A negative pressure sputum suction device with humidification function is used for a patient with inhalation injury

Abstract

The application discloses a negative pressure sputum suction device with a humidification function for a patient with an inhalation injury, which comprises an inner tube component and an outer tube component. The inner tube component comprises an inner tube body and an air bag, and the inner tube body is internally provided with an air filling channel and an oxygen supply channel which are communicated with the air bag, and the air bag blocks the airway by air injection. The outer tube component comprises an outer tube body and a traction rope, and the outer tube body is internally provided with an embedding channel, a liquid injection channel and a suction channel. The outer tube body is sequentially divided into a nozzle tube segment, an adsorption tube segment, a deformation tube segment and a support tube segment. The nozzle tube segment is provided with a spray hole which is communicated with the liquid injection channel. The adsorption tube segment is provided with a sputum suction port which is communicated with the suction channel. The deformation tube segment is made of a film material. One end of the traction rope is connected with the adsorption tube segment, and the other end of the traction rope extends along the oxygen supply channel. The traction rope is tightened to compress the deformation tube segment and to make the nozzle tube segment away from the air bag. The traction rope is loosened, and the liquid injection amount is greater than the spray amount. The deformation tube segment is restored to reset the nozzle tube segment. The reciprocating movement of the nozzle tube segment improves the uniformity of humidification.

Description

Technical Field

[0001] This invention relates to the field of negative pressure suctioning technology, and in particular to a negative pressure suctioning device with humidification function for use by patients with inhalation injury. Background Technology

[0002] Inhalation injury refers to damage to the respiratory tract and even the lung parenchyma caused by the inhalation of hot air, smoke, or chemical substances. In such patients, the airway mucosa is often congested and edematous after injury, with damaged or even sloughed mucosal epithelium, and the secretion of large amounts of thick sputum and exudate. Some of the sputum dries and forms crusts that adhere to the airway walls. If these secretions are not cleared in time, they can easily obstruct the airway, affect ventilation, and lead to secondary infections. Therefore, patients with inhalation injury require repeated suctioning to maintain airway patency.

[0003] Currently, negative pressure suction devices are commonly used in clinical practice to clear sputum from patients' airways. The basic method involves inserting a suction tube into the patient's airway through the mouth, nose, or an artificial airway, and using an external negative pressure source to generate suction to remove the sputum from the airway.

[0004] However, the sputum of patients with inhalation injury is usually quite viscous, and some of it may even dry and form crusts that adhere to the airway mucosa. To suction out such viscous sputum or crusts, a large negative pressure suction force is often required. However, a large suction force will directly act on the airway mucosa. For patients with inhalation injury whose mucosa is already damaged, excessive suction force can easily adsorb and pull on the mucosa along with the crusts attached to it, causing secondary damage to the mucosa and thus aggravating the patient's condition. To reduce the viscosity of sputum, existing techniques include dripping or injecting humidifying fluid into the airway before suctioning. However, once the humidifying fluid enters the airway, it flows down the posterior wall of the airway under gravity. On the one hand, the humidifying fluid is difficult to distribute evenly in different segments of the airway, and cannot adequately dilute the viscous sputum and crusts adhering to the anterior and lateral walls of the airway, resulting in uneven humidification. On the other hand, excess humidifying fluid can easily accumulate in the lower airway or even flow into the lungs, easily irritating the airway and causing the patient to cough, and may also increase the risk of lung infection.

[0005] Therefore, improving the uniformity of airway humidification during suctioning while avoiding excess humidification fluid from flowing into the lower airway and causing discomfort or infection is a technical problem that urgently needs to be solved in the current technology. Summary of the Invention

[0006] The purpose of this invention is to address the existing problems in suctioning treatment regarding how to improve the uniformity of airway humidification while preventing excess humidification fluid from flowing into the lower airway and causing discomfort or infection, by providing a negative pressure suctioning device with humidification function for patients with inhalation injury.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A negative pressure suction device with humidification function for use in patients with inhalation injury includes an inner tube component and an outer tube component, the outer tube component being sleeved on the outside of the inner tube component; The inner tube component includes an inner tube body and an air bag. The air bag is located at the end of the inner tube body that extends into the trachea. The inner tube body is provided with an inflation channel and an oxygen supply channel. The inflation channel is connected to the air bag. Gas is injected into the air bag through the inflation channel to make it expand and block the patient's airway. The oxygen supply channel is used to form an oxygen supply path after the patient's airway is blocked, to maintain the patient's oxygen needs. The outer tube component includes an outer tube body and a traction rope. The outer tube body is provided with an interlocking channel, an injection channel and a suction channel. The interlocking channel is used for the inner tube body to pass through, the injection channel is used to inject humidifying liquid, and the suction channel is used to form a negative pressure suction passage for suctioning out sputum. The outer tube is divided into a nozzle section, an adsorption section, a deformable section, and a support section from the end that extends into the trachea to the end outside the body. The nozzle section has multiple nozzles on its periphery that atomize the humidifying liquid, and all nozzles are connected to the injection channel. The adsorption section is connected to the suction channel and has a suction port. Under negative pressure, sputum and excess humidifying liquid that has not been absorbed are drawn into the suction channel through the suction port on the adsorption section and discharged from the body. The deformable tube section is made of thin film material; one end of the traction rope is connected to the adsorption tube section, and the other end is inserted into the inner tube body and extends out of the outer end of the inner tube body along the oxygen supply channel; When the traction rope is tightened, the deformable tube section can be compressed and deformed, allowing the nozzle tube section to move away from the airbag along the axial direction of the inner tube. When the traction rope is relaxed, and the amount of humidifying liquid injected through the injection channel is greater than the amount sprayed from the nozzle, the deformable tube section recovers and extends under the pressure of the humidifying liquid, allowing the nozzle tube section to move back to its original position along the axial direction of the inner tube towards the airbag.

