Tracheal tube with medicine spraying function

Abstract

The present application relates to the technical field of medical devices, and more particularly to a tracheal tube with medicine spraying function, comprising a tracheal tube body, a shell is arranged outside the tracheal tube body, the shell is divided into a driving cavity and a liquid storage cavity by a partition plate, and the first and second pistons are connected through a piston rod, the linkage of air bag inflation and deflation and medicine liquid spraying and defusing can be realized by air injection and air extraction of the driving cavity, the first air bag and the second air bag are arranged on the outer periphery of the tracheal tube body in the axial direction, the ring plate is connected between the first air bag and the second air bag, the first air bag is inflated first to reach the pressure, then the gas enters the second air bag to seal the airway, the first air bag is depressurized first to trigger the medicine liquid spraying and defusing, when the pressure of the second air bag is higher than that of the first air bag, the exhaust is discharged through the first air bag through the check valve, so that the medicine spraying action is prior to the complete pressure relief of the second air bag. The present application effectively solves the problem of inaccurate medicine liquid spraying time in the traditional extubation process, accurately controls the medicine spraying time through the air-liquid synchronous driving mode, and greatly improves the safety of clinical use.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a tracheal intubation tube with a drug spraying function. Background Technology

[0002] Endotracheal intubation is a commonly used medical device in clinical anesthesia, intensive care, and emergency procedures to establish an artificial airway to maintain a patient's respiratory patency. In practice, the endotracheal tube is typically sealed to the airway wall using an inflatable cuff to prevent gas leakage. During endotracheal intubation, especially during extubation, airway irritation can cause coughing, spasms, or localized discomfort in patients. To mitigate these adverse reactions, anesthetic drugs or other medications are usually sprayed into the airway for analgesia, sedation, or lubrication.

[0003] In the existing technology, the method of drug administration still has at least the following defects. For example, the existing method of drug administration usually sprays the drug into the airway through a syringe or spraying device, which requires medical staff to perform the spraying operation alone. This method has the following problems: the timing of drug administration depends on experience judgment, and it is easy to be too early or too late during the operation, which affects the effect of the drug. However, anesthetic drugs usually require a certain onset time. If the tube is extubated before the drug has fully taken effect, it is still easy to lead to insufficient analgesia or sedation.

[0004] Therefore, a endotracheal tube with a spraying function is needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a tracheal tube with a spraying function to solve the problem that the timing of drug administration in the prior art depends on experience and that the extubation is completed before the drug has fully exerted its effect, resulting in insufficient analgesia or sedation.

[0006] This invention discloses an endotracheal cannula with a spraying function, comprising: a cannula body; a first air bladder and a second air bladder are axially arranged on the outer wall of the cannula body; a ring plate connects the first air bladder and the second air bladder; an air injection tube is connected to the first air bladder and communicates with the air injection tube; a one-way pressure limiting valve and a check valve are installed on the ring plate; an outer connecting ring is fixedly disposed on the outer periphery of the cannula body, and a spray nozzle for spraying liquid is opened on the outer connecting ring; a shell is disposed outside the cannula body, and a partition is fixedly disposed inside the shell, dividing the interior of the shell into a driving chamber and a liquid storage chamber; a first piston and an elastic element are disposed in the driving chamber of the shell. The first piston is pressed against the inner wall of the drive chamber. The two ends of the elastic element are respectively fixedly connected to the partition plate on one side of the drive chamber and the first piston. A self-sealing interface for docking with an external air injection / vacuuming device is installed on the drive chamber of the housing. A second piston is installed inside the liquid storage chamber of the housing, pressed against the inner wall of the liquid storage chamber. A second one-way valve interface and a first one-way valve interface are respectively connected to both sides of the liquid storage chamber. The second one-way valve interface is used to communicate with an external ring, and the first one-way valve interface is used to communicate with an external liquid source. A piston rod is connected between the second piston and the first piston. The piston rod has a hollow structure, and a connection port for communicating with the air injection pipe is installed at the lower end of the piston rod. The thickness of the ring plate is 2-5 mm. Multiple spray nozzles are evenly distributed on the external ring.

