag body part of the present invention;

[0023] Figure 5 This is an internal cross-sectional view of the airbag body of the present invention;

[0024] Figure 6 This is a fiber optic structure diagram inside the airbag body of the present invention;

[0025] Figure 7 This is a schematic structural diagram of the guiding component part of the present invention;

[0026] In the figure: 1. Intubation body; 2. Port; 3. Airbag body; 4. Suction port; 5. Guide wire; 6. Inflation pipeline; 7. Supplementary light mechanism; 8. Color-changing monitoring component; 9. Secretion discharge component; 10. Light source; 11. First light guide pipeline; 12. First docking port; 13. Second light guide pipeline; 14. Light-shielding sleeve; 15. Tail-end optical fiber; 16. Observation port; 17. Withdrawal syringe; 18. Discharge pipeline; 19. Second docking port; 20. Pressure-sensitive color-changing layer; 21. Withdrawal cavity; 22. Outer-layer withdrawal hole; 23. Diaphragm; 24. Guiding component; 25. Ring-shaped optical fiber; 26. Front-end optical fiber; 27. Translucent bead; 28. Card slot; 29. Ring-shaped cavity; 30. Communication hole; 31. Front baffle; 32. Connecting rod; 33. Rear baffle; 34. Slide groove; 35. Weight-increasing strip. Detailed implementation manners

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0028] Please refer to Figures 1 to 7The present invention provides the following technical solutions: a color-changing pressure-sensing airbag for endotracheal intubation, comprising an intubation body 1 and an airbag body 3, wherein the intubation body 1 comprises an inflation pipe 6, a light-filling mechanism 7, a color-changing monitoring component 8 and a secretion discharge component 9, a port 2 is provided at the end of the intubation body 1, a suction port 4 is provided at the front end of the intubation body 1, and the intubation body 1 is connected to a ventilator through the suction port 4, a guide wire 5 is inserted into the interior of the intubation body 1, and a light-filling mechanism 7 is also inserted into the interior of the intubation body 1, and the airbag body 3 ... and a port 2 is provided at the end of the intubation body 1, and a suction port 4 is provided at the front end of the intubation body 1, and the intubation body 1 is connected to a ventilator through the suction port 4, and a guide wire 5 is inserted into the interior of the intubation body 1, and a light-filling mechanism 7 is also inserted into the interior of the intubation body 1, and the airbag body 3 comprises an inflation pipe 6, a light-filling mechanism 7, a color-changing monitoring component The balloon body 3 is integrally formed on the surface of the cannula body 1 and at a position 2-3 cm away from the port 2. The end of the light-filling mechanism 7 is embedded in the interior of the balloon body 3. A detachment cavity 21 is opened at one end of the interior of the balloon body 3. The interior of the detachment cavity 21 is filled with a guide component 24. The guide component 24 is sleeved on the surface of the cannula body 1. The surface of the cannula body 1 is also connected with an inflation pipe 6, a color change monitoring component 8 and a secretion discharge component 9. The surface of the balloon body 3 is coated with a pressure-sensitive color-changing layer 20. The color-changing pressure-sensing balloon can judge the pressure according to the color during the inflation process by filling the pressure-sensitive color-changing layer 20 on the surface of the balloon body 3.

[0029] When the present invention is used, a laryngoscope is first used to expose the glottis; then the guide wire 5 is inserted into the interior of the trachea, and then the endotracheal tube body 1 is inserted along the laryngoscope based on the guide wire 5, and enters the patient's trachea through the glottis to ensure that the insertion depth of the tube body 1 is appropriate; after the intubation is completed, the guide wire 5 is removed, and the airbag body 3 is inflated through the inflation pipe 6. During this process, the light source 10 is irradiated to the interior of the airbag with the help of the fill light mechanism 7, and the current squeezing state between the airbag body 3 and the trachea is directly observed from the outside with the help of the color change monitoring component 8 until the inflation process of the airbag body 3 is completed, and then the first light guide pipe 11 in the fill light mechanism 7 can be drawn out, and the secretion accumulated at the end of the airbag body 3 can be drawn out with the help of the secretion discharge component 9, and finally the ventilator pipe is connected to the end of the endotracheal tube, and mechanical ventilation is started to complete the entire insertion process.