[0008] Preferably, a limit stop is provided on the inner tube body, and a magnetic block is provided on the end face of the nozzle pipe section facing the airbag. After the magnetic block is attracted to the limit stop, the axial displacement between the inner tube body and the outer tube body is locked.

[0009] Preferably, the inner tube body includes a sliding inner tube section and a limiting inner tube section connected along the axial direction, the airbag is disposed on the limiting inner tube section, and the diameter of the limiting inner tube section is larger than the diameter of the sliding inner tube section; The adsorption tube section includes a main tube section and a branch tube section. The main tube section is sleeved on the sliding inner tube section. The main tube section is connected to the nozzle tube section through a bridge pipe. The nozzle tube section and the main tube section are spaced apart, and the width of the gap between them is greater than the length of the branch tube section. The branch tube section is made of elastic rubber material. One end of the branch tube section is connected to the main tube section, and the other end is provided with the suction port. The tube wall of the branch tube section is provided with a through groove that penetrates through it. The opening width of the through groove is greater than the diameter of the sliding inner tube section and smaller than the diameter of the limiting inner tube section. The main pipe section and the branch pipe section have a first fitting mode and a second fitting mode, and can switch from the first fitting mode to the second fitting mode as the nozzle pipe section moves axially relative to the inner pipe body; In the first fitting configuration, the branch pipe section is sleeved on the limiting inner pipe section, and the main pipe section is sleeved on the sliding inner pipe section; In the second mating configuration, the nozzle pipe section is located on the sliding inner pipe section, the main pipe section is sleeved on the sliding inner pipe section, and the branch pipe section deflects away from the inner pipe body under the action of its own elastic restoring force. The branch pipe section passes over the sliding inner pipe section through the groove, and the central axis of the branch pipe section and the central axis of the main pipe section form an obtuse angle fit.

[0010] Preferably, the sliding inner pipe section and the limiting inner pipe section are rotatably connected, and the sliding inner pipe section and the main pipe section are circumferentially limited and axially sliding.

[0011] Preferably, the surface of the airbag that contacts the patient's airway is roughened.

[0012] Preferably, the diameter of the fitting channel inside the support pipe segment matches the diameter of the corresponding inner pipe segment.

[0013] Preferably, a turntable is provided on one side of the outer end of the inner tube, the turntable being used to increase the contact area between the operator's hand and the inner tube.

[0014] Preferably, a traction sleeve is provided at the outer end of the inner tube, and the traction sleeve is threadedly connected to the inner tube. One end of the traction rope extending out of the inner tube is connected to the top of the traction sleeve. When the traction sleeve is rotated, the traction sleeve moves axially relative to the inner tube, thereby tightening or loosening the traction rope. The top of the traction sleeve is also provided with a nozzle for connecting to an external oxygen source.

[0015] Preferably, the traction rope and the top of the traction sleeve are rotatably connected.