[0007] Preferably, the lower end of the air injection tube is provided with an air injection port, which is located inside the first airbag; the second one-way valve interface is connected to a liquid injection tube, and the end of the liquid injection tube away from the second one-way valve interface is connected to an outer ring; the lower end of the liquid injection tube is provided with a liquid injection port, which is located inside the outer ring; the first one-way valve interface is connected to a liquid replenishment tube, and a Luer interface is installed at the end of the liquid replenishment tube; the first one-way valve interface is connected to an external liquid source through the liquid replenishment tube and the Luer interface.

[0008] Preferably, a first air hole is provided on the lower side of the drive chamber of the housing, and a second air hole is provided at the lower end of the liquid storage chamber. The first air hole and the second air hole are used to balance the air pressure during the movement of the first piston and the second piston, respectively. The diameter of the second air hole is larger than the outer diameter of the air injection pipe.

[0009] Preferably, the outer ring is fixedly disposed on the outer periphery of the cannula body, and an annular drug solution cavity is formed inside the outer ring. The injection port and the annular drug solution cavity are connected, and the spray port is connected to the annular drug solution cavity.

[0010] Preferably, the check valve includes: a fixing part and a valve plate, the valve plate being installed on one side of the fixing part; the ring plate having a through hole, the ring plate having a connecting part installed on the side near the first airbag and adjacent to the through hole, the fixing part being installed on the connecting part, and the valve plate being located at the through hole to seal the through hole.

[0011] Preferably, the elastic element is a compression spring.

[0012] Preferably, the self-sealing interface includes a valve core and a spring for driving the valve core to reset. The lower end of the valve core is connected to a locking assembly for locking and sealing the piston rod. The locking assembly includes: an unlocking push rod connected to the lower end of the valve core; a tapered plug is fixedly connected to the lower end of the unlocking push rod; a sleeve is provided on the outside of the unlocking push rod, and the sleeve passes through the piston rod; an elastic expansion sleeve is connected to the lower end of the sleeve, and the bottom end of the elastic expansion sleeve is provided with a tapered surface that mates with the tapered plug.

[0013] This invention has at least the following beneficial effects: 1. This application provides a housing outside the cannula body and forms a driving chamber and a liquid storage chamber inside the housing. Combined with the linkage of the first piston, the second piston and the elastic element, the external air injection and degassing device can simultaneously inflate the first airbag, store energy in the elastic element and absorb liquid in the liquid storage chamber when inflating the driving chamber. When degassing the driving chamber, it can drive the liquid medicine to spray out, thereby linking the spraying process with the inflation and deflation process of the airbag, which is beneficial to improving the timing of drug administration.

[0014] 2. This application provides a first and a second airbag arranged axially around the periphery of the cannula body, with an annular plate, a one-way pressure limiting valve, and a check valve between them. This allows gas to enter the first airbag first during the injection phase, and then, after the pressure in the first airbag reaches a preset pressure, it enters the second airbag through the one-way pressure limiting valve, causing the second airbag to expand and conform to the inner wall of the airway. During the degassing phase, the first airbag depressurizes before the second airbag and triggers the spraying action. When the pressure inside the second airbag is greater than the pressure inside the first airbag, the check valve then depressurizes the second airbag through the first airbag and the injection tube, thus ensuring that the spraying action occurs before the complete depressurization of the second airbag.

[0015] 3. This application establishes different gas flow paths between the first and second airbags during the injection and degassing phases by setting a one-way pressure limiting valve and a check valve. The one-way pressure limiting valve controls the supply of gas from the first airbag to the second airbag, while the check valve releases pressure from the second airbag to the first airbag when the pressure in the second airbag is higher than that in the first airbag. This ensures that the second airbag forms a seal against the inner wall of the airway while maintaining a certain sealing state in the initial stage of degassing, providing a time window for the liquid to be sprayed out and distributed.

[0016] 4. This application provides a locking component for locking and sealing the piston rod by setting a valve core in the self-sealing interface. When the external gas injection and extraction device opens the self-sealing interface, the locking of the piston rod can be released, creating a gap for gas to pass through. After the external gas injection and extraction device is disengaged, the piston rod can be locked again, blocking the connection between the self-sealing interface and the connection port. This helps to improve the positional stability of the piston rod in the non-operating state, and also helps to improve the sealing reliability of the gas path and the stability of the overall working process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an endotracheal tube with a spraying function.