[0030] In this embodiment, the ends of the color-changing monitoring component 8 and the secretion discharge component 9 are embedded in the inner side of the airbag body 3, and the secretion discharge component 9 is connected to the inside of the extraction cavity 21, and the pressure-sensitive color-changing layer 20 includes a cholesterol liquid crystal film. By arranging the pressure-sensitive color-changing layer 20 on the surface of the airbag, it will change color according to the pressure change between the trachea, and then the current pressure state of the airbag can be judged by the difference in color change, and then decide whether to deflate or inflate, so as to avoid the situation that the blood flow of the organ mucosa is blocked due to excessive pressure, which is easy to cause ischemia and necrosis, and the situation that the pressure is too low and it is easy to leak.

[0031] Specifically, the principle of pressure-sensitive color change of the pressure-sensitive color-changing layer 20 in the airbag is essentially to change the optical wave characteristics through the mechanical response of the material microstructure, which belongs to the mechanical-optical coupling effect. Cholesteric liquid crystal molecules are arranged in a helical layer, and the helical pitch determines the wavelength of the reflected light (Bragg reflection principle). When the airbag is compressed, the layer spacing of the liquid crystal layer is compressed or the helical structure is distorted, resulting in a shift of the reflected wavelength. Finally, through the mechanical deformation of the microstructure, the photonic bandgap is regulated, and finally a cascaded response mechanism of macroscopic color change is achieved. Coupled with the layout of the optical fiber structure, the current pressure state of the airbag can be directly observed from the outside.

[0032] In this embodiment, the supplementary light mechanism 7 includes a light source 10, a first light guide pipe 11, and a light-transmitting bead 27. The first light guide pipe 11 penetrates into the inside of the intubation body 1. The light-transmitting bead 27 is embedded at the bottom end of the first light guide pipe 11. A card slot 28 is formed on the surface of the intubation body 1 corresponding to the inner side of the airbag body 3. The number of the light-transmitting beads 27 is the same as that of the card slots 28, and each light-transmitting bead 27 is embedded into the inside of the card slot 28. The surface of the guiding wire 5 abuts against the surface of the first light guide pipe 11. A reflective coating is applied to the inner wall of the first light guide pipe 11, and one end of the first light guide pipe 11 embedded into the airbag body 3 is in a closed state. A first docking port 12 is formed at the other end of the first light guide pipe 11. One end of the light outlet of the light source 10 is embedded into the inside of the first docking port 12.

[0033] Specifically, the light source 10 device externally irradiates light into the inside of the first guiding pipe. The light is transmitted along the first light guide pipe 11 to the inside of the airbag body 3, so that the inside of the airbag body 3 generates light. Since the airbag body 3 has already produced a color change effect after being compressed at this time, and the color of the airbag body 3 is transmitted and displayed to the outside through the internal illumination of the airbag body 3 in cooperation with the color change monitoring component 8.

[0034] In this embodiment, the color-changing monitoring component 8 includes a second light guide pipe 13, an annular optical fiber 25, a front-end optical fiber 26 and a tail-end optical fiber 15. The second light guide pipe 13 is embedded in the inner wall of the intubation body 1, and the tail-end optical fiber 15 is inserted into the inside of the second light guide pipe 13. The annular optical fiber 25 is embedded in the surface of the intubation body 1. The front-end optical fiber 26 and the tail-end optical fiber 15 are both communicated with the annular optical fiber 25. A light-shielding sleeve 14 is connected to the end of the second light guide pipe 13, and an observation port 16 is opened at the end of the light-shielding sleeve 14. One end of the tail-end optical fiber 15 is embedded in the inside of the light-shielding sleeve 14, and the end of the tail-end optical fiber 15 is hidden in the middle area of the light-shielding sleeve 14. A variety of optical fiber structures are installed inside the airbag, and the light source 10 is irradiated to the area where the front-end optical fiber 26 is located through the external light supplement mechanism 7. Thus, the color presented after the airbag area is pressurized can be directly observed from the outside color-changing monitoring component 8. The light supplement mechanism 7 cooperates with the guide wire 5 to be synchronously installed along with the intubation body 1, ensuring the stability of the light supplement process of the light supplement mechanism 7 in the early stage and the flexibility to be quickly taken out after inflation is completed.