[0016] Preferably, a plurality of elastic support columns are further provided in the injection channel and the suction channel inside the deformable pipe section, the elastic support columns being used to prevent the flow cross section of the injection channel and the suction channel from collapsing.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention provides a negative pressure suction device with humidification function for patients with inhalation injury. With the cooperation of the traction rope and the deformable tube section, the nozzle tube section can reciprocate along the axial direction of the inner tube, so that the humidifying liquid can act evenly on the anterior, lateral, and posterior walls of the airway. Compared with the existing technology of directly dripping humidifying liquid, the humidification coverage is wider and the humidification uniformity is better. It can more fully dilute the viscous sputum and sputum crusts in various parts of the airway, making it easier to suction out later. At the same time, by setting the air bladder at the end of the inner tube that extends into the trachea, the air bladder expands before the suction operation to block the airway. During the spraying process, the excess humidifying liquid that is not absorbed by the sputum is blocked by the air bladder and cannot continue to flow down the airway. Moreover, this excess humidifying liquid is sucked into the suction channel through the suction port and discharged from the body, effectively avoiding the humidifying liquid irritating the airway and causing coughing, and also reducing the risk of lung infection. 2. The negative pressure suction device with humidification function for patients with inhalation injury described in this invention, during the intubation stage, the branch tube segment is sleeved on the limiting inner tube segment whose diameter is larger than the width of the through slot opening. It is radially constrained and supported by the limiting inner tube segment to maintain a first fitting form that is collinear with the main tube segment. In this state, the overall outer contour of the suction tube segment is straight, which facilitates smooth insertion into the airway and avoids unnecessary damage caused by the branch tube segment lifting up and scraping the airway mucosa during the intubation process. During the wet operation, the adsorption tube section moves away from the airbag under the traction rope, and the branch tube section moves to the section where the sliding inner tube section is located. The radial constraint is released, and the branch tube section deflects away from the inner tube body under the action of its own elastic restoring force. The branch tube section and the main tube section form a second cooperation mode. In this state, the suction port set at the end of the branch tube section faces and is close to the tracheal wall, which is more conducive to adsorbing the sputum attached to the tracheal wall and improving the thoroughness and efficiency of sputum suction. When the nozzle section is reset, the main pipe section and the branch pipe section maintain a second mating configuration. After being reset, the end of the branch pipe section falls into the humidification fluid accumulation area of ​​the airbag. After the negative pressure is turned on, the accumulated humidification fluid can be directly and thoroughly sucked into the suction channel through the suction port and discharged from the body, further preventing excess humidification fluid from entering the lower airway or lungs and improving the safety of the device. In addition, during the adsorption operation, the magnetic block is adsorbed on the limiting block, preventing the outer tube from moving and ensuring that the branch pipe section can be stably maintained at the humidification fluid accumulation position, further improving the removal effect of excess humidification fluid. 3. The negative pressure suction device with humidification function for patients with inhalation injury described in this invention, in which the branch tube section and the main tube section form a second cooperation form to perform the suction of sputum and excess humidification fluid, the operator rotates the inner tube body outside the body. The torque of the rotation of the inner tube body is transmitted to the main tube section, causing the nozzle tube section and the suction tube section to rotate synchronously. During this process, the branch tube section close to the tracheal wall sweeps along the circumferential direction of the tracheal inner wall as it rotates, and can sequentially suction the sputum accumulated at different locations around the tracheal wall. In addition, during the suction operation, the traction rope drives the suction tube section to move back and forth along the axial direction of the sliding inner tube section, which can make the effective suction range cover the entire inner wall surface of the airway, further improving the sputum clearance effect. Furthermore, the adsorption tube segment and the support tube segment are connected by a deformable tube segment made of a thin film material. This deformable tube segment is soft and lacks the rigidity to effectively transmit torque. When the adsorption tube segment rotates, the deformable tube segment undergoes torsional deformation to absorb the rotation, thus preventing the support tube segment from rotating and keeping it stationary relative to the patient's upper airway. For patients with inhalation injuries where upper airway damage is more severe than lower airway damage, the support tube segment corresponding to the upper airway does not experience rotational friction with the upper airway mucosa during the entire rotational adsorption process, avoiding further damage to the upper airway caused by rotational operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a negative pressure suction device with humidification function for use by patients with inhalation injury; Figure 2 yes Figure 1 A schematic diagram of the structure of A in the middle; Figure 3 This is a schematic diagram of the cross-sectional structure of the inner and outer pipe bodies adsorbed and fixed together in the first fitting state between the main pipe section and the branch pipe section. Figure 4 yes Figure 3 A schematic diagram of B in the middle; Figure 5This is a schematic diagram of the structure when the deformable pipe section is compressed and deformed under the state of tensioning rope, and the main pipe section and the branch pipe section form a second fit mode. Figure 6 This is a schematic diagram of the cross-sectional structure of the inner and outer pipe bodies adsorbed and fixed together in the second fitting mode between the main pipe section and the branch pipe section. Figure 7 This is a schematic diagram of the circumferential limiting and axial sliding fit between the sliding inner pipe section and the main pipe section; Figure 8 This is a schematic diagram of the structure where the branch pipe section is fitted onto the inner limiting pipe section.

[0019] The markings in the diagram are: 1-Inner tube component, 2-Outer tube component, 3-Inner tube body, 4-Airbag, 5-Inflation channel, 6-Oxygen supply channel, 7-Outer tube body, 8-Traction rope, 9-Interlocking channel, 10-Injection channel, 11-Suction channel, 12-Nozzle section, 13-Adsorption section, 14-Deformable section, 15-Support section, 16-Suction port, 17-Limiting block, 18-Magnetic block, 19-Sliding inner tube section, 20-Limiting inner tube section, 21-Main tube section, 22-Branch section, 23-Bridge pipe, 24-Channel, 26-Turntable, 27-Traction sleeve, 28-Air nozzle, 29-Elastic support column. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] Example 1: As Figures 1 to 6 As shown, the present invention provides a negative pressure suction device with humidification function for patients with inhalation injury, comprising an inner tube component 1 and an outer tube component 2, wherein the outer tube component 2 is sleeved on the outside of the inner tube component 1; The inner tube component 1 includes an inner tube body 3 and an air bag 4. The air bag 4 is located at one end of the inner tube body 3 that extends into the trachea. The inner tube body 3 is provided with an inflation channel 5 and an oxygen supply channel 6. The inflation channel 5 is connected to the air bag 4. Gas is injected into the air bag 4 through the inflation channel 5 to make it expand and block the patient's airway. The oxygen supply channel 6 is used to form an oxygen supply path after the patient's airway is blocked, to maintain the patient's oxygen needs. The outer tube component 2 includes an outer tube body 7 and a traction rope 8. The outer tube body 7 is provided with a fitting channel 9, an injection channel 10 and a suction channel 11. The fitting channel 9 is used for the inner tube body 3 to pass through, the injection channel 10 is used to inject humidifying liquid, and the suction channel 11 is used to form a negative pressure suction passage for suctioning out sputum. The outer tube 7 is divided into a nozzle section 12, an adsorption section 13, a deformable section 14, and a support section 15 from the end that extends into the trachea to the end outside the body. The nozzle section 12 is provided with a plurality of nozzle holes on its periphery to atomize the humidifying liquid. All nozzle holes are connected to the injection channel 10. The adsorption section 13 is connected to the suction channel 11. The adsorption section 13 is provided with a suction port 16. Under negative pressure, sputum and excess humidifying liquid that has not been absorbed are sucked into the suction channel 11 through the suction port 16 on the adsorption section 13 and discharged from the body. The deformable tube section 14 is made of thin film material; one end of the traction rope 8 is connected to the adsorption tube section 13, and the other end is inserted into the inner tube body 3 and extends out of the outer end of the inner tube body 3 along the oxygen supply channel 6. When the traction rope 8 is tightened, the deformable tube section 14 can be compressed and deformed, so that the nozzle tube section 12 can move away from the airbag 4 along the axial direction of the inner tube 3. When the traction rope 8 is relaxed, and the amount of humidifying liquid injected through the injection channel 10 is greater than the amount sprayed from the nozzle, the deformable tube section 14 will recover and extend under the pressure of the humidifying liquid, so that the nozzle tube section 12 can move closer to the airbag 4 along the axial direction of the inner tube 3 and reset.