[0018] Figure 2 for Figure 1 A magnified structural diagram of region A in the middle.

[0019] Figure 3 for Figure 1 A magnified structural diagram of region B in the middle.

[0020] In the attached diagram: 100, cannula body; 110, air injection tube; 111, air injection port; 120, liquid injection tube; 121, liquid injection port; 130, replenishment tube; 131, Luer connector; 200, first airbag; 300, second airbag; 310, ring plate; 320, one-way pressure relief valve; 330, perforation; 340, check valve; 341, fixing part; 342, valve plate; 343, assembly part; 400, outer ring; 410, spray nozzle; 420, annular liquid chamber; 500, shell. 510. Partition plate; 520. Drive chamber; 521. First piston; 522. Connection port; 523. First vent; 530. Liquid storage chamber; 531. Second piston; 532. Second check valve interface; 533. First check valve interface; 534. Second vent; 540. Piston rod; 550. Elastic element; 560. Self-sealing interface; 570. Locking assembly; 571. Unlocking push rod; 572. Conical plug; 573. Sleeve; 574. Elastic expansion sleeve; 575. Conical surface. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the following description is provided in conjunction with the appendix. Figures 1-3 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] like Figure 1 , Figure 2 and Figure 3As shown, an endotracheal cannula with a spraying function includes: a cannula body 100, a first airbag 200 and a second airbag 300 arranged axially on the outer wall of the cannula body 100, an annular plate 310 connecting the first airbag 200 and the second airbag 300, an inflation tube 110 connected to the first airbag 200, the first airbag 200 communicating with the inflation tube 110, and a one-way pressure relief valve 320 and a check valve 340 installed on the annular plate 310; An outer ring 400 is fixedly disposed on the outer periphery of the cannula body 100, and the outer ring 400 has a spray nozzle 410 for spraying out the medicine; a shell 500 is disposed outside the cannula body 100, and a partition 510 is fixedly disposed inside the shell 500, the partition 510 dividing the interior of the shell 500 into a driving chamber 520 and a liquid storage chamber 530; a first piston 521 and an elastic element 550 are disposed in the driving chamber 520 of the shell 500. The piston 521 is pressed against the inner wall of the drive chamber 520. The two ends of the elastic element 550 are respectively fixedly connected to the partition plate 510 on one side of the drive chamber 520 and the first piston 521. The elastic element 550 is a compression spring. The drive chamber 520 of the housing 500 is equipped with a self-sealing interface 560 for docking with an external air injection and extraction device. The liquid storage chamber 530 of the housing 500 is provided with a second piston 531 pressed against the inner wall of the liquid storage chamber 530. The two sides of the liquid storage chamber 530 are respectively connected to a second one-way valve interface 532 and a first one-way valve interface 533. The second one-way valve interface 532 is used to communicate with the outer ring 400, and the first one-way valve interface 533 is used to communicate with an external liquid source. A piston rod 540 is connected between the second piston 531 and the first piston 521. The piston rod 540 is a hollow structure. The lower end of the piston rod 540 is equipped with a connection port 522 for communicating with the air injection pipe 110. The thickness of the ring plate 310 is 2-5 mm. Multiple spray nozzles 410 are provided and are evenly distributed on the outer ring 400.

[0023] During intubation, the external air injection / evacuation device injects air into the drive chamber 520 through the self-sealing interface 560. The gas pushes the first piston 521 to compress the elastic element 550 to store energy. Simultaneously, it enters the first airbag 200 through the piston rod 540, the connection port 522, and the air injection tube 110. When the pressure inside the first airbag 200 reaches a preset value, the one-way pressure relief valve 320 opens, allowing gas to enter the second airbag 300, causing it to expand and seal against the inner wall of the airway. Simultaneously, the first piston 521 moves the second piston 531 via the piston rod 540, changing the volume of the liquid storage chamber 530. The medication enters the liquid storage chamber 530 through the replenishment tube 130 and the first one-way valve interface 533 to complete the aspiration process. When spraying and depressurizing are required, the external air injection and extraction device extracts air from the drive chamber 520. The elastic element 550 releases its stored energy, pushing the first piston 521 to move in the opposite direction, which in turn drives the second piston 531 to move in the opposite direction and squeeze the liquid medicine. The liquid medicine enters the outer ring 400 through the second one-way valve interface 532, the injection pipe 120 and the injection port 121, and then is sprayed out from the spray nozzle 410 through the annular liquid medicine chamber 420. At the same time, the first airbag 200 is depressurized first, and the spraying action starts before the second airbag 300 is completely depressurized. When the pressure inside the second airbag 300 is greater than the pressure inside the first airbag 200, the check valve 340 opens, and the gas inside the second airbag 300 enters the first airbag 200 through the check valve 340 and is discharged.

