Lung function respiration sampling device for pneumology department

Abstract

The invention discloses a lung function respiration sampling device for the pneumology department, and relates to the technical field of respiration medicine sampling, the lung function respiration sampling device comprises a gas collecting tube, one end of the gas collecting tube is fixedly connected with a connecting nozzle, the other end of the gas collecting tube is provided with a gas outlet head, and a respiration connector is clamped in the connecting nozzle; the saliva separating mechanism comprises a flow guide pipe arranged in the air collecting pipe, a variable-diameter flow channel and a turn-back flow channel which are communicated with each other are arranged in the flow guide pipe, water absorption cloth is arranged at the joint of the variable-diameter flow channel and the turn-back flow channel, and a first sealing unit is arranged in the breathing connector; through the saliva separation mechanism, saliva is prevented from entering the air collecting tube along with exhaled air, so that the sampling purity is ensured, the authenticity of a subsequent detection result is remarkably improved, moreover, an air inlet of the air collecting tube is sealed through the first sealing unit and the second sealing unit before and after breathing sampling, and the sampling accuracy is improved. External gas is effectively prevented from entering the gas collecting pipe in the sampling process.

Description

Technical Field

[0001] The present invention relates to the technical field of respiratory medicine sampling, and particularly to a pulmonary function respiratory sampling device for the respiratory department. Background Art

[0002] A respiratory sampling device is a medical tool used to collect exhaled gas samples to evaluate lung function and diagnose related diseases. By detecting and analyzing exhaled samples, the physiological and pathological states of the human body can be evaluated. For example, detecting components such as nitric oxide, volatile organic compounds (VOCs), and ketone bodies in exhaled breath can assist in diagnosing diseases such as asthma, chronic obstructive pulmonary disease (COPD), and diabetes, monitor airway inflammation, metabolic levels, and treatment responses, and can also be used for screening of infectious diseases, drug concentration monitoring, etc., providing key data support for early disease detection, efficacy evaluation, and health management.

[0003] Traditional respiratory sampling devices consist of a respiratory interface and a gas collection container. During use, the respiratory interface is installed on the gas collection container, and breathing sampling is achieved by blowing air into the container through the respiratory interface. During the sampling process, saliva in the user's mouth easily enters the container along with the exhaled gas, and microorganisms, enzymes, and chemical substances in the saliva will mix into the exhaled sample, interfering with the detection of gas components. For example, bacterial metabolism in saliva may produce additional carbon dioxide or ammonia, resulting in the detection result deviating from the true alveolar gas composition. Therefore, it is urgent to improve the existing respiratory sampling device. Summary of the Invention

[0004] The purpose of the present invention is to propose a pulmonary function respiratory sampling device for the respiratory department to solve the problem that saliva in the user's mouth easily enters the container along with the exhaled gas during the respiratory sampling process, resulting in the detection result deviating from the true alveolar gas composition.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A pulmonary function respiratory sampling device for the respiratory department includes a gas collection tube, one end of the gas collection tube is fixedly connected with a connecting nozzle, the other end of the gas collection tube is provided with an air outlet head, a respiratory interface is clamped inside the connecting nozzle, and further includes: A saliva separation mechanism, the saliva separation mechanism includes a diversion tube arranged inside the gas collection tube, a variable flow channel and a return flow channel that are interconnected are arranged inside the diversion tube, a water absorption cloth is arranged at the connection of the variable flow channel and the return flow channel, a first sealing unit is arranged inside the respiratory interface, a second sealing unit is arranged inside the gas collection tube, a connection component is arranged between the respiratory interface and the diversion tube, and a sealing film is arranged at the air inlet of the gas collection tube; The exhaled airflow accelerates and then turns back through the variable flow channel of the diversion tube, and the water absorption cloth adsorbs the saliva separated by inertia in the airflow.

[0006] As a further description of the above technical solution: The first sealing unit includes a plastic tube fixed inside the breathing interface, and a one-way membrane flap is fixed to the inner wall of the plastic tube. The second sealing unit includes an outer tube slidably connected inside the gas collecting pipe, and a sealing plug is fixed to one end of the outer tube.

[0007] As a further description of the above technical solution: Plastic sheets are fixed to both the top and bottom of the breathing interface.

