Infant respiratory tract sputum suction device

Abstract

The invention discloses an infant respiratory tract sputum aspiration device, and belongs to the technical field of medical instruments, the infant respiratory tract sputum aspiration device comprises a negative pressure cylinder providing a negative pressure effect, and the left end of the negative pressure cylinder is fixedly provided with a fixed handle; the negative pressure piston piece is arranged on the inner side of the negative pressure cylinder, and the left end of the negative pressure cylinder is fixedly connected with a telescopic connecting pull rod; the adjusting assembly is installed on the negative pressure cylinder and used for adjusting the stroke of the negative pressure piston piece; the air conveying connecting pipe set is connected to the right end of the negative pressure cylinder, a sputum collecting bottle is connected to the lower portion of the air conveying connecting pipe set, a negative pressure sputum suction pipe is connected to the outer side of the sputum collecting bottle, a fixing pipe is fixedly connected to the right end of the negative pressure sputum suction pipe, and meanwhile a porous suction head is arranged on the inner side of the fixing pipe in a sliding mode; the supporting assembly is installed on the fixing pipe. According to the infant respiratory tract sputum aspiration device, the aspiration strength can be conveniently adjusted, the respiratory tract can be supported and protected in the sputum aspiration process, and the respiratory tract is prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a device for sucking sputum from the respiratory tract of infants. Background Art

[0002] Since infants' respiratory systems are not yet fully developed, they often have increased respiratory secretions due to infections, congenital diseases, etc., and are unable to effectively cough them out. Therefore, a respiratory sputum suction device is needed to help infants expel sputum.

[0003] Prior art 1 (application number: 202222365194.8, Chinese patent with application date of 2022-09-06) discloses a baby suction device, including a liquid storage bottle, a suction tube, an airway tube and a negative pressure suction ball, the negative pressure suction ball including an elastic sac, a first connecting tube and a second connecting tube are respectively fixed at both ends of the elastic sac, a first one-way valve assembly for allowing gas to flow from the airway tube to the inside of the elastic sac in one direction is arranged inside the first connecting tube, a second one-way valve assembly for allowing gas to flow from the inside of the elastic sac to the outside of the elastic sac in one direction is arranged inside the second connecting tube, a pacifier is provided on the external fixing sleeve of the end of the suction tube away from the liquid storage bottle, a fixing mechanism for fixing the pacifier to the baby's face is provided on the pacifier, and the end of the suction tube away from the liquid storage bottle passes through the pacifier and extends to the outside of the pacifier. Easy to use. By providing a pacifier, the baby's resistance to suction operation is reduced. By providing a fixing mechanism, the suction tube can be prevented from falling off, so that the suction operation can be carried out smoothly. Prior art 2 (application number: 202321637160.8, Chinese patent with application date of 2023-06-27) discloses a sputum suction tube for infants and young children, comprising a sputum suction tube main body, a connecting end and an elliptical nasal plug, wherein the sputum suction tube main body is provided with a connecting adjustment component, the connecting adjustment component comprises a ventilation connecting pipe, a separator and an adjusting sleeve, and the connecting adjustment component is provided with two suction pressure quick adjustment components, the suction pressure quick adjustment components comprise a ventilating pipe, a blocking cover and a snap plate; after the ventilating pipe is connected with the sputum suction tube main body through the ventilation connecting pipe, the amount of gas entering the sputum suction tube main body from the outside can be adjusted by blocking different numbers of ventilating pipes, so as to quickly adjust the suction pressure in the sputum suction tube main body, and the position of the suction pressure quick adjustment component on the sputum suction tube main body can be adjusted by setting the ventilation connecting pipe and the adjusting sleeve, and the operation of adjusting the pressure in the sputum suction tube main body will not interrupt the operation of suctioning sputum using the sputum suction tube main body; However, the prior art cannot protect the respiratory tract near the suction head when in use, so that the suction hole is easy to fit the inner wall of the respiratory tract, and the tissue of the respiratory tract is easily damaged during the negative pressure suction process of the suction head, which has certain usage defects. Summary of the invention

[0004] The purpose of the present invention is to provide a device for suctioning sputum from the respiratory tract of infants, so as to solve the problem raised by the above-mentioned background technology that the device for suctioning sputum from the respiratory tract of infants currently on the market cannot protect the respiratory tract near the suction head, so that the suction hole can easily fit the inner wall of the respiratory tract, and the suction head can easily damage the tissue of the respiratory tract during the negative pressure suction process.