[0024] This embodiment achieves linkage between the spraying process and the inflation / deflation process of the airbag by setting up the driving cavity 520 and the liquid storage cavity 530 inside the housing 500, combined with the linkage of the first piston 521, the second piston 531 and the elastic element 550, so as to accurately control the timing of drug administration and avoid errors in manual operation. Multiple spray nozzles 410 are evenly distributed on the outer ring 400, so that the liquid can be evenly sprayed in the airway, improving the drug effect. The setting of the first airbag 200 and the second airbag 300, as well as the cooperation of the one-way pressure limiting valve 320 and the check valve 340, ensure the sealing effect of the airway, and at the same time, the spraying action occurs before the second airbag 300 is completely depressurized, providing time for the liquid to take effect.

[0025] like Figure 1 As shown, the lower end of the air injection pipe 110 is provided with an air injection port 111, which is located inside the first airbag 200; the second one-way valve interface 532 is connected to a liquid injection pipe 120, and the end of the liquid injection pipe 120 away from the second one-way valve interface 532 is connected to the outer ring 400; the lower end of the liquid injection pipe 120 is provided with a liquid injection port 121, which is located inside the outer ring 400; the first one-way valve interface 533 is connected to a liquid replenishment pipe 130, and a Luer interface 131 is installed at the end of the liquid replenishment pipe 130. The first one-way valve interface 533 is connected to an external liquid source through the liquid replenishment pipe 130 and the Luer interface 131.

[0026] The air inlet 111 at the lower end of the air inlet tube 110 accurately injects gas into the first airbag 200, ensuring the normal inflation of the first airbag 200. The liquid injection tube 120 connected to the second one-way valve interface 532 transports the liquid medicine in the storage chamber 530 to the outer ring 400. The liquid injection port 121 ensures that the liquid medicine smoothly enters the annular liquid medicine chamber 420 in the outer ring 400. The replenishment tube 130 connected to the first one-way valve interface 533 is connected to an external liquid source through the Luer interface 131 to realize the replenishment of the liquid medicine.

[0027] In this embodiment, the air injection port 111 is located inside the first airbag 200, allowing gas to be directly injected into the first airbag 200, improving inflation efficiency and accuracy. The liquid injection tube 120 and the liquid injection port 121 ensure that the liquid can be stably and accurately delivered to the outer ring 400, avoiding liquid leakage. The use of the Luer interface 131 facilitates connection with an external liquid source, making operation simple and quick, while ensuring the sealing of the connection.

[0028] like Figure 2 As shown, a first air hole 523 is provided on the lower side of the drive cavity 520 of the housing 500, and a second air hole 534 is provided at the lower end of the liquid storage cavity 530. The first air hole 523 and the second air hole 534 are used to balance the air pressure during the movement of the first piston 521 and the second piston 531, respectively. The diameter of the second air hole 534 is larger than the outer diameter of the air injection pipe 110.

[0029] During the movement of the first piston 521 and the second piston 531, the first vent 523 and the second vent 534 respectively achieve air pressure balance in the drive chamber 520 and the liquid storage chamber 530, ensuring the normal movement of the pistons; the diameter of the second vent 534 is larger than the outer diameter of the air injection pipe 110, so as to avoid the air injection pipe 110 affecting the air pressure balance function of the second vent 534.