[0023] The negative pressure suction device with humidification function for patients with inhalation injury described in this invention allows the nozzle section 12 to reciprocate along the axial direction of the inner tube 3 in cooperation with the traction rope 8 and the deformable tube section 14. This enables the humidifying liquid to act evenly on the anterior, lateral, and posterior walls of the airway. Compared with the existing technology of directly dripping humidifying liquid, this method provides a wider humidification coverage and better uniformity, and can more effectively dilute viscous sputum and sputum crusts in various parts of the airway, facilitating subsequent suctioning. At the same time, by setting the airbag 4 at the end of the inner tube 3 that extends into the trachea, the airbag 4 inflates to block the airway before suctioning. During the spraying process, excess humidifying liquid that is not absorbed by the sputum is blocked by the airbag 4 and cannot continue to flow down the airway. Moreover, this excess humidifying liquid is sucked into the suction channel 11 through the suction port 16 and discharged from the body, effectively avoiding humidifying liquid irritating the airway and causing coughing, and also reducing the risk of lung infection.

[0024] On the other hand, the axial movement of the nozzle section 12 of the present invention is driven by the tightening of the traction rope 8, and its reset is achieved by the hydraulic drive of the injected humidifying liquid to restore and extend the deformed section 14. There is no need to set an additional driving mechanism in the section that extends into the trachea. The structure is simple and the operation is reliable. Moreover, the reset process is carried out synchronously with the spraying of the humidifying liquid, without adding any additional operation steps, thus improving the ease of use of the negative pressure suction device of the present invention.

[0025] The operating procedure of the device in this embodiment is as follows: Insertion and occlusion: The device is slowly inserted into the trachea through the patient's mouth with the nozzle section 12 facing forward. The air bag 4 is then inserted to the predetermined occlusion position within the airway. At this point, the support section 15 corresponds to the patient's upper respiratory tract, with its external end remaining outside the body. Subsequently, gas is injected into the air bag 4 through the inflation channel 5, causing the air bag 4 to inflate and adhere to the inner wall of the airway, thus occluding the airway. The external end of the oxygen supply channel 6 is connected to an external oxygen source to continuously supply oxygen to the airway, maintaining the patient's oxygen needs throughout the suctioning treatment.

[0026] Piping connection: Connect the external end of the injection channel 10 to the injection device for delivering humidifying fluid, and connect the external end of the suction channel 11 to an external negative pressure source to complete the preparation before suctioning.

[0027] Humidification operation: Humidifying liquid is injected through the injection channel 10. The humidifying liquid is transported to the nozzle tube section 12 and atomized through the nozzle to disperse circumferentially, evenly spraying it onto the airway wall to moisten and dilute the viscous sputum and sputum crusts adhering to the airway wall. While the humidifying liquid is being sprayed, the operator tightens the traction rope 8 externally. The tension of the traction rope 8 acts directly on the adsorption tube section 13, causing the adsorption tube section 13 and the nozzle tube section 12 connected to it to move away from the airbag 4. The deformable tube section 14 is compressed and deformed accordingly. During this process, the humidifying liquid is continuously sprayed onto the airway wall at different positions as the nozzle tube section 12 retracts. When the nozzle section 12 moves to the end of its stroke, the operator loosens the traction rope 8 and increases the injection volume of the humidifying liquid, so that the amount of humidifying liquid injected through the injection channel 10 is greater than the amount sprayed from the nozzle. At this time, the liquid in the injection channel 10 continues to accumulate and the hydraulic pressure increases. The compressed deformed pipe section 14 recovers and extends under the pressure of the humidifying liquid, pushing the nozzle section 12 to move along the axial direction of the inner tube 3 towards the direction close to the airbag 4 to reset. During the reset process, the nozzle continues to spray, atomizing and humidifying the air pipe wall along the way again. By repeatedly tightening and loosening the traction rope 8, the nozzle tube segment 12 moves axially back and forth within the trachea. The atomized humidifying liquid is evenly applied to various length sections of the anterior, lateral, and posterior walls of the airway, achieving thorough and uniform dilution of sputum throughout the entire airway. During the entire spraying process, excess humidifying liquid that is not absorbed by the sputum flows downwards but is blocked by the inflated air bladder 4, preventing it from entering the lower airway and lungs.