[0005] To achieve the above object, the present invention provides the following technical solution: a device for sucking sputum from the respiratory tract of an infant, comprising a negative pressure cylinder for providing a negative pressure effect, wherein a fixed handle is fixedly installed at the left end of the negative pressure cylinder; It also includes: a negative pressure piston sheet, which is arranged on the inner side of the negative pressure cylinder, the left end of the negative pressure cylinder is fixedly connected with a telescopic connecting rod, and the left end of the telescopic connecting rod is fixedly connected with a handle; The adjustment component is installed on the negative pressure cylinder to adjust the stroke of the negative pressure piston; The gas transmission connection tube group is connected to the right end of the negative pressure cylinder, a sputum collection bottle is connected to the lower part of the gas transmission connection tube group, and a negative pressure sputum suction tube is connected to the outside of the sputum collection bottle, and a fixed tube is fixedly connected to the right end of the negative pressure sputum suction tube, and a porous suction head is slidably provided on the inner side of the fixed tube; The support component is installed on the fixed tube to provide auxiliary support and protection for the respiratory tract wall during inhalation.

[0006] Preferably, the negative pressure piston sheet and the negative pressure cylinder are connected in an interference sliding manner, and a telescopic connecting rod on the negative pressure piston sheet passes through the left end of the negative pressure cylinder and forms a telescopic structure with the negative pressure cylinder.

[0007] Through the above structure, the fixed handle is held and pulled, so that the handle drives the negative pressure piston plate to slide inside the negative pressure cylinder through the telescopic connecting rod, so that negative pressure is generated inside the negative pressure cylinder.

[0008] Preferably, the adjustment assembly includes a threaded rod threadedly connected to the left end of the negative pressure cylinder, and the right end of the threaded rod is rotatably connected to an adjustable baffle, and a return spring is connected between the adjustable baffle and the negative pressure piston plate, and at the same time, the telescopic connecting rod passes through the adjustable baffle and forms a sliding structure with the adjustable baffle, and the initial compression of the return spring is adjusted during the movement of the adjustable baffle.

[0009] Through the above structure, the threaded rod is rotated so that the threaded rod drives the adjustable baffle to move and adjust on the inner side of the negative pressure cylinder, thereby causing the adjustable baffle to compress the reset spring, thereby adjusting the initial compression amount of the reset spring to reduce the subsequent pulling speed and stroke of the handle.

[0010] Preferably, the gas supply connecting pipe group includes a gas supply connecting pipe fixedly connected to the right end of the negative pressure cylinder, and the upper and lower ends of the gas supply connecting pipe are respectively connected to a pressure relief exhaust pipe and a negative pressure air inlet pipe, and one-way valve mechanisms are evenly arranged on the inner sides of the pressure relief exhaust pipe and the negative pressure air inlet pipe, and the negative pressure air inlet pipe and the sputum collection bottle are sealed and connected.

[0011] Preferably, the one-way valve mechanism includes an annular sealing baffle fixedly mounted on the inner side of the pressure relief exhaust pipe and the negative pressure intake pipe, and an elastic sealing sheet is elastically mounted on the top of the sealing baffle, and the elastic sealing sheet seals the central hole of the sealing baffle.

[0012] Through the above structure, negative pressure is generated inside the negative pressure cylinder, which makes the elastic sealing sheet in the negative pressure air inlet pipe below the gas transmission connection pipe move elastically. At this time, the sealing partition opens to realize automatic air intake.

[0013] Preferably, a slide groove is provided on the inner wall of the fixed tube, and a first air bag is installed on the inner side of the slide groove, and the left end of the porous suction head is slidably connected to the slide groove, and the left end of the porous suction head is connected to the first air bag, and the porous suction head forms an elastic telescopic structure through the first air bag and the fixed tube, and the porous suction head slides along the slide groove under the action of negative pressure.