[0030] The design of the first vent 523 and the second vent 534 makes the piston move more smoothly, reduces resistance, and improves the working efficiency of the device. The reasonable design of the diameter of the second vent 534 ensures the normal realization of the air pressure balance function, while avoiding mutual interference with the air injection pipe 110.

[0031] like Figure 1 As shown, the outer ring 400 is fixedly disposed on the outer periphery of the cannula body 100, and an annular liquid cavity 420 is formed inside the outer ring 400. The injection port 121 is connected to the annular liquid cavity 420, and the spray port 410 is connected to the annular liquid cavity 420.

[0032] The outer ring 400 is fixed to the outer periphery of the cannula body 100. The injection port 121 injects the drug solution into the annular drug solution cavity 420. The drug solution is evenly distributed in the annular drug solution cavity 420 and then sprayed out through multiple spray ports 410 to achieve uniform drug spraying to the airway.

[0033] The annular liquid chamber 420 ensures uniform distribution of the liquid, guaranteeing a consistent amount of liquid sprayed from multiple nozzles 410 and enhancing the drug's effectiveness. The fixed outer ring 400 ensures the stability of the spraying process and prevents displacement of the outer ring 400 during spraying.

[0034] like Figure 3 As shown, the check valve 340 includes: a fixing part 341 and a valve plate 342, the valve plate 342 being installed on one side of the fixing part 341; the annular plate 310 has a through hole 330, and a connecting part 343 is installed on the side of the annular plate 310 near the first airbag 200 and adjacent to the through hole 330, the fixing part 341 being installed on the connecting part 343, and the valve plate 342 being located at the through hole 330 to block the through hole 330.

[0035] During the inflation phase, gas first enters the first airbag 200. When the pressure inside the first airbag 200 reaches the preset pressure, the one-way pressure relief valve 320 opens, and gas enters the second airbag 300. During the deflation phase, the first airbag 200 is depressurized first. When the pressure inside the second airbag 300 is greater than the pressure inside the first airbag 200, the check valve 340 opens, and the gas inside the second airbag 300 enters the first airbag 200 through the check valve 340 and is then discharged.

[0036] The cooperation of the one-way pressure relief valve 320 and the check valve 340 enables reasonable gas flow between the first airbag 200 and the second airbag 300, ensuring the sealing effect of the airway. At the same time, it ensures that the spraying action occurs before the second airbag 300 is completely depressurized, providing time for the liquid to take effect. The structural design of the check valve 340 ensures that gas can only flow from the second airbag 300 to the first airbag 200, preventing gas backflow.

[0037] like Figure 2 As shown, the self-sealing interface 560 includes a valve core and a spring for driving the valve core to reset. The lower end of the valve core is connected to a locking assembly 570 for locking and sealing the piston rod 540. The locking assembly 570 includes: an unlocking push rod 571 connected to the lower end of the valve core; a tapered plug 572 fixedly connected to the lower end of the unlocking push rod 571; a sleeve 573 provided on the outside of the unlocking push rod 571, the sleeve 573 passing through the piston rod 540; an elastic expansion sleeve 574 connected to the lower end of the sleeve 573; and a tapered surface 575 at the bottom end of the elastic expansion sleeve 574 that mates with the tapered plug 572.

[0038] When the external air injection / extraction device opens the self-sealing interface 560, the valve core drives the unlocking push rod 571 to move downward, the conical plug 572 disengages from the conical surface 575 of the elastic expansion sleeve 574, and the elastic expansion sleeve 574 releases its lock on the piston rod 540. At the same time, a gap is formed between the conical plug 572 and the elastic expansion sleeve 574 to allow gas to pass through. After the external air injection / extraction device disengages from the self-sealing interface 560, the valve core resets under the action of the spring and drives the unlocking push rod 571 to move upward, so that the conical plug 572 and the conical surface 575 of the elastic expansion sleeve 574 re-engage. The elastic expansion sleeve 574 locks the piston rod 540 and blocks the connection between the self-sealing interface 560 and the connection port 522.

[0039] The locking component 570 ensures the positional stability of the piston rod 540 in the non-operating state and prevents the piston rod 540 from moving unexpectedly. The design of the self-sealing interface 560 can automatically block the air passage after the external air injection and extraction device is disconnected, which improves the sealing reliability of the air passage and the stability of the overall working process.