[0008] As a further description of the above technical solution: The connection component includes an insertion tube fixed to one end of the breathing interface, a circular ring is fixed to one side of the sealing plug, and a first clamping pin and a second clamping pin for clamping with the diversion tube are respectively fixed to the inner walls of the insertion tube and the circular ring.

[0009] As a further description of the above technical solution: Both sides of the first clamping pin are inclined. When the diversion tube is rotated, the first clamping pin embedded in the outer wall of the diversion tube is disengaged from the clamping connection with the diversion tube.

[0010] As a further description of the above technical solution: It further includes a partitioning mechanism. An inner tube inserted into the outer tube is rotatably connected inside the gas collecting pipe. At least one first baffle is fixedly connected to the inner wall of the gas collecting pipe, and a second baffle with the same number as the first baffle is fixed to the outside of the outer tube.

[0011] As a further description of the above technical solution: The air outlet head is slidably connected inside the inner tube, and a spring is provided between the air outlet head and the inner tube.

[0012] As a further description of the above technical solution: An air outlet hole communicating with the inside of the inner tube is opened in the middle of the air outlet head, and a rubber membrane is fixed inside the air outlet hole. The first baffle and the second baffle divide the inside of the gas collecting pipe into multiple independent spaces, and ventilation holes communicating with each space are opened on the outer tube.

[0013] As a further description of the above technical solution: A strip-shaped hole is opened on the inner tube, and the inner tube can be sequentially and separately communicated with each ventilation hole on the outer tube through deflection.

[0014] In summary, due to the adoption of the above technology, a pulmonary function breathing sampling device for the respiratory department, the beneficial effects of the present invention are: First, through the saliva separation mechanism, the saliva in the exhaled gas is separated and captured during sampling, avoiding the saliva from entering the gas collecting pipe together with the exhaled gas and interfering with the gas component detection, thereby ensuring the purity of the sampling and significantly improving the authenticity of the subsequent detection results. Moreover, before and after the breathing sampling, the first sealing unit and the second sealing unit are used to seal the air inlet of the gas collecting pipe, effectively preventing the outside air from entering the gas collecting pipe during the sampling process and further improving the sampling effect.

[0015] Second, considering the clinical features of patients with chronic obstructive pulmonary disease (COPD) who generally have difficulty exhaling and significantly increased airway resistance, while the first sealing unit in this application plays a sealing role, it can also be automatically opened by relying on the patient's natural biting force, reducing the resistance that the patient needs to overcome during exhalation, effectively alleviating the respiratory work load. This design not only significantly improves the comfort of COPD patients during the sampling process, but also ensures the integrity and accuracy of respiratory sample collection.

[0016] Third, after the respiratory sampling is completed, the present application can divide the interior of the gas collecting pipe into multiple independent spaces through a partitioning mechanism, and can separately access the respiratory samples in each space. This design can meet scenarios such as sample detection retention and multiple access requirements, improving the flexibility of subsequent detection and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows an overall schematic diagram provided according to an embodiment of the present invention; Figure 2 Shows an exploded view of a respiratory interface provided according to an embodiment of the present invention; Figure 3 Shows a schematic cross-sectional view of a respiratory interface provided according to an embodiment of the present invention; Figure 4 Shows a schematic cross-sectional view of a gas collecting pipe provided according to an embodiment of the present invention; Figure 5 Shows provided according to an embodiment of the present invention Figure 4 Enlarged view at A in; Figure 6 Shows an exploded view of a diversion pipe provided according to an embodiment of the present invention; Figure 7 Shows a schematic cross-sectional view of a diversion pipe provided according to an embodiment of the present invention; Figure 8 Shows provided according to an embodiment of the present invention Figure 7 Enlarged view at C in; Figure 9 Shows provided according to an embodiment of the present invention Figure 4 Enlarged view at B in; Figure 10 Shows a schematic diagram of the air flow direction of a diversion pipe provided according to an embodiment of the present invention; Figure 11 Shows provided according to an embodiment of the present invention Figure 10 Enlarged view at D in; Figure 12 Shows a schematic diagram of the air flow direction of an air outlet head provided according to an embodiment of the present invention; Figure 13 Shows a schematic diagram of the positional relationship between an inner pipe and an outer pipe provided according to an embodiment of the present invention.