[0014] Through the above structure, when the negative pressure suction tube generates suction, the porous suction head will slide along the slide groove under the action of negative pressure to achieve telescopic adjustment with the fixed tube. At the same time, the porous suction head will squeeze the first air bag, so that part of the gas in the first air bag enters the second air bag.

[0015] Preferably, the support assembly is embedded in a second airbag fixedly mounted on the outside of the fixed tube, and the first airbag and the second airbag are connected by a pipe, and after the first airbag is pressurized, part of the gas inside it enters the second airbag through the pipe.

[0016] Preferably, the second airbag is arranged in an annular structure, and the initial outer wall of the second airbag is flush with the outer wall of the fixing tube, and the air pressure inside the second airbag increases and expands to support the inner wall of the respiratory tract.

[0017] Through the above structure, the second airbag expands, and the expanded second airbag will fit and support the inner wall of the respiratory tract, thereby achieving replica support for the respiratory tract where the sputum is located, and avoiding direct contact between the porous suction head and the respiratory tract wall.

[0018] Preferably, a spiral guide groove is provided on the inner wall of the slide groove, and a ball is embedded and installed on the outer wall of the left end of the porous suction head, and the ball rolls along the guide groove.

[0019] With the above structure, when the porous suction head slides along the slide groove, the ball embedded on the outer side of the left end of the porous suction head will roll along the guide groove, so that the porous suction head can rotate while sliding.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the infant respiratory tract sputum suction device can conveniently adjust the suction force, and can support and protect the respiratory tract during the sputum suction process to avoid damage to the respiratory tract. The specific contents are as follows; 1. A threaded rod, an adjustable baffle and a return spring are provided. By rotating the threaded rod, the adjustable baffle is driven to slide on the inner side of the negative pressure cylinder. The adjustable baffle can compress the return spring, thereby adjusting the initial compression amount of the return spring, thereby changing the elastic force and movable stroke of the negative pressure piston during movement, thereby increasing the reaction force on the hands of medical staff, thereby reducing the pulling rate of the negative pressure piston, thereby achieving the adjustment of the adsorption pressure; 2. An air supply connection pipe, a pressure relief exhaust pipe and a negative pressure air inlet pipe are provided. When air is transported in the air supply connection pipe, air can be inhaled and exhausted through the pressure relief exhaust pipe and the negative pressure air inlet pipe. When the sputum collection bottle is connected to the negative pressure air inlet pipe, sputum can be sucked and collected. After use, the sputum collection bottle is connected to the pressure relief exhaust pipe to blow air into the sputum collection bottle, thereby backflushing the negative pressure sputum suction tube to achieve the purpose of cleaning the negative pressure sputum suction tube; 3. A porous suction head, a first air bag and a second air bag are provided. When the negative pressure suction tube is used for suction, the porous suction head will move under the action of negative pressure, thereby sliding along the slide groove of the fixed tube to squeeze the first air bag, so that part of the gas in the first air bag enters the second air bag. When the second air bag is inflated, it can provide a certain support to the inner wall of the respiratory tract to prevent the porous suction head from being adsorbed on the inner wall of the respiratory tract and causing respiratory damage; 4. A fixed tube and a porous suction head are provided. As the porous suction head slides along the slide groove, the ball will slide along the spiral guide groove, thereby driving the porous suction head to rotate, so that the porous suction head can assist sputum to be separated from the respiratory tract through mechanical movement, thereby improving the efficiency of sputum suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a right view structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the negative pressure cylinder of the present invention; Figure 4 It is a schematic diagram of the main cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the gas transmission connection pipe of the present invention; Figure 6 This is a schematic diagram of the installation structure of the porous suction head of the present invention; Figure 7It is a schematic diagram of the cross-sectional structure of the fixed tube and the porous suction head of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle; Fig. 9 It is a schematic diagram of the split structure of the fixed tube and the porous tip of the present invention.