[0028] Adsorption procedure: After the sputum is sufficiently diluted and its viscosity reduced, an external negative pressure source is turned on. Under negative pressure, the diluted sputum and any excess humidification fluid are drawn into the suction channel 11 through the suction port 16 and expelled from the body. Because the sputum has been sufficiently diluted, the negative pressure required to suction it out is significantly reduced, avoiding excessive suction that could cause adsorption or traction on damaged airway mucosa. The humidification and adsorption procedures can be performed alternately until all sputum in the airway is cleared.

[0029] Operation complete: Turn off the negative pressure source, extract the gas from the airbag 4 through the inflation channel 5 to deflate it and release the blockage of the airway, and then slowly remove the entire device from the patient's airway.

[0030] Example 2: As Figure 4 and Figure 5 As shown, the present invention provides a negative pressure suction device with humidification function for patients with inhalation injury. In addition to the above-mentioned method, the inner tube 3 is provided with a limiting block 17, and the end face of the nozzle section 12 facing the airbag 4 is provided with a magnetic block 18. After the magnetic block 18 is attracted to the limiting block 17, the axial displacement between the inner tube 3 and the outer tube 7 is locked.

[0031] Specifically, in this embodiment, before tube insertion, the magnetic block 18 is attracted to the limiting block 17. At this time, the axial displacement between the inner tube 3 and the outer tube 7 is locked, and the two maintain a certain relative positional relationship. During the tube insertion process, the inner tube 3 and the outer tube 7 can be sent in as a whole, avoiding relative movement between the two during tube insertion and ensuring the smoothness of the tube insertion operation. When the tube is in place and humidification is required, the operator tightens the traction rope 8. The traction force overcomes the magnetic attraction force, causing the magnetic block 18 to separate from the limiting block 17, and the nozzle tube segment 12 can then move along the axial direction of the inner tube 3. During the resetting operation of the nozzle tube segment 12, the cooperation of the magnetic block 18 and the limiting block 17 ensures that the nozzle tube segment 12 can be accurately reset to the initial tube insertion position each time, avoiding the impact of incomplete resetting on the humidification effect on the airway near the airbag 4 end, and further ensuring the uniformity of airway humidification.

[0032] Example 3: As Figures 3 to 8As shown, the present invention provides a negative pressure suction device with humidification function for patients with inhalation injury. Based on the above method, the inner tube 3 further includes a sliding inner tube section 19 and a limiting inner tube section 20 connected along the axial direction. The airbag 4 is disposed on the limiting inner tube section 20. The diameter of the limiting inner tube section 20 is larger than the diameter of the sliding inner tube section 19. The adsorption tube section 13 includes a main tube section 21 and a branch tube section 22. The main tube section 21 is sleeved on the sliding inner tube section 19. The main tube section 21 is connected to the nozzle tube section 12 through a bridge tube 23. The nozzle tube section 12 and the main tube section 21 are spaced apart, and the width of the gap between them is greater than the length of the branch tube section 22. The branch tube section 22 is made of elastic rubber material. One end of the branch tube section 22 is connected to the main tube section 21, and the other end is provided with the suction port 16. The tube wall of the branch tube section 22 is provided with a through groove 24 that penetrates through it. The opening width of the through groove 24 is greater than the diameter of the sliding inner tube section 19 and smaller than the diameter of the limiting inner tube section 20. The main pipe section 21 and the branch pipe section 22 have a first fitting mode and a second fitting mode, and can switch from the first fitting mode to the second fitting mode as the nozzle pipe section 12 moves axially relative to the inner pipe body 3. In the first fitting configuration, the branch pipe section 22 is sleeved on the limiting inner pipe section 20, and the main pipe section 21 is sleeved on the sliding inner pipe section 19. In the second mating configuration, the nozzle section 12 is located on the sliding inner pipe section 19, the main pipe section 21 is sleeved on the sliding inner pipe section 19, and the branch pipe section 22 deflects away from the inner pipe body 3 under the action of its own elastic restoring force. The branch pipe section 22 passes over the sliding inner pipe section 19 through the groove 24, and the central axis of the branch pipe section 22 and the central axis of the main pipe section 21 form an obtuse angle fit.