[0018] Legend Explanation: 10. Gas collecting pipe; 11. Connecting nozzle; 12. Breathing interface; 13. Air outlet head; 20. Saliva separation mechanism; 21. Diversion pipe; 22. Water absorbent cloth; 23. First sealing unit; 231. Plastic pipe; 232. One-way membrane flap; 233. Plastic sheet; 24. Connecting component; 241. Insertion tube; 242. First pin; 243. Ring; 244. Second pin; 25. Second sealing unit; 251. Outer tube; 252. Sealing plug; 30. Partition mechanism; 31. Inner tube; 32. First baffle; 33. Second baffle; 34. Spring; 35. Rubber membrane. Specific Embodiment

[0019] The following will clearly and completely describe a pulmonary function breathing sampling device in the respiratory department of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] As Figures 1 - 13 shown, a pulmonary function breathing sampling device provided by the present invention includes a gas collecting pipe 10. One end of the gas collecting pipe 10 is fixedly connected to a connecting nozzle 11. A sealing film is provided at the air inlet of the gas collecting pipe 10 to keep the gas collecting pipe 10 in a sealed state before breathing sampling to prevent external substances from entering. An air outlet head 13 is provided at the other end of the gas collecting pipe 10. A breathing interface 12 is clamped inside the connecting nozzle 11. During breathing sampling, the breathing interface 12 is clamped and installed with the connecting nozzle 11, and through the breathing interface 12, it is convenient for the user to exhale gas into the gas collecting pipe 10. After sampling, the breathing interface 12 is removed to prevent residual substances such as saliva from contaminating the sample.

[0021] Referring to Figure 7 and Figure 8 , in order to eliminate the interference of saliva on the breathing sample, it further includes a saliva separation mechanism 20. The saliva separation mechanism 20 includes a diversion pipe 21 arranged inside the gas collecting pipe 10. A variable flow channel and a return flow channel that communicate with each other are provided inside the diversion pipe 21. A water absorbent cloth 22 is provided at the connection of the variable flow channel and the return flow channel. The exhaled air flow accelerates and then returns after passing through the variable flow channel of the diversion pipe 21, and the water absorbent cloth 22 adsorbs the saliva separated by inertia in the air flow. The diameter of the variable flow channel gradually decreases from the outside to the inside, which is used to gradually increase the flow rate of the exhaled gas so that the saliva in the air flow is more likely to come into contact with the water absorbent cloth 22 under the action of inertia. The water absorbent cloth 22 is in a bowl shape and has a retention groove on its inner wall, which is used to prevent the adsorbed saliva from being blown into the gas collecting pipe 10 by the air flow.

[0022] Refer to Figure 3 , a first sealing unit 23 is arranged inside the breathing interface 12. The first sealing unit 23 includes a plastic tube 231 fixed inside the breathing interface 12. A one-way membrane flap 232 is fixed to the inner wall of the plastic tube 231. The one-way membrane flap 232 is used to allow air flow to enter the inside of the plastic tube 231 only in one direction, so as to prevent outside air from entering the gas collecting pipe 10 through the plastic tube 231 after the breathing interface 12 is communicated with the gas collecting pipe 10; Refer to Figure 4 and Figure 5 , a second sealing unit 25 is arranged inside the gas collecting pipe 10. The second sealing unit 25 includes an outer tube 251 slidably connected inside the gas collecting pipe 10. A sealing plug 252 is fixed to one end of the outer tube 251. After the breathing interface 12 is pulled out after the breathing sampling is completed, the sealing plug 252 can seal the damaged air inlet of the gas collecting pipe 10, thereby preventing sample leakage and preventing outside gas from contaminating the sample.

[0023] Considering the clinical characteristics that patients with chronic obstructive pulmonary disease (COPD) generally have difficulty exhaling and significantly increased airway resistance, plastic sheets 233 are fixed to both the top and bottom of the breathing interface 12. Both the plastic tube 231 and the plastic sheets 233 are elastic. When the patient holds the breathing interface 12 during breathing sampling, the plastic sheets 233 can squeeze the plastic tube 231 through the biting force. The plastic tube 231 deforms to open the one-way membrane flap 232, thereby weakening the blocking of the one-way membrane flap 232 on the air flow, reducing the resistance that the patient needs to overcome during exhalation, effectively relieving the breathing work load, and improving the comfort of COPD patients during the sampling process.