[0022] In the figure: 1. negative pressure cylinder; 2. fixed handle; 3. negative pressure piston plate; 4. telescopic connecting rod; 5. handle; 6. threaded rod; 7. adjustable baffle; 8. reset spring; 9. gas transmission connection pipe; 10. pressure relief exhaust pipe; 11. negative pressure air inlet pipe; 12. sealing partition; 13. elastic sealing plate; 14. sputum collection bottle; 15. negative pressure suction tube; 16. fixed tube; 17. slide groove; 18. porous suction head; 19. first air bag; 20. second air bag; 21. guide groove; 22. ball bearing. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1-Figure 4 As shown, the existing infant respiratory tract sputum suction device cannot adjust the suction force and suction volume during use, which easily causes respiratory tract damage. In order to solve this technical problem, this embodiment discloses the following technical content; A device for sucking sputum from the respiratory tract of infants comprises a negative pressure cylinder 1 for providing negative pressure, and a fixed handle 2 is fixedly mounted on the left end of the negative pressure cylinder 1; It also includes: a negative pressure piston sheet 3, which is arranged on the inner side of the negative pressure cylinder 1, a telescopic connecting rod 4 is fixedly connected to the left end of the negative pressure cylinder 1, and a handle 5 is fixedly connected to the left end of the telescopic connecting rod 4; The adjustment component is installed on the negative pressure cylinder 1 to adjust the stroke of the negative pressure piston plate 3; The negative pressure piston sheet 3 is connected to the negative pressure cylinder 1 by interference sliding, and the telescopic connecting rod 4 on the negative pressure piston sheet 3 passes through the left end of the negative pressure cylinder 1 and forms a telescopic structure with the negative pressure cylinder 1 .

[0025] The adjustment component includes a threaded rod 6 threadedly connected to the left end of the negative pressure cylinder 1, and the right end of the threaded rod 6 is rotatably connected to an adjustable baffle 7, and a return spring 8 is connected between the adjustable baffle 7 and the negative pressure piston plate 3. At the same time, the telescopic connecting rod 4 passes through the adjustable baffle 7 and forms a sliding structure with the adjustable baffle 7, and the initial compression amount of the return spring 8 is adjusted during the movement of the adjustable baffle 7.

[0026] The gas supply connecting pipe group includes a gas supply connecting pipe 9 fixedly connected to the right end of the negative pressure cylinder 1, and the upper and lower ends of the gas supply connecting pipe 9 are respectively connected to a pressure relief exhaust pipe 10 and a negative pressure air inlet pipe 11, and the inner sides of the pressure relief exhaust pipe 10 and the negative pressure air inlet pipe 11 are evenly provided with a one-way valve mechanism, and the negative pressure air inlet pipe 11 and the sputum collection bottle 14 are sealed and connected.

[0027] The one-way valve mechanism includes an annular sealing baffle 12 fixedly installed on the inner side of the pressure relief exhaust pipe 10 and the negative pressure intake pipe 11, and an elastic sealing sheet 13 is elastically fitted on the top of the sealing baffle 12, and the elastic sealing sheet 13 seals the central hole of the sealing baffle 12.

[0028] By adopting the above technical solution, the negative pressure sputum suction tube 15 is inserted into the sputum in the infant's respiratory tract, the fixed handle 2 is held and the handle 5 is pulled, so that the handle 5 drives the negative pressure piston plate 3 to slide on the inner side of the negative pressure cylinder 1 through the telescopic connecting rod 4, so that the inner side of the negative pressure cylinder 1 generates a negative pressure effect, and then the elastic sealing plate 13 in the negative pressure air inlet pipe 11 under the air supply connection pipe 9 moves elastically. At this time, the sealing partition 12 opens to realize automatic air intake, so that sputum is extracted through the negative pressure sputum suction tube 15. When it is necessary to adjust the suction force and the amount of air inhaled, the threaded rod 6 is rotated so that the threaded rod 6 is The grooved rod 6 drives the adjustable baffle 7 to move and adjust on the inner side of the negative pressure cylinder 1, so that the adjustable baffle 7 compresses the reset spring 8, thereby adjusting the initial compression amount of the reset spring 8 to reduce the pulling speed and stroke of the subsequent handle 5, thereby realizing convenient adjustment of the suction force and the suction volume. After the sputum suction is completed, the negative pressure cylinder 1 is rotated so that the pressure relief exhaust pipe 10 faces downward, and the pressure relief exhaust pipe 10 and the sputum collection bottle 14 are connected. At this time, pulling and releasing the handle 5 can make the pressure relief exhaust pipe 10 recoil the negative pressure suction tube 15, thereby realizing convenient cleaning.