[0033] In this embodiment, during the tube placement stage, the branch tube segment 22 is sleeved on the limiting inner tube segment 20 whose diameter is larger than the opening width of the through groove 24. It is radially constrained and supported by the limiting inner tube segment 20 to maintain a first mating form that is collinear with the main tube segment 21. In this state, the overall outer contour of the adsorption tube segment 13 is straight, which facilitates smooth insertion into the airway and avoids unnecessary damage caused by the branch tube segment 22 lifting up and scraping the airway mucosa during the tube placement process. During the wet operation, the adsorption tube section 13 moves away from the airbag 4 under the action of the traction rope 8. The branch tube section 22 moves to the section where the sliding inner tube section 19 is located. The radial constraint is released. Under the action of its own elastic restoring force, the branch tube section 22 deflects away from the inner tube body 3. The branch tube section 22 and the main tube section 21 form a second cooperation mode. In this state, the suction port 16 set at the end of the branch tube section 22 faces and is close to the tracheal wall, which is more conducive to adsorbing the sputum attached to the tracheal wall and improving the thoroughness and efficiency of sputum suction. When the nozzle section 12 is reset, the main pipe section 21 and the branch pipe section 22 maintain a second mating configuration. After being reset, the end of the branch pipe section 22 falls into the humidification fluid accumulation area of ​​the airbag 4. After the negative pressure is turned on, the accumulated humidification fluid can be directly and thoroughly sucked into the suction channel 11 through the suction port 16 and discharged from the body, further preventing excess humidification fluid from entering the lower airway or lungs and improving the safety of the device. In addition, during the adsorption operation, the magnetic block 18 is adsorbed on the limiting block 17, preventing the outer tube 7 from moving and ensuring that the branch pipe section 22 can be stably maintained at the humidification fluid accumulation position, further improving the adsorption effect of excess humidification fluid.

[0034] It should be noted that, in this embodiment, when the tube is removed after the operation is completed, although the branch tube section 22 is in a deflected state, it is made of elastic rubber material, which is soft in texture. When it comes into contact with the inner wall of the airway, it can conform to the shape of the airway and deform elastically, thus limiting the damage to the airway mucosa and ensuring the safety of the tube removal operation.

[0035] Example 4: Figures 3 to 6 As shown, the present invention provides a negative pressure suction device with humidification function for patients with inhalation injury. In addition to the above-mentioned method, the sliding inner tube section 19 and the limiting inner tube section 20 are rotatably connected, and the sliding inner tube section 19 and the main tube section 21 are circumferentially limited and axially sliding.

[0036] In this embodiment, when the branch tube segment 22 and the main tube segment 21 form a second cooperative configuration to perform the adsorption of sputum and excess humidification fluid, the operator rotates the inner tube body 3 externally. The torque of the rotation of the inner tube body 3 is transmitted to the main tube segment 21, causing the nozzle tube segment 12 and the adsorption tube segment 13 to rotate synchronously. During this process, the branch tube segment 22, which is close to the tracheal wall, sweeps along the circumferential direction of the tracheal inner wall as it rotates, and can sequentially adsorb sputum accumulated at different locations around the tracheal wall. Furthermore, during the adsorption operation, the traction rope 8 drives the adsorption tube segment 13 to reciprocate along the axial direction of the sliding inner tube segment 19, which can make the effective adsorption range cover the entire inner wall surface of the airway, further improving the sputum removal effect.

[0037] Furthermore, in this embodiment, the adsorption tube segment 13 and the support tube segment 15 are connected by a deformable tube segment 14 made of a thin film material. The deformable tube segment 14 is soft and lacks the rigidity to effectively transmit torque. When the adsorption tube segment 13 rotates, the deformable tube segment 14 undergoes torsional deformation to absorb the rotation, thus the support tube segment 15 does not rotate and remains stationary relative to the patient's upper airway. For patients with inhalation injuries where upper airway damage is more severe than lower airway damage, the support tube segment 15 corresponding to the upper airway does not experience rotational friction with the upper airway mucosa during the entire rotational adsorption process, avoiding further damage to the upper airway caused by the rotational operation.

[0038] Specifically, the process for sputum adsorption in this embodiment is as follows: In the second cooperative configuration, the branch section 22 and the main section 21 connect the external end of the suction channel 11 to an external negative pressure source. When the negative pressure source is turned on, the diluted sputum in the airway is drawn into the suction channel 11 and discharged from the body through the suction port 16 at the end of the branch section 22 under the action of negative pressure. With the negative pressure source on, the operator slowly rotates the inner tube 3. The torque from the rotation of the inner tube 3 is transmitted to the main tube section 21, causing the nozzle section 12 and the suction section 13 to rotate synchronously. In the second engagement configuration, the suction port 16, close to the tracheal wall, sweeps circumferentially along the inner wall of the trachea, sequentially approaching and suctioning sputum from all circumferential positions of the tracheal wall. The rotation operation should preferably use an alternating forward and reverse reciprocating rotation method. After each appropriate angle of rotation, the tube should be turned back, and the torsional deformation of the deformed tube section 14 should be restored accordingly, preventing the injection channel 10 and the suction channel 11 inside the deformed tube section 14 from collapsing excessively and becoming closed. While performing circumferential adsorption, the traction rope 8 can be tightened and loosened to move the adsorption tube section 13 axially. By combining circumferential rotation with axial reciprocating motion, the suction port 16 can traverse all directions and lengths of the airway inner wall to fully adsorb sputum in the airway. After the circumferential and along-the-path sputum has been absorbed, loosen the guide rope and increase the injection volume of humidifying fluid. This allows the adsorption tube section 13 to return to the airbag 4 along with the nozzle tube section 12. The branch tube section 22 then falls onto the area where the fluid accumulates in the airbag 4, thoroughly suctioning out the excess humidifying fluid, along with the sputum mixed within it, that had been blocked by the airbag 4. If multiple treatments are required, repeat the humidification process and the adsorption procedure described above. After all treatments are completed, turn off the negative pressure source and remove the tube as described above.