[0024] Refer to Figure 5 and Figure 6 , in order to prevent the separated saliva from evaporating and mixing into the breathing sample again, a connection component 24 is arranged between the breathing interface 12 and the diversion tube 21. The connection component 24 includes an insertion tube 241 fixed to one end of the breathing interface 12. After the breathing interface 12 is installed in the connection nozzle 11, the insertion tube 241 pierces the sealing film at the air inlet of the gas collecting pipe 10 and is sleeved outside the diversion tube 21. A circular ring 243 is fixed to one side of the sealing plug 252. A first retaining pin 242 and a second retaining pin 244 that are clamped with the diversion tube 21 are respectively fixed to the inner walls of the insertion tube 241 and the circular ring 243. Both the first retaining pin 242 and the second retaining pin 244 are made of elastic plastic, and the clamping and detachment with the diversion tube 21 are realized through their own deformation capabilities; When the breathing interface 12 is pulled out from the connecting mouth 11, the insert tube 241 pulls the guide tube 21 outward through the pin 1 242, and the guide tube 21 drives the ring 243 and the sealing plug 252 to move toward the air inlet of the gas collecting pipe 10 through the pin 244 until the sealing plug 252 seals the air inlet. At this time, the sealing plug 252 and the ring 243 can no longer move under the support of the gas collecting pipe 10, and the guide tube 21 causes the pin 244 to disengage from the groove of the guide tube 21 under the action of the pulling force, and then the guide tube 21 is pulled out from the inside of the gas collecting pipe 10 together with the insert tube 241, so as to avoid the saliva collected in the guide tube 21 from continuously contacting the respiratory sample in the gas collecting pipe 10, thereby ensuring the purity of the respiratory sample.

[0025] The two sides of the latch 242 are inclined, and when the guide tube 21 is rotated, the latch 242 embedded in the outer wall of the guide tube 21 is disengaged from the guide tube 21. At this time, the guide tube 21 can be pulled out from the inside of the insertion tube 241 and used as an independent saliva sample, and the respiratory interface 12 and the insertion tube 241 can be disinfected and put into use again. It is worth mentioning that at this time, pushing the guide tube 21 into the insertion tube 241 can also enable the insertion tube 241 to close and seal the return flow channel of the guide tube 21. At this time, the plastic tube 231 and the one-way membrane flap 232 seal the other opening of the guide tube 21, so that the guide tube 21 is in a sealed state, thereby preventing the saliva inside the guide tube 21 from contaminating the external environment, or preventing the guide tube 21 from being contaminated by external substances when used as a saliva sample.

[0026] Reference Figure 10 In order to enable a single sampling to be used multiple times and improve convenience, a separation mechanism 30 is also included. The interior of the air collecting pipe 10 is rotatably connected to an inner tube 31 inserted into the outer tube 251. The inner wall of the air collecting pipe 10 is fixedly connected to at least one baffle 1 32. The outer side of the outer tube 251 is fixed with the same number of baffles 2 33 as the baffles 1 32. The spacing between each baffle 1 32 and the adjacent baffle 2 33 is the same. In the process of pulling out the breathing interface 12 to drive the sealing plug 252 to move, the outer tube 251 drives the baffle 2 33 to move. After each baffle 2 33 is in contact and sealed with the baffle 1 32, a number of baffles 2 33 and baffle 1 32 separate the internal space of the air collecting pipe 10 into multiple independent spaces, so that the respiratory sample in the air collecting pipe 10 is divided into multiple parts for separate use.

[0027] It is worth mentioning that the staggered baffles 1 32 and baffles 2 33 can also play a turbulent role during breath sampling, increase the complexity of the internal flow channel of the gas collecting pipe 10, thereby improving the uniformity of the gas inside the gas collecting pipe 10, and prolong the residence time of the exhaled gas in the gas collecting pipe 10, thereby improving the capture rate of the breath sample.

[0028] Reference Figure 9 and Figure 11, the air outlet head 13 is slidably connected to the inside of the inner tube 31. A spring 34 is provided between the air outlet head 13 and the inner tube 31. One end of the inner tube 31 is provided with a round hole communicating with the air outlet of the gas collecting pipe 10. When the air outlet head 13 blocks the round hole of the inner tube 31, the gas inside the gas collecting pipe 10 cannot be discharged from the air outlet through the round hole; when the air outlet head 13 is pressed to retract into the inner tube 31, the round hole of the inner tube 31 is opened, and the gas inside the gas collecting pipe 10 can be discharged from the air outlet through the round hole. This design can control the opening and closing of the air outlet of the gas collecting pipe 10 only by pressing the air outlet head 13, improving the convenience of using the device.