[0029] Embodiment 2: The technical content disclosed in this embodiment is a further improvement on the above embodiment 1. The existing suction component structure of the infant respiratory tract sputum suction device is single, and can only rely on negative pressure to achieve the separation of sputum and respiratory tract, and the respiratory tract structure is easily damaged during the suction process. In order to further solve this technical problem, this embodiment discloses the following technical content, such as Figure 4-Figure 9 As shown; The gas transmission connection tube group is connected to the right end of the negative pressure cylinder 1, and a sputum collection bottle 14 is connected to the lower part of the gas transmission connection tube group, and a negative pressure sputum suction tube 15 is connected to the outer side of the sputum collection bottle 14, and a fixed tube 16 is fixedly connected to the right end of the negative pressure sputum suction tube 15, and a porous suction head 18 is slidably provided on the inner side of the fixed tube 16; The support assembly is installed on the fixed tube 16 to provide auxiliary support and protection for the respiratory tract wall during inhalation.

[0030] The inner wall of the fixed tube 16 is provided with a slide groove 17, and the inner side of the slide groove 17 is installed with a first air bag 19, and the left end of the porous suction head 18 is slidably connected to the slide groove 17, and the left end of the porous suction head 18 is connected to the first air bag 19, and the porous suction head 18 forms an elastic telescopic structure through the first air bag 19 and the fixed tube 16, and the porous suction head 18 slides along the slide groove 17 under the action of negative pressure.

[0031] The support assembly is embedded in the second airbag 20 fixedly mounted on the outside of the fixing tube 16 , and the first airbag 19 and the second airbag 20 are connected by a pipeline, and after the first airbag 19 is pressurized, part of the gas inside it enters the second airbag 20 through the pipeline.

[0032] The second airbag 20 is arranged in an annular structure, and the initial outer wall of the second airbag 20 is flush with the outer wall of the fixing tube 16, and the air pressure inside the second airbag 20 increases and expands to support the inner wall of the respiratory tract.

[0033] A spiral guide groove 21 is formed on the inner wall of the slide groove 17 , and a ball 22 is embedded and installed on the outer wall of the left end of the porous suction head 18 , and the ball 22 rolls along the guide groove 21 .

[0034] Through the above technical scheme, when the negative pressure sputum suction tube 15 generates suction, the porous suction head 18 will slide along the slide groove 17 under the action of negative pressure, and realize the telescopic adjustment with the fixed tube 16. At the same time, the porous suction head 18 will squeeze the first air bag 19, so that part of the gas in the first air bag 19 enters the second air bag 20, causing the second air bag 20 to expand. The expanded second air bag 20 will fit and support the inner wall of the respiratory tract, and realize the replica support of the respiratory tract where the sputum is located, avoiding direct contact between the porous suction head 18 and the respiratory tract wall. As the porous suction head 18 slides along the slide groove 17, the ball 22 embedded on the outer side of the left end of the porous suction head 18 will roll along the guide groove 21, so that the porous suction head 18 can rotate while sliding. At this time, the porous suction head 18 can pull the adsorbed sputum, so that the sputum and the inner wall of the respiratory tract are separated, thereby improving the sputum suction efficiency.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for sucking sputum from the respiratory tract of an infant, comprising a negative pressure cylinder (1) for providing a negative pressure effect, wherein a fixed handle (2) is fixedly mounted on the left end of the negative pressure cylinder (1); It is characterized in that Also includes: A negative pressure piston plate (3) is arranged on the inner side of the negative pressure cylinder (1); a telescopic connecting rod (4) is fixedly connected to the left end of the negative pressure cylinder (1); and a handle (5) is fixedly connected to the left end of the telescopic connecting rod (4); An adjustment component is installed on the negative pressure cylinder (1) to adjust the stroke of the negative pressure piston plate (3); An air supply connection tube group is connected to the right end of the negative pressure cylinder (1), a sputum collection bottle (14) is connected to the lower part of the air supply connection tube group, a negative pressure sputum suction tube (15) is connected to the outer side of the sputum collection bottle (14), and a fixed tube (16) is fixedly connected to the right end of the negative pressure sputum suction tube (15), and a porous suction head (18) is slidably provided on the inner side of the fixed tube (16); The support assembly is mounted on the fixed tube (16) to provide auxiliary support and protection for the respiratory tract wall during inhalation.