[0039] The specific structure of the sliding inner tube section 19 and the limiting inner tube section 20 in this embodiment, which are rotatably connected and fitted, while simultaneously achieving a sealed connection between the inflation channel 5 and the airbag 4, is further explained below: This embodiment adopts a rotary dynamic sealing structure used in the field for conveying fluid through rotating parts. The basic principle of its connection and sealing is as follows: An annular connecting cavity extending along the entire circumference is provided between the rotary mating surfaces of the sliding inner tube section 19 and the limiting inner tube section 20, so that the inflation channel 5 and the air intake channel leading to the airbag 4 remain connected when the sliding inner tube section 19 rotates relative to the limiting inner tube section 20 to any angle; and dynamic sealing elements are provided on both sides of the annular connecting cavity to prevent gas leakage along the gap of the rotary mating surfaces.

[0040] As a preferred embodiment, based on the above method, the surface of the airbag 4 that contacts the patient's airway is further configured as a rough surface.

[0041] In this embodiment, the rough surface increases the friction between the airbag 4 and the inner wall of the airway. On the one hand, this further ensures that the airbag 4 remains stationary relative to the airway when the inner tube 3 rotates. On the other hand, it improves the stability of the airbag 4's blocking position and prevents the airbag 4 from moving along the airway axis during humidification and suctioning operations.

[0042] Example 5: Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the present invention provides a negative pressure suction device with humidification function for patients with inhalation injury. As a preferred embodiment, based on the above method, the diameter of the fitting channel 9 inside the supporting pipe section 15 is further matched with the diameter of the corresponding inner pipe body 3 segment. This structural arrangement ensures a close fit between the supporting pipe section 15 and the inner pipe body 3 without significant play. The inner pipe body 3 achieves stable radial positioning at the supporting pipe section 15, preventing wobbling during rotation and axial operation, thus guaranteeing operational stability and positional accuracy.

[0043] As a preferred embodiment, based on the above method, a turntable 26 is further provided on one side of the outer end of the inner tube 3. The turntable 26 is used to increase the contact area between the operator's hand and the inner tube 3. With this structural arrangement, it is convenient for the operator to apply rotational operation to the inner tube 3, the rotation is less strenuous and the angle is easy to control, further improving the practicality of the invention in actual use.

[0044] As a preferred embodiment, based on the above method, a traction sleeve 27 is further provided at the outer end of the inner tube 3. The traction sleeve 27 is threadedly connected to the inner tube 3. One end of the traction rope 8 extends out of the inner tube 3 and is connected to the top of the traction sleeve 27. When the traction sleeve 27 is rotated, the traction sleeve 27 moves axially relative to the inner tube 3, thereby tightening or loosening the traction rope 8. The top of the traction sleeve 27 is also provided with a nozzle 28 for connecting to an external oxygen source.

[0045] In this embodiment, since the threaded drive has a defined lead, the amount of winding and unwinding of the traction rope 8 corresponds to the number of rotations of the pulling sleeve 27. The operator can precisely control the axial movement of the nozzle section 12 by controlling the number of rotations, making operation labor-saving and stroke controllable, further enhancing the practicality of the invention in actual use. Furthermore, the air nozzle 28 is provided at the top of the pulling sleeve 27. The threaded connection between the pulling sleeve 27 and the inner tube 3 ensures good airtightness of the oxygen supply channel 6, preventing air leakage during the winding and unwinding of the traction rope 8 and ensuring stable oxygen supply pressure.

[0046] As a preferred embodiment, based on the above method, the traction rope 8 and the top of the traction sleeve 27 are rotatably connected.

[0047] Specifically, in this embodiment, a rotatable terminal is provided at the top of the traction sleeve 27, and the traction rope 8 is connected to the terminal. In this embodiment, the traction rope 8 and the top of the traction sleeve 27 are rotatably connected, and the traction rope 8 does not twist when the traction sleeve 27 rotates, effectively reducing the risk of the traction rope 8 being twisted and broken during repeated operations.

[0048] As a preferred embodiment, based on the above method, a plurality of elastic support columns 29 are further provided in the injection channel 10 and the suction channel 11 inside the deformable pipe section 14. The elastic support columns 29 are used to prevent the flow cross section of the injection channel 10 and the suction channel 11 from collapsing.