[0029] Refer to Figure 12 and Figure 13 , in order to independently access each part of the sample after the sample inside the gas collecting pipe 10 is divided into multiple parts, an air outlet hole communicating with the inside of the inner tube 31 is provided in the middle of the air outlet head 13, and a rubber membrane 35 is fixed inside the air outlet hole. Ventilation holes communicating with each space are provided on the outer tube 251, and strip holes are provided on the inner tube 31. Rotating the air outlet head 13 can drive the inner tube 31 to rotate. The inner tube 31 can be sequentially and separately communicated with each ventilation hole on the outer tube 251 through the strip holes by deflection, realizing the independent access of each part of the sample inside the gas collecting pipe 10. During detection, the rubber membrane 35 can be penetrated by an external connector to detect the respiratory sample inside the gas collecting pipe 10. If the sample does not need to be divided, an external connector is inserted into the air inlet of the gas collecting pipe 10, so that the sealing plug 252 is pushed into the gas collecting pipe 10. The sealing plug 252 no longer seals the air inlet of the gas collecting pipe 10. At this time, the internal spaces of the gas collecting pipe 10 are merged again, facilitating the direct access of the sample.

[0030] Working principle: In the initial state, the air inlet of the gas collecting pipe 10 is sealed by a sealing film, and the air outlet head 13 seals the air outlet of the gas collecting pipe 10; Before sampling, the intubation tube 241 is inserted into the air inlet of the gas collecting pipe 10. The intubation tube 241 pierces the sealing film and extends into the gas collecting pipe 10 to be sleeved outside the diversion tube 21. The breathing interface 12 is inserted into the connecting nozzle 11. After the breathing interface 12 is clamped with the connecting nozzle 11, the intubation tube 241 is clamped with the diversion tube 21 through the first pin 242; During sampling, the user first presses the air outlet head 13 so that the air outlet head 13 no longer blocks the round hole of the inner tube 31. At this time, the internal space of the gas collecting pipe 10 is communicated with the outside through the round hole and the air outlet. Then the breathing interface 12 is put into the mouth and blown outwards. The blown air flow pushes open the one-way membrane flap 232. The air flow passes through the plastic tube 231, the intubation tube 241, the variable flow channel and the return flow channel of the diversion tube 21 in sequence and then enters the gas collecting pipe 10. The user continuously blows. The exhaled gas passes through the gas collecting pipe 10 and is ejected outwards from the air outlet. The first baffle 32 and the second baffle 33 block the exhaled gas, so that the exhaled gas is retained inside the gas collecting pipe 10; After the exhaled gas is accelerated through the variable cross-section flow channel of the diversion pipe 21, it enters the gas collecting pipe 10 through the return flow channel. During this process, the saliva in the airflow will contact the water-absorbing cloth 22 under the action of inertia, and the water-absorbing cloth 22 adsorbs the saliva to separate the saliva from the respiratory sample; After sampling, stop blowing and loosen the air outlet head 13. The air outlet head 13 closes the round hole of the inner pipe 31, closing the air outlet of the gas collecting pipe 10. Then, pull out the breathing interface 12 and the intubation tube 241. When the intubation tube 241 is pulled out, it drives the diversion pipe 21 to move outward through the first latch 242. The diversion pipe 21 drives the ring 243 and the sealing plug 252 to move towards the air inlet of the gas collecting pipe 10 through the second latch 244 until the sealing plug 252 seals the air inlet. At this time, the sealing plug 252 and the ring 243 cannot move anymore under the support of the gas collecting pipe 10. Under the action of the pulling force, the diversion pipe 21 causes the second latch 244 to disengage from the slot of the diversion pipe 21, and then the diversion pipe 21 is pulled out from the inside of the gas collecting pipe 10 together with the intubation tube 241; When the sealing plug 252 moves, it drives the outer pipe 251 to move. The outer pipe 251 drives the second baffle 33 to approach the first baffle 32. After the second baffle 33 contacts and seals with the first baffle 32, several second baffles 33 and the first baffle 32 divide the internal space of the gas collecting pipe 10 into multiple independent spaces, and each space is filled with the respiratory sample, so that the respiratory sample inside the gas collecting pipe 10 is divided into multiple portions for separate use.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention. A pulmonary function respiratory sampling device in the respiratory department and its inventive concept