2. The infant respiratory tract sputum suction device according to claim 1, characterized in that: The negative pressure piston plate (3) and the negative pressure cylinder (1) are connected in an interference sliding manner, and the telescopic connecting rod (4) on the negative pressure piston plate (3) passes through the left end of the negative pressure cylinder (1) and forms a telescopic structure with the negative pressure cylinder (1).

3. The infant respiratory tract sputum suction device according to claim 1, characterized in that: The adjustment component comprises a threaded rod (6) threadedly connected to the left end of the negative pressure cylinder (1), and the right end of the threaded rod (6) is rotatably connected to an adjustable baffle (7), and a return spring (8) is connected between the adjustable baffle (7) and the negative pressure piston plate (3), and a telescopic connecting rod (4) passes through the adjustable baffle (7) and forms a sliding structure with the adjustable baffle (7), and the initial compression amount of the return spring (8) is adjusted during the movement of the adjustable baffle (7).

4. The infant respiratory tract sputum suction device according to claim 1, characterized in that: The gas transmission connection pipe assembly comprises a gas transmission connection pipe (9) fixedly connected to the right end of the negative pressure cylinder (1), and the upper and lower ends of the gas transmission connection pipe (9) are respectively connected to a pressure relief exhaust pipe (10) and a negative pressure air intake pipe (11), and one-way valve mechanisms are evenly arranged on the inner sides of the pressure relief exhaust pipe (10) and the negative pressure air intake pipe (11), and the negative pressure air intake pipe (11) and the sputum collection bottle (14) are sealed and connected.

5. The infant respiratory tract sputum suction device according to claim 4, characterized in that: The one-way valve mechanism comprises an annular sealing baffle (12) fixedly mounted on the inner side of the pressure relief exhaust pipe (10) and the negative pressure intake pipe (11), and an elastic sealing sheet (13) is elastically mounted on the upper side of the sealing baffle (12), and the elastic sealing sheet (13) seals the central hole of the sealing baffle (12).

6. The infant respiratory tract sputum suction device according to claim 1, characterized in that: The inner wall of the fixed tube (16) is provided with a slide groove (17), and a first air bag (19) is installed on the inner side of the slide groove (17), and the left end of the porous suction head (18) is slidably connected to the slide groove (17), and the left end of the porous suction head (18) is connected to the first air bag (19), and the porous suction head (18) forms an elastic telescopic structure through the first air bag (19) and the fixed tube (16), and the porous suction head (18) slides along the slide groove (17) under the action of negative pressure.

7. The infant respiratory tract sputum suction device according to claim 1, characterized in that: The support assembly is embedded in a second airbag (20) fixedly mounted on the outside of the fixing tube (16), and the first airbag (19) and the second airbag (20) are connected via a pipeline, and after the first airbag (19) is pressurized, part of the gas inside the first airbag (19) enters the second airbag (20) through the pipeline.

8. The infant respiratory tract sputum suction device according to claim 7, characterized in that: The second airbag (20) is arranged in an annular structure, and the initial outer wall of the second airbag (20) is flush with the outer wall of the fixing tube (16), and the air pressure inside the second airbag (20) increases and expands to support the inner wall of the respiratory tract.

9. The infant respiratory tract sputum suction device according to claim 6, characterized in that: A spiral guide groove (21) is provided on the inner wall of the slide groove (17), and a ball (22) is embedded and installed on the outer wall of the left end of the porous suction head (18), and the ball (22) rolls along the guide groove (21).

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