[0040] Working principle: During cannulation, the external air injection / evacuation device injects air into the drive chamber 520 through the self-sealing interface 560. When the external air injection / evacuation device opens the self-sealing interface 560, the valve core drives the unlocking push rod 571 to move downward, the conical plug 572 disengages from the conical surface 575 of the elastic expansion sleeve 574, the elastic expansion sleeve 574 releases its lock on the piston rod 540, and at the same time, a gap is formed between the conical plug 572 and the elastic expansion sleeve 574 to allow gas to pass through. The injected gas acts on two fronts: firstly, it pushes the first piston 521, causing it to move and compress the elastic element 550, thus putting the elastic element 550 into an energy storage state; secondly, the gas enters the first airbag 200 through the internal channel of the piston rod 540, the connection port 522, and the gas injection pipe 110. After the first airbag 200 is inflated, when the pressure inside the first airbag 200 reaches the preset pressure, the one-way pressure relief valve 320 opens, allowing the gas inside the first airbag 200 to enter the second airbag 300. The second airbag 300 expands and adheres to the inner wall of the air passage, thereby achieving a seal. Simultaneously, the first piston 521 drives the second piston 531 to move through the piston rod 540, causing a change in the volume of the liquid storage chamber 530. The liquid medicine enters the liquid storage chamber 530 through the replenishment pipe 130 and the first one-way valve interface 533, thus completing the liquid absorption. When spraying and degassing are required, the external gas injection and degassing device evacuates the drive chamber 520 through the self-sealing interface 560. At this time, the air pressure acting on the first piston 521 in the drive chamber 520 decreases, the aforementioned energy-stored elastic element 550 releases its stored energy and pushes the first piston 521 to move in the opposite direction. The first piston 521 drives the second piston 531 to move in the opposite direction through the piston rod 540, thereby squeezing the liquid medicine in the storage chamber 530. The liquid medicine enters the outer ring 400 through the second one-way valve interface 532, the injection pipe 120 and the injection port 121, and finally enters the annular liquid medicine chamber 420 and is sprayed out from the spray nozzle 410. At the same time, the first airbag 200 depressurizes before the second airbag 300, so that the spraying action starts before the second airbag 300 is completely depressurized. When the pressure in the second airbag 300 is greater than the pressure in the first airbag 200, the check valve 340 opens, and the gas in the second airbag 300 enters the first airbag 200 through the check valve 340 and is discharged through the air injection pipe 110, thereby delaying the depressurization of the second airbag 300. Since the drug inhalation in this embodiment can be completed in advance during the inflation phase, while the spraying action occurs during the depressurization phase, and the spraying action occurs before the complete depressurization of the second airbag 300, the spraying process and the airbag inflation and deflation process can be linked, which helps to improve the timing of drug administration. After the external inflation and depressurization device disengages from the self-sealing interface 560, the valve core resets under the action of the spring and drives the unlocking push rod 571 to move upward, so that the conical plug 572 and the conical surface 575 of the elastic expansion sleeve 574 re-engage, thereby locking the piston rod 540 with the elastic expansion sleeve 574 and blocking the communication between the self-sealing interface 560 and the connection port 522. This helps to avoid unexpected movement of the piston rod 540 in the non-operating state and reduces the risk of gas miscommunication, making the overall working state more stable.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are similarly included within the protection scope of the present invention.