Claims

1. A pulmonary function breathing sampling device for the department of respiratory medicine, comprising a gas collecting pipe (10), one end of the gas collecting pipe (10) is fixedly connected with a connecting nozzle (11), the other end of the gas collecting pipe (10) is provided with an air outlet head (13), and a breathing interface (12) is clamped inside the connecting nozzle (11), characterized in that, Further comprising: A saliva separation mechanism (20), the saliva separation mechanism (20) includes a diversion pipe (21) disposed inside the gas collecting pipe (10), an internally-connected variable flow channel and a return flow channel are provided inside the diversion pipe (21), a water absorption cloth (22) is provided at the connection of the variable flow channel and the return flow channel, a first sealing unit (23) is provided inside the breathing interface (12), a second sealing unit (25) is provided inside the gas collecting pipe (10), a connection component (24) is provided between the breathing interface (12) and the diversion pipe (21), and a sealing film is provided at the air inlet of the gas collecting pipe (10); The exhaled air flow is accelerated through the variable flow channel of the diversion pipe (21) and then returns, and the water absorption cloth (22) adsorbs the saliva separated by inertia in the air flow.

2. The pulmonary function breathing sampling device for the respiratory department according to claim 1, wherein The first sealing unit (23) includes a plastic pipe (231) fixed inside the breathing interface (12), a one-way membrane flap (232) is fixed on the inner wall of the plastic pipe (231), the second sealing unit (25) includes an outer pipe (251) slidably connected inside the gas collecting pipe (10), and a sealing plug (252) is fixed at one end of the outer pipe (251).

3. The pulmonary function breathing sampling device for the department of respiratory medicine according to claim 1, characterized in that, Plastic sheets (233) are fixed at both the top and bottom of the breathing interface (12).

4. The pulmonary function breathing sampling device for the department of respiratory medicine according to claim 2, characterized in that, The connection component (24) includes an insertion pipe (241) fixed at one end of the breathing interface (12), a circular ring (243) is fixed on one side of the sealing plug (252), and a first retaining pin (242) and a second retaining pin (244) respectively engaged with the diversion pipe (21) are fixed on the inner walls of the insertion pipe (241) and the circular ring (243).

5. The pulmonary function breathing sampling device for the department of respiratory medicine according to claim 4, characterized in that, Both sides of the first retaining pin (242) are inclined, and when the diversion pipe (21) is rotated, the first retaining pin (242) embedded in the outer wall of the diversion pipe (21) is disengaged from the engagement with the diversion pipe (21).

6. The pulmonary function respiration sampling device for the department of respiratory medicine according to claim 2, wherein, Further comprising a separation mechanism (30), an inner pipe (31) inserted into the outer pipe (251) is rotatably connected inside the gas collecting pipe (10), at least one first baffle (32) is fixedly connected to the inner wall of the gas collecting pipe (10), and a second baffle (33) with the same number as the first baffle (32) is fixed outside the outer pipe (251).

7. A pulmonary function breathing sampling device for the respiratory department according to claim 6, characterized in that, The air outlet head (13) is slidably connected inside the inner pipe (31), and a spring (34) is provided between the air outlet head (13) and the inner pipe (31).

8. A pulmonary function breathing sampling device for the respiratory department according to claim 6, characterized in that, An air outlet hole communicating with the inside of the inner pipe (31) is provided in the middle of the air outlet head (13), and a rubber membrane (35) is fixed inside the air outlet hole. The first baffle (32) and the second baffle (33) divide the inside of the gas collecting pipe (10) into multiple independent spaces, and ventilation holes communicating with each space are provided on the outer pipe (251).

9. The pulmonary function breathing sampling device for the department of respiratory medicine according to claim 8, characterized in that, A strip-shaped hole is provided on the inner pipe (31), and the inner pipe (31) can be sequentially and separately communicated with each ventilation hole on the outer pipe (251) through deflection.

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