[0049] The deformable tube section 14 is made of a thin film material. When it is compressed and deformed, and when a negative pressure is formed in the suction channel 11, the thin film tube wall tends to collapse inward. In this embodiment, the elastic support column 29 is provided to support the tube wall of the channel in the radial direction and maintain its flow cross section. At the same time, the elastic support column 29 itself is elastic and can bend and stretch axially with the compression and recovery of the deformable tube section 14, without hindering the axial expansion and contraction deformation of the deformable tube section 14. Thus, while ensuring the expansion and contraction function of the deformable tube section 14, the unobstructed flow of the injection channel 10 and the suction channel 11 is also ensured.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure suction device with humidification function for use in patients with inhalation injury, characterized in that, A negative pressure suction device with humidification function for use in patients with inhalation injury includes an inner tube component and an outer tube component, the outer tube component being sleeved on the outside of the inner tube component; The inner tube component includes an inner tube body and an air bag. The air bag is located at the end of the inner tube body that extends into the trachea. The inner tube body is provided with an inflation channel and an oxygen supply channel. The inflation channel is connected to the air bag. Gas is injected into the air bag through the inflation channel to make it expand and block the patient's airway. The oxygen supply channel is used to form an oxygen supply path after the patient's airway is blocked, to maintain the patient's oxygen needs. The outer tube component includes an outer tube body and a traction rope. The outer tube body is provided with an interlocking channel, an injection channel and a suction channel. The interlocking channel is used for the inner tube body to pass through, the injection channel is used to inject humidifying liquid, and the suction channel is used to form a negative pressure suction passage for suctioning out sputum. The outer tube is divided into a nozzle section, an adsorption section, a deformable section, and a support section from the end that extends into the trachea to the end outside the body. The nozzle section has multiple nozzles on its periphery that atomize the humidifying liquid, and all nozzles are connected to the injection channel. The adsorption section is connected to the suction channel and has a suction port. Under negative pressure, sputum and excess humidifying liquid that has not been absorbed are drawn into the suction channel through the suction port on the adsorption section and discharged from the body. The deformable tube section is made of thin film material; one end of the traction rope is connected to the adsorption tube section, and the other end is inserted into the inner tube body and extends out of the outer end of the inner tube body along the oxygen supply channel; When the traction rope is tightened, the deformable tube section can be compressed and deformed, allowing the nozzle tube section to move away from the airbag along the axial direction of the inner tube. When the traction rope is relaxed, and the amount of humidifying liquid injected through the injection channel is greater than the amount sprayed from the nozzle, the deformable tube section recovers and extends under the pressure of the humidifying liquid, allowing the nozzle tube section to move back to its original position along the axial direction of the inner tube towards the airbag.

2. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 1, characterized in that, The inner tube is provided with a limit stop, and the end face of the nozzle tube section facing the airbag is provided with a magnetic block. After the magnetic block is attracted to the limit stop, the axial displacement between the inner tube and the outer tube is locked.

3. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 2, characterized in that, The inner tube body includes a sliding inner tube section and a limiting inner tube section connected along the axial direction. The airbag is disposed on the limiting inner tube section, and the diameter of the limiting inner tube section is larger than the diameter of the sliding inner tube section. The adsorption tube section includes a main tube section and a branch tube section. The main tube section is sleeved on the sliding inner tube section. The main tube section is connected to the nozzle tube section through a bridge pipe. The nozzle tube section and the main tube section are spaced apart, and the width of the gap between them is greater than the length of the branch tube section. The branch tube section is made of elastic rubber material. One end of the branch tube section is connected to the main tube section, and the other end is provided with the suction port. The tube wall of the branch tube section is provided with a through groove that penetrates through it. The opening width of the through groove is greater than the diameter of the sliding inner tube section and smaller than the diameter of the limiting inner tube section. The main pipe section and the branch pipe section have a first fitting mode and a second fitting mode, and can switch from the first fitting mode to the second fitting mode as the nozzle pipe section moves axially relative to the inner pipe body; In the first fitting configuration, the branch pipe section is sleeved on the limiting inner pipe section, and the main pipe section is sleeved on the sliding inner pipe section; In the second mating configuration, the nozzle pipe section is located on the sliding inner pipe section, the main pipe section is sleeved on the sliding inner pipe section, and the branch pipe section deflects away from the inner pipe body under the action of its own elastic restoring force. The branch pipe section passes over the sliding inner pipe section through the groove, and the central axis of the branch pipe section and the central axis of the main pipe section form an obtuse angle fit.

4. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 3, characterized in that, The sliding inner pipe section and the limiting inner pipe section are rotatably connected, and the sliding inner pipe section and the main pipe section are circumferentially limited and axially sliding.

5. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 4, characterized in that, The surface of the airbag that comes into contact with the patient's airway is roughened.

6. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 5, characterized in that, The diameter of the fitting channel inside the supporting pipe section matches the diameter of the corresponding inner pipe section.

7. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 6, characterized in that, A turntable is provided on one side of the outer end of the inner tube, which is used to increase the contact area between the operator's hand and the inner tube.

8. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 7, characterized in that, The outer end of the inner tube is provided with a traction sleeve, which is threadedly connected to the inner tube. One end of the traction rope extending out of the inner tube is connected to the top of the traction sleeve. When the traction sleeve is rotated, it moves axially relative to the inner tube, thereby tightening or loosening the traction rope. The top of the traction sleeve is also provided with a nozzle for connecting to an external oxygen source.

9. The negative pressure suction device with humidification function for patients with inhalation injury according to claim 8, characterized in that, The traction rope and the top of the traction sleeve are rotatably connected.

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