Claims

1. A endotracheal tube with a spraying function, comprising a tube body (100), characterized in that, The outer wall of the cannula body (100) is provided with a first airbag (200) and a second airbag (300) arranged axially. A ring plate (310) is connected between the first airbag (200) and the second airbag (300). An inflation tube (110) is connected to the first airbag (200). The first airbag (200) is connected to the inflation tube (110). A one-way pressure relief valve (320) and a check valve (340) are installed on the ring plate (310). An outer ring (400) is fixedly provided on the outer periphery of the cannula body (100), and a spray nozzle (410) for spraying out the medicine is provided on the outer ring (400). The cannula body (100) is provided with a housing (500) on the outside, and a partition (510) is fixedly provided inside the housing (500). The partition (510) divides the inside of the housing (500) into a driving chamber (520) and a liquid storage chamber (530). The drive cavity (520) of the housing (500) is provided with a first piston (521) and an elastic element (550). The first piston (521) is close to the inner wall of the drive cavity (520). The two ends of the elastic element (550) are respectively fixedly connected to the partition plate (510) on one side of the drive cavity (520) and the first piston (521). The drive cavity (520) of the housing (500) is equipped with a self-sealing interface (560) for docking with an external air injection and extraction device. The housing (500) has a second piston (531) installed in the liquid storage chamber (530) that is close to the inner wall of the liquid storage chamber (530). The liquid storage chamber (530) is connected to a second one-way valve interface (532) and a first one-way valve interface (533) on both sides respectively. The second one-way valve interface (532) is used to communicate with the outer ring (400), and the first one-way valve interface (533) is used to communicate with the external liquid source. A piston rod (540) is connected between the second piston (531) and the first piston (521). The piston rod (540) is a hollow structure. The lower end of the piston rod (540) is equipped with a connection port (522) for communicating with the air injection pipe (110).

2. The endotracheal tube with spraying function according to claim 1, characterized in that, An air injection port (111) is provided at the lower end of the air injection tube (110), and the air injection port (111) is located inside the first airbag (200); The second check valve port (532) is connected to a liquid injection pipe (120), and the end of the liquid injection pipe (120) away from the second check valve port (532) is connected to the outer ring (400); The lower end of the injection tube (120) is provided with an injection port (121), which is located inside the outer ring (400); The first one-way valve interface (533) is connected to a replenishment pipe (130), and a Luer interface (131) is installed at the end of the replenishment pipe (130). The first one-way valve interface (533) is connected to an external liquid source through the replenishment pipe (130) and the Luer interface (131).

3. The endotracheal tube with spraying function according to claim 1, characterized in that, The drive chamber (520) of the housing (500) has a first air hole (523) on the lower side, and the liquid storage chamber (530) has a second air hole (534) at the lower end. The first air hole (523) and the second air hole (534) are used to balance the air pressure during the movement of the first piston (521) and the second piston (531), respectively. The diameter of the second air hole (534) is larger than the outer diameter of the air injection pipe (110).

4. The endotracheal tube with spraying function according to claim 2, characterized in that, The outer ring (400) is fixedly disposed on the outer periphery of the cannula body (100). An annular liquid cavity (420) is provided inside the outer ring (400). The injection port (121) is connected to the annular liquid cavity (420). The spray port (410) is connected to the annular liquid cavity (420).

5. A tracheal intubation tube with a spraying function according to claim 1, characterized in that, The check valve (340) includes: The fixing part (341) and the valve plate (342) are mounted on one side of the fixing part (341); The ring plate (310) has a perforation (330). A connecting part (343) is installed on the side of the ring plate (310) close to the first airbag (200) and adjacent to the perforation (330). The fixing part (341) is installed on the connecting part (343). The valve plate (342) is located at the perforation (330) to block the perforation (330).

6. The endotracheal tube with spraying function according to claim 1, characterized in that, The elastic element (550) is a compression spring.

7. A tracheal tube with a spraying function according to claim 1, characterized in that, The self-sealing interface (560) includes a valve core and a spring for driving the valve core to reset, and the lower end of the valve core is connected to a locking assembly (570) for locking and sealing the piston rod (540).

8. A tracheal intubation tube with a spraying function according to claim 7, characterized in that, The locking assembly (570) includes: The unlocking push rod (571) is connected to the lower end of the valve core. A tapered plug (572) is fixedly connected to the lower end of the unlocking push rod (571). A sleeve (573) is provided on the outside of the unlocking push rod (571), and the sleeve (573) passes through the piston rod (540). The lower end of the sleeve (573) is connected to an elastic expansion sleeve (574), and the bottom end of the elastic expansion sleeve (574) is provided with a conical surface (575) that mates with the conical plug (572).

9. A tracheal tube with a spraying function according to claim 1, characterized in that, The thickness of the ring plate (310) is 2~5mm.

10. A tracheal tube with a spraying function according to claim 1, characterized in that, The spray nozzle (410) has multiple openings and is evenly distributed on the outer ring (400).

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