[0035] Specifically, the cooperation between the front-end optical fiber 26 and the annular optical fiber 25 arranged inside the airbag body 3 can map the color-changing phenomenon generated inside the airbag body 3 to the inside of the optical fiber in cooperation with the light source 10, and then transmit it outward through the tail-end optical fiber 15. Through the observation port 16, the color of the end of the tail-end optical fiber 15 can be directly observed in the dark internal environment of the light-shielding sleeve 14, and thus the change state of the color inside the current airbag body 3 can be judged.

[0036] In this embodiment, the secretion discharge assembly 9 includes a discharge pipe 18, a pumping cavity 21, and a guiding assembly 24. The discharge pipe 18 is embedded in the inner wall of the intubation body 1, and one end of the discharge pipe 18 is provided with a second docking port 19, and the second docking port 19 is used to connect with the extraction syringe 17. One side of the pumping cavity 21 is integrally formed with a diaphragm 23. An annular cavity 29 is attached to the inner wall of the pumping cavity 21, and communication holes 30 are formed on the surface of the annular cavity 29. The discharge pipe 18 is communicated with the inside of the annular cavity 29. The guiding assembly 24 includes a front baffle 31 and a rear baffle 33, and both the front baffle 31 and the rear baffle 33 are in an arc structure. An outer extraction hole 22 is formed at one end of the pumping cavity 21. The front baffle 31 covers the surface of the outer extraction hole 22 in the upper region. The front baffle 31 and the rear baffle 33 are combined and connected by a connecting rod 32. A chute 34 is formed in the corresponding area of the intubation body 1 inside the pumping cavity 21. The inner ring part of the rear baffle 33 is embedded in the chute 34, and a weight-increasing strip 35 is attached to the surface of the rear baffle 33. With the effect of the secretion discharge assembly 9 to accelerate the discharge of the secretion concentrated at the rear end after the airbag expands, and an independent guiding assembly 24 is arranged inside the airbag. With the help of this guiding assembly 24, even if the intubation body 1 rotates after being inserted into the trachea, it can still ensure that the secretion concentrated in the bottom area is extracted and discharged, improving the efficiency and comprehensiveness of the secretion extraction.

[0037] Specifically, when the intubation body 1 is inserted into the trachea along the guide wire 5, pressure will be provided to the surface of the first light guide sleeve through the surface of the guide wire 5, so as to ensure that the light-transmitting bead 27 at the end can always be embedded in the card slot 28 without detachment, and the light is transmitted into the airbag body 3 through the light-transmitting bead 27 from the card slot 28. After the airbag body 3 is inflated, by connecting the extraction syringe 17 with the discharge pipe 18 and pumping air, the secretion accumulated at the end of the airbag body 3 can be extracted along the extraction pipe. Due to the effect of the weight-increasing strip 35, the rear baffle 33 is always pressed downward. Therefore, when the rear baffle 33 rotates along the chute 34, the front baffle 31 will always be in the upper region, so that the outer extraction hole 22 in the upper region can always be blocked, ensuring that the extracted gas can only flow in from the outer extraction hole 22 at the lower part, so as to efficiently pump the secretion accumulated at the bottom into the annular cavity 29 and finally discharge it along the extraction pipe. This process can also prevent the outer air flow from being continuously pumped into the pumping cavity 21 in the area of the upper outer extraction hole 22.

[0038] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

[0039] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A color-changing pressure-sensing airbag for endotracheal intubation, comprising an intubation tube body (1) and an airbag body (3), characterized in that: The cannula body (1) comprises an inflation pipe (6), a light-filling mechanism (7), a color change monitoring component (8) and a secretion discharge component (9); a port (2) is provided at the end of the cannula body (1); a suction port (4) is provided at the front end of the cannula body (1); and the cannula body (1) is connected to a ventilator via the suction port (4); a guide wire (5) is inserted into the interior of the cannula body (1); and a light-filling mechanism (7) is also inserted into the interior of the cannula body (1); the airbag body (3) is integrally formed on the surface of the cannula body (1) and is connected to the cannula body (1). The end of the light-filling mechanism (7) is embedded in the interior of the airbag body (3) at a position 2-3 cm away from the port (2). A withdrawal cavity (21) is opened at one end of the interior of the airbag body (3). The interior of the withdrawal cavity (21) is filled with a guide component (24). The guide component (24) is sleeved on the surface of the cannula body (1). The surface of the cannula body (1) is also connected to an inflation pipe (6), a color change monitoring component (8) and a secretion discharge component (9). The surface of the airbag body (3) is coated with a pressure-sensitive color change layer (20).

2. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 1, characterized in that: The ends of the color change monitoring component (8) and the secretion discharge component (9) are embedded in the inner side of the airbag body (3), and the secretion discharge component (9) is connected to the inside of the extraction cavity (21), and the pressure-sensitive color change layer (20) includes a cholesterol liquid crystal film.

3. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 1, characterized in that: The light-filling mechanism (7) comprises a light source (10), a first light-guiding pipe (11) and a light-transmitting bead (27); the first light-guiding pipe (11) penetrates from the inside of the cannula body (1); the light-transmitting bead (27) is embedded at the bottom of the end of the first light-guiding pipe (11); and a slot (28) is provided on the surface of the cannula body (1) corresponding to the inner side of the airbag body (3).

4. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 3, characterized in that: The number of the light-transmitting beads (27) is the same as the number of the slots (28), and each light-transmitting bead (27) is embedded in the interior of the slot (28), and the surface of the guide wire (5) is pressed against the surface of the first light-guiding pipe (11).

5. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 4, characterized in that: The inner wall of the first light guide pipe (11) is coated with a reflective coating, and one end of the first light guide pipe (11) embedded in the interior of the airbag body (3) is in a closed state, and the other end of the first light guide pipe (11) is provided with a first docking port (12), and one end of the light outlet of the light source (10) is embedded in the interior of the first docking port (12).

6. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 3, characterized in that: The color change monitoring component (8) comprises a second light guide pipe (13), a ring optical fiber (25), a front optical fiber (26) and a rear optical fiber (15); the second light guide pipe (13) is embedded in the inner wall of the cannula body (1), and the rear optical fiber (15) is inserted into the interior of the second light guide pipe (13); the ring optical fiber (25) is embedded in the surface of the cannula body (1); the front optical fiber (26) and the rear optical fiber (15) are both connected to the ring optical fiber (25).

7. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 6, characterized in that: The end of the second light-guiding pipe (13) is connected to a light-shielding sleeve (14), the end of the light-shielding sleeve (14) is provided with an observation port (16), one end of the tail optical fiber (15) is embedded in the interior of the light-shielding sleeve (14), and the end of the tail optical fiber (15) is hidden in the middle area of ​​the light-shielding sleeve (14).

8. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 2, characterized in that: The secretion discharge component (9) comprises a discharge pipe (18), an extraction cavity (21) and a guide component (24); the discharge pipe (18) is embedded in the inner wall of the cannula body (1), and a second docking port (19) is provided at one end of the discharge pipe (18); and the second docking port (19) is used to be connected to the extraction needle tube (17).

9. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 8, characterized in that: A diaphragm (23) is integrally formed on one side of the extraction cavity (21), an annular cavity (29) is attached to the inner wall of the extraction cavity (21), a connecting hole (30) is provided on the surface of the annular cavity (29), and the discharge pipe (18) is connected to the interior of the annular cavity (29).

10. A color-changing pressure-sensing airbag for endotracheal intubation according to claim 9, characterized in that: The guide assembly (24) includes a front baffle (31) and a rear baffle (33), and the front baffle (31) and the rear baffle (33) are both arc-shaped structures. An outer layer withdrawal hole (22) is opened at one end of the withdrawal cavity (21), and the front baffle (31) covers the surface of the outer layer withdrawal hole (22) in the upper area. The front baffle (31) and the rear baffle (33) are combined and connected through a connecting rod (32). A slide groove (34) is opened on the area of ​​the cannula body (1) corresponding to the inner side of the withdrawal cavity (21), and the inner ring part of the rear baffle (33) is embedded in the interior of the slide groove (34). A weight-increasing strip (35) is mounted on the surface of the rear baffle (